ResearchRouting table, RPKI, IRR & looking glass

AS33660 Comcast Cable Communications, LLC

AS33660 (CMCS) is registered to Comcast Cable Communications, LLC in US. It originates 57 prefixes in the global routing table.

8
IPv4 prefixes
49
IPv6 prefixes
2,048
IPv4 addresses
94%
RPKI valid

Who holds AS33660

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

AS number
AS33660
Handle
CMCS
Organization
Comcast Cable Communications, LLC
Country
US
ASPA
None published

What AS33660 announces

Prefixes originated by AS33660 in the RouteViews table (refreshed every four hours), each checked against the RPKI (every ten minutes) and the IRR (daily).

IPv4 prefixes
8
IPv6 prefixes
49
IPv4 addresses
2,048 (8 /24s)
RPKI valid
54 94%
RPKI invalid
0
RPKI not found
3
ROAs naming AS33660
1,377
With an IRR route object
47 82%

Who AS33660 is reached through

The AS just before AS33660 in the paths our looking glass collectors hold, for 57 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.

Route objects with origin AS33660: ARIN 106

as-sets that list AS33660 (4)