Routing security
AS25538 IN-ULM
Unclassified RIPE Non-Profit
Announcements
What this network originates
Every prefix observed with AS25538 as its origin, checked against RPKI and the IRR. Problems sort first.
| Prefix | RPKI | IRR | Vantage points |
|---|---|---|---|
| 91.210.72.0/22 | RPKI valid | IRR | 53 |
| 193.110.90.0/24 | RPKI valid | IRR | 53 |
| 217.10.0.0/20 | RPKI valid | IRR | 53 |
| 2001:1410::/32 | RPKI valid | IRR | 33 |
RPKI · ROAs
Route origin authorisations
Signed statements by address holders that AS25538 may originate these prefixes, up to the maximum length shown.
| Prefix | Max length | Trust anchor |
|---|---|---|
| 45.12.171.0/24 | /24 | RIPENCC |
| 91.210.72.0/22 | /22 | RIPENCC |
| 193.110.90.0/24 | /24 | RIPENCC |
| 217.10.0.0/20 | /20 | RIPENCC |
| 2001:1410::/32 | /32 | 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 |
|---|---|---|---|
| AS553 | Universitaet Stuttgart | Declared | not observed |
| AS6939 | Hurricane Electric LLC | Declared | Observed |
| AS41051 | Openfactory GmbH | Declared | Observed |
| AS48284 | SWU TeleNet GmbH | 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 AS25538 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 |
|---|---|---|---|---|---|
| 45.12.171.0/24 | RIPE | Temporaerhaus | FIBERGARDEN-MNT | 2026-03-27 | Not announced |
| 91.210.72.0/22 | RIPE | Internet Ulm/Neu-Ulm e.V. | BN-ULM | 2018-09-13 | Announced |
| 193.110.90.0/24 | RIPE | PI-NET | BN-ULM | 2003-11-03 | Announced |
| 217.10.0.0/20 | RIPE | Internet Ulm/Neu-Ulm e.V. | BN-ULM | 2003-03-01 | Announced |
| 2001:1410::/32 | RIPE | Internet Ulm/Neu-Ulm e.V. | BN-ULM | 2005-12-20 | Announced |
IRR
AS-sets
The as-set is what upstreams expand to build this network's customer filter. Sets that list AS25538 directly show who expects to carry it.
| AS-set | Where | Relationship |
|---|---|---|
AS-HURRICANEV6 | RADB | Lists AS25538 as a direct member |
AS-IN-ULM | RIPE | Lists AS25538 as a direct member |
AS-RETN-ACTUAL-V6 | RIPE | Lists AS25538 as a direct member |
AS-SWUTN | RIPE | Lists AS25538 as a direct member |
AS-VT-TRANSIT | RIPE | Lists AS25538 as a direct member |
AS174:AS-COGC-033 | RADB | Lists AS25538 as a direct member |
AS41051:AS-PARTICIPANTS | RIPE | Lists AS25538 as a direct member |
RPKI from rpki-client, validated 2026-10-15 12:09 UTC. IRR from ARIN, RADB, RIPE, ALTDB, APNIC, LACNIC, NTTCOM, AFRINIC, collected 2026-10-15. Cross-check on bgp.he.net.