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AS33657

CMCS

Comcast Cable Communications, LLC

Registry

Authoritative registration data

AS number
33657
Name
CMCS
Organisation
Comcast Cable Communications, LLC
Country
—
RIR
ARIN
Registered
Source:asn:rdap retrieved

IPv4 prefixes

29

IPv6 prefixes

245

Total announced

274

Announced prefixes

Observed in BGP by route collectors, not a registry allocation list

Prefixes announced by AS33657
69.67.80.0/20 IPv4 /20 not checked
192.110.220.0/23 IPv4 /23 not checked
107.1.101.0/24 IPv4 /24 not checked
192.189.235.0/24 IPv4 /24 not checked
208.87.105.0/24 IPv4 /24 not checked
50.201.252.0/24 IPv4 /24 not checked
50.202.117.0/24 IPv4 /24 not checked
50.202.155.0/24 IPv4 /24 not checked
50.203.251.0/24 IPv4 /24 not checked
50.204.116.0/24 IPv4 /24 not checked
50.204.128.0/24 IPv4 /24 not checked
50.205.74.0/24 IPv4 /24 not checked
50.207.162.0/24 IPv4 /24 not checked
50.216.214.0/24 IPv4 /24 not checked
50.218.16.0/24 IPv4 /24 not checked
50.219.87.0/24 IPv4 /24 not checked
50.223.158.0/24 IPv4 /24 not checked
50.223.159.0/24 IPv4 /24 not checked
50.224.212.0/24 IPv4 /24 not checked
50.226.61.0/24 IPv4 /24 not checked
50.232.109.0/24 IPv4 /24 not checked
50.232.173.0/24 IPv4 /24 not checked
50.232.184.0/24 IPv4 /24 not checked
50.235.236.0/24 IPv4 /24 not checked
50.235.98.0/24 IPv4 /24 not checked
50.236.234.0/24 IPv4 /24 not checked
50.236.38.0/24 IPv4 /24 not checked
50.238.163.0/24 IPv4 /24 not checked
76.78.2.0/24 IPv4 /24 not checked
2001:559:110::/48 IPv6 /48 not checked
2001:559:136::/48 IPv6 /48 not checked
2001:559:16a::/48 IPv6 /48 not checked
2001:559:191::/48 IPv6 /48 not checked
2001:559:1da::/48 IPv6 /48 RPKI valid
2001:559:1f0::/48 IPv6 /48 not checked
2001:559:1f8::/48 IPv6 /48 not checked
2001:559:202::/48 IPv6 /48 not checked
2001:559:214::/48 IPv6 /48 not checked
2001:559:246::/48 IPv6 /48 not checked
2001:559:25a::/48 IPv6 /48 not checked
2001:559:25b::/48 IPv6 /48 RPKI valid
2001:559:282::/48 IPv6 /48 not checked
2001:559:284::/48 IPv6 /48 not checked
2001:559:288::/48 IPv6 /48 not checked
2001:559:2b6::/48 IPv6 /48 not checked
2001:559:2ca::/48 IPv6 /48 RPKI valid
2001:559:2cb::/48 IPv6 /48 RPKI valid
2001:559:2f3::/48 IPv6 /48 not checked
2001:559:300::/48 IPv6 /48 not checked
2001:559:304::/48 IPv6 /48 not checked
2001:559:30d::/48 IPv6 /48 not checked
2001:559:319::/48 IPv6 /48 not checked
2001:559:380::/48 IPv6 /48 not checked
2001:559:3ba::/48 IPv6 /48 RPKI valid
2001:559:3ca::/48 IPv6 /48 RPKI valid
2001:559:3d2::/48 IPv6 /48 not checked
2001:559:3dc::/48 IPv6 /48 not checked
2001:559:3eb::/48 IPv6 /48 RPKI valid
2001:559:3f1::/48 IPv6 /48 not checked
2001:559:414::/48 IPv6 /48 not checked
2001:559:42c::/48 IPv6 /48 not checked
2001:559:43a::/48 IPv6 /48 not checked
