AS21508 Comcast Cable Communications, LLC
COMCAST-21508
IPv4 Addresses: 71,680
Number of Peers: 51
Number of Prefixes: 87
ASN Allocated: Assigned
AS21508 Summary
Regional Registry:
IANAAllocation Status:
AssignedTraffic Ratio:
Not DisclosedAS21508 Network
IPv4 Prefixes:
19IPv4 Peers:
47IPv4 Upstreams:
1IPv6 Prefixes:
68IPv6 Peers:
4IPv6 Upstreams:
1Contacts
Email Contacts:
cnipeo-ip-registration@cable.comcast.com
routing@comcast.com
abuse@comcast.net
Abuse Contacts:
abuse@comcast.net
Address:
1800 Bishops Gate Blvd,
Mt Laurel,
NJ,
08054,
US
| Country | Announced Prefix | Description | Valid ROA | Parent Prefix | RIR |
|---|---|---|---|---|---|
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50.204.101.0/24 | Comcast Cable Communications, LLC | 50.128.0.0/9 | ARIN | |
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50.205.217.0/24 | Comcast Cable Communications, LLC | 50.128.0.0/9 | ARIN | |
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50.216.229.0/24 | Comcast Cable Communications, LLC | 50.128.0.0/9 | ARIN | |
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50.217.1.0/24 | Comcast Cable Communications, LLC | 50.128.0.0/9 | ARIN | |
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50.217.207.0/24 | Comcast Cable Communications, LLC | 50.128.0.0/9 | ARIN | |
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50.218.47.0/24 | Comcast Cable Communications, LLC | 50.128.0.0/9 | ARIN | |
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50.219.12.0/22 | Comcast Cable Communications, LLC | 50.128.0.0/9 | ARIN | |
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50.220.111.0/24 | Custom Computers | 50.128.0.0/9 | ARIN | |
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50.227.24.0/24 | Comcast Cable Communications, LLC | 50.128.0.0/9 | ARIN | |
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50.228.113.0/24 | Comcast Cable Communications, LLC | 50.128.0.0/9 | ARIN | |
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50.229.113.0/24 | Comcast Cable Communications, LLC | 50.128.0.0/9 | ARIN | |
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50.229.114.0/24 | Comcast Cable Communications, LLC | 50.128.0.0/9 | ARIN | |
|
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50.235.34.0/24 | Comcast Cable Communications, LLC | 54.160.0.0/11 | ARIN | |
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141.104.0.0/16 | Virginia Department of Education | 141.104.0.0/16 | ARIN | |
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157.240.148.0/24 | Facebook, Inc. | 157.240.0.0/16 | ARIN | |
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173.242.174.0/24 | County of Henrico | 173.242.160.0/20 | ARIN | |
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198.90.112.0/22 | WhiteSky Communications, LLC. | 198.90.96.0/19 | ARIN | |
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204.194.47.0/24 | Va. Dept. of Rehabilitative Services | 204.194.40.0/21 | ARIN | |
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205.223.19.0/24 | Virginia State Lottery Department | 205.223.16.0/20 | ARIN |
| Country | Announced Prefix | Description | Valid ROA | Parent Prefix | RIR |
|---|---|---|---|---|---|
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2001:559:8a::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:c0::/48 | Comcast Cable Communications, LLC | 2001:558::/29 | ARIN | |
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2001:559:f7::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:220::/48 | Comcast Cable Communications, LLC | 2001:558::/29 | ARIN | |
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2001:559:243::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:280::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:37d::/48 | Comcast Cable Communications, LLC | 2001:16a0::/29 | RIPE | |
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2001:559:3ac::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:3b9::/48 | Comcast Cable Communications, LLC | 2001:558::/29 | ARIN | |
