AS Number
AS21508
AS Name
COMCAST-21508
Org Name
Comcast Cable Communications, LLC
Registry

arin

RegDate

2001-09-18

Updated

2020-11-18

AS21508 Looking Glass
IPv4Prefixes

23

IPv6Prefixes

69

IPv4 NUMs

72,448

IPv6 NUMs(/64)

4,521,984

72,448 IPv4 Addresses
CIDR Description IP Num
50.204.101.0/24 Comcast Cable Communications, LLC 256
50.205.217.0/24 Comcast Cable Communications, LLC 256
50.216.229.0/24 Comcast Cable Communications, LLC 256
50.217.1.0/24 Comcast Cable Communications, LLC 256
50.217.207.0/24 Comcast Cable Communications, LLC 256
50.218.47.0/24 Comcast Cable Communications, LLC 256
50.219.12.0/22 Comcast Cable Communications, LLC 1024
50.220.111.0/24 Custom Computers (C07509687) 256
50.227.24.0/24 Comcast Cable Communications, LLC 256
50.228.113.0/24 Comcast Cable Communications, LLC 256
50.229.113.0/24 Comcast Cable Communications, LLC 256
50.229.114.0/24 Comcast Cable Communications, LLC 256
50.229.232.0/24 Comcast Cable Communications, LLC 256
50.229.233.0/24 Comcast Cable Communications, LLC 256
50.235.34.0/24 Comcast Cable Communications, LLC 256
141.104.0.0/24 Virginia Department of Education 256
141.104.0.0/16 Virginia Department of Education 65536
157.240.147.0/24 Facebook, Inc. 256
157.240.148.0/24 Facebook, Inc. 256
173.242.174.0/24 County of Henrico 256
198.90.112.0/22 WhiteSky Communications, LLC. 1024
204.194.47.0/24 Va. Dept. of Rehabilitative Services 256
205.223.19.0/24 Virginia State Lottery Department 256
CIDR Description IP NUMs(prefix /64)
2001:559:8a::/48 Comcast Cable Communications, LLC 65536
2001:559:c0::/48 Comcast Cable Communications, LLC 65536
2001:559:f7::/48 Comcast Cable Communications, LLC 65536
2001:559:220::/48 Comcast Cable Communications, LLC 65536
2001:559:243::/48 Comcast Cable Communications, LLC 65536
2001:559:280::/48 Comcast Cable Communications, LLC 65536
2001:559:37d::/48 Comcast Cable Communications, LLC 65536
2001:559:39d::/48 Comcast Cable Communications, LLC 65536
2001:559:3ac::/48 Comcast Cable Communications, LLC 65536
2001:559:3b9::/48 Comcast Cable Communications, LLC 65536
2001:559:3c8::/48 Comcast Cable Communications, LLC 65536
2001:559:40a::/48 Comcast Cable Communications, LLC 65536
2001:559:49a::/48 Comcast Cable Communications, LLC 65536
2001:559:49b::/48 Comcast Cable Communications, LLC 65536
2001:559:4b6::/48 Comcast Cable Communications, LLC 65536
2001:559:53c::/48 Comcast Cable Communications, LLC 65536
2001:559:5c9::/48 Comcast Cable Communications, LLC 65536
2001:559:5db::/48 Comcast Cable Communications, LLC 65536
2001:559:720::/48 Comcast Cable Communications, LLC 65536
2001:559:72b::/48 Comcast Cable Communications, LLC 65536
2001:559:73c::/48 Comcast Cable Communications, LLC 65536
2001:559:788::/48 Comcast Cable Communications, LLC 65536
2001:559:78a::/48 Comcast Cable Communications, LLC 65536
2001:559:79d::/48 Comcast Cable Communications, LLC 65536
2001:559:79e::/48 Comcast Cable Communications, LLC 65536
2001:559:7a7::/48 Comcast Cable Communications, LLC 65536
2001:559:7db::/48 Comcast Cable Communications, LLC 65536
2001:559:804c::/48 Comcast Cable Communications, LLC 65536
2001:559:81bf::/48 Comcast Cable Communications, LLC 65536
2001:559:81d7::/48 Comcast Cable Communications, LLC 65536
2001:559:81d8::/48 Comcast Cable Communications, LLC 65536
2001:559:8201::/48 Comcast Cable Communications, LLC 65536
2001:559:82fd::/48 Comcast Cable Communications, LLC 65536