2001:559:45a::/48 IPv6 /48 not checked
2001:559:488::/48 IPv6 /48 not checked
2001:559:489::/48 IPv6 /48 not checked
2001:559:48::/48 IPv6 /48 not checked
2001:559:491::/48 IPv6 /48 not checked
2001:559:4a0::/48 IPv6 /48 not checked
2001:559:4a5::/48 IPv6 /48 not checked
2001:559:4a8::/48 IPv6 /48 not checked
2001:559:548::/48 IPv6 /48 not checked
2001:559:574::/48 IPv6 /48 not checked
2001:559:588::/48 IPv6 /48 not checked
2001:559:5b7::/48 IPv6 /48 not checked
2001:559:5cb::/48 IPv6 /48 RPKI valid
2001:559:5cd::/48 IPv6 /48 RPKI valid
2001:559:5d3::/48 IPv6 /48 not checked
2001:559:5ef::/48 IPv6 /48 not checked
2001:559:70d::/48 IPv6 /48 not checked
2001:559:714::/48 IPv6 /48 not checked
2001:559:718::/48 IPv6 /48 not checked
2001:559:721::/48 IPv6 /48 not checked
2001:559:724::/48 IPv6 /48 not checked
2001:559:737::/48 IPv6 /48 not checked
2001:559:74b::/48 IPv6 /48 RPKI valid
2001:559:758::/48 IPv6 /48 not checked
2001:559:75e::/48 IPv6 /48 not checked
2001:559:794::/48 IPv6 /48 not checked
2001:559:7a1::/48 IPv6 /48 not checked
2001:559:7a::/48 IPv6 /48 not checked
2001:559:7be::/48 IPv6 /48 not checked
2001:559:7d0::/48 IPv6 /48 not checked
2001:559:7e2::/48 IPv6 /48 not checked
2001:559:7e5::/48 IPv6 /48 not checked
2001:559:7e6::/48 IPv6 /48 not checked
2001:559:7e9::/48 IPv6 /48 not checked
2001:559:7fe::/48 IPv6 /48 not checked
2001:559:800a::/48 IPv6 /48 RPKI valid
2001:559:803f::/48 IPv6 /48 RPKI valid
2001:559:8040::/48 IPv6 /48 not checked
2001:559:8041::/48 IPv6 /48 not checked
2001:559:805e::/48 IPv6 /48 not checked
2001:559:8061::/48 IPv6 /48 not checked
2001:559:808e::/48 IPv6 /48 not checked
2001:559:8090::/48 IPv6 /48 not checked
2001:559:80b0::/48 IPv6 /48 RPKI valid
2001:559:80b1::/48 IPv6 /48 RPKI valid
2001:559:80b5::/48 IPv6 /48 RPKI valid
2001:559:80c2::/48 IPv6 /48 RPKI valid
2001:559:80cb::/48 IPv6 /48 not checked
2001:559:80d3::/48 IPv6 /48 RPKI valid
2001:559:80e9::/48 IPv6 /48 RPKI valid
2001:559:80f5::/48 IPv6 /48 RPKI valid
2001:559:80fc::/48 IPv6 /48 not checked
2001:559:80fd::/48 IPv6 /48 RPKI valid
2001:559:810e::/48 IPv6 /48 not checked
2001:559:8140::/48 IPv6 /48 not checked
2001:559:8141::/48 IPv6 /48 not checked
2001:559:814f::/48 IPv6 /48 RPKI valid
2001:559:8154::/48 IPv6 /48 not checked
2001:559:8161::/48 IPv6 /48 not checked
2001:559:816a::/48 IPv6 /48 RPKI valid
2001:559:816b::/48 IPv6 /48 not checked
2001:559:816d::/48 IPv6 /48 not checked
2001:559:8171::/48 IPv6 /48 not checked
2001:559:8180::/48 IPv6 /48 RPKI invalid
2001:559:81b5::/48 IPv6 /48 not checked
2001:559:81ca::/48 IPv6 /48 not checked
2001:559:81f0::/48 IPv6 /48 RPKI valid
2001:559:81ff::/48 IPv6 /48 RPKI valid
2001:559:8212::/48 IPv6 /48 not checked
2001:559:8213::/48 IPv6 /48 not checked
2001:559:8215::/48 IPv6 /48 not checked
