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Autonomous System

AS33287 · Comcast Cable Communications, LLC

Overview

AS33287 is announced on the Internet: RIPE RIS route collectors currently see 45 IPv4 prefixes and 305 IPv6 prefixes originated by this network. Together, its IPv4 prefixes cover 13,824 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 2 upstream neighbours (transit providers or peers) and 132 downstream neighbours (customers or networks it carries). Its most visible upstreams are Comcast Cable Communications, LLC (AS7922) and Level 3 Parent, LLC (AS3356). AS33287 was assigned by ARIN, and its registration country is United States.

Source: RIPEstat (RIPE NCC), RIS route collectors. Read on October 16, 2026 at 8:58 PM UTC. This page is refreshed at most every 12 hours.

Go further

Trace a route to this networkOpen in the BGP viewerWHOIS of 24.75.216.1

The trace goes to 24.75.216.1, the first address of 24.75.216.0/22. An address picked inside a prefix may not answer (nothing listens there, or the network filters probes): the trace then shows the path up to the last network that replies.

Announced prefixes

IPv4 prefixes (45 prefixes)

PrefixAddresses
24.75.216.0/221,024
24.104.156.0/24256
31.132.54.0/23512
45.58.210.0/23512
50.148.139.0/24256
50.148.165.0/24256
50.200.97.0/24256
50.201.99.0/24256
50.202.31.0/24256
50.202.142.0/24256
50.202.176.0/24256
50.203.190.0/24256
50.206.77.0/24256
50.206.85.0/24256
50.206.163.0/24256
50.207.65.0/24256
50.216.135.0/24256
50.216.138.0/24256
50.218.90.0/24256
50.222.119.0/24256
50.225.8.0/24256
50.225.65.0/24256
50.225.139.0/24256
50.227.176.0/24256
50.229.207.0/24256
50.232.31.0/24256
50.232.103.0/24256
64.52.28.0/221,024
69.91.182.0/23512
107.0.50.0/24256
107.1.33.0/24256
107.1.53.0/24256
107.1.86.0/24256
107.1.136.0/24256
158.62.212.0/24256
158.62.214.0/24256
158.62.215.0/24256
167.254.205.0/24256
170.62.252.0/24256
170.62.255.0/24256
192.64.165.0/24256
192.133.105.0/24256
192.135.0.0/24256
198.184.150.0/24256
209.23.225.0/24256

IPv6 prefixes (305 prefixes)

Prefix
2001:559:30::/48
2001:559:4b::/48
2001:559:81::/48
2001:559:a8::/48
2001:559:a9::/48
2001:559:b6::/48
2001:559:b7::/48
2001:559:c2::/48
2001:559:d6::/48
2001:559:108::/48
2001:559:109::/48
2001:559:111::/48
2001:559:117::/48
2001:559:121::/48
2001:559:139::/48
2001:559:149::/48
2001:559:15e::/48
2001:559:15f::/48
2001:559:165::/48
2001:559:193::/48
2001:559:1aa::/48
2001:559:1b6::/48
2001:559:1bc::/48
2001:559:1bf::/48
2001:559:1c3::/48
2001:559:1c4::/48
2001:559:1c7::/48
2001:559:1d3::/48
2001:559:1ea::/48
2001:559:1ee::/48
2001:559:257::/48
2001:559:25e::/48
2001:559:272::/48
2001:559:28c::/48
2001:559:2c3::/48
2001:559:2c5::/48
2001:559:2c7::/48
2001:559:2c8::/48
2001:559:2e2::/48
2001:559:2ea::/48
2001:559:2f1::/48
2001:559:2f4::/48
2001:559:2f5::/48
2001:559:30f::/48
2001:559:312::/48
2001:559:35a::/48
2001:559:35d::/48
2001:559:369::/48
2001:559:387::/48
2001:559:38a::/48
2001:559:3a4::/48
2001:559:3d1::/48
2001:559:3d7::/48
2001:559:3ef::/48
2001:559:3f8::/48
2001:559:40c::/48
2001:559:40d::/48
2001:559:40f::/48
2001:559:412::/48
2001:559:413::/48
2001:559:432::/48
2001:559:437::/48
2001:559:439::/48
2001:559:460::/48
2001:559:481::/48
2001:559:4ab::/48
2001:559:4bc::/48
2001:559:4bd::/48
2001:559:4cb::/48
2001:559:4f2::/48
2001:559:4f9::/48
2001:559:50a::/48
2001:559:538::/48
2001:559:556::/48
2001:559:569::/48
2001:559:571::/48
2001:559:582::/48
2001:559:58f::/48
2001:559:593::/48
2001:559:595::/48
2001:559:596::/48
2001:559:597::/48
2001:559:59a::/48
2001:559:59d::/48
2001:559:5a5::/48
2001:559:5b2::/48
2001:559:5d1::/48
2001:559:5dd::/48
2001:559:5e0::/48
2001:559:5ed::/48
2001:559:5ee::/48
2001:559:5fb::/48
2001:559:5fe::/48
2001:559:700::/48
2001:559:706::/48
2001:559:70a::/48
2001:559:70b::/48
2001:559:71d::/48
2001:559:71e::/48
2001:559:726::/48

