diff --git a/internal/repository/module_snapshot.go b/internal/repository/module_snapshot.go
index ffe8aa1..540a04b 100644
--- a/internal/repository/module_snapshot.go
+++ b/internal/repository/module_snapshot.go
@@ -12,16 +12,24 @@ import (
 	"github.com/jackc/pgx/v5"
 )
 
+func moduleSnapshotRowTableExists(ctx context.Context, q queryRower) bool {
+	var n int
+	err := q.QueryRow(ctx, `
+		SELECT 1 FROM information_schema.tables
+		WHERE table_schema = 'public' AND table_name = 'module_prefix_snapshot_row'
+		LIMIT 1`).Scan(&n)
+	return err == nil
+}
+
 func (p *Postgres) GetModulePrefixSnapshot(tenantID, moduleID string) (*store.ModulePrefixSnapshot, bool, error) {
 	ctx := context.Background()
 	var inputHash string
 	var collectedAt time.Time
-	var raw []byte
 	err := p.pool.QueryRow(ctx, `
-		SELECT input_hash, collected_at, prefixes_json
+		SELECT input_hash, collected_at
 		FROM module_prefix_snapshot
 		WHERE tenant_id = $1 AND module_id = $2`,
-		tenantID, moduleID).Scan(&inputHash, &collectedAt, &raw)
+		tenantID, moduleID).Scan(&inputHash, &collectedAt)
 	if err != nil {
 		if errors.Is(err, pgx.ErrNoRows) {
 			return nil, false, nil
@@ -29,9 +37,31 @@ func (p *Postgres) GetModulePrefixSnapshot(tenantID, moduleID string) (*store.Mo
 		return nil, false, err
 	}
 	var prefixes []store.PrefixRow
-	if len(raw) > 0 {
-		if err := json.Unmarshal(raw, &prefixes); err != nil {
-			return nil, false, err
+	if moduleSnapshotRowTableExists(ctx, p.pool) {
+		rows, qerr := p.pool.Query(ctx, `
+			SELECT prefix::text, community_id::text, source
+			FROM module_prefix_snapshot_row
+			WHERE tenant_id = $1::uuid AND module_id = $2::uuid
+			ORDER BY ord`, tenantID, moduleID)
+		if qerr != nil {
+			return nil, false, qerr
+		}
+		defer rows.Close()
+		for rows.Next() {
+			var pr store.PrefixRow
+			var comm *string
+			if err := rows.Scan(&pr.Prefix, &comm, &pr.Source); err != nil {
+				continue
+			}
+			pr.CommunityID = comm
+			prefixes = append(prefixes, pr)
+		}
+	} else {
+		var raw []byte
+		if err := p.pool.QueryRow(ctx, `
+			SELECT prefixes_json FROM module_prefix_snapshot
+			WHERE tenant_id = $1 AND module_id = $2`, tenantID, moduleID).Scan(&raw); err == nil && len(raw) > 0 {
+			_ = json.Unmarshal(raw, &prefixes)
 		}
 	}
 	return &store.ModulePrefixSnapshot{
@@ -45,20 +75,57 @@ func (p *Postgres) SetModulePrefixSnapshot(tenantID, moduleID, inputHash string,
 	if strings.TrimSpace(tenantID) == "" || strings.TrimSpace(moduleID) == "" || strings.TrimSpace(inputHash) == "" {
 		return store.ErrInvalidInput
 	}
-	raw, err := json.Marshal(prefixes)
+	ctx := context.Background()
+	tx, err := p.pool.Begin(ctx)
 	if err != nil {
 		return err
 	}
-	ctx := context.Background()
-	_, err = p.pool.Exec(ctx, `
-		INSERT INTO module_prefix_snapshot (tenant_id, module_id, input_hash, collected_at, prefixes_json)
-		VALUES ($1::uuid, $2::uuid, $3, now(), $4::jsonb)
+	defer func() { _ = tx.Rollback(ctx) }()
+	_, err = tx.Exec(ctx, `
+		INSERT INTO module_prefix_snapshot (tenant_id, module_id, input_hash, collected_at)
+		VALUES ($1::uuid, $2::uuid, $3, now())
 		ON CONFLICT (tenant_id, module_id) DO UPDATE SET
 			input_hash = EXCLUDED.input_hash,
-			collected_at = EXCLUDED.collected_at,
-			prefixes_json = EXCLUDED.prefixes_json`,
-		tenantID, moduleID, inputHash, string(raw))
-	return err
+			collected_at = EXCLUDED.collected_at`,
+		tenantID, moduleID, inputHash)
+	if err != nil {
+		return err
+	}
+	if moduleSnapshotRowTableExists(ctx, tx) {
+		if _, err := tx.Exec(ctx, `
+			DELETE FROM module_prefix_snapshot_row
+			WHERE tenant_id = $1::uuid AND module_id = $2::uuid`, tenantID, moduleID); err != nil {
+			return err
+		}
+		for i, pr := range prefixes {
+			var comm any
+			if pr.CommunityID != nil && strings.TrimSpace(*pr.CommunityID) != "" {
+				comm = strings.TrimSpace(*pr.CommunityID)
+			}
+			src := pr.Source
+			if strings.TrimSpace(src) == "" {
+				src = "render"
+			}
