AS21508 Comcast Cable Communications, LLC

Looking Glass:

https://bgp.he.net/lg/21508

Country of Origin:

United States

Prefixes Originated (all): 229
Prefixes Originated (v4): 157
Prefixes Originated (v6): 72

Prefixes Announced (all): 350
Prefixes Announced (v4): 272
Prefixes Announced (v6): 78

RPKI Originated Valid (all): 222
RPKI Originated Valid (v4): 150
RPKI Originated Valid (v6): 72

RPKI Originated Invalid (all): 0
RPKI Originated Invalid (v4): 0
RPKI Originated Invalid (v6): 0

BGP Peers Observed (all): 48
BGP Peers Observed (v4): 47
BGP Peers Observed (v6): 6

IPs Originated (v4): 1,280,256
AS Paths Observed (v4): 1,495
AS Paths Observed (v6): 1,034

Average AS Path Length (all): 4.573
Average AS Path Length (v4): 4.613
Average AS Path Length (v6): 4.516

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

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AS21508 IPv6 Route Propagation

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Prefix	Description	Visibility
Loading Prefixes...

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
50.73.8.0/22	Comcast Cable Communications, LLC
50.73.224.0/20	Comcast Cable Communications, LLC
50.77.72.0/21	American Registry for Internet Numbers
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	Comcast Cable Communications, LLC
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	Comcast Cable Communications, LLC
50.211.32.0/19	Comcast Cable Communications, LLC
50.215.32.0/19	Comcast Cable Communications, LLC
50.216.229.0/24	Comcast Cable Communications, LLC
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
50.228.113.0/24	Comcast Cable Communications, LLC
50.229.113.0/24	Comcast Cable Communications, LLC
50.229.114.0/24	Comcast Cable Communications, LLC
50.235.34.0/24	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
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.
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
67.187.0.0/19	Comcast Cable Communications, Inc. (C01520263)
68.85.70.0/23	Comcast Cable Communications, LLC (C11414327)
68.85.214.0/24	Comcast Cable Communications, Inc.
68.85.226.0/24	Comcast Cable Communications, LLC (C11414325)
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.
68.86.200.0/24	Comcast Cable Communications, Inc.
68.87.3.0/24	Comcast Cable Communications, Inc.
69.139.165.0/24	Comcast Cable Communications, LLC (C11414330)
69.139.186.0/24	Comcast Cable Communications, LLC (C11414330)
69.139.206.0/24	Comcast Cable Communications, LLC (C11414332)
69.139.223.0/24	Comcast Cable Communications, LLC (C11414332)
69.241.48.0/23	Comcast Cable Communications, Inc.
69.241.85.0/24	Comcast Cable Communications, LLC (C11398900)
69.243.208.0/20	Comcast Cable Communications, Inc.
69.244.224.0/20	Comcast Cable Communications, Inc.
69.252.18.0/23	Comcast Cable Communications, Inc. (C01520264)
70.88.24.0/23	Comcast Cable Communications, LLC
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
71.57.192.0/19	Comcast Cable Communications Holdings, Inc
71.62.0.0/16	Comcast Cable Communications Holdings, Inc
71.63.0.0/17	Comcast Cable Communications Holdings, Inc
71.197.0.0/20	Comcast Cable Communications, IP Services
71.206.128.0/18	Comcast Cable Communications, IP Services (C01383484)
71.207.128.0/19	Comcast Cable Communications, Inc.
73.12.0.0/17	Comcast IP Services, L.L.C.
73.31.0.0/16	Comcast IP Services, L.L.C.
73.40.0.0/17	Comcast Cable Communications, LLC
73.99.0.0/16	Comcast IP Services, L.L.C.
73.147.0.0/16	Comcast IP Services, L.L.C.
73.148.0.0/17	Comcast IP Services, L.L.C.
73.152.0.0/16	Comcast Cable Communications, LLC
73.171.0.0/17
73.177.128.0/17	Comcast IP Services, L.L.C. (C04861633)
73.216.0.0/16	Comcast Cable Communications, LLC
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
75.75.64.0/21	Comcast Cable Communications Holdings, Inc
75.75.80.0/20	Comcast Cable Communications Holdings, Inc
75.75.96.0/19	Comcast Cable Communications Holdings, Inc
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.
76.27.160.0/19	Comcast Cable Communications, Inc. (C01622089)
76.104.0.0/17	Comcast Cable Communications, Inc.
76.111.176.0/20	Comcast Cable Communications, Inc.
