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ASN Lookup Tool
AS33657 CMCS

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ASN Extended Info API & BGP Active Prefixes API
ASN Details
ASN
AS33657
Organisation
Comcast Cable Communications, LLC
Name
CMCS
Total IPv4 Addresses
3000887
Total IPv4 Prefixes
219
Total IPv6 Prefixes
362
Total IPv4 Bogon Prefixes
0
Total IPv6 Bogon Prefixes
0
IPv4 Space Rank
#160 out of 76,397
Registry
Arin
Registered Country
US flag US
Registered Country Name
United States of America (the)
Registered Date
2005-02-16
Registration Last Change
2021-01-25
Receiving From

The list of active Autonomous Systems (ASs) which send traffic to that ASN.

ASN
Organisation
AS7018
US flagAT&T Services, Inc.
AS3356
US flagLevel 3 Parent, LLC
AS7922
US flagComcast Cable Communications, LLC
AS3303
CH flagSwisscom (Schweiz) AG
AS6461
US flagZayo Bandwidth
Showing 5 of 13
Transit To

The list of active Autonomous Systems (ASs) which receive traffic from that ASN.

 

ASN
Organisation
AS834
US flagIPXO LLC
AS29
US flagYale University
AS77
US flagJohns Hopkins University Applied Physics Laborat..
AS2384
US flagArchitect of the Capitol
AS33170
US flagMorgan State University
Showing 5 of 125
IPv4 Active Prefixes

This provides the list of IPv4 address space routes/prefixes currently announced on Border Gateway Protocol (BGP).

Prefix23.24.96.0/19
Range From23.24.96.0
Range To23.24.127.255
Prefix23.25.188.0/22
Range From23.25.188.0
Range To23.25.191.255
Prefix23.30.0.0/19
Range From23.30.0.0
Range To23.30.31.255
Prefix23.31.192.0/19
Range From23.31.192.0
Range To23.31.223.255
Prefix24.124.152.0/23
Range From24.124.152.0
Range To24.124.153.255
Showing 5 of 219
IPv6 Active Prefixes
Prefix2001:558:2f0::/44
Range From2001:558:2f0::
Range To2001:558:2ff:ffff:ffff:ffff:ffff:ffff
Prefix2001:558:340::/44
Range From2001:558:340::
Range To2001:558:34f:ffff:ffff:ffff:ffff:ffff
Prefix2001:558:fe06::/47
Range From2001:558:fe06::
Range To2001:558:fe07:ffff:ffff:ffff:ffff:ffff
Prefix2001:559:b::/48
Range From2001:559:b::
Range To2001:559:b:ffff:ffff:ffff:ffff:ffff
Prefix2001:559:48::/48
Range From2001:559:48::
Range To2001:559:48:ffff:ffff:ffff:ffff:ffff
Showing 5 of 362
Autonomous System (AS) is a network (or collection of networks) that are all managed and supervised by a single entity or organisation. This tool provides a comprehensive ownership and connectivity report for any given AS number.