AS21508 Comcast Cable Communications, LLC

Country of Origin:

United States

Prefixes Originated (all): 255
Prefixes Originated (v4): 165
Prefixes Originated (v6): 90

Prefixes Announced (all): 375
Prefixes Announced (v4): 281
Prefixes Announced (v6): 94

RPKI Originated Valid (all): 239
RPKI Originated Valid (v4): 150
RPKI Originated Valid (v6): 89

RPKI Originated Invalid (all): 8
RPKI Originated Invalid (v4): 7
RPKI Originated Invalid (v6): 1

BGP Peers Observed (all): 52
BGP Peers Observed (v4): 52
BGP Peers Observed (v6): 4

IPs Originated (v4): 1,265,664
AS Paths Observed (v4): 878
AS Paths Observed (v6): 464

Average AS Path Length (all): 4.235
Average AS Path Length (v4): 4.289
Average AS Path Length (v6): 4.131

AS21508 IPv4 Peers

ASN	Name
AS7922	Comcast Cable Communications, LLC

AS21508 IPv6 Peers

ASN	Name
AS7922	Comcast Cable Communications, LLC

AS21508 IPv4 Peer Count

AS21508 IPv6 Peer Count

AS21508 IPv4 Prefixes Announced

AS21508 IPv6 Prefixes Announced

AS21508 IPv4 Prefixes Originated

AS21508 IPv6 Prefixes Originated

AS21508 IPv4 Route Propagation

AS21508 IPv6 Route Propagation

Prefix	Description
23.25.96.0/19	Comcast Cable Communications, LLC
23.25.186.0/23	Comcast Cable Communications, LLC
23.31.96.0/20	Comcast Cable Communications, LLC
24.124.151.0/24	Comcast Cable Communications, LLC
24.124.162.0/23	Comcast Cable Communications, LLC
24.124.248.0/21	Comcast Cable Communications, LLC
24.131.0.0/20	Comcast Cable Communications Holdings, Inc (C02609445)
50.73.8.0/22	Comcast Cable Communications, LLC
50.73.224.0/20
50.77.72.0/21	Comcast Cable Communications, LLC
50.78.232.0/21	Comcast Cable Communications, LLC
50.184.128.0/19	Comcast Cable Communications, LLC
50.186.32.0/19	Comcast Cable Communications, LLC
50.189.192.0/18
50.193.246.0/23	Comcast Cable Communications, LLC
50.199.16.0/20	Comcast Cable Communications, LLC
50.204.101.0/24	Comcast Cable Communications, LLC
50.205.217.0/24	Comcast Cable Communications, LLC
50.210.0.0/20
50.211.32.0/19	Comcast Cable Communications, LLC
50.215.32.0/19
50.216.229.0/24
50.217.1.0/24	Comcast Cable Communications, LLC
50.217.207.0/24	Comcast Cable Communications, LLC
50.218.47.0/24	Comcast Cable Communications, LLC
50.219.12.0/22	Comcast Cable Communications, LLC
50.219.193.0/24	Comcast Cable Communications, LLC
50.219.222.0/24
50.219.229.0/24
50.220.111.0/24	Custom Computers (C07509687)
50.227.24.0/24	Comcast Cable Communications, LLC
50.228.113.0/24	Comcast Cable Communications, LLC
50.229.113.0/24	Comcast Cable Communications, LLC
50.229.114.0/24	Comcast Cable Communications, LLC
50.229.232.0/24	Comcast Cable Communications, LLC
50.229.233.0/24	Comcast Cable Communications, LLC
50.234.62.0/23	Comcast Cable Communications, LLC
50.235.34.0/24	Comcast Cable Communications, LLC
50.237.96.0/24	Comcast Cable Communications, LLC
50.240.80.0/20	Comcast Cable Communications, LLC
50.242.32.0/19	Comcast Cable Communications, LLC
50.245.224.0/19	Comcast Cable Communications, LLC
50.251.112.0/20	Comcast Cable Communications, LLC
50.253.208.0/20	Comcast Cable Communications, LLC