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2001:559:3c8::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:40a::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:49a::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:49b::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:4b6::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:53c::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:5c9::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:5db::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:720::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:72b::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:73c::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:788::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:78a::/48 | Comcast Cable Communications, LLC | 2001:558::/29 | ARIN | |
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2001:559:79d::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:79e::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:7a7::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:7db::/48 | Comcast Cable Communications, LLC | 2001:558::/29 | ARIN | |
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2001:559:804c::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:81bf::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:81d7::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:81d8::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:8201::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:82fd::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:833e::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:8416::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:841c::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:8445::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:84a7::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:8535::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:85c1::/48 | Comcast Cable Communications, LLC | 2001:558::/29 | ARIN | |
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2001:559:85ff::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:8604::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:871a::/48 | Comcast Cable Communications, LLC | 2001:558::/29 | ARIN | |
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2001:559:875f::/48 | Comcast Cable Communications, LLC | 2001:558::/29 | ARIN | |
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2001:559:8773::/48 | Comcast Cable Communications, LLC | 2001:558::/29 | ARIN | |
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2001:559:87b2::/48 | Comcast Cable Communications, LLC | 2001:558::/29 | ARIN | |
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2001:559:c071::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:c0f6::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:c0f7::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:c0fa::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:c10a::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:c174::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:c1a5::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:c1ca::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:c28f::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:c290::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:c2a7::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:c344::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:c3e9::/48 | Comcast Cable Communications, LLC | 2001:558::/31 | ARIN | |
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2001:559:c458::/48 | Comcast Cable Communications, LLC | 2001:558::/29 | ARIN | |
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2001:559:c45f::/48 | Comcast Cable Communications, LLC | 2001:558::/29 | ARIN | |
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2001:559:c460::/48 | Comcast Cable Communications, LLC | 2001:558::/29 | ARIN | |
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2001:559:c495::/48 | Comcast Cable Communications, LLC | 2001:558::/29 | ARIN | |
