ResearchRouting table, RPKI, IRR & looking glass

AS33668 Comcast Cable Communications, LLC

AS33668 (CMCS) is registered to Comcast Cable Communications, LLC in US. It originates 95 prefixes in the global routing table.

IPv4 prefixes

IPv6 prefixes

6,656

IPv4 addresses

91%

RPKI valid

Registration

Who holds AS33668

Names from RIPE NCC’s daily list of every allocated AS number. The ASN lookup fetches the full WHOIS record live.

AS number

AS33668

Handle

CMCS

Organization

Comcast Cable Communications, LLC

Country

ASPA

None published

Routing

What AS33668 announces

Prefixes originated by AS33668 in the RouteViews table (refreshed every four hours), each checked against the RPKI (every ten minutes) and the IRR (daily).

IPv4 prefixes

IPv6 prefixes

IPv4 addresses

6,656 (26 /24s)

RPKI valid

87 91%

RPKI invalid

RPKI not found

ROAs naming AS33668

3,355

With an IRR route object

23 24%

Prefixes

Announced prefixes

Each opens its own page: who announces it, the paths our collectors see, its ROAs and route objects.

IPv4 (26)

IPv6 (69)

2001:559:44::/48 2001:559:f2::/48 2001:559:10d::/48 2001:559:10e::/48 2001:559:15c::/48 2001:559:1ef::/48 2001:559:248::/48 2001:559:254::/48 2001:559:25c::/48 2001:559:25d::/48 2001:559:261::/48 2001:559:270::/48 2001:559:318::/48 2001:559:330::/48 2001:559:33d::/48 2001:559:361::/48 2001:559:365::/48 2001:559:391::/48 2001:559:3ce::/48 2001:559:3d9::/48 2001:559:3fe::/48 2001:559:5a4::/48 2001:559:5c8::/48 2001:559:704::/48 2001:559:7e0::/48 2001:559:7e7::/48 2001:559:8093::/48 2001:559:809e::/48 2001:559:80ac::/48 2001:559:815e::/48 2001:559:817a::/48 2001:559:817b::/48 2001:559:82d7::/48 2001:559:82f7::/48 2001:559:835e::/48 2001:559:83e5::/48 2001:559:8441::/48 2001:559:847f::/48 2001:559:84c0::/48 2001:559:84db::/48 2001:559:8567::/48 2001:559:8577::/48 2001:559:85fa::/48 2001:559:85fb::/48 2001:559:860e::/48 2001:559:8709::/48 2001:559:8730::/48 2001:559:8752::/48 2001:559:8774::/48 2001:559:c0c8::/48 2001:559:c0e6::/48 2001:559:c150::/48 2001:559:c1a3::/48 2001:559:c1b4::/48 2001:559:c1b6::/48 2001:559:c1c0::/48 2001:559:c1cd::/48 2001:559:c1ce::/48 2001:559:c345::/48 2001:559:c3aa::/48 2001:559:c3c5::/48 2001:559:c3e2::/48 2001:559:c3eb::/48 2001:559:c45a::/48 2001:559:c48d::/48 2001:559:c500::/48 2001:559:c539::/48 2001:559:c568::/48 2602:810:20c3::/48

RPKI valid RPKI invalid no ROA covers it

Neighbors

Who AS33668 is reached through

The AS just before AS33668 in the paths our looking glass collectors hold, for 60 of its prefixes. Usually a transit provider, sometimes a peer. The number is how many of those prefixes it was seen on.

AS7922 COMCAST-7922 60 AS3356 LEVEL3 5

IRR

Routing registry objects

From the mirrored IRR databases (RADB, the five RIRs and more). Look it up live.

Route objects with origin AS33668: RADB 31 · ARIN 30 · LEVEL3 29

as-sets that list AS33668 (5)

AS-COMCAST-IBONE AS-COMCAST-RANS AS-LEVEL3-ORIGINS-NA AS-LUMEN-CUSTOMERS-ASNS AS7922:AS-COMCAST-RANS

Tools

Check AS33668 live

ASN lookup and WHOIS RPKI validator ASPA validator IRR lookup