Network · data from 2026-11-12
AS21787 CERIDIAN - CERIDIAN
Registry name: CERIDIAN - CERIDIAN, US · not in PeeringDB
Announced routes
Every prefix a peer of the route collectors sees with origin AS21787, 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.
| 170.153.96.0/22 | No ROA | Nonecovered by 170.153.0.0/17 | 673 100% |
| 170.153.97.0/24 | No ROA | Nonecovered by 170.153.0.0/17 | 673 100% |
| 170.153.98.0/24 | No ROA | Nonecovered by 170.153.0.0/17 | 673 100% |
| 170.153.141.0/24 | No ROA | Nonecovered by 170.153.140.0/22 | 673 100% |
| 170.153.142.0/24 | No ROA | Nonecovered by 170.153.140.0/22 | 673 100% |
| 170.153.4.0/24 | No ROA | Other IRR onlyRADB | 673 100% |
| 170.153.140.0/22 | No ROA | Other IRR onlyRADB | 673 100% |
| 170.153.144.0/24 | No ROA | Other IRR onlyRADB | 673 100% |
AS-SET
AS21787 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 28 are in fix.csv.
- ROA: none8
- Route object: none5
- Route object: RIR3
- Route object: not announced12
| Change | Prefix or set | Detail |
|---|---|---|
| ROA: none | 170.153.96.0/22 | No ROA covers it. Add a ROA for AS21787, maxLength 22. |
| Route object: none | 170.153.96.0/22 | No route object for it. A route object for 170.153.0.0/17 with origin AS21787 covers it (filters allowing more-specifics accept it). Add a route object with origin AS21787 in the RIR database for the space. |
| ROA: none | 170.153.97.0/24 | No ROA covers it. Add a ROA for AS21787, maxLength 24. |
| Route object: none | 170.153.97.0/24 | No route object for it. A route object for 170.153.0.0/17 with origin AS21787 covers it (filters allowing more-specifics accept it). Add a route object with origin AS21787 in the RIR database for the space. |
| ROA: none | 170.153.98.0/24 | No ROA covers it. Add a ROA for AS21787, maxLength 24. |
| Route object: none | 170.153.98.0/24 | No route object for it. A route object for 170.153.0.0/17 with origin AS21787 covers it (filters allowing more-specifics accept it). Add a route object with origin AS21787 in the RIR database for the space. |
| ROA: none | 170.153.141.0/24 | No ROA covers it. Add a ROA for AS21787, maxLength 24. |
| Route object: none | 170.153.141.0/24 | No route object for it. A route object for 170.153.140.0/22 with origin AS21787 covers it (filters allowing more-specifics accept it). Add a route object with origin AS21787 in the RIR database for the space. |
| ROA: none | 170.153.142.0/24 | No ROA covers it. Add a ROA for AS21787, maxLength 24. |
| Route object: none | 170.153.142.0/24 | No route object for it. A route object for 170.153.140.0/22 with origin AS21787 covers it (filters allowing more-specifics accept it). Add a route object with origin AS21787 in the RIR database for the space. |
| ROA: none | 170.153.4.0/24 | No ROA covers it. Add a ROA for AS21787, maxLength 24. |
| Route object: RIR | 170.153.4.0/24 | Route object only in RADB. Add it in the RIR database for the space. |
| ROA: none | 170.153.140.0/22 | No ROA covers it. Add a ROA for AS21787, maxLength 22. |
| Route object: RIR | 170.153.140.0/22 | Route object only in RADB. Add it in the RIR database for the space. |
| ROA: none | 170.153.144.0/24 | No ROA covers it. Add a ROA for AS21787, maxLength 24. |
| Route object: RIR | 170.153.144.0/24 | Route object only in RADB. Add it in the RIR database for the space. |
Route objects not announced
Route objects with origin AS21787 whose prefix no peer sees AS21787 announce. Many are kept on purpose (backup routes, space announced only in some places).
| 170.153.0.0/16 | RADB | No ROA |
| 170.153.0.0/17 | RADB | No ROA |
| 170.153.0.0/24 | RADB | No ROA |
| 170.153.133.0/28 | RADB | No ROA |
| 170.153.138.0/23 | RADB | No ROA |
| 170.153.144.0/20 | RADB | No ROA |
| 170.153.146.0/24 | RADB | No ROA |
| 170.153.160.0/19 | RADB | No ROA |
| 170.153.192.0/18 | RADB | No ROA |
| 170.153.196.0/22 | RADB | No ROA |
| 170.153.212.0/22 | RADB | No ROA |
| 170.153.216.0/21 | 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.