64.139.66.0/24	Comcast Cable Communications, LLC
64.139.70.0/24	Comcast Cable Communications, LLC
64.139.79.0/24	Comcast Cable Communications, LLC
64.139.90.0/24	Comcast Cable Communications, LLC
66.208.224.0/23	Comcast Cable Communications, LLC
66.208.230.0/24	Comcast Cable Communications, LLC
66.208.234.0/24	Comcast Cable Communications, LLC
67.163.96.0/19	Comcast Cable Communications, Inc. (C01543873)
67.166.160.0/19	Comcast Cable Communications, Inc. (C01600487)
67.172.192.0/19	Comcast Cable Communications, LLC
67.174.64.0/20	Comcast Cable Communications (C01615143)
67.187.0.0/19	Comcast Cable Communications, Inc. (C01520263)
68.85.70.0/23	Comcast Cable Communications, LLC
68.85.214.0/24	Comcast Cable Communications, Inc. (C01616542)
68.85.226.0/24	Comcast Cable Communications, Inc. (C01621977)
68.86.14.0/24	Comcast Cable Communications, Inc. (C01616570)
68.86.24.0/24	Comcast Cable Communications, Inc. (C01616570)
68.86.124.0/22	Comcast Cable Communications, Inc. (C01616566)
68.86.172.0/22	Comcast Cable Communications, Inc. (C01616569)
68.86.200.0/24	Comcast Cable Communications, Inc. (C01616569)
68.87.3.0/24	Comcast Cable Communications, Inc. (C01520065)
69.139.165.0/24	Comcast Cable Communications, Inc (C00762096)
69.139.186.0/24	Comcast Cable Communications, Inc (C00762094)
69.139.206.0/24	Comcast Cable Communications, Inc. (C02520192)
69.139.223.0/24	Comcast Cable Communications, LLC
69.241.48.0/23	Comcast Cable Communications, Inc. (C01623945)
69.241.85.0/24	Comcast Cable Communications, Inc. (C01543874)
69.243.208.0/20	Comcast Cable Communications, Inc. (C01336519)
69.244.224.0/20	Comcast Cable Communications, Inc. (C01336518)
69.252.18.0/23	Comcast Cable Communications, Inc. (C01520264)
70.88.24.0/23
70.88.164.0/24	Comcast Cable Communications, LLC
70.88.168.0/23	Comcast Cable Communications, LLC
70.88.184.0/21	Comcast Cable Communications, LLC
70.89.232.0/21	Comcast Cable Communications, LLC
70.91.162.0/24	Comcast Cable Communications, LLC
71.24.32.0/19	Comcast Cable Communications, LLC
71.56.160.0/19	Comcast Cable Communications Holdings, Inc (C02607882)
71.57.192.0/19	Comcast Cable Communications Holdings, Inc (C02607886)
71.62.0.0/16	Comcast Cable Communications Holdings, Inc (C02607898)
71.63.0.0/17	Comcast Cable Communications Holdings, Inc (C02607899)
71.197.0.0/20	Comcast Cable Communications, IP Services (C01249240)
71.206.128.0/18	Comcast Cable Communications, IP Services (C01383484)
71.207.128.0/19	Comcast Cable Communications, Inc. (C01520262)
73.12.0.0/17	Comcast IP Services, L.L.C. (C05317702)
73.31.0.0/16	Comcast IP Services, L.L.C. (C05456471)
73.40.0.0/17	Comcast Cable Communications, LLC
73.99.0.0/16	Comcast IP Services, L.L.C. (C06050265)
73.147.0.0/16	Comcast IP Services, L.L.C. (C05647262)
73.148.0.0/17	Comcast IP Services, L.L.C. (C05647261)
73.152.0.0/16	Comcast Cable Communications, LLC
73.171.0.0/17	Comcast IP Services, L.L.C. (C05217279)
73.177.128.0/17	Comcast IP Services, L.L.C. (C04861633)
73.216.0.0/16
73.251.0.0/16	Comcast Cable Communications, LLC
