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Autonomous System details for AS21508

AS21508
Comcast Cable Communications, LLC • comcast.com

AS21508 — Comcast Cable Communications, LLC

AS Name
COMCAST-21508
Country
United States (US)
Website
Number of IPv4
70,400
Number of IPv6
7.37 × 1025
ASN type
ISP
Status
Assigned
Registry
ARIN
Allocated
May 16, 2001
Last updated
January 25, 2021

IP Ranges

17 IPv4 prefixes, 61 IPv6 prefixes
Prefix Company Number of IPs
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
50.228.113.0/24 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
50.235.34.0/24 Comcast Cable Communications, LLC 256
141.104.0.0/16 Virginia Department of Education 65,536
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. 1,024
204.194.47.0/24 Va. Dept. of Rehabilitative Services 256
205.223.19.0/24 Virginia State Lottery Department 256
2001:559:8a::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:c0::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:f7::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:220::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:243::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:280::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:37d::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:3ac::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:3b9::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:3c8::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:40a::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:49a::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:49b::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:53c::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:5c9::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:5db::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:72b::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:73c::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:788::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:78a::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:79d::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:79e::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:7a7::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:7db::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:804c::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:81bf::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:81d7::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:81d8::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:8201::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:82fd::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:833e::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:8416::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:841c::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:8445::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:8535::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:85c1::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:85ff::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:8604::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:871a::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:875f::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:8773::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:87b2::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:c071::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:c0f6::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:c0f7::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:c10a::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:c174::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:c1a5::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:c1ca::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:c28f::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:c290::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:c2a7::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:c344::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:c3e9::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:c458::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:c45f::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:c460::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:c4db::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:c4f6::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:c515::/48 Comcast Cable Communications, LLC 1.21 × 1024
2001:559:c538::/48 Comcast Cable Communications, LLC 1.21 × 1024

IP ranges are the different blocks of IP addresses advertised by an Autonomous System (AS). These ranges can be used by the same organization operating the AS, or by different organizations.

Peers of AS21508

0 peers

AS21508 has no peers recorded.

Peering is a direct, often free, traffic exchange between Autonomous Systems (ASNs). They share routes only to their own networks and customers, making connections faster and cheaper for that specific traffic, without providing full internet access to each other.

Upstreams of AS21508

1 upstreams
AS7922

AS21508 uses these Autonomous Systems as its upstreams.

An upstream (or transit provider) is another AS that AS21508 pays for full internet connectivity, allowing it to reach all global destinations and be reachable by them.

Downstreams of AS21508

46 downstreams
AS2134 AS11679 AS11739 AS13335 AS14583 AS15173 AS15297 AS17381 AS18773 AS19404 AS19923 AS22274 AS23209 AS27326 AS27341 AS30299 AS32540 AS36040 AS36244 AS36364 AS40641 AS46643 AS54219 AS54391 AS54883 AS62971 AS63468 AS393415 AS393591 AS393613 AS394058 AS395441 AS395527 AS395772 AS396083 AS396452 AS397039 AS397190 AS397483 AS398475 AS399099 AS399232 AS399607 AS399938 AS400114 AS402549

AS21508 provides internet connectivity to these downstream Autonomous Systems.

A downstream is a customer Autonomous System that pays another AS (its provider) for internet access. The provider AS carries the downstream's traffic and makes its network reachable.

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