2001:559:8247::/48 IPv6 /48 not checked
2001:559:8262::/48 IPv6 /48 not checked
2001:559:8263::/48 IPv6 /48 not checked
2001:559:82c9::/48 IPv6 /48 RPKI valid
2001:559:82d8::/48 IPv6 /48 RPKI valid
2001:559:832a::/48 IPv6 /48 RPKI valid
2001:559:8331::/48 IPv6 /48 not checked
2001:559:8336::/48 IPv6 /48 not checked
2001:559:8338::/48 IPv6 /48 not checked
2001:559:833a::/48 IPv6 /48 RPKI valid
2001:559:834c::/48 IPv6 /48 RPKI valid
2001:559:835c::/48 IPv6 /48 not checked
2001:559:836f::/48 IPv6 /48 RPKI valid
2001:559:837f::/48 IPv6 /48 RPKI valid
2001:559:8380::/48 IPv6 /48 not checked
2001:559:8396::/48 IPv6 /48 not checked
2001:559:83b9::/48 IPv6 /48 RPKI valid
2001:559:83eb::/48 IPv6 /48 RPKI valid
2001:559:840d::/48 IPv6 /48 not checked
2001:559:8419::/48 IPv6 /48 not checked
2001:559:841b::/48 IPv6 /48 not checked
2001:559:841d::/48 IPv6 /48 not checked
2001:559:8444::/48 IPv6 /48 not checked
2001:559:846a::/48 IPv6 /48 RPKI valid
2001:559:847a::/48 IPv6 /48 RPKI valid
2001:559:847e::/48 IPv6 /48 not checked
2001:559:849f::/48 IPv6 /48 RPKI valid
2001:559:84af::/48 IPv6 /48 not checked
2001:559:84bc::/48 IPv6 /48 not checked
2001:559:84be::/48 IPv6 /48 RPKI valid
2001:559:84cc::/48 IPv6 /48 not checked
2001:559:84de::/48 IPv6 /48 not checked
2001:559:84e1::/48 IPv6 /48 RPKI valid
2001:559:8510::/48 IPv6 /48 not checked
2001:559:8516::/48 IPv6 /48 not checked
2001:559:857e::/48 IPv6 /48 not checked
2001:559:857f::/48 IPv6 /48 RPKI valid
2001:559:8581::/48 IPv6 /48 not checked
2001:559:8582::/48 IPv6 /48 not checked
2001:559:8583::/48 IPv6 /48 not checked
2001:559:85a7::/48 IPv6 /48 not checked
2001:559:85ab::/48 IPv6 /48 not checked
2001:559:85bc::/48 IPv6 /48 RPKI valid
2001:559:85cd::/48 IPv6 /48 RPKI valid
2001:559:85e4::/48 IPv6 /48 RPKI valid
2001:559:85ec::/48 IPv6 /48 not checked
2001:559:85f0::/48 IPv6 /48 RPKI valid
2001:559:8617::/48 IPv6 /48 not checked
2001:559:864a::/48 IPv6 /48 RPKI valid
2001:559:865a::/48 IPv6 /48 RPKI valid
2001:559:865b::/48 IPv6 /48 not checked
2001:559:8682::/48 IPv6 /48 not checked
2001:559:869b::/48 IPv6 /48 not checked
2001:559:869c::/48 IPv6 /48 RPKI valid
2001:559:86ba::/48 IPv6 /48 RPKI valid
2001:559:8722::/48 IPv6 /48 not checked
2001:559:8726::/48 IPv6 /48 not checked
2001:559:8728::/48 IPv6 /48 not checked
2001:559:8740::/48 IPv6 /48 not checked
2001:559:874d::/48 IPv6 /48 not checked
2001:559:874f::/48 IPv6 /48 RPKI valid
2001:559:875e::/48 IPv6 /48 not checked
2001:559:8779::/48 IPv6 /48 not checked
2001:559:8786::/48 IPv6 /48 not checked
2001:559:8794::/48 IPv6 /48 not checked
2001:559:87::/48 IPv6 /48 not checked
2001:559:87b4::/48 IPv6 /48 RPKI valid
2001:559:87cc::/48 IPv6 /48 not checked
2001:559:87f5::/48 IPv6 /48 RPKI valid
2001:559:a2::/48 IPv6 /48 not checked
2001:559:ae::/48 IPv6 /48 RPKI valid