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2001:559:c4c8::/48 | Comcast Cable Communications, LLC | 2001:558::/29 | ARIN | |
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2001:559:c4c9::/48 | Comcast Cable Communications, LLC | 2001:558::/29 | ARIN | |
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2001:559:c4db::/48 | Comcast Cable Communications, LLC | 2001:558::/29 | ARIN | |
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2001:559:c4f6::/48 | Comcast Cable Communications, LLC | 2001:558::/29 | ARIN | |
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2001:559:c515::/48 | Comcast Cable Communications, LLC | 2001:558::/29 | ARIN | |
|
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2001:559:c538::/48 | Comcast Cable Communications, LLC | 2001:558::/29 | ARIN |
| Country | ASN | Name | Description | IPv6 |
|---|---|---|---|---|
|
AS30299 | THE-MARTIN-AGENCY-HQ | THE MARTIN AGENCY | |
|
AS13335 | CLOUDFLARENET | Cloudflare, Inc. | |
|
AS7922 | COMCAST-7922 | Comcast Cable Communications, LLC | |
|
AS393415 | LITTNET | LITTLER MENDELSON, P.C. | |
|
AS40641 | MGWTEL | MGW Telephone Company, Inc. | |
|
AS15173 | NEWMA-11 | Newmarket Corporation | |
|
AS397483 | ACBO-185 | UNIVERSAL HEALTH SERVICES | |
|
AS40485 | SSB | SANDY SPRING BANK | |
|
AS54883 | CORVA | City of Richmond, Virginia | |
|
AS400114 | APOG-RBC | Apogee Telecom Inc. | |
|
AS22274 | SMP-VIR | Standard Motor Products, Inc | |
|
AS396452 | LOUDOUN-WATER | Loudoun Water | |
|
AS46643 | VIRGINIA-COLLEGE-SAVINGS-PLAN | Virginia College Savings Plan | |
|
AS397190 | WSP-DIGITAL | WSP | |
 |
AS395527 | |||
|
AS397039 | WORLDSTRIDES | WorldStrides | |
|
AS15297 | EPLUS-ASN | EPLUS, Inc. | |
|
AS40400 | EDC-MIDDLETOWN | Middletown Data Center | |
|
AS395772 | AHC-AS | Augusta Health Care, Inc | |
|
AS398475 | DRILLINGINFO-VIRGINIA | Drilling Info Inc. | |
|
AS10794 | BANKAMERICA | Bank of America, National Association | |
|
AS13952 | NCI-58-13952 | New College Institute | |
|
AS393861 | INOVA-PRIMARYASN-01 | Inova Health System Foundation | |
|
AS18773 | HENRICO-AS | County of Henrico | |
|
AS396083 | ARVUS-160-84 | Framatome Inc. | |
 |
AS2134 | GSVNET-AS | GS Virtual Network Produban | |
|
AS63468 | INFINITTNA | Infinitt North America, Inc. | |
|
AS36244 | SVEC | Shenandoah Valley Electric Cooperative | |
|
AS19923 | SHENANDOAH-UNIV | Shenandoah University | |
|
AS11679 | STIHL-204-124-67 | Stihl Inc. | |
|
AS393591 | GAMEWOODTECHNOLOGYGROUP | Gamewood Technology Group, Inc. | |
|
AS36364 | MHSNET | Mary Washington Hospital, Inc. | |
|
AS399099 | PCPS-ASN | petersburg city public schools | |
|
AS394058 | TELOSC-ASH | Telos Corporation | |
|
AS393613 | VACU-ASN-1 | Virginia Credit Union, Inc. | |
|
AS399232 | SETON-HOME | Seton Home Study School | |
|
AS32540 | HP-HOOD | HP Hood | |
|
AS27341 | GFNET-AS01 | Gannet Fleming, Inc. | |
|
AS54391 | CRUTCHFIELD | Crutchfield New Media LLC | |
|
AS23209 | VHDA20011260123220 | Virginia Housing Development Authority | |
|
AS11739 | CHIRISA-TECHNOLOGY-PARKS-01 | Digital Fortress, Inc. | |
|
AS27326 | VHSA-AS | VCU HEALTH SYSTEM AUTHORITY | |
|
AS399607 | LCPS-VA | Louisa County Public Schools | |
|
AS17381 | AS-WSI-ECOM-WEST | Williams-Sonoma | |
|
AS14583 | VITA-VSP-1 | Virginia Information Technologies Agency (VITA) | |
|
AS62971 | COUNTY-OF-CHESTERFIELD-VA | County of Chesterfield | |
|
AS54219 | SCHAWK-INC | Matthews International Corporation |
| Country | ASN | Name | Description | IPv6 |
|---|---|---|---|---|
|
AS7922 | COMCAST-7922 | Comcast Cable Communications, LLC |
IPv4 Upstream Graph
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| Country | ASN | Name | Description | IPv4 |
|---|---|---|---|---|
|
AS7922 | COMCAST-7922 | Comcast Cable Communications, LLC |
IPv6 Upstream Graph
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| Country | ASN | Name | Description | IPv6 |
|---|---|---|---|---|
|
AS40641 | MGWTEL | MGW Telephone Company, Inc. | |
|
AS18773 | HENRICO-AS | County of Henrico | |
|
AS15297 | EPLUS-ASN | EPLUS, Inc. | |
|
AS13335 | CLOUDFLARENET | Cloudflare, Inc. | |
|
