Routing security
AS28521 AS28521 - AT&T COMUNICACIONES DIGITALES S DE RL
Unclassified RIPE
Announcements
What this network originates
Every prefix observed with AS28521 as its origin, checked against RPKI and the IRR. Problems sort first.
| Prefix | RPKI | IRR | Vantage points |
|---|---|---|---|
| 201.130.56.0/23 | No ROA | IRR covering | 54 |
| 201.130.56.0/24 | No ROA | IRR | 52 |
RPKI · ROAs
Route origin authorisations
Signed statements by address holders that AS28521 may originate these prefixes, up to the maximum length shown.
No ROA names this AS as an authorised origin.
ROA-based and RPKI-valid-only prefix lists for routers are on asn.ipinfo.app.
RPKI · ASPA
Declared transit providers
No ASPA record This network has not published an ASPA object. ASPA lets a network sign the list of its transit providers, so routers can reject paths that route through anyone else (route leaks). Only a few thousand networks publish one so far, so its absence is normal.
IRR
Registered route objects
Route objects naming AS28521 as origin, across RADb, the RIR registries, ALTDB and NTTCOM. Objects that are registered but not announced come first: a stale object lets anyone who can spoof this origin through an IRR-built filter.
| Prefix | Source | Description | Maintainer | Changed | Routing |
|---|---|---|---|---|---|
| 187.254.0.0/16 | RADB | Customer Cablemas | MAINT-AS32098 | 2024-07-24 | Not announced |
| 201.130.32.0/19 | RADB | Proxy-registered route object | MAINT-AS3491 | 2025-03-28 | Not announced |
| 201.130.32.0/21 | RADB | Proxy-registered route object | MAINT-AS3491 | 2025-03-28 | Not announced |
| 201.130.47.0/24 | RADB | Proxy-registered route object | MAINT-AS3491 | 2025-03-28 | Not announced |
| 201.130.57.0/24 | RADB | Proxy-registered route object | MAINT-AS3491 | 2025-03-28 | Not announced |
| 201.130.56.0/24 | RADB | auto-generated route object for 201.130.56.0/24 | MAINT-AS11172 | 2023-11-13 | Announced |
IRR
AS-sets
The as-set is what upstreams expand to build this network's customer filter. Sets that list AS28521 directly show who expects to carry it.
| AS-set | Where | Relationship |
|---|---|---|
AS-32098 | RADB | Lists AS28521 as a direct member |
AS-ALESTRA | RADB | Lists AS28521 as a direct member |
AS-BESTEL-NET | RADB | Lists AS28521 as a direct member |
AS28438:AS-CONE | RADB | Lists AS28521 as a direct member |
AS3491:AS-CUSTOMERS-NA | RADB | Lists AS28521 as a direct member |
AS394684:AS-ALL | RADB | Lists AS28521 as a direct member |
RPKI from rpki-client, validated 2026-11-02 13:01 UTC. IRR from ARIN, RADB, RIPE, ALTDB, APNIC, LACNIC, NTTCOM, AFRINIC, collected 2026-11-02. Cross-check on bgp.he.net.