diff --git a/app/(main)/asns/page.tsx b/app/(main)/asns/page.tsx
index cc5230df..74521dbc 100644
--- a/app/(main)/asns/page.tsx
+++ b/app/(main)/asns/page.tsx
@@ -35,7 +35,7 @@ export default function AsnsPage() {
       (r) =>
         r.asn.toLowerCase().includes(q) ||
         r.org.toLowerCase().includes(q) ||
-        String(r.prefixes).includes(q),
+        (r.prefixes === null ? "" : String(r.prefixes)).includes(q),
     )
   }, [rows, search])
 
diff --git a/app/(main)/communities/page.tsx b/app/(main)/communities/page.tsx
index b7417af6..a6d9b05d 100644
--- a/app/(main)/communities/page.tsx
+++ b/app/(main)/communities/page.tsx
@@ -256,7 +256,7 @@ export default function CommunitiesPage() {
                     {[
                       ["Тип",       TYPE_LABELS[selected.type]],
                       ["Действие",  `${ACTION_LABELS[selected.action]}${selected.actionValue !== undefined ? ` ${selected.actionValue}` : ""}`],
-                      ["Маршрутов", selected.prefixCount.toLocaleString("ru-RU")],
+                      ["Маршрутов", selected.prefixCount?.toLocaleString("ru-RU") ?? "—"],
                       ["Серверов",  selected.serverCount.toLocaleString("ru-RU")],
                     ].map(([k, v]) => (
                       <div key={k} className="flex justify-between gap-2">
diff --git a/backend/package.json b/backend/package.json
index 4deff10f..6ce1fe9b 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -28,7 +28,7 @@
     "test:backups": "tsx src/services/backup-scheduler-run.test.ts && tsx src/services/backup-restore.test.ts && tsx src/services/backup-deletion.test.ts && tsx src/services/backup-dto.test.ts && tsx src/services/backup-storage-update.test.ts && tsx src/services/backup-job-execution.test.ts && tsx src/routes/backups-operations.test.ts && tsx src/services/s3-backup-client.test.ts",
     "test:live-maps": "tsx src/services/ospf-route-parse.test.ts && tsx src/services/vxlan-live.test.ts && tsx src/services/containers-live.test.ts && tsx src/services/firewall-poll.test.ts && tsx src/services/gre-catalog-poll.test.ts && tsx src/routes/filters-gre-catalog.test.ts && tsx src/routes/bgp-catalog.test.ts && tsx src/services/bgp-catalog-parse.test.ts && tsx src/routes/ospf-catalog.test.ts && tsx src/services/ospf-observed-values.test.ts",
     "test": "npm run test:probes && npm run test:exec && npm run test:alert-engine && npm run test:auth && npm run test:wireguard && npm run test:traffic-rate && npm run test:traffic-flow && npm run test:users && npm run test:pg && npm run test:backups && npm run test:scheduler && npm run test:live-maps && npm run test:ospf-optimizer && npm run test:recursive-routes && npm run test:config-sync && npm run test:ros-file && npm run test:containers && npm run test:certificates && npm run test:netflow-settings && npm run test:netflow-purge && npm run test:evolution",
-    "test:evolution": "tsx src/routes/evobgp-settings.test.ts && tsx src/plugins/auth.evolution-settings.test.ts",
+    "test:evolution": "tsx src/services/evobgp-catalog.test.ts && tsx src/routes/evobgp-settings.test.ts && tsx src/plugins/auth.evolution-settings.test.ts",
     "test:netflow-purge": "tsx src/db/operation-lock.test.ts && tsx src/services/traffic-flow-purge-execution.test.ts && tsx src/routes/traffic-flow-purge.test.ts",
     "test:netflow-settings": "tsx src/services/traffic-flow-host-file-builders.test.ts && tsx src/services/traffic-flow-key-execution.test.ts && tsx src/routes/traffic-flow-settings.test.ts && tsx src/plugins/auth.netflow-settings.test.ts",
     "test:geoip": "tsx src/services/traffic-flow-geoip.test.ts && tsx src/plugins/auth.geoip.test.ts",
diff --git a/backend/src/routes/evobgp.ts b/backend/src/routes/evobgp.ts
index b36d695e..b0bf6ceb 100644
--- a/backend/src/routes/evobgp.ts
+++ b/backend/src/routes/evobgp.ts
@@ -1,6 +1,7 @@
 import { eq, sql } from "drizzle-orm"
 import type { FastifyPluginAsyncZod } from "@fastify/type-provider-zod"
 import { normalizeEvoBgpBaseUrl as normalizeBaseUrl, normalizeEvoBgpApiKey as normalizeApiKey } from "@mmapp/contracts/evobgp"
+import { parseEvoCatalogRaw, aggregateCommunityRouteCounts } from "../services/evobgp-catalog.js"
 import { createEvoBgpSettingsRoutes } from "./evobgp-settings.js"
 import { db } from "../db/index.js"
 import { evobgpSettings, filterRules } from "../db/schema.js"
@@ -14,67 +15,6 @@ async function ensureEvobgpRow() {
   return row!
