Routing security
AS4901 CAAREN
Education ARIN
Announcements
What this network originates
Every prefix observed with AS4901 as its origin, checked against RPKI and the IRR. Problems sort first.
| Prefix | RPKI | IRR | Vantage points |
|---|---|---|---|
| 162.250.136.0/22 | RPKI valid | IRR | 54 |
| 2620:118:5000::/44 | RPKI valid | IRR | 32 |
RPKI · ROAs
Route origin authorisations
Signed statements by address holders that AS4901 may originate these prefixes, up to the maximum length shown.
| Prefix | Max length | Trust anchor |
|---|---|---|
| 162.250.136.0/22 | /22 | ARIN |
| 2620:118:5000::/44 | /44 | ARIN |
ROA-based and RPKI-valid-only prefix lists for routers are on asn.ipinfo.app.
RPKI · ASPA
Declared transit providers
This network has signed an ASPA record naming its transit providers. Each is compared against the upstreams observed in routing paths.
| AS | Network | ASPA | Routing paths |
|---|---|---|---|
| AS6079 | RCN | Declared | Observed |
| AS10886 | University of Maryland | Declared | Observed |
| AS11164 | Internet2 | Declared | Observed |
| AS11537 | Internet2 | Declared | Observed |
An observed upstream that is not declared is not necessarily a leak: our upstream inference cannot tell a transit provider from a peer seen in the same position. A declared provider that is never observed is usually a backup path.
IRR
Registered route objects
Route objects naming AS4901 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 |
|---|---|---|---|---|---|
| 162.250.136.0/22 | ARIN | CAAREN IPv4 | MNT-GWU-5 | 2017-12-18 | Announced |
| 2620:118:5000::/44 | ARIN | CAAREN IPv6 | MNT-GWU-5 | 2017-12-18 | Announced |
IRR
AS-sets
The as-set is what upstreams expand to build this network's customer filter. Sets that list AS4901 directly show who expects to carry it.
| AS-set | Where | Relationship |
|---|---|---|
AS-HURRICANEV6 | RADB | Lists AS4901 as a direct member |
AS-PROLITE | RIPE | Lists AS4901 as a direct member |
AS-RCN-CUSTOMER | RADB | Lists AS4901 as a direct member |
AS10886:AS-ALL | RADB | Lists AS4901 as a direct member |
AS4901:AS-INTERNAL | ARIN | Lists AS4901 as a direct member |
RPKI from rpki-client, validated 2026-10-19 12:02 UTC. IRR from ARIN, RADB, RIPE, ALTDB, APNIC, LACNIC, NTTCOM, AFRINIC, collected 2026-10-19. Cross-check on bgp.he.net.