bgpreport

Network · data from 2026-11-12

AS396021 COMCAST-MES - Comcast Cable Communications, LLC

Registry name: COMCAST-MES - Comcast Cable Communications, LLC, US · not in PeeringDB

4IPv4 routes 100.0% RPKI valid · 75.0% with a route object
0IPv6 routes
0RPKI invalid 0 origin · 0 maxLength
0No ROA 1 with no route object for this origin
0Low visibility seen by under 10% of full-table peers
4Route objects not announced registered with origin AS396021, seen from no peer

Announced routes

Every prefix a peer of the route collectors sees with origin AS396021, 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.
50.171.218.0/24 Valid None 664 99% 67
50.216.94.0/24 Valid RIR databaseARIN 664 99% 67
50.225.249.0/24 Valid RIR databaseARIN, RADB 664 99% 67
50.227.252.0/23 Valid RIR databaseARIN, RADB 664 99% 67

AS-SET

AS396021 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 5 are in fix.csv.

  • Route object: none1
  • Route object: not announced4
ChangePrefix or setDetailFull-table peers
Route object: none50.171.218.0/24No route object for it. Add a route object with origin AS396021 in the RIR database for the space.664 of 673

Route objects not announced

Route objects with origin AS396021 whose prefix no peer sees AS396021 announce. Many are kept on purpose (backup routes, space announced only in some places).

50.175.118.0/24ARINValid
50.220.116.0/24ARINValid
2001:558:feed:df::/64ARINValid
2001:559:704b::/48ARINValid

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.