 }
 
-interface EvoCatalogRaw {
-  modules: { items: Array<{ id: string; name: string; type: string }> }
-  domains: {
-    items: Array<{
-      module_id: string
-      entry: { id: string; fqdn: string; community_id?: string | null }
-    }>
-  }
-  asns: {
-    items: Array<{
-      module_id: string
-      entry: {
-        id: string
-        asn: number
-        community_id?: string | null
-        asn_name?: string | null
-        prefix_count?: number | null
-        asn_resolved_at?: string | null
-      }
-    }>
-  }
-  ip_ranges: {
-    items: Array<{
-      module_id: string
-      entry: { id: string; prefix: string; community_id: string }
-    }>
-  }
-  communities: {
-    items: Array<{ id: string; community?: string; title?: string }>
-  }
-}
-
-/**
- * По UUID community в каталоге EvoBGP: сумма «маршрутов» —
- * 1 на домен, 1 на CIDR в ip_ranges, prefix_count на ASN.
- */
-function aggregateCommunityRouteCounts(catalog: EvoCatalogRaw): Map<string, number> {
-  const routesPerComm = new Map<string, number>()
-  function bump(commId: string, routeAdd: number) {
-    routesPerComm.set(commId, (routesPerComm.get(commId) ?? 0) + routeAdd)
-  }
-
-  for (const rowItem of catalog.domains?.items ?? []) {
-    const cid = rowItem.entry.community_id
-    if (cid) bump(cid, 1)
-  }
-  for (const rowItem of catalog.ip_ranges?.items ?? []) {
-    const cid = rowItem.entry.community_id
-    if (cid) bump(cid, 1)
-  }
-  for (const rowItem of catalog.asns?.items ?? []) {
-    const cid = rowItem.entry.community_id
-    if (!cid) continue
-    const pc = rowItem.entry.prefix_count
-    const n = typeof pc === "number" && Number.isFinite(pc) && pc >= 0 ? Math.trunc(pc) : 0
-    bump(cid, n)
-  }
-
-  return routesPerComm
-}
-
 /**
  * Уникальные серверы из локальной БД, у которых в BGP-фильтре указан community (строка AS:NNN).
  * Ключ — значение `filter_rules.community` после trim (как в EvoBGP `community`).
