Network · data from 2026-11-12
AS18438 BROWNB - Brown Brothers Harriman & Company
Registry name: BROWNB - Brown Brothers Harriman & Company, US · not in PeeringDB
Announced routes
Every prefix a peer of the route collectors sees with origin AS18438, things to look at first. Visibility = full-table peers that see it, of 673 (IPv4) and 636 (IPv6) on 75 collectors. Also as routes.csv.
| 204.136.20.0/24 | No ROA | Other origin only | 672 100% |
| 204.136.19.0/24 | No ROA | Other IRR onlyALTDB | 673 100% |
| 204.136.25.0/24 | No ROA | Other IRR onlyRADB | 673 100% |
| 204.136.29.0/24 | No ROA | Other IRR onlyRADB | 673 100% |
| 204.136.31.0/24 | No ROA | Other IRR onlyRADB | 673 100% |
| 192.200.3.0/24 | No ROA | Other IRR onlyRADB | 672 100% |
| 192.200.6.0/24 | No ROA | Other IRR onlyRADB | 672 100% |
| 192.200.7.0/24 | No ROA | Other IRR onlyRADB | 672 100% |
| 204.136.23.0/24 | No ROA | Other IRR onlyRADB | 672 100% |
| 204.136.16.0/24 | No ROA | RIR databaseARIN | 673 100% |
| 204.136.24.0/24 | No ROA | RIR databaseARIN, RADB | 673 100% |
| 192.200.1.0/24 | No ROA | RIR databaseARIN, RADB | 672 100% |
| 192.200.2.0/24 | No ROA | RIR databaseARIN, RADB | 672 100% |
| 192.200.5.0/24 | No ROA | RIR databaseARIN, RADB | 672 100% |
| 192.200.8.0/24 | No ROA | RIR databaseARIN, RADB | 672 100% |
| 204.136.26.0/24 | No ROA | RIR databaseARIN, RADB | 672 100% |
| 204.136.27.0/24 | No ROA | RIR databaseARIN, RADB | 672 100% |
| 192.200.4.0/24 | Valid | RIR databaseARIN, RADB | 672 100% |
| 204.136.28.0/24 | Valid | RIR databaseARIN, RADB | 671 100% |
| 204.136.30.0/24 | Valid | RIR databaseARIN, RADB | 671 100% |
AS-SET
AS18438 isn't in PeeringDB, where networks name their AS-SET.
Fix list
The changes that would bring RPKI, the IRR and what's announced into line. Some are deliberate (a route object kept for a backup route, say); the network decides. All 34 are in fix.csv.
- ROA: none17
- Route object: none1
- Route object: RIR8
- Route object: not announced8
| Change | Prefix or set | Detail |
|---|---|---|
| ROA: none | 204.136.20.0/24 | No ROA covers it. Add a ROA for AS18438, maxLength 24. |
| Route object: none | 204.136.20.0/24 | Route objects for it name AS3300. Add a route object with origin AS18438 in the RIR database for the space. |
| ROA: none | 204.136.19.0/24 | No ROA covers it. Add a ROA for AS18438, maxLength 24. |
| Route object: RIR | 204.136.19.0/24 | Route object only in ALTDB. Add it in the RIR database for the space. |
| ROA: none | 204.136.25.0/24 | No ROA covers it. Add a ROA for AS18438, maxLength 24. |
| Route object: RIR | 204.136.25.0/24 | Route object only in RADB. Add it in the RIR database for the space. |
| ROA: none | 204.136.29.0/24 | No ROA covers it. Add a ROA for AS18438, maxLength 24. |
| Route object: RIR | 204.136.29.0/24 | Route object only in RADB. Add it in the RIR database for the space. |
| ROA: none | 204.136.31.0/24 | No ROA covers it. Add a ROA for AS18438, maxLength 24. |
| Route object: RIR | 204.136.31.0/24 | Route object only in RADB. Add it in the RIR database for the space. |
| ROA: none | 192.200.3.0/24 | No ROA covers it. Add a ROA for AS18438, maxLength 24. |
| Route object: RIR | 192.200.3.0/24 | Route object only in RADB. Add it in the RIR database for the space. |
| ROA: none | 192.200.6.0/24 | No ROA covers it. Add a ROA for AS18438, maxLength 24. |
| Route object: RIR | 192.200.6.0/24 | Route object only in RADB. Add it in the RIR database for the space. |
| ROA: none | 192.200.7.0/24 | No ROA covers it. Add a ROA for AS18438, maxLength 24. |
| Route object: RIR | 192.200.7.0/24 | Route object only in RADB. Add it in the RIR database for the space. |
| ROA: none | 204.136.23.0/24 | No ROA covers it. Add a ROA for AS18438, maxLength 24. |
| Route object: RIR | 204.136.23.0/24 | Route object only in RADB. Add it in the RIR database for the space. |
| ROA: none | 204.136.16.0/24 | No ROA covers it. Add a ROA for AS18438, maxLength 24. |
| ROA: none | 204.136.24.0/24 | No ROA covers it. Add a ROA for AS18438, maxLength 24. |
| ROA: none | 192.200.1.0/24 | No ROA covers it. Add a ROA for AS18438, maxLength 24. |
| ROA: none | 192.200.2.0/24 | No ROA covers it. Add a ROA for AS18438, maxLength 24. |
| ROA: none | 192.200.5.0/24 | No ROA covers it. Add a ROA for AS18438, maxLength 24. |
| ROA: none | 192.200.8.0/24 | No ROA covers it. Add a ROA for AS18438, maxLength 24. |
| ROA: none | 204.136.26.0/24 | No ROA covers it. Add a ROA for AS18438, maxLength 24. |
| ROA: none | 204.136.27.0/24 | No ROA covers it. Add a ROA for AS18438, maxLength 24. |
Route objects not announced
Route objects with origin AS18438 whose prefix no peer sees AS18438 announce. Many are kept on purpose (backup routes, space announced only in some places).
| 192.200.2.0/23 | RADB | No ROA |
| 192.200.4.0/23 | RADB | No ROA |
| 192.200.6.0/23 | RADB | No ROA |
| 204.136.17.0/24 | RADB | No ROA |
| 204.136.18.0/24 | RADB | No ROA |
| 204.136.24.0/23 | RADB | No ROA |
| 204.136.26.0/23 | RADB | No ROA |
| 204.136.28.0/23 | RADB | No ROA |
Routes: the 08:00 UTC snapshots of 2026-11-12 from 75 RIPE RIS and RouteViews collectors. RPKI: our rpki-client run before the snapshot. IRR: the day's dumps of the five RIR databases and RADB's mirrors. The LEVEL3 and IDNIC databases publish no dump and aren't read, so route objects only there count as none.