+			if _, err := tx.Exec(ctx, `
+				INSERT INTO module_prefix_snapshot_row (tenant_id, module_id, ord, prefix, community_id, source)
+				VALUES ($1::uuid, $2::uuid, $3, $4::cidr, $5::uuid, $6)`,
+				tenantID, moduleID, i, strings.TrimSpace(pr.Prefix), comm, src); err != nil {
+				return err
+			}
+		}
+	} else {
+		raw, err := json.Marshal(prefixes)
+		if err != nil {
+			return err
+		}
+		if _, err := tx.Exec(ctx, `
+			UPDATE module_prefix_snapshot SET prefixes_json = $3::jsonb
+			WHERE tenant_id = $1::uuid AND module_id = $2::uuid`,
+			tenantID, moduleID, string(raw)); err != nil {
+			return err
+		}
+	}
+	return tx.Commit(ctx)
 }
 
 func (p *Postgres) DeleteModulePrefixSnapshot(tenantID, moduleID string) error {
diff --git a/migrations/postgres/000019_module_snapshot_rows.down.sql b/migrations/postgres/000019_module_snapshot_rows.down.sql
new file mode 100644
index 0000000..13c5814
--- /dev/null
+++ b/migrations/postgres/000019_module_snapshot_rows.down.sql
@@ -0,0 +1,16 @@
+ALTER TABLE module_prefix_snapshot ADD COLUMN prefixes_json JSONB NOT NULL DEFAULT '[]';
+
+UPDATE module_prefix_snapshot mps
+SET prefixes_json = COALESCE((
+    SELECT jsonb_agg(
+        jsonb_build_object(
+            'prefix', psr.prefix::text,
+            'community_id', psr.community_id,
+            'source', psr.source
+        ) ORDER BY psr.ord
+    )
+    FROM module_prefix_snapshot_row psr
+    WHERE psr.tenant_id = mps.tenant_id AND psr.module_id = mps.module_id
+), '[]'::jsonb);
+
+DROP TABLE IF EXISTS module_prefix_snapshot_row;
diff --git a/migrations/postgres/000019_module_snapshot_rows.up.sql b/migrations/postgres/000019_module_snapshot_rows.up.sql
new file mode 100644
index 0000000..72415f6
--- /dev/null
+++ b/migrations/postgres/000019_module_snapshot_rows.up.sql
@@ -0,0 +1,25 @@
+CREATE TABLE module_prefix_snapshot_row (
+    tenant_id     UUID NOT NULL,
+    module_id     UUID NOT NULL,
+    ord           INTEGER NOT NULL,
+    prefix        CIDR NOT NULL,
+    community_id  UUID,
+    source        TEXT NOT NULL DEFAULT '',
+    PRIMARY KEY (tenant_id, module_id, ord),
+    FOREIGN KEY (tenant_id, module_id)
+        REFERENCES module_prefix_snapshot (tenant_id, module_id) ON DELETE CASCADE
+);
+
+INSERT INTO module_prefix_snapshot_row (tenant_id, module_id, ord, prefix, community_id, source)
+SELECT mps.tenant_id,
+    mps.module_id,
+    (t.ordinality - 1)::int,
+    (t.elem->>'prefix')::cidr,
+    NULLIF(t.elem->>'community_id', '')::uuid,
+    COALESCE(NULLIF(t.elem->>'source', ''), '')
+FROM module_prefix_snapshot mps
+CROSS JOIN LATERAL jsonb_array_elements(mps.prefixes_json) WITH ORDINALITY AS t(elem, ordinality)
+WHERE jsonb_typeof(mps.prefixes_json) = 'array'
+  AND jsonb_array_length(mps.prefixes_json) > 0;
+
+ALTER TABLE module_prefix_snapshot DROP COLUMN prefixes_json;
diff --git a/migrations/sqlite/000019_module_snapshot_rows.down.sql b/migrations/sqlite/000019_module_snapshot_rows.down.sql
new file mode 100644
index 0000000..c651313
--- /dev/null
+++ b/migrations/sqlite/000019_module_snapshot_rows.down.sql
@@ -0,0 +1,2 @@
+ALTER TABLE module_prefix_snapshot ADD COLUMN prefixes_json TEXT NOT NULL DEFAULT '[]';
+DROP TABLE IF EXISTS module_prefix_snapshot_row;
diff --git a/migrations/sqlite/000019_module_snapshot_rows.up.sql b/migrations/sqlite/000019_module_snapshot_rows.up.sql
new file mode 100644
index 0000000..c4f0b0f
--- /dev/null
+++ b/migrations/sqlite/000019_module_snapshot_rows.up.sql
@@ -0,0 +1,13 @@
+CREATE TABLE module_prefix_snapshot_row (
+    tenant_id     TEXT NOT NULL,
+    module_id     TEXT NOT NULL,
+    ord           INTEGER NOT NULL,
+    prefix        TEXT NOT NULL,
+    community_id  TEXT,
+    source        TEXT NOT NULL DEFAULT '',
+    PRIMARY KEY (tenant_id, module_id, ord),
+    FOREIGN KEY (tenant_id, module_id)
+        REFERENCES module_prefix_snapshot (tenant_id, module_id) ON DELETE CASCADE
+);
+
+ALTER TABLE module_prefix_snapshot DROP COLUMN prefixes_json;