@@ -168,10 +108,10 @@ const evobgpRoutes: FastifyPluginAsyncZod = async (app) => {
       return reply.status(400).send({ error: "Не заданы базовый URL или API-ключ в БД" })
     }
     try {
-      const catalog = await fetchEvoJson<EvoCatalogRaw>(cred.root, "/v1/router-lists/catalog", cred.apiKey)
-      const modules = catalog.modules?.items ?? []
+      const catalog = parseEvoCatalogRaw(await fetchEvoJson<unknown>(cred.root, "/v1/router-lists/catalog", cred.apiKey))
+      const modules = catalog.modules.items
       const modMap = new Map(modules.map((m) => [m.id, m]))
-      const commItems = catalog.communities?.items ?? []
+      const commItems = catalog.communities.items
       const commLabel = new Map<string, string>()
       for (const c of commItems) {
         const label = (c.community && c.title)
@@ -183,7 +123,7 @@ const evobgpRoutes: FastifyPluginAsyncZod = async (app) => {
       const fmtTime = new Date().toLocaleString("ru-RU")
       const fetchedAt = new Date().toISOString()
 
-      const domains = (catalog.domains?.items ?? []).map((rowItem) => {
+      const domains = catalog.domains.items.map((rowItem) => {
         const mod = modMap.get(rowItem.module_id)
         const cid = rowItem.entry.community_id
         return {
@@ -198,7 +138,7 @@ const evobgpRoutes: FastifyPluginAsyncZod = async (app) => {
         }
       })
 
-      const ipRanges = (catalog.ip_ranges?.items ?? []).map((rowItem) => {
+      const ipRanges = catalog.ip_ranges.items.map((rowItem) => {
         const mod = modMap.get(rowItem.module_id)
         const cid = rowItem.entry.community_id
         return {
@@ -213,13 +153,11 @@ const evobgpRoutes: FastifyPluginAsyncZod = async (app) => {
         }
       })
 
-      const asns = (catalog.asns?.items ?? []).map((rowItem) => {
+      const asns = catalog.asns.items.map((rowItem) => {
         const cid = rowItem.entry.community_id
         const e = rowItem.entry
         const name = (e.asn_name ?? "").trim()
-        const pc = e.prefix_count
-        const prefixes =
-          typeof pc === "number" && Number.isFinite(pc) && pc >= 0 ? Math.trunc(pc) : 0
+        const prefixes = e.prefix_count ?? null
         let updated = fmtTime
         const rawResolved = (e.asn_resolved_at ?? "").trim()
         if (rawResolved) {
@@ -251,7 +189,7 @@ const evobgpRoutes: FastifyPluginAsyncZod = async (app) => {
           type: "custom" as const,
           filterIds: [] as string[],
           serverCount: valueStr ? (serversByCommunityStr.get(valueStr) ?? 0) : 0,
-          prefixCount: routeCountsByCommUuid.get(c.id) ?? 0,
+          prefixCount: routeCountsByCommUuid.has(c.id) ? routeCountsByCommUuid.get(c.id)! : 0,
           action: "permit" as const,
           enabled: true,
         }
diff --git a/backend/src/services/evobgp-catalog.test.ts b/backend/src/services/evobgp-catalog.test.ts
new file mode 100644
index 00000000..980ccf97
--- /dev/null
+++ b/backend/src/services/evobgp-catalog.test.ts
@@ -0,0 +1,32 @@
+import assert from "node:assert/strict"
+import { test } from "node:test"
+import { parseEvoCatalogRaw, aggregateCommunityRouteCounts } from "./evobgp-catalog.js"
+const empty = { modules:{items:[]}, domains:{items:[]}, ip_ranges:{items:[]}, asns:{items:[]}, communities:{items:[]} }
+const asn = {module_id:"m",entry:{id:"a",asn:64512,community_id:"c"}}
+
+test("upstream catalog requires every collection; known empty stays empty", () => {
+ assert.deepEqual(parseEvoCatalogRaw(empty),empty)
+ for(const section of Object.keys(empty)) {
+  for(const bad of [undefined,null,{}, {items:null}]) assert.throws(()=>parseEvoCatalogRaw({...empty,[section]:bad}), /не подтверждён/)
