ResearchRouting table, RPKI, IRR & looking glass

AS33651 Comcast Cable Communications, LLC

AS33651 (CMCS) is registered to Comcast Cable Communications, LLC in US. It originates 296 prefixes in the global routing table.

109
IPv4 prefixes
187
IPv6 prefixes
82,176
IPv4 addresses
94%
RPKI valid
Registration

Who holds AS33651

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

AS number
AS33651
Handle
CMCS
Organization
Comcast Cable Communications, LLC
Country
US
ASPA
None published
Routing

What AS33651 announces

Prefixes originated by AS33651 in the RouteViews table (refreshed every four hours), each checked against the RPKI (every ten minutes) and the IRR (daily).

IPv4 prefixes
109
IPv6 prefixes
187
IPv4 addresses
82,176 (321 /24s)
RPKI valid
281 94%
RPKI invalid
4
RPKI not found
11
ROAs naming AS33651
4,889
With an IRR route object
39 13%
Prefixes

Announced prefixes

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

IPv4 (109)
5.182.186.0/245.182.193.0/245.182.194.0/245.182.195.0/249.142.48.0/209.142.96.0/199.142.118.0/2316.5.8.0/2323.230.200.0/2124.104.72.0/2424.104.73.0/2424.104.138.0/2324.104.150.0/2436.255.215.0/2440.27.174.0/2345.67.141.0/2450.145.55.0/2450.200.170.0/2450.201.8.0/2350.201.171.0/2450.204.119.0/2450.204.137.0/2450.205.226.0/2450.206.118.0/2450.206.120.0/2350.206.219.0/2450.207.182.0/2450.207.190.0/2450.207.216.0/2450.216.23.0/2450.216.212.0/2450.218.46.0/2450.219.139.0/2450.222.26.0/2450.222.50.0/2450.222.102.0/2450.224.7.0/2450.227.120.0/2450.227.186.0/2450.228.130.0/2450.229.212.0/2450.230.66.0/2450.231.143.0/2450.232.196.0/2450.233.45.0/2450.234.130.0/2450.235.20.0/2450.235.21.0/2450.235.233.0/2450.236.66.0/2450.239.184.0/2463.246.148.0/2463.246.152.0/2463.246.159.0/2464.84.96.0/2164.84.120.0/2169.91.146.0/2471.19.136.0/2471.19.137.0/2471.19.138.0/2471.19.139.0/2474.1.24.0/2374.120.252.0/2278.31.206.0/24100.42.16.0/23103.216.197.0/24104.247.212.0/23107.0.21.0/24107.158.6.0/24107.158.7.0/24107.158.164.0/24107.158.165.0/24135.132.64.0/19135.132.72.0/22135.132.76.0/22138.226.48.0/21138.226.64.0/20138.226.112.0/21138.226.192.0/21138.226.196.0/22139.181.26.0/24140.89.64.0/18162.218.64.0/23162.218.89.0/24169.128.80.0/22169.128.124.0/24169.128.125.0/24169.128.126.0/24169.128.127.0/24169.128.204.0/24169.128.205.0/24169.128.206.0/24169.128.207.0/24169.128.228.0/22169.230.76.0/24169.230.77.0/24185.22.43.0/24185.201.41.0/24185.201.43.0/24192.70.238.0/24192.189.161.0/24192.206.19.0/24198.145.106.0/24198.202.219.0/24204.145.245.0/24209.23.201.0/24209.23.253.0/24209.222.242.0/23216.170.120.0/24
IPv6 (187)
2001:559:e::/482001:559:6b::/482001:559:6e::/482001:559:77::/482001:559:78::/482001:559:9c::/482001:559:9d::/482001:559:9e::/482001:559:a4::/482001:559:c1::/482001:559:f3::/482001:559:104::/482001:559:106::/482001:559:17e::/482001:559:197::/482001:559:1c0::/482001:559:1c1::/482001:559:1ed::/482001:559:20e::/482001:559:218::/482001:559:21a::/482001:559:24f::/482001:559:259::/482001:559:262::/482001:559:295::/482001:559:2ac::/482001:559:2dd::/482001:559:2e6::/482001:559:305::/482001:559:329::/482001:559:340::/482001:559:35b::/482001:559:376::/482001:559:37e::/482001:559:39c::/482001:559:3bd::/482001:559:3be::/482001:559:457::/