bgpreport

Network · data from 2026-11-12

AS37917 UTINS - University of Tsukuba

Registry name: UTINS - University of Tsukuba, JP · not in PeeringDB

3IPv4 routes 0.0% RPKI valid · 100.0% with a route object
0IPv6 routes
0RPKI invalid 0 origin · 0 maxLength
3No ROA 0 with no route object for this origin
0Low visibility seen by under 10% of full-table peers
0Route objects not announced registered with origin AS37917, seen from no peer

Announced routes

Every prefix a peer of the route collectors sees with origin AS37917, 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.
130.158.0.0/16 No ROA Other IRR onlyJPIRR 672 100% 69
133.51.0.0/16 No ROA Other IRR onlyJPIRR 672 100% 69
163.220.252.0/22 No ROA Other IRR onlyJPIRR 670 100% 69

AS-SET

AS37917 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 6 are in fix.csv.

  • ROA: none3
  • Route object: RIR3
ChangePrefix or setDetailFull-table peers
ROA: none130.158.0.0/16No ROA covers it. Add a ROA for AS37917, maxLength 16.672 of 673
Route object: RIR130.158.0.0/16Route object only in JPIRR. Add it in the RIR database for the space.672 of 673
ROA: none133.51.0.0/16No ROA covers it. Add a ROA for AS37917, maxLength 16.672 of 673
Route object: RIR133.51.0.0/16Route object only in JPIRR. Add it in the RIR database for the space.672 of 673
ROA: none163.220.252.0/22No ROA covers it. Add a ROA for AS37917, maxLength 22.670 of 673
Route object: RIR163.220.252.0/22Route object only in JPIRR. Add it in the RIR database for the space.670 of 673

Route objects not announced

Every route object with origin AS37917 is announced.

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.