+ }
+ for(const raw of [null,{},[],{error:"upstream unavailable"}]) assert.throws(()=>parseEvoCatalogRaw(raw), /не подтверждён/)
+})
+test("row identities, ASN range and integral counts are checked before mapping", () => {
+ for(const entry of [{...asn.entry,id:""},{...asn.entry,asn:0},{...asn.entry,asn:4294967296},...[-1,1.5,Number.MAX_SAFE_INTEGER+1,"5"].map(prefix_count=>({...asn.entry,prefix_count}))]) assert.throws(()=>parseEvoCatalogRaw({...empty,asns:{items:[{...asn,entry}]}}), /не подтверждён/)
+ assert.throws(()=>parseEvoCatalogRaw({...empty,asns:{items:[asn,asn]}}))
+ assert.throws(()=>parseEvoCatalogRaw({...empty,domains:{items:[{module_id:"m",entry:{id:"d"}}]}}))
+ assert.throws(()=>parseEvoCatalogRaw({...empty,modules:{items:[{id:"m",name:"module"}]}}))
+ assert.equal(parseEvoCatalogRaw({...empty,asns:{items:[asn,{...asn,module_id:"other"}]}}).asns.items.length,2)
+})
+test("unknown ASN count propagates to its community, known zero stays zero", () => {
+ for(const prefix_count of [undefined,null]) {
+  const raw={...empty,domains:{items:[{module_id:"m",entry:{id:"d",fqdn:"example.test",community_id:"c"}}]},asns:{items:[{...asn,entry:{...asn.entry,prefix_count}},{...asn,entry:{...asn.entry,id:"zero",community_id:"z",prefix_count:0}}]}}
+  const totals=aggregateCommunityRouteCounts(parseEvoCatalogRaw(raw))
+  assert.equal(totals.get("c"),null);assert.equal(totals.get("z"),0)
+ }
+})
+test("known sums include domains, CIDR and prefixes; safe integer overflow fails", () => {
+ const raw={...empty,domains:{items:[{module_id:"m",entry:{id:"d",fqdn:"example.test",community_id:"c"}}]},ip_ranges:{items:[{module_id:"m",entry:{id:"r",prefix:"192.0.2.0/24",community_id:"c"}}]},asns:{items:[{...asn,entry:{...asn.entry,prefix_count:5}}]}}
+ assert.equal(aggregateCommunityRouteCounts(parseEvoCatalogRaw(raw)).get("c"),7)
+ assert.throws(()=>aggregateCommunityRouteCounts(parseEvoCatalogRaw({...raw,asns:{items:[{...asn,entry:{...asn.entry,prefix_count:Number.MAX_SAFE_INTEGER}}]}})), /вне допустимого диапазона/)
+})
diff --git a/backend/src/services/evobgp-catalog.ts b/backend/src/services/evobgp-catalog.ts
new file mode 100644
index 00000000..1951aba0
--- /dev/null
+++ b/backend/src/services/evobgp-catalog.ts
@@ -0,0 +1,42 @@
+import { z } from "zod"
+
+const id = z.string().trim().min(1)
+const count = z.number().int().nonnegative().safe()
+const communityId = id.nullish()
+function items<T extends z.ZodType>(row: T, key: (value: z.output<T>) => string) {
+  return z.object({ items: z.array(row).refine(rows => new Set(rows.map(key)).size === rows.length) })
+}
+const schema = z.object({
+  modules: items(z.object({ id, name: z.string(), type: z.string() }), row => row.id),
+  domains: items(z.object({ module_id: id, entry: z.object({ id, fqdn: id, community_id: communityId }) }), row => `${row.module_id}:${row.entry.id}`),
+  ip_ranges: items(z.object({ module_id: id, entry: z.object({ id, prefix: id, community_id: id }) }), row => `${row.module_id}:${row.entry.id}`),
+  asns: items(z.object({ module_id: id, entry: z.object({
+    id, asn: z.number().int().min(1).max(4294967295), community_id: communityId,
+    asn_name: z.string().nullish(), prefix_count: count.nullish(),
+    asn_resolved_at: z.string().nullish(),
+  }) }), row => `${row.module_id}:${row.entry.id}`),
+  communities: items(z.object({ id, community: z.string().optional(), title: z.string().optional() }), row => row.id),
+})
+export type EvoCatalogRaw = z.output<typeof schema>
+
+export function parseEvoCatalogRaw(raw: unknown): EvoCatalogRaw {
+  const result = schema.safeParse(raw)