76.120.192.0/18	Comcast Cable Communications, Inc.
76.123.0.0/18	Comcast Cable Communications, Inc.
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	Comcast Cable Communications, LLC
96.96.176.0/21	Comcast Cable Communications, LLC
96.108.106.0/23	Comcast Cable Communications, LLC (C11414348)
96.108.129.0/24	Comcast Cable Communications, LLC (C11414349)
96.108.130.0/23	Comcast Cable Communications, LLC (C11414349)
96.108.140.0/23	Comcast Cable Communications, LLC
96.109.65.0/24	Comcast Cable Communications, LLC (C11399273)
96.109.165.0/24	Comcast Cable Communications, LLC (C11399273)
96.109.200.0/22	Comcast Cable Communications, LLC (C11399273)
96.110.123.0/24	Comcast Cable Communications, LLC
96.110.200.0/22	Comcast Cable Communications, LLC (C11414350)
96.114.56.0/23	Comcast Cable Communications, LLC (C11398898)
96.124.244.0/22	Comcast Cable Communications, LLC (C10748396)
96.208.0.0/21	Comcast Cable Communications, LLC
96.216.16.0/22	Comcast Cable Communications, LLC (C11414356)
96.216.88.0/22	Comcast Cable Communications, LLC (C11414356)
98.244.64.0/18	Comcast Cable Communications, Inc.
98.249.0.0/18	Comcast Cable Communications, Inc.
141.104.0.0/16	Virginia Department of Education
157.240.147.0/24	Facebook, Inc.
157.240.148.0/24	Facebook, Inc.
162.151.58.0/23	Comcast Cable Communications, LLC (C11414333)
162.151.162.0/23	Various Registries (Maintained by ARIN)
162.151.255.0/24	Comcast Cable Communications, LLC (C11399266)
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	County of Henrico
174.53.64.0/19	Comcast Cable Communications, Inc.
174.179.0.0/16	Comcast Cable Communications, LLC
184.115.0.0/18
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	Visibility
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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	Comcast Cable Communications, LLC
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	Comcast Cable Communications, LLC
2001:559:3ac::/48	Comcast Cable Communications, LLC
2001:559:3b9::/48	Comcast Cable Communications, LLC
2001:559:3c8::/48	Comcast Cable Communications, LLC
2001:559:40a::/48	Comcast Cable Communications, LLC
2001:559:49a::/48	Comcast Cable Communications, LLC
2001:559:49b::/48	Comcast Cable Communications, LLC
2001:559:53c::/48	Comcast Cable Communications, LLC
2001:559:5c9::/48	Comcast Cable Communications, LLC
2001:559:5db::/48	Comcast Cable Communications, LLC
2001:559:72b::/48	Comcast Cable Communications, LLC
2001:559:73c::/48	Comcast Cable Communications, LLC
2001:559:788::/48	Comcast Cable Communications, LLC
2001:559:78a::/48	Comcast Cable Communications, LLC
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	Comcast Cable Communications, LLC
2001:559:804c::/48	Comcast Cable Communications, LLC
2001:559:81bf::/48	Comcast Cable Communications, LLC
2001:559:81d7::/48	Comcast Cable Communications, LLC
2001:559:81d8::/48	Comcast Cable Communications, LLC
2001:559:8201::/48	Comcast Cable Communications, LLC
2001:559:82fd::/48	Comcast Cable Communications, LLC
2001:559:833e::/48	Comcast Cable Communications, LLC
2001:559:8416::/48	Comcast Cable Communications, LLC
2001:559:841c::/48	Comcast Cable Communications, LLC
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	Comcast Cable Communications, LLC
2001:559:8604::/48	Comcast Cable Communications, LLC
2001:559:871a::/48	Comcast Cable Communications, LLC
2001:559:875f::/48	Comcast Cable Communications, LLC
2001:559:8773::/48	Comcast Cable Communications, LLC
2001:559:87b2::/48	Comcast Cable Communications, LLC
2001:559:c071::/48	Comcast Cable Communications, LLC
2001:559:c0f6::/48	Comcast Cable Communications, LLC
2001:559:c0f7::/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:c2a7::/48	Comcast Cable Communications, LLC
2001:559:c344::/48	Comcast Cable Communications, LLC
2001:559:c3e9::/48	Comcast Cable Communications, LLC
2001:559:c458::/48	Comcast Cable Communications, LLC
2001:559:c45f::/48	Comcast Cable Communications, LLC
2001:559:c460::/48	Comcast Cable Communications, LLC
2001:559:c4c8::/48	Comcast Cable Communications, LLC
2001:559:c4c9::/48	Comcast Cable Communications, LLC
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
2603:308a::/32