2001:559:833e::/48 Comcast Cable Communications, LLC 65536
2001:559:8416::/48 Comcast Cable Communications, LLC 65536
2001:559:841c::/48 Comcast Cable Communications, LLC 65536
2001:559:8445::/48 Comcast Cable Communications, LLC 65536
2001:559:84a7::/48 Comcast Cable Communications, LLC 65536
2001:559:8535::/48 Comcast Cable Communications, LLC 65536
2001:559:85c1::/48 Comcast Cable Communications, LLC 65536
2001:559:85ff::/48 Comcast Cable Communications, LLC 65536
2001:559:8604::/48 Comcast Cable Communications, LLC 65536
2001:559:871a::/48 Comcast Cable Communications, LLC 65536
2001:559:875f::/48 Comcast Cable Communications, LLC 65536
2001:559:8773::/48 Comcast Cable Communications, LLC 65536
2001:559:87b2::/48 Comcast Cable Communications, LLC 65536
2001:559:c071::/48 Comcast Cable Communications, LLC 65536
2001:559:c0f6::/48 Comcast Cable Communications, LLC 65536
2001:559:c0f7::/48 Comcast Cable Communications, LLC 65536
2001:559:c0fa::/48 Comcast Cable Communications, LLC 65536
2001:559:c10a::/48 Comcast Cable Communications, LLC 65536
2001:559:c174::/48 Comcast Cable Communications, LLC 65536
2001:559:c1a5::/48 Comcast Cable Communications, LLC 65536
2001:559:c1ca::/48 Comcast Cable Communications, LLC 65536
2001:559:c28f::/48 Comcast Cable Communications, LLC 65536
2001:559:c290::/48 Comcast Cable Communications, LLC 65536
2001:559:c2a7::/48 Comcast Cable Communications, LLC 65536
2001:559:c344::/48 Comcast Cable Communications, LLC 65536
2001:559:c3e9::/48 Comcast Cable Communications, LLC 65536
2001:559:c458::/48 Comcast Cable Communications, LLC 65536
2001:559:c45f::/48 Comcast Cable Communications, LLC 65536
2001:559:c460::/48 Comcast Cable Communications, LLC 65536
2001:559:c495::/48 Comcast Cable Communications, LLC 65536
2001:559:c4c8::/48 Comcast Cable Communications, LLC 65536
2001:559:c4c9::/48 Comcast Cable Communications, LLC 65536
2001:559:c4db::/48 Comcast Cable Communications, LLC 65536
2001:559:c4f6::/48 Comcast Cable Communications, LLC 65536
2001:559:c515::/48 Comcast Cable Communications, LLC 65536
2001:559:c538::/48 Comcast Cable Communications, LLC 65536
AS Description Country/Region IPv4 NUMs IPv6 NUMs IPv4 IPv6
AS7922 COMCAST-7922 - Comcast Cable Communications, LLC, US United States 70,110,720 36,318,243,520,512 IPv4 IPv4 IPv6 IPv6
AS Description Country/Region IPv4 NUMs IPv6 NUMs IPv4 IPv6
AS54219 SCHAWK-INC - Matthews International Corporation, US United States 256 0 IPv4 IPv4
AS396083 ARVUS-160-84 - Framatome Inc., US United States 512 0 IPv4 IPv4
AS397039 WORLDSTRIDES, US United States 256 0 IPv4 IPv4
AS17381 AS-WSI-ECOM-WEST - Williams-Sonoma, US United States 3,072 0 IPv4 IPv4
AS22274 SMP-VIR - Standard Motor Products, Inc, US United States 256 0 IPv4 IPv4
AS40288 CFCU-AS - CONGRESSIONAL FEDERAL CREDIT UNION, US United States 512 0 IPv4 IPv4
AS40485 SSB - SANDY SPRING BANK, US United States 512 0 IPv4 IPv4
AS13952 NCI-58-13952 - New College Institute, US United States 256 0 IPv4 IPv4
AS36364 MHSNET - Mary Washington Hospital, Inc., US United States 768 0 IPv4 IPv4
AS394058 TELOSC-ASH - Telos Corporation, US United States 512 0 IPv4 IPv4
AS396452 LOUDOUN-WATER - Loudoun Water, US United States 256 0 IPv4 IPv4
AS400114 APOG-RBC - Apogee Telecom Inc., US United States 256 0 IPv4 IPv4
AS15297 EPLUS-ASN - EPLUS, Inc., US United States 3,072 65,536 IPv4 IPv4
AS19923 SHENANDOAH-UNIV - Shenandoah University, US United States 2,048 0 IPv4 IPv4