+  if (!result.success) throw new Error("Каталог Evolution не подтверждён: получен некорректный ответ интеграции")
+  return result.data
+}
+
+/** Домен/CIDR дают один маршрут; неизвестный prefix_count ASN делает итог community неизвестным. */
+export function aggregateCommunityRouteCounts(catalog: EvoCatalogRaw): Map<string, number | null> {
+  const totals = new Map<string, number | null>()
+  function add(community: string, count: number | null) {
+    const previous = totals.has(community) ? totals.get(community)! : 0
+    if (previous === null || count === null) { totals.set(community, null); return }
+    const total = previous + count
+    if (!Number.isSafeInteger(total)) throw new Error("Каталог Evolution не подтверждён: итог маршрутов вне допустимого диапазона")
+    totals.set(community, total)
+  }
+  for (const { entry } of catalog.domains.items) if (entry.community_id) add(entry.community_id, 1)
+  for (const { entry } of catalog.ip_ranges.items) add(entry.community_id, 1)
+  for (const { entry } of catalog.asns.items) if (entry.community_id) add(entry.community_id, entry.prefix_count ?? null)
+  return totals
+}
diff --git a/components/data-grids/asns-data-grid.tsx b/components/data-grids/asns-data-grid.tsx
index 10236842..51f481b0 100644
--- a/components/data-grids/asns-data-grid.tsx
+++ b/components/data-grids/asns-data-grid.tsx
@@ -58,7 +58,7 @@ function AsnsDataGrid({ asns, isLoading, pagination = false }: AsnsDataGridProps
         accessorKey: "prefixes",
         header: ({ column }) => <DataGridSortHeader column={column} title="Префиксов" />,
         cell: ({ row }) => (
-          <span className="font-mono tabular-nums">{row.original.prefixes.toLocaleString("ru")}</span>
+          <span className="font-mono tabular-nums">{row.original.prefixes?.toLocaleString("ru") ?? "—"}</span>
         ),
         meta: {
           headerTitle: "Префиксов",
diff --git a/components/data-grids/communities-data-grid.tsx b/components/data-grids/communities-data-grid.tsx
index 29d43587..0db97a61 100644
--- a/components/data-grids/communities-data-grid.tsx
+++ b/components/data-grids/communities-data-grid.tsx
@@ -34,7 +34,7 @@ export interface CommunityRow {
   type: CommunityType
   filterIds: string[]
   serverCount: number
-  prefixCount: number
+  prefixCount: number | null
   action: "permit" | "deny" | "local-pref" | "metric"
   actionValue?: number
   enabled: boolean
@@ -177,7 +177,7 @@ function CommunitiesDataGrid({
         ),
         cell: ({ row }) => (
           <span className="font-mono text-xs tabular-nums text-right block">
-            {row.original.prefixCount.toLocaleString("ru-RU")}
+            {row.original.prefixCount?.toLocaleString("ru-RU") ?? "—"}
           </span>
         ),
         meta: {
diff --git a/docs/ux-ui-plan.md b/docs/ux-ui-plan.md
index ed1edd5a..5b3ba2fa 100644
--- a/docs/ux-ui-plan.md
+++ b/docs/ux-ui-plan.md
@@ -276,3 +276,5 @@ REST запрос → ожидание → подтверждённый output /
 Завершён 11Б.3.5.2: Evolution backend selective RETURNING save/public receipt и проверка items upstream/test; DI HTTP/JWT, backend build/lint прошли. Старый provider совместим с публичными полями, ещё не мигрирован. Далее 11Б.3.5.3 — provider known/error/time/source; затем форма и upstream catalog validation.
 
 Завершён 11Б.3.5.3.1: Evolution provider known/error/time/readers/source/strict receipts, статус Settings; 8 provider (один selector повторён), 2 прежних и 6 source E2E, lint/typecheck/production build прошли. Форма/consumer mocks ещё не приняты. Далее 11Б.3.5.3.2 — upstream catalog strict/unknown counts; затем 11Б.3.5.4 форма/consumers.
