bgpreport

Network · data from 2026-11-12

AS2501 UTnet

Registry name: UTnet - The University of Tokyo, JP · PeeringDB

4IPv4 routes 0.0% RPKI valid · 100.0% with a route object
2IPv6 routes 0.0% RPKI valid · 100.0% with a route object
0RPKI invalid 0 origin · 0 maxLength
6No ROA 0 with no route object for this origin
0Low visibility seen by under 10% of full-table peers
1Route objects not announced registered with origin AS2501, seen from no peer

Announced routes

Every prefix a peer of the route collectors sees with origin AS2501, 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.
130.69.0.0/16 No ROA Other IRR onlyRADB 672 100% 69
133.11.0.0/16 No ROA Other IRR onlyJPIRR, RADB 672 100% 69
157.82.0.0/16 No ROA Other IRR onlyRADB 672 100% 69
192.51.208.0/20 No ROA Other IRR onlyRADB 672 100% 69
2404:d540::/32 No ROA Other IRR onlyRADB 634 100% 69
2404:d540:1::/48 No ROA Other IRR onlyRADB 634 100% 69

AS-SET

AS2501's PeeringDB record names no 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 13 are in fix.csv.

  • ROA: none6
  • Route object: RIR6
  • Route object: not announced1
ChangePrefix or setDetailFull-table peers
ROA: none130.69.0.0/16No ROA covers it. Add a ROA for AS2501, maxLength 16.672 of 673
Route object: RIR130.69.0.0/16Route object only in RADB. Add it in the RIR database for the space.672 of 673
ROA: none133.11.0.0/16No ROA covers it. Add a ROA for AS2501, maxLength 16.672 of 673
Route object: RIR133.11.0.0/16Route object only in JPIRR, RADB. Add it in the RIR database for the space.672 of 673
ROA: none157.82.0.0/16No ROA covers it. Add a ROA for AS2501, maxLength 16.672 of 673
Route object: RIR157.82.0.0/16Route object only in RADB. Add it in the RIR database for the space.672 of 673
ROA: none192.51.208.0/20No ROA covers it. Add a ROA for AS2501, maxLength 20.672 of 673
Route object: RIR192.51.208.0/20Route object only in RADB. Add it in the RIR database for the space.672 of 673
ROA: none2404:d540::/32No ROA covers it. Add a ROA for AS2501, maxLength 32.634 of 636
Route object: RIR2404:d540::/32Route object only in RADB. Add it in the RIR database for the space.634 of 636
ROA: none2404:d540:1::/48No ROA covers it. Add a ROA for AS2501, maxLength 48.634 of 636
Route object: RIR2404:d540:1::/48Route object only in RADB. Add it in the RIR database for the space.634 of 636

Route objects not announced

Route objects with origin AS2501 whose prefix no peer sees AS2501 announce. Many are kept on purpose (backup routes, space announced only in some places).

192.31.118.0/24RADBNo ROA

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.