AS33265 LEEBHMG-ASN-33265 - Lee Enterprises, Incorporated, US United States 256 0 IPv4 IPv4
AS393591 GAMEWOODTECHNOLOGYGROUP - Gamewood Technology Group, Inc., US United States 2,560 0 IPv4 IPv4
AS398475 DRILLINGINFO-VIRGINIA - Drilling Info Inc., US United States 2,048 0 IPv4 IPv4
AS11679 STIHL-204-124-67 - Stihl Inc., US United States 768 0 IPv4 IPv4
AS11739 CHIRISA-TECHNOLOGY-PARKS-01 - Digital Fortress, Inc., US United States 768 0 IPv4 IPv4
AS15173 NEWMA-11 - Newmarket Corporation, US United States 65,792 0 IPv4 IPv4
AS46643 VIRGINIA-COLLEGE-SAVINGS-PLAN - Virginia College Savings Plan, US United States 256 0 IPv4 IPv4
AS393861 INOVA-PRIMARYASN-01 - Inova Health System Foundation, US United States 3,072 0 IPv4 IPv4
AS395505 IMANAGE - iManage, LLC, US United States 2,304 0 IPv4 IPv4
AS399099 PCPS-ASN - petersburg city public schools, US United States 256 0 IPv4 IPv4
AS14583 VITA-VSP-1 - Virginia Information Technologies Agency (VITA), US United States 1,024 0 IPv4 IPv4
AS23209 VHDA20011260123220 - Virginia Housing Development Authority, US United States 512 0 IPv4 IPv4
AS54883 CORVA - City of Richmond, Virginia, US United States 512 0 IPv4 IPv4
AS62971 COUNTY-OF-CHESTERFIELD-VA - County of Chesterfield, US United States 256 0 IPv4 IPv4
AS393613 VACU-ASN-1 - Virginia Credit Union, Inc., US United States 512 0 IPv4 IPv4
AS395772 AHC-AS - Augusta Health Care, Inc, US United States 768 0 IPv4 IPv4
AS399232 SETON-HOME - Seton Home Study School, US United States 256 0 IPv4 IPv4
AS399607 LCPS-VA - Louisa County Public Schools, US United States 256 0 IPv4 IPv4
AS2134 GSVNET-AS - Santander Global Technology, S.L.U, ES Spain 99,072 0 IPv4 IPv4
AS10794 BANKAMERICA - Bank of America, National Association, US United States 121,344 0 IPv4 IPv4
AS36244 SVEC - Shenandoah Valley Electric Cooperative, US United States 512 0 IPv4 IPv4
AS63468 INFINITTNA - Infinitt North America, Inc., US United States 512 0 IPv4 IPv4
AS54391 CRUTCHFIELD - Crutchfield New Media LLC, US United States 512 131,072 IPv4 IPv4 IPv6 IPv6
AS13335 CLOUDFLARENET - Cloudflare, Inc., US United States 1,721,344 43,952,373,760 IPv4 IPv4 IPv6 IPv6
AS14538 HEC-NETWORK - Harrisonburg Electric Commission, US United States 256 0 IPv4 IPv4
AS30299 THE-MARTIN-AGENCY-HQ - THE MARTIN AGENCY, US United States 256 0 IPv4 IPv4
AS32540 HP-HOOD - HP Hood, US United States 768 0 IPv4 IPv4
AS33296 PIEDMONT-BROADBAND - Piedmont Broadband Corporation, US United States 1,280 268,435,456 IPv4 IPv4
AS40400 EDC-MIDDLETOWN - Middletown Data Center, US United States 1,024 0 IPv4 IPv4
AS40641 MGWTEL - MGW Telephone Company, Inc., US United States 5,376 4,294,967,296 IPv4 IPv4 IPv6 IPv6
AS395441 EDGECONNEX-ASN - EdgeConneX, INC, US United States 512 0 IPv4 IPv4
IP Address Domain NUMs Domains
50.204.101.53 1 ofx.mydccu.org
50.204.101.60 1 mydccu.org
50.204.101.61 2 mydccu.org
50.204.101.62 2 mb.mydccu.org
50.204.101.63 2 mb.mydccu.org
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:  [email protected]
OrgTechRef:    https://rdap.arin.net/registry/entity/IC161-ARIN

OrgRoutingHandle: ROUTI25-ARIN
OrgRoutingName:   Routing
OrgRoutingPhone:  +1-856-792-2300 
OrgRoutingEmail:  [email protected]
OrgRoutingRef:    https://rdap.arin.net/registry/entity/ROUTI25-ARIN

OrgAbuseHandle: NAPO-ARIN
OrgAbuseName:   Network Abuse and Policy Observance
OrgAbusePhone:  +1-888-565-4329 
OrgAbuseEmail:  [email protected]
OrgAbuseRef:    https://rdap.arin.net/registry/entity/NAPO-ARIN