+
+Завершён 11Б.3.5.3.2: strict upstream catalog, nullable ASN/community counts, unknown «—» вместо 0. Parser/aggregation/HTTP/JWT/build/typecheck/lint и provider/counts E2E прошли; locator inline details исправлен. Реальный Evolution/PG не принят. Далее 11Б.3.5.4.1 — форма Evolution dirty/rights/lock/key clear/source.
diff --git a/docs/ux-ui-progress.md b/docs/ux-ui-progress.md
index 33036c1e..f95607ce 100644
--- a/docs/ux-ui-progress.md
+++ b/docs/ux-ui-progress.md
@@ -28,7 +28,7 @@
 | 9 | VPN, Firewall и Filters | Завершён в границах локальной приёмки 2026-09-30; блоки 9.1–9.64, ограничения в 9.64 |
 | 10 | Маршрутизация, диагностика, карта и терминал | Завершён в границах локальной приёмки 2026-10-01; блоки 10.1–10.71, внешние ограничения в 10.71 |
 | 11А | Пользователи, контейнеры, сертификаты и резервные копии | Завершён в границах локальной приёмки 2026-10-01; 11А.1–11А.33, внешние ограничения в 11А.33 |
-| 11Б | Оповещения, сбор данных, интеграции, релизы и настройки | В работе: 11Б.1–11Б.3.5.3.1; scheduler и GeoIP приняты локально; NetFlow принят локально; далее Evolution и общие settings |
+| 11Б | Оповещения, сбор данных, интеграции, релизы и настройки | В работе: 11Б.1–11Б.3.5.3.2; scheduler и GeoIP приняты локально; NetFlow принят локально; далее Evolution и общие settings |
 | 12 | Итоговая доступность, адаптивность, производительность и регрессия | Не начат |
 
 
@@ -36,6 +36,13 @@
 
 
 
+## Блок 11Б.3.5.3.2 — достоверность каталога Evolution (2026-10-03)
+
+- Backend проверяет все пять upstream collections/items, обязательные поля, уникальность идентификаторов, диапазон ASN и целые безопасные counts до mapping. Malformed больше не превращается в подтверждённый пустой каталог; корректные пустые массивы допустимы. Неизвестный prefix_count (нет поля/null) сохраняется как null; итог community с таким ASN тоже unknown, известный ноль остаётся 0. Переполнение суммы отклоняется.
+- Nullable counts проведены через frontend parser/types, ReUI ASN/communities grids, поиск и детали; unknown выводится «—», локальный подтверждённый serverCount остаётся числом.
+- 4 backend parser/aggregation tests, существующие Evolution HTTP/JWT, 4 frontend parser tests, backend build, общий typecheck и профильный lint прошли. 8 provider E2E прошли; новый counts E2E проверил ASN/community zero/unknown и детали после уточнения locator (детали — inline panel, не dialog).
+- Реальный Evolution/PG не проверен; соответствие optional upstream полей требует внешней приёмки. Форма и live mock fallback ещё не приняты. Следующий блок 11Б.3.5.4.1 — отдельная форма с dirty-only сохранением, правами, lock, подтверждением удаления ключа и source guards.
+
 ## Блок 11Б.3.5.3.1 — Evolution provider и свежесть (2026-10-03)
 
 - Provider подключил strict settings/save/test helpers. GET error/malformed не становится settingsLoaded; settings и catalog имеют независимые loading/error/browser receivedAt. Catalog failure сохраняет последнее snapshot/time; отключение/смена сохранённого URL/secret flag и запись ключа инвалидируют прежний каталог. Save заканчивается по receipt до независимого запроса каталога.
diff --git a/docs/ux-ui-stage-11b.md b/docs/ux-ui-stage-11b.md
index cedb63c3..6f0fee1d 100644
--- a/docs/ux-ui-stage-11b.md
+++ b/docs/ux-ui-stage-11b.md
@@ -204,3 +204,5 @@ ReUI PRO/base-nova; существующие Frame, Data Grid v9, KpiStatGrid, S
 Завершён 11Б.3.5.2: Evolution backend selective RETURNING save/public receipt и проверка items upstream/test; DI HTTP/JWT, backend build/lint прошли. Старый provider совместим с публичными полями, ещё не мигрирован. Далее 11Б.3.5.3 — provider known/error/time/source; затем форма и upstream catalog validation.