AS40400 | EDC-MIDDLETOWN | Middletown Data Center | |
|
AS2134 | GSVNET-AS | GS Virtual Network Produban | |
|
AS396083 | ARVUS-160-84 | Framatome Inc. | |
|
AS400114 | APOG-RBC | Apogee Telecom Inc. | |
|
AS15173 | NEWMA-11 | Newmarket Corporation | |
|
AS394058 | TELOSC-ASH | Telos Corporation | |
|
AS19923 | SHENANDOAH-UNIV | Shenandoah University | |
|
AS13952 | NCI-58-13952 | New College Institute | |
|
AS54219 | SCHAWK-INC | Matthews International Corporation | |
|
AS399099 | PCPS-ASN | petersburg city public schools | |
|
AS32540 | HP-HOOD | HP Hood | |
|
AS40485 | SSB | SANDY SPRING BANK | |
|
AS54883 | CORVA | City of Richmond, Virginia | |
|
AS397483 | ACBO-185 | UNIVERSAL HEALTH SERVICES | |
|
AS11739 | CHIRISA-TECHNOLOGY-PARKS-01 | Digital Fortress, Inc. | |
|
AS36364 | MHSNET | Mary Washington Hospital, Inc. | |
|
AS36244 | SVEC | Shenandoah Valley Electric Cooperative | |
|
AS395772 | AHC-AS | Augusta Health Care, Inc | |
|
AS14583 | VITA-VSP-1 | Virginia Information Technologies Agency (VITA) | |
|
AS397039 | WORLDSTRIDES | WorldStrides | |
|
AS27326 | VHSA-AS | VCU HEALTH SYSTEM AUTHORITY | |
|
AS393591 | GAMEWOODTECHNOLOGYGROUP | Gamewood Technology Group, Inc. | |
|
AS11679 | STIHL-204-124-67 | Stihl Inc. | |
|
AS10794 | BANKAMERICA | Bank of America, National Association | |
|
AS54391 | CRUTCHFIELD | Crutchfield New Media LLC | |
|
AS63468 | INFINITTNA | Infinitt North America, Inc. | |
|
AS393415 | LITTNET | LITTLER MENDELSON, P.C. | |
|
AS393861 | INOVA-PRIMARYASN-01 | Inova Health System Foundation | |
|
AS399232 | SETON-HOME | Seton Home Study School | |
|
AS399607 | LCPS-VA | Louisa County Public Schools | |
|
AS17381 | AS-WSI-ECOM-WEST | Williams-Sonoma | |
|
AS22274 | SMP-VIR | Standard Motor Products, Inc | |
|
AS23209 | VHDA20011260123220 | Virginia Housing Development Authority | |
|
AS27341 | GFNET-AS01 | Gannet Fleming, Inc. | |
|
AS30299 | THE-MARTIN-AGENCY-HQ | THE MARTIN AGENCY | |
|
AS46643 | VIRGINIA-COLLEGE-SAVINGS-PLAN | Virginia College Savings Plan | |
|
AS62971 | COUNTY-OF-CHESTERFIELD-VA | County of Chesterfield | |
|
AS393613 | VACU-ASN-1 | Virginia Credit Union, Inc. | |
|
AS395527 | |||
|
AS396452 | LOUDOUN-WATER | Loudoun Water | |
|
AS397190 | WSP-DIGITAL | WSP | |
|
AS398475 | DRILLINGINFO-VIRGINIA | Drilling Info Inc. |
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# # ARIN WHOIS data and services are subject to the Terms of Use # available at: https://www.arin.net/resources/registry/whois/tou/ # # If you see inaccuracies in the results, please report at # https://www.arin.net/resources/registry/whois/inaccuracy_reporting/ # # Copyright 1997-2025, American Registry for Internet Numbers, Ltd. # ASNumber: 21508 ASName: COMCAST-21508 ASHandle: AS21508 RegDate: 2001-05-16 Updated: 2021-01-25 Ref: https://rdap.arin.net/registry/autnum/21508 OrgName: Comcast Cable Communications, LLC OrgId: CCCS Address: 1800 Bishops Gate Blvd City: Mt Laurel StateProv: NJ PostalCode: 08054 Country: US RegDate: 2001-09-18 Updated: 2020-11-18 Ref: https://rdap.arin.net/registry/entity/CCCS OrgTechHandle: IC161-ARIN OrgTechName: Comcast Cable Communications Inc OrgTechPhone: +1-856-792-2300 OrgTechEmail: CNIPEO-Ip-registration@cable.comcast.com OrgTechRef: https://rdap.arin.net/registry/entity/IC161-ARIN OrgRoutingHandle: ROUTI25-ARIN OrgRoutingName: Routing OrgRoutingPhone: +1-856-792-2300 OrgRoutingEmail: routing@comcast.com OrgRoutingRef: https://rdap.arin.net/registry/entity/ROUTI25-ARIN OrgAbuseHandle: NAPO-ARIN OrgAbuseName: Network Abuse and Policy Observance OrgAbusePhone: +1-888-565-4329 OrgAbuseEmail: abuse@comcast.net OrgAbuseRef: https://rdap.arin.net/registry/entity/NAPO-ARIN # # ARIN WHOIS data and services are subject to the Terms of Use # available at: https://www.arin.net/resources/registry/whois/tou/ # # If you see inaccuracies in the results, please report at # https://www.arin.net/resources/registry/whois/inaccuracy_reporting/ # # Copyright 1997-2025, American Registry for Internet Numbers, Ltd. #
| Country | IX | Name | IPv4 | IPv6 | Port Speed |
|---|