2001:559:c012::/48 IPv6 /48 not checked
2001:559:c05b::/48 IPv6 /48 RPKI valid
2001:559:c06a::/48 IPv6 /48 not checked
2001:559:c098::/48 IPv6 /48 not checked
2001:559:c0c2::/48 IPv6 /48 not checked
2001:559:c0c3::/48 IPv6 /48 not checked
2001:559:c0c4::/48 IPv6 /48 not checked
2001:559:c130::/48 IPv6 /48 not checked
2001:559:c133::/48 IPv6 /48 not checked
2001:559:c140::/48 IPv6 /48 not checked
2001:559:c141::/48 IPv6 /48 not checked
2001:559:c15e::/48 IPv6 /48 not checked
2001:559:c178::/48 IPv6 /48 not checked
2001:559:c180::/48 IPv6 /48 not checked
2001:559:c1a1::/48 IPv6 /48 not checked
2001:559:c1b5::/48 IPv6 /48 not checked
2001:559:c1b8::/48 IPv6 /48 not checked
2001:559:c1d3::/48 IPv6 /48 RPKI valid
2001:559:c1f0::/48 IPv6 /48 RPKI valid
2001:559:c209::/48 IPv6 /48 not checked
2001:559:c221::/48 IPv6 /48 not checked
2001:559:c277::/48 IPv6 /48 not checked
2001:559:c29f::/48 IPv6 /48 RPKI valid
2001:559:c2a0::/48 IPv6 /48 not checked
2001:559:c2b0::/48 IPv6 /48 not checked
2001:559:c2b1::/48 IPv6 /48 not checked
2001:559:c2c6::/48 IPv6 /48 not checked
2001:559:c2d9::/48 IPv6 /48 not checked
2001:559:c2e2::/48 IPv6 /48 not checked
2001:559:c305::/48 IPv6 /48 not checked
2001:559:c307::/48 IPv6 /48 not checked
2001:559:c30a::/48 IPv6 /48 not checked
2001:559:c320::/48 IPv6 /48 not checked
2001:559:c32e::/48 IPv6 /48 not checked
2001:559:c342::/48 IPv6 /48 not checked
2001:559:c349::/48 IPv6 /48 not checked
2001:559:c351::/48 IPv6 /48 not checked
2001:559:c365::/48 IPv6 /48 not checked
2001:559:c379::/48 IPv6 /48 not checked
2001:559:c37a::/48 IPv6 /48 not checked
2001:559:c388::/48 IPv6 /48 not checked
2001:559:c390::/48 IPv6 /48 not checked
2001:559:c39d::/48 IPv6 /48 not checked
2001:559:c3b0::/48 IPv6 /48 not checked
2001:559:c3c4::/48 IPv6 /48 not checked
2001:559:c3d3::/48 IPv6 /48 RPKI valid
2001:559:c3d6::/48 IPv6 /48 RPKI valid
2001:559:c3ea::/48 IPv6 /48 not checked
2001:559:c3f2::/48 IPv6 /48 RPKI valid
2001:559:c3f3::/48 IPv6 /48 RPKI valid
2001:559:c42a::/48 IPv6 /48 not checked
2001:559:c438::/48 IPv6 /48 not checked
2001:559:c43e::/48 IPv6 /48 not checked
2001:559:c44d::/48 IPv6 /48 not checked
2001:559:c454::/48 IPv6 /48 not checked
2001:559:c468::/48 IPv6 /48 not checked
2001:559:c478::/48 IPv6 /48 not checked
2001:559:c48f::/48 IPv6 /48 RPKI valid
2001:559:c4a7::/48 IPv6 /48 not checked
2001:559:c4b0::/48 IPv6 /48 not checked
2001:559:c4b8::/48 IPv6 /48 not checked
2001:559:c4bf::/48 IPv6 /48 not checked
2001:559:c4d9::/48 IPv6 /48 RPKI valid
2001:559:c4f7::/48 IPv6 /48 RPKI valid
2001:559:c4f8::/48 IPv6 /48 RPKI valid
2001:559:c505::/48 IPv6 /48 not checked
2001:559:c516::/48 IPv6 /48 not checked
2001:559:c54f::/48 IPv6 /48 RPKI valid
2001:559:c572::/48 IPv6 /48 not checked
2001:559:db::/48 IPv6 /48 not checked