 
 Завершён 11Б.3.5.3.1: Evolution provider known/error/time/readers/source/strict receipts, статус Settings; 8 provider (один selector повторён), 2 прежних и 6 source E2E, lint/typecheck/production build прошли. Форма/consumer mocks ещё не приняты. Далее 11Б.3.5.3.2 — upstream catalog strict/unknown counts; затем 11Б.3.5.4 форма/consumers.
+
+Завершён 11Б.3.5.3.2: strict upstream catalog, nullable ASN/community counts, unknown «—» вместо 0. Parser/aggregation/HTTP/JWT/build/typecheck/lint и provider/counts E2E прошли; locator inline details исправлен. Реальный Evolution/PG не принят. Далее 11Б.3.5.4.1 — форма Evolution dirty/rights/lock/key clear/source.
diff --git a/lib/data.ts b/lib/data.ts
index ba5b051a..b39150ca 100644
--- a/lib/data.ts
+++ b/lib/data.ts
@@ -134,7 +134,7 @@ export interface Asn {
   asn: string
   org: string
   country: string
-  prefixes: number
+  prefixes: number | null
   filter: string
   updated: string
   enabled: boolean
diff --git a/lib/evobgp-catalog.test.ts b/lib/evobgp-catalog.test.ts
index d04d61c4..f62c09c5 100644
--- a/lib/evobgp-catalog.test.ts
+++ b/lib/evobgp-catalog.test.ts
@@ -15,3 +15,17 @@ test("ASN and community zero counts are preserved, invalid counts rejected", ()
  assert.equal(parseEvoBgpCatalog({ ...empty, asns: [asn] }).asns[0].prefixes, 0)
  assert.throws(() => parseEvoBgpCatalog({ ...empty, asns: [{ ...asn, prefixes: -1 }] }))
 })
+
+
+test("unknown counts stay nullable and differ from confirmed zero", () => {
+ const asn = { id: "asn-unknown", asn: "AS64512", org: "", country: "", prefixes: null, filter: "", updated: "—", enabled: true }
+ const community = { id: "c", value: "64512:1", name: "c", description: "", type: "custom", filterIds: [], serverCount: 0, prefixCount: null, action: "permit", enabled: true }
+ const result = parseEvoBgpCatalog({...empty, asns:[asn], communities:[community]})
+ assert.equal(result.asns[0].prefixes,null)
+ assert.equal(result.communities[0].prefixCount,null)
+ assert.equal(result.communities[0].serverCount,0)
+ for(const value of [undefined,-1,1.5,Number.MAX_SAFE_INTEGER+1]) {
+  assert.throws(()=>parseEvoBgpCatalog({...empty,asns:[{...asn,prefixes:value}]}))
+  assert.throws(()=>parseEvoBgpCatalog({...empty,communities:[{...community,prefixCount:value}]}))
+ }
+})
diff --git a/lib/evobgp-catalog.ts b/lib/evobgp-catalog.ts
index d1e6063c..561c4ca5 100644
--- a/lib/evobgp-catalog.ts
+++ b/lib/evobgp-catalog.ts
@@ -12,8 +12,8 @@ const schema = z.object({
   modules: unique(z.object({ id, name: text, type: text })),
   domains: unique(z.object({ ...base, domain: text, resolvedIp: text })),
   ipRanges: unique(z.object({ ...base, cidr: text, country: text })),
-  asns: unique(z.object({ id, asn: text, org: text, country: text, prefixes: count, filter: text, updated: text, enabled: z.boolean() })),
-  communities: unique(z.object({ id, value: text, name: text, description: text, type: z.enum(["standard", "no-export", "no-advertise", "local-as", "custom"]), filterIds: z.array(text), serverCount: count, prefixCount: count, action: z.enum(["permit", "deny", "local-pref", "metric"]), actionValue: z.number().finite().optional(), enabled: z.boolean() })),