74.92.186.0/23	Comcast Cable Communications, LLC
74.92.255.0/24	Comcast Cable Communications, LLC
74.93.116.0/22	Comcast Cable Communications, LLC
74.94.208.0/21	Comcast Cable Communications, LLC
74.95.96.0/22	Comcast Cable Communications, LLC
75.75.0.0/18	Comcast Cable Communications Holdings, Inc (C02610786)
75.75.64.0/21	Comcast Cable Communications Holdings, Inc (C02609459)
75.75.80.0/20	Comcast Cable Communications Holdings, Inc (C02609461)
75.75.96.0/19	Comcast Cable Communications Holdings, Inc (C02611439)
75.144.34.0/23	Comcast Cable Communications, LLC
75.145.196.0/22	Comcast Cable Communications, LLC
75.145.204.0/22	Comcast Cable Communications, LLC
75.145.240.0/21	Comcast Cable Communications, LLC
75.146.16.0/20	Comcast Cable Communications, LLC
75.146.87.0/24	Comcast Cable Communications, LLC
75.150.48.0/20	Comcast Cable Communications, LLC
76.26.64.0/19	Comcast Cable Communications, Inc. (C01616565)
76.27.160.0/19	Comcast Cable Communications, Inc. (C01622089)
76.104.0.0/17	Comcast Cable Communications, Inc. (C01618414)
76.111.176.0/20	Comcast Cable Communications, Inc. (C01616540)
76.120.192.0/18	Comcast Cable Communications, Inc. (C01743399)
76.123.0.0/18	Comcast Cable Communications, Inc. (C01737776)
96.75.192.0/19	Comcast Cable Communications, LLC
96.82.0.0/20	Comcast Cable Communications, LLC
96.82.24.0/21	Comcast Cable Communications, LLC
96.84.224.0/20	Comcast Cable Communications, LLC
96.85.32.0/20	Comcast Cable Communications, LLC
96.89.0.0/19	Comcast Cable Communications, LLC
96.94.208.0/20
96.96.176.0/21
96.108.106.0/23	Comcast Cable Communications, LLC
96.108.129.0/24	Comcast Cable Communications, LLC
96.108.130.0/23	Comcast Cable Communications, LLC
96.108.140.0/23	Comcast Cable Communications, LLC
96.109.65.0/24
96.109.165.0/24	Comcast Cable Communications, LLC
96.110.123.0/24
96.110.200.0/22	Comcast Cable Communications, LLC
96.114.56.0/23	Comcast Cable Communications, LLC
96.124.244.0/22
96.208.0.0/21
96.216.16.0/22
96.216.88.0/22
98.244.64.0/18	Comcast Cable Communications, Inc. (C02010586)
98.249.0.0/18	Comcast Cable Communications, Inc. (C02191482)
141.104.0.0/16	Virginia Department of Education
157.240.147.0/24	Various Registries (Maintained by ARIN)
157.240.148.0/24	Facebook, Inc.
162.151.58.0/23	Comcast Cable Communications, LLC
162.151.162.0/23	Comcast Cable Communications, LLC
162.151.255.0/24	Comcast Cable Communications, LLC
173.14.112.0/20	Comcast Cable Communications, LLC
173.14.193.0/24	Comcast Cable Communications, LLC
173.15.192.0/20	Comcast Cable Communications, LLC
173.163.192.0/20	Comcast Cable Communications, LLC
173.167.32.0/20	Comcast Cable Communications, LLC
173.167.48.0/22	Comcast Cable Communications, LLC
173.167.52.0/22	Comcast Cable Communications, LLC
173.167.80.0/22	Comcast Cable Communications, LLC
173.242.174.0/24
174.53.64.0/19	Comcast Cable Communications, Inc. (C02431736)
174.179.0.0/16
192.100.76.0/24	Westlab Consulting
198.90.112.0/22	WhiteSky Communications, LLC.
204.194.47.0/24	Va. Dept. of Rehabilitative Services
205.223.19.0/24	Virginia State Lottery Department