No rows match “”.

Showing – of

Source:ripestat:announced-prefixes observed

Internet Exchanges

Exchanges where this network has a listed peering LAN connection

No Internet Exchange memberships found

The exchange directory has no current membership records for this AS.

Source:peeringdb retrieved

Exchange membership means the network has a listed connection; it does not prove peering with other members.

Observed adjacencies

Networks seen next to AS33657 in BGP paths by route collectors.

Source:ripestat:asn-neighbours observed

Observed upstreams

2 networks seen before AS33657 in AS paths

Observed upstreams
Families
AS7922 COMCAST-7922 7,835 55,192
v4 v6
AS3356 LEVEL3 3,336 7,528
v4 v6

No rows match “”.

Showing – of

Observed downstreams

100 networks seen after AS33657 in AS paths

Observed downstreams
Families
AS27016 NRC-NET 174 2,436
v4 v6
AS394077 LIFEBRIDGEHEALTH 207 1,001
v4
AS11790 RANDOMHOUSE 290 892
v4
AS32073 MCPS-K12-MD-US 141 847
v4
AS22101 CPIL-ASN 141 672
v4
AS53373 MATH-INC 140 668
v4
AS17190 ASN17190 208 570
v4
AS2703 148 504
v4
AS16463 DPSINET 142 504
v4
AS25716 INGERSOLL-RAND 141 504
v4
AS19320 FLEX-WDF 124 404
v4
AS11951 MCSP 145 365
v4
AS398820 EA-ASN-01 132 365
v4 v6
AS20137 USAGM-LAN 144 343
v4
AS26522 SU-ASN-1 194 340
v4 v6
AS19936 GORDONFOODS 150 336
v4
AS40410 USFRCS-BGP 143 336
v4
AS16881 DAVID-C-PRALL-INTERNET 186 326
v4 v6
AS400902 WASGN 272 323
v4
AS53350 EMBHUN-WAS-01 275 320
v4
AS26868 NCTA-WASHINGTONDC 170 286
v4 v6
AS10918 ACCURANT 168 282
v4 v6
AS2384 AOCNET 125 276
v4
AS32291 ANNEARUNDELMEDICALCENTER 175 226
v4
AS27336 SENTARA-HEALTH-CARE 142 215
v4
AS12245 PRMC-ASN 64 213
v4
AS400678 IPV4 142 200
v4
AS40954 JMFAMILY 141 196
v4
AS13511 UNIVI-2-ASN 142 180
v4
AS401366 VOX-FLOW 63 172
v4 v6
AS26020 STSCI-NET 136 169
v4
AS5721 NDU-NET 143 168
v4
AS25696 142 168
v4
AS33506 CPINETWORKS-AS 142 168
v4
AS4880 LIFELINE-ASN 141 168
v4
AS30385 PERDUE-FARMS-INCORPORATED 141 168
v4
AS62957 HOSPITALITY-NETWORK 141 168
v4
AS36457 DISTR-21 140 168
v4
AS40857 PAECOM 140 168
v4 v6
AS22593 BCBSNC-AS 142 167
v4
AS46187 SPY 142 167
v4
AS21683 DALKO-NETWORKS 141 167