+  asns: unique(z.object({ id, asn: text, org: text, country: text, prefixes: count.nullable(), filter: text, updated: text, enabled: z.boolean() })),
+  communities: unique(z.object({ id, value: text, name: text, description: text, type: z.enum(["standard", "no-export", "no-advertise", "local-as", "custom"]), filterIds: z.array(text), serverCount: count, prefixCount: count.nullable(), action: z.enum(["permit", "deny", "local-pref", "metric"]), actionValue: z.number().finite().optional(), enabled: z.boolean() })),
 })
 export function parseEvoBgpCatalog(raw: unknown): EvoBgpCatalogSnapshot {
   const parsed = schema.safeParse(raw)
diff --git a/lib/evobgp-context.tsx b/lib/evobgp-context.tsx
index 18c3c97c..e66eb881 100644
--- a/lib/evobgp-context.tsx
+++ b/lib/evobgp-context.tsx
@@ -16,7 +16,7 @@ export interface EvoBgpCommunityRow {
   type: "standard" | "no-export" | "no-advertise" | "local-as" | "custom"
   filterIds: string[]
   serverCount: number
-  prefixCount: number
+  prefixCount: number | null
   action: "permit" | "deny" | "local-pref" | "metric"
   actionValue?: number
   enabled: boolean
diff --git a/tests/e2e/evobgp-counts.spec.ts b/tests/e2e/evobgp-counts.spec.ts
new file mode 100644
index 00000000..57b49f27
--- /dev/null
+++ b/tests/e2e/evobgp-counts.spec.ts
@@ -0,0 +1,21 @@
+import {test,expect} from "@playwright/test"
+import {evoSettings,evoCatalog} from "./fixtures/evobgp"
+
+test("Evolution: unknown prefix counts are distinct from confirmed zero in grids and details",async({page})=>{
+ const asn={id:"a",asn:"AS64512",org:"Unknown prefixes",country:"—",prefixes:null,filter:"c",updated:"сейчас",enabled:true}
+ const community={id:"c",value:"64512:1",name:"Unknown routes",description:"",type:"custom",filterIds:[],serverCount:0,prefixCount:null,action:"permit",enabled:true}
+ const catalog={...evoCatalog,asns:[asn,{...asn,id:"zero",asn:"AS64513",org:"Zero prefixes",prefixes:0}],communities:[community,{...community,id:"zero",value:"64512:2",name:"Zero routes",prefixCount:0}]}
+ await page.route("**/health",r=>r.fulfill({json:{ok:true}}))
+ await page.route("**/api/**",r=>{const path=new URL(r.request().url()).pathname;return r.fulfill(path==="/api/auth/config"?{json:{required:false}}:path==="/api/evobgp/settings"?{json:evoSettings}:path==="/api/evobgp/catalog"?{json:catalog}:{status:503,json:{error:"outside fixture"}})})
+ await page.goto("/asns")
+ const unknown=page.getByRole("row").filter({hasText:"AS64512"}),zero=page.getByRole("row").filter({hasText:"AS64513"})
+ await expect(unknown.getByRole("cell").nth(2)).toHaveText("—")
+ await expect(zero.getByRole("cell").nth(2)).toHaveText("0")
+ await page.locator('a[href="/communities"]').first().click()
+ const unknownCommunity=page.getByRole("row").filter({hasText:"Unknown routes"}),zeroCommunity=page.getByRole("row").filter({hasText:"Zero routes"})
+ await expect(unknownCommunity).toBeVisible()
+ await expect(unknownCommunity.getByRole("cell").filter({hasText:/^—$/})).toHaveCount(1)
+ await expect(zeroCommunity.getByRole("cell").filter({hasText:/^0$/})).toHaveCount(2)
+ await unknownCommunity.click()
+ await expect(page.getByText("Маршрутов",{exact:true}).locator("..").getByText("—",{exact:true})).toBeVisible()
+})