ResearchRouting table, RPKI, IRR & looking glass

AS33666 Comcast Cable Communications, LLC

AS33666 (CMCS) is registered to Comcast Cable Communications, LLC in US. It originates 6 prefixes in the global routing table.

3
IPv4 prefixes
3
IPv6 prefixes
768
IPv4 addresses
50%
RPKI valid

Who holds AS33666

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

AS number
AS33666
Handle
CMCS
Organization
Comcast Cable Communications, LLC
Country
US
ASPA
None published

What AS33666 announces

Prefixes originated by AS33666 in the RouteViews table (refreshed every four hours), each checked against the RPKI (every ten minutes) and the IRR (daily).

IPv4 prefixes
3
IPv6 prefixes
3
IPv4 addresses
768 (3 /24s)
RPKI valid
3 50%
RPKI invalid
0
RPKI not found
3
ROAs naming AS33666
110
With an IRR route object
3 50%

Announced prefixes

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

Who AS33666 is reached through

The AS just before AS33666 in the paths our looking glass collectors hold, for 6 of its prefixes. Usually a transit provider, sometimes a peer. The number is how many of those prefixes it was seen on.

Routing registry objects

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

Sourceas-nameMaintained by
LEVEL3NMNT-CMCS

Route objects with origin AS33666: ARIN 109 · LEVEL3 50

as-sets that list AS33666 (5)