v4
AS22962 KENNEDY-NW-DC-US 141 167
v4
AS36151 ACUOA-NET 141 167
v4
AS46200 ITC-146 141 167
v4
AS15134 PWCSA 140 167
v4
AS3705 GPO-NET 141 166
v4
AS36040 YOUTUBE 141 166
v4
AS22694 VERSANT-MEDIA 140 164
v4
AS29865 CONTREALTYCORP 140 164
v4
AS397487 RAVENS-ASN 140 164
v4
AS33738 UNITED-STATES-HOLOCAUST-MEMORIAL-MUSEUM 139 164
v4
AS40391 CHSINC 141 163
v4
AS12222 AKAMAI 135 161
v4
AS33170 MORGAN-STATE-UNIVERSITY 135 161
v4
AS14246 THALESCOMMINC-AS 136 160
v4
AS33174 PRINCE-WILLIAM-COUNTY-VA-ASN 128 160
v6
AS46784 DPW 137 159
v4
AS22815 KELLY-INSURANCE-GROUP 136 159
v4
AS19316 QUADRANGLE 136 158
v4
AS31902 OTS 134 158
v4
AS3573 ACCENTURE 129 158
v6
AS396017 COMCAST-MES 126 157
v4 v6
AS400044 AS-CEIWC 133 155
v4
AS26793 ICS-LLC 126 155
v6
AS401533 TGSLLC-02 125 155
v6
AS1358 HNSNET-AS 111 137
v4
AS63336 ADVENTIST-HEALTHCARE-MARYLAND 116 135
v4
AS17035 NBCUNI-17035 114 131
v4
AS396222 TENABLE-NETWORK-SECURITY-INC 106 123
v4
AS11131 UMBC-AS 62 80
v6
AS46624 BEEBE-MEDICAL-CENTER 59 65
v4
AS395145 MCDONOGH 59 65
v4
AS54849 KANE-IS-ABLE 54 61
v4
AS54201 WEWORK-MANAGEMENT-LLC 46 52
v6
AS572 GBMC-TOW 15 48
v4
AS16409 PBW-COMMUNICATIONS 12 36
v4
AS53862 MCDANIELCOLLEGE 29 33
v4
AS19574 CSC 19 33
v4 v6
AS46988 MICA-AS 23 25
v4
AS22613 GWU-055 21 25
v4
AS14473 I3ASN1-200E 16 21
v4
AS395009 VECTORWORKS-NET 16 21
v4
AS7820 TOWERFCU-AS 15 16
v4
AS13582 COWAN-ASN 15 16
v4
AS16505 HTF-FREDERICK 15 16
v4
AS40833 NYTD-SEA1 15 16
v4
AS396018 15 16
v4
AS396514 CI-AS 15 16
v4
AS397154 GRANULES-CONSUMER-HEALTH-NET 15 16
v4
AS13628 CENCORA-INTERNET 4 16
v4
AS30641 STATEOFDE 6 12
v4
AS25984 3 12
v4
AS393706 NELSONCABLE 3 12
v4
AS27003 AMERICAN-BANKERS-ASSOCIATION 11 11
v4
AS30330 ARI-9000 7 9
v6
AS11362 VECTOR 7 8
v4
AS27026 NETWORKMARYLAND 5 8
v4
AS14862 OCEANEERING 4 8
v4
AS46084 ASRCFH-NET 4 8
v4

No rows match “”.

Showing – of

Note:
These are observed adjacencies derived from BGP path data, not confirmed commercial relationships. A network appearing before another in an AS path does not establish that it is a paying transit customer, a settlement free peer, or anything else contractual.