482001:559:499::/482001:559:4ac::/482001:559:519::/482001:559:520::/482001:559:53e::/482001:559:546::/482001:559:549::/482001:559:55a::/482001:559:755::/482001:559:7b1::/482001:559:8000::/482001:559:8087::/482001:559:80a9::/482001:559:80c3::/482001:559:80c4::/482001:559:81de::/482001:559:81e4::/482001:559:81f7::/482001:559:8242::/482001:559:824c::/482001:559:8261::/482001:559:829b::/482001:559:82e1::/482001:559:8302::/482001:559:8322::/482001:559:832e::/482001:559:8335::/482001:559:8342::/482001:559:8343::/482001:559:834d::/482001:559:8356::/482001:559:8368::/482001:559:837a::/482001:559:8389::/482001:559:839c::/482001:559:83aa::/482001:559:83ba::/482001:559:83c9::/482001:559:83cd::/482001:559:83ef::/482001:559:83f3::/482001:559:841f::/482001:559:845a::/482001:559:846f::/482001:559:84a3::/482001:559:8507::/482001:559:8529::/482001:559:8538::/482001:559:8542::/482001:559:8543::/482001:559:8552::/482001:559:8562::/482001:559:8578::/482001:559:8584::/482001:559:8585::/482001:559:85a2::/482001:559:85a3::/482001:559:85c7::/482001:559:85c8::/482001:559:85d4::/482001:559:85f3::/482001:559:85f4::/482001:559:85f5::/482001:559:8614::/482001:559:8615::/482001:559:861f::/482001:559:8632::/482001:559:8633::/482001:559:8635::/482001:559:8643::/482001:559:8645::/482001:559:8646::/482001:559:8647::/482001:559:864e::/482001:559:865d::/482001:559:865e::/482001:559:865f::/482001:559:8660::/482001:559:8661::/482001:559:866c::/482001:559:8694::/482001:559:86a8::/48
Show 67 more
2001:559:86a9::/482001:559:86dc::/482001:559:86dd::/482001:559:86e4::/482001:559:86e5::/482001:559:86ea::/482001:559:86f4::/482001:559:86f5::/482001:559:8719::/482001:559:8733::/482001:559:8734::/482001:559:877f::/482001:559:87ed::/482001:559:87ff::/482001:559:c02a::/482001:559:c058::/482001:559:c084::/482001:559:c094::/482001:559:c097::/482001:559:c0a8::/482001:559:c0aa::/482001:559:c0bd::/482001:559:c0be::/482001:559:c0e4::/482001:559:c0e5::/482001:559:c11b::/482001:559:c155::/482001:559:c172::/482001:559:c17f::/482001:559:c18d::/482001:559:c1a0::/482001:559:c1e0::/482001:559:c1e2::/482001:559:c1ec::/482001:559:c201::/482001:559:c207::/482001:559:c21f::/482001:559:c22a::/482001:559:c23a::/482001:559:c242::/482001:559:c249::/482001:559:c24a::/482001:559:c258::/482001:559:c274::/482001:559:c27b::/482001:559:c2a2::/482001:559:c309::/482001:559:c31f::/482001:559:c347::/482001:559:c369::/482001:559:c37d::/482001:559:c394::/482001:559:c3c8::/482001:559:c400::/482001:559:c42e::/482001:559:c470::/482001:559:c47c::/482001:559:c47e::/482001:559:c48c::/482001:559:c4a8::/482001:559:c4d8::/482001:559:c522::/482001:559:c523::/482001:559:c55f::/482001:559:c560::/482620:10a:6000::/442a0c:1900::/29

RPKI valid   RPKI invalid   no ROA covers it

Neighbors

Who AS33651 is reached through

The AS just before AS33651 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 57AS3356 LEVEL3 5
IRR

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 AS33651: RADB 65 · ARIN 34 · LEVEL3 10 · RIPE 8

as-sets that list AS33651 (6)
AS-17117IMPORTAS-COMCAST-IBONEAS-COMCAST-RANSAS-LEVEL3-ORIGINS-NAAS-LUMEN-CUSTOMERS-ASNSAS7922:AS-COMCAST-RANS
Tools

Check AS33651 live

ASN lookup and WHOISRPKI validatorASPA validatorIRR lookup