Routing security
AS203757 CZUBAYKO
Unclassified RIPE Educational/Research
Announcements
What this network originates
Every prefix observed with AS203757 as its origin, checked against RPKI and the IRR. Problems sort first.
| Prefix | RPKI | IRR | Vantage points |
|---|---|---|---|
| 2001:67c:7d0::/48 | RPKI valid | IRR | 30 |
RPKI · ROAs
Route origin authorisations
Signed statements by address holders that AS203757 may originate these prefixes, up to the maximum length shown.
| Prefix | Max length | Trust anchor |
|---|---|---|
| 2001:67c:7d0::/48 | /48 | RIPENCC |
| 2a0f:85c1:d9f::/48 | /48 | RIPENCC |
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 |
|---|---|---|---|
| AS41108 | comtrance service GmbH | Declared | not observed |
| AS204680 | Karlsruhe Institute of Technology | 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 AS203757 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 |
|---|---|---|---|---|---|
| 2a0f:85c1:d9f::/48 | RIPE | — | KLEGUL-MNT | 2026-03-21 | Not announced |
| 2001:67c:7d0::/48 | RIPE | — | KLEGUL-MNT | 2026-07-12 | Announced |
IRR
AS-sets
The as-set is what upstreams expand to build this network's customer filter. Sets that list AS203757 directly show who expects to carry it.
| AS-set | Where | Relationship |
|---|---|---|
AS-FIRSTROOT | RIPE | Lists AS203757 as a direct member |
AS-KIT-STUDENT | RIPE | Lists AS203757 as a direct member |
AS203757:AS-KLEGUL | RIPE | Lists AS203757 as a direct member |
RPKI from rpki-client, validated 2026-10-26 12:04 UTC. IRR from ARIN, RADB, RIPE, ALTDB, APNIC, LACNIC, NTTCOM, AFRINIC, collected 2026-10-26. Cross-check on bgp.he.net.