Routing security
AS206218 AT4-AS at4.xyz
Unclassified RIPE
Announcements
What this network originates
Every prefix observed with AS206218 as its origin, checked against RPKI and the IRR. Problems sort first.
| Prefix | RPKI | IRR | Vantage points |
|---|---|---|---|
| 74.209.165.0/24 | RPKI valid | IRR | 52 |
| 2001:678:bc4::/48 | RPKI valid | IRR | 33 |
RPKI · ROAs
Route origin authorisations
Signed statements by address holders that AS206218 may originate these prefixes, up to the maximum length shown.
| Prefix | Max length | Trust anchor |
|---|---|---|
| 74.209.165.0/24 | /24 | RIPENCC |
| 2001:678:bc4::/48 | /48 | RIPENCC |
| 2a0a:6040:a00::/40 | /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 |
|---|---|---|---|
| AS8283 | Netwerkvereniging Coloclue | Declared | Observed |
| AS209845 | Jacob Willem de Vos | Declared | not 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 AS206218 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 |
|---|---|---|---|---|---|
| 74.209.165.0/24 | RIPE | — | AT4-MNT | 2025-12-28 | Announced |
| 2001:678:bc4::/48 | RIPE | — | AT4-MNT | 2025-10-13 | Announced |
IRR
AS-sets
The as-set is what upstreams expand to build this network's customer filter. Sets that list AS206218 directly show who expects to carry it.
| AS-set | Where | Relationship |
|---|---|---|
AS-RETN-ACTUAL-V4 | RIPE | Lists AS206218 as a direct member |
AS-RETN-ACTUAL-V6 | RIPE | Lists AS206218 as a direct member |
AS206218:AS-AT4 | RIPE | Lists AS206218 as a direct member |
AS213333:AS-CNPR | RIPE | Lists AS206218 as a direct member |
AS53667:AS-CUSTOMERS | RADB | Lists AS206218 as a direct member |
AS8283:AS-COLOCLUE | RIPE | Lists AS206218 as a direct member |
RPKI from rpki-client, validated 2026-10-20 11:55 UTC. IRR from ARIN, RADB, RIPE, ALTDB, APNIC, LACNIC, NTTCOM, AFRINIC, collected 2026-10-20. Cross-check on bgp.he.net.