Network · data from 2026-11-12
AS5517 CSL CSL Computer Service Langenbach GmbH
Registry name: CSL CSL Computer Service Langenbach GmbH, DE · not in PeeringDB
Announced routes
Every prefix a peer of the route collectors sees with origin AS5517, things to look at first. Visibility = full-table peers that see it, of 673 (IPv4) and 636 (IPv6) on 75 collectors. Also as routes.csv.
| 159.25.0.0/16 | Valid | RIR databaseRIPE | 673 100% |
| 194.176.0.0/19 | Valid | RIR databaseRIPE | 673 100% |
| 194.245.0.0/16 | Valid | RIR databaseRIPE | 673 100% |
| 2a01:4fc0::/34 | Valid | RIR databaseRIPE | 635 100% |
AS-SET
AS5517 isn't in PeeringDB, where networks name their AS-SET.
Fix list
The changes that would bring RPKI, the IRR and what's announced into line. Some are deliberate (a route object kept for a backup route, say); the network decides. All 11 are in fix.csv.
- Route object: not announced11
Route objects not announced
Route objects with origin AS5517 whose prefix no peer sees AS5517 announce. Many are kept on purpose (backup routes, space announced only in some places).
| 159.25.255.0/24 | RIPE | Valid |
| 194.180.79.0/24 | RIPE | No ROA |
| 194.245.158.0/24 | RIPE | Invalid: maxLength |
| 194.245.160.0/24 | RIPE | Invalid: maxLength |
| 194.245.248.0/21 | RIPE | Invalid: maxLength |
| 2a01:4fc0::/32 | RIPE | Valid |
| 2a01:4fc0:1000::/48 | RIPE | Valid |
| 2a01:4fc0:4000::/34 | RIPE | Valid |
| 2a01:4fc0:8000::/34 | RIPE | Valid |
| 2a01:4fc0:8000::/48 | RIPE | Valid |
| 2a01:4fc0:c000::/34 | RIPE | Valid |
Routes: the 08:00 UTC snapshots of 2026-11-12 from 75 RIPE RIS and RouteViews collectors. RPKI: our rpki-client run before the snapshot. IRR: the day's dumps of the five RIR databases and RADB's mirrors. The LEVEL3 and IDNIC databases publish no dump and aren't read, so route objects only there count as none.