Prefix	Description
2001:558:180::/44	Comcast Cable Communications, LLC
2001:558:230::/44	Comcast Cable Communications, LLC
2001:558:701a::/48	Comcast Cable Communications, LLC
2001:558:fe30::/48
2001:559:8a::/48	Comcast Cable Communications, LLC
2001:559:c0::/48	Comcast Cable Communications, LLC
2001:559:f7::/48	Comcast Cable Communications, LLC
2001:559:220::/48	Comcast Cable Communications, LLC
2001:559:243::/48	Comcast Cable Communications, LLC
2001:559:280::/48	Comcast Cable Communications, LLC
2001:559:37d::/48
2001:559:39d::/48	Comcast Cable Communications, LLC
2001:559:3ac::/48	Comcast Cable Communications, LLC
2001:559:3b9::/48	Comcast Cable Communications, LLC
2001:559:3c8::/48
2001:559:40a::/48	Comcast Cable Communications, LLC
2001:559:49a::/48	Comcast Cable Communications, LLC
2001:559:49b::/48
2001:559:4b6::/48	Comcast Cable Communications, LLC
2001:559:53c::/48	Comcast Cable Communications, LLC
2001:559:54c::/48	Comcast Cable Communications, LLC
2001:559:5bb::/48	Comcast Cable Communications, LLC
2001:559:5c9::/48	Comcast Cable Communications, LLC
2001:559:5da::/48
2001:559:5db::/48
2001:559:720::/48	Comcast Cable Communications, LLC
2001:559:72b::/48
2001:559:73c::/48	Comcast Cable Communications, LLC
2001:559:76b::/48	Comcast Cable Communications, LLC
2001:559:788::/48	Comcast Cable Communications, LLC
2001:559:78a::/48
2001:559:79d::/48	Comcast Cable Communications, LLC
2001:559:79e::/48	Comcast Cable Communications, LLC
2001:559:7a7::/48	Comcast Cable Communications, LLC
2001:559:7db::/48
2001:559:7e8::/48	Comcast Cable Communications, LLC
2001:559:804c::/48	Comcast Cable Communications, LLC
2001:559:8060::/48	Comcast Cable Communications, LLC
2001:559:81bf::/48	Comcast Cable Communications, LLC
2001:559:81d7::/48
2001:559:81d8::/48
2001:559:8201::/48
2001:559:822a::/48	Comcast Cable Communications, LLC
2001:559:824b::/48	Comcast Cable Communications, LLC
2001:559:82fd::/48
2001:559:833e::/48	Comcast Cable Communications, LLC
2001:559:8358::/48	Comcast Cable Communications, LLC
2001:559:8416::/48	Comcast Cable Communications, LLC
2001:559:841c::/48
2001:559:8445::/48	Comcast Cable Communications, LLC
2001:559:84a7::/48	Comcast Cable Communications, LLC
2001:559:8535::/48	Comcast Cable Communications, LLC
2001:559:85c1::/48	Comcast Cable Communications, LLC
2001:559:85ff::/48
2001:559:8604::/48
2001:559:871a::/48
2001:559:875f::/48	Comcast Cable Communications, LLC
2001:559:8773::/48
2001:559:87b2::/48
2001:559:87e8::/48
2001:559:c071::/48
2001:559:c0f6::/48	Comcast Cable Communications, LLC
2001:559:c0f7::/48	Comcast Cable Communications, LLC
2001:559:c0fa::/48	Comcast Cable Communications, LLC
2001:559:c10a::/48	Comcast Cable Communications, LLC
2001:559:c174::/48	Comcast Cable Communications, LLC
2001:559:c1a5::/48	Comcast Cable Communications, LLC
2001:559:c1ca::/48	Comcast Cable Communications, LLC
2001:559:c28f::/48	Comcast Cable Communications, LLC
2001:559:c290::/48	Comcast Cable Communications, LLC
2001:559:c2a5::/48
2001:559:c2a7::/48	Comcast Cable Communications, LLC
2001:559:c2ae::/48	Comcast Cable Communications, LLC
2001:559:c344::/48	Comcast Cable Communications, LLC
2001:559:c3cf::/48	Comcast Cable Communications, LLC
2001:559:c3e9::/48	Comcast Cable Communications, LLC
2001:559:c458::/48
2001:559:c45f::/48
2001:559:c460::/48
2001:559:c495::/48
2001:559:c4c8::/48
2001:559:c4c9::/48
2001:559:c4db::/48	Comcast Cable Communications, LLC
2001:559:c4f6::/48	Comcast Cable Communications, LLC
2001:559:c515::/48	Comcast Cable Communications, LLC
2001:559:c538::/48	Comcast Cable Communications, LLC
2001:55c:6000::/35	Comcast Cable Communications, LLC
2601:5c0::/26	Comcast Cable Communications, LLC
2603:25c0::/26	Comcast Cable Communications, LLC
2603:3021::/32	Comcast Cable Communications, LLC