Bogon Prefixes
Prefix	Type	Status

Rank	Description	IPv6	Peer
1	Comcast Cable Communications, LLC	X	AS7922
2	petersburg city public schools		AS399099
3	THE MARTIN AGENCY		AS30299
4	VCU HEALTH SYSTEM AUTHORITY		AS27326
5	Standard Motor Products, Inc		AS22274
6	Gannet Fleming, Inc.		AS27341
7	Framatome Inc.		AS396083
8	Virginia Information Technologies Agency (VITA)		AS14583
9	Santander Global Technology and Operations, S.L.		AS2134
10	Virginia Housing Development Authority		AS23209
11	Newmarket Corporation		AS15173
12	Google LLC		AS36040
13	Virginia Credit Union, Inc.		AS393613
14	Cloudflare, Inc.	X	AS13335
15	LITTLER MENDELSON, P.C.		AS393415
16	Infinitt North America, Inc.		AS63468
17	Loudoun Water		AS396452
18	WSP	X	AS397190
19	Shenandoah Valley Electric Cooperative		AS36244
20	Digital Fortress, Inc.		AS11739
21	Crutchfield New Media LLC	X	AS54391
22	City of Richmond, Virginia		AS54883
23	Seton Home Study School		AS399232
24	Williams-Sonoma		AS17381
25	Quest		AS19404
26	Bank of America, National Association		AS10794
27	Shenandoah University		AS19923
28	Telos Corporation		AS394058
29	EPLUS, Inc.		AS15297
30	MGW Telephone Company, Inc.	X	AS40641
31	WorldStrides		AS397039
32	Mary Washington Hospital, Inc.		AS36364
33	Louisa County Public Schools		AS399607
34	HP Hood		AS32540
35			AS395527
36	Augusta Health Care, Inc		AS395772
37	County of Chesterfield		AS62971
38	EdgeConneX, INC		AS395441
39	Stihl Inc.		AS11679
40	County of Henrico		AS18773
41	Matthews International Corporation		AS54219
42	UNIVERSAL HEALTH SERVICES		AS397483
43	Berkshire Hathaway Energy Company		AS399938
44	Virginia College Savings Plan		AS46643
45	Gamewood Technology Group, Inc.		AS393591
46	Drilling Info Inc.		AS398475
47	Apogee Telecom Inc.		AS400114

Rank	Description	IPv4	Peer
1	Comcast Cable Communications, LLC	X	AS7922
2	MGW Telephone Company, Inc.	X	AS40641
3	WSP	X	AS397190
4	Crutchfield New Media LLC	X	AS54391
5	Cloudflare, Inc.	X	AS13335
6	TurnAround Factor, Inc.		AS394276

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