Rank	Description	IPv6	Peer
1	Comcast Cable Communications, LLC	X	AS7922
2	MGW Telephone Company, Inc.	X	AS40641
3	Harrisonburg Electric Commission		AS14538
4	AREVA Inc.		AS396083
5	Virginia State University		AS395527
6	Stihl Inc.		AS11679
7	Standard Motor Products, Inc		AS22274
8	Apogee Telecom Inc.		AS400114
9	WorldStrides		AS397039
10	petersburg city public schools		AS399099
11	nexVortex		AS46847
12	Virginia College Savings Plan		AS46643
13	EdgeConneX, INC		AS395441
14	Santander Global Technology, S.L.U		AS2134
15	County of Chesterfield		AS62971
16	THE MARTIN AGENCY		AS30299
17	Williams-Sonoma		AS17381
18	Comcast Cable Communications, LLC		AS396017
19	Drilling Info Inc.		AS398475
20	Piedmont Broadband, Inc		AS33296
21	Inova Health System Foundation		AS393861
22	Shenandoah University		AS19923
23	CONGRESSIONAL FEDERAL CREDIT UNION		AS40288
24	Newmarket Corporation		AS15173
25	Loudoun Water		AS396452
26	Virginia Credit Union, Inc.		AS393613
27	intelivant consulting, llc		AS21863
28	Virginia Information Technologies Agency (VITA)		AS14583
29	Crutchfield New Media LLC	X	AS54391
30	HP Hood		AS32540
31	Telos Corporation		AS394058
32	Virginia Farm Bureau Mutual Insurance Company		AS40323
33	Matthews International Corporation		AS54219
34	Middletown Data Center		AS40400
35	Mednax Services, Inc.		AS18478
36	Seton Home Study School		AS399232
37	Virginia Housing Development Authority		AS23209
38	Merit Medical Systems, Inc		AS395444
39	Allianz Technology SE		AS8360
40	Gamewood Technology Group, Inc.		AS393591
41	City of Richmond, Virginia		AS54883
42	Augusta Health Care, Inc		AS395772
43	New College Institute		AS13952
44	VCU HEALTH SYSTEM AUTHORITY		AS27326
45	LITTLER MENDELSON, P.C.		AS393415
46	Mary Washington Hospital, Inc.		AS36364
47	SANDY SPRING BANK		AS40485
48	iManage, LLC		AS395505
49	Infinitt North America, Inc.		AS63468
50	Shenandoah Valley Electric Cooperative		AS36244
51	Sentara Healthcare		AS27336
52	Cloudflare, Inc.	X	AS13335

Rank	Description	IPv4	Peer
1	Comcast Cable Communications, LLC	X	AS7922
2	Crutchfield New Media LLC	X	AS54391
3	MGW Telephone Company, Inc.	X	AS40641
4	Cloudflare, Inc.	X	AS13335


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

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

OrgRoutingHandle: ROUTI25-ARIN
OrgRoutingName:   Routing
OrgRoutingPhone:  +1-856-792-2300 
OrgRoutingEmail:  routing@comcast.com
OrgRoutingRef:    https://rdap.arin.net/registry/entity/ROUTI25-ARIN

LEVEL3

aut-num: AS21508 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 US admin-c: IC161-ARIN tech-c: IC161-ARIN remarks: First Pass mnt-by: MNT-CMCS changed: tony_tauber@spam-free.cable.comcast.com 20070517 source: LEVEL3