Showing the first 100 of 305, in address order. Complete list on RIPEstat

Neighbours

Upstreams (transit or peers) (2)

ASNetworkVisibility
AS7922Comcast Cable Communications, LLC12,994
AS3356Level 3 Parent, LLC4,251

Downstreams (customers) (132)

ASNetworkVisibility
AS34University of Delaware583
AS36253Delaware County Intermediate Unit545
AS46807-502
AS33261Power Home Remodeling LLC336
AS15243Widener University267
AS27016United States Nuclear Regulatory Commission265
AS36040Google LLC257
AS17035NBCUniversal254
AS30330Automotive Rentals, Inc.254
AS394916Philadelphia International Airport254
AS36679-253
AS64287-253
AS400843-253
AS32949-252
AS395503-248
AS19826-246
AS26764-245
AS40471-243
AS19576-240
AS62958ADT LLC238
AS16958-231
AS26881-227
AS40177-224
AS397380-224
AS22641-222
AS53291-222
AS11826-221
AS21897-221
AS36350-221
AS393228-221

The 30 most visible of 132.

Visibility is RIPEstat's count of how often the route collectors observed the link. It compares neighbours with each other; it is not a traffic volume.

How to read this page

An Autonomous System (AS) is a network run under one routing policy: an internet provider, a cloud, a content network, a university. Each one has a number, its ASN, assigned by a regional registry (ARIN, RIPE NCC, APNIC, LACNIC, AFRINIC), and uses BGP, the protocol networks use to tell each other where addresses are, to announce the blocks of addresses it delivers to.

A prefix such as 203.0.113.0/24 is a block of addresses: the number after the slash says how many bits are fixed, so a /24 holds 256 IPv4 addresses and a /16 holds 65,536. Networks often announce a large block and smaller pieces of it at the same time, which is why the address total counts each address once.

Neighbours come from the paths themselves. A network that appears just before this one in a path, on the collector's side, is an upstream: a transit provider or a peer. One that appears just after it is a downstream, usually a customer. Peering at an internet exchange also shows up as an upstream, so the upstream list is not a list of paid transit.

The data comes from RIPEstat, run by the RIPE NCC, which gathers the routing tables of hundreds of networks through its RIS route collectors. This page reads it when it is visited and keeps it for 12 hours at most; the BGP viewer reads it live.

Frequently asked questions

How do I find the ASN of an IP address?
Type the address in the BGP viewer: it shows the prefix that covers it, the AS that originates that prefix and the paths seen towards it. A traceroute also names the network of each hop, so you can see every AS a connection crosses.
Why does one company have several ASNs?
Large operators split their network by region, by activity or by history: a cloud may use one number for its backbone and another for a region, and every acquisition brings its own numbers. Each number has its own page, with its own prefixes and neighbours.
Why do prefix counts differ from one site to another?
Each source sees the routing table from different collectors, at a different time, and counts differently: some include prefixes withdrawn in recent weeks, some merge a block and its pieces. This page counts the prefixes RIPE RIS collectors see originated by the network at the end of the latest two-week window, and counts each IPv4 address once.
Is this the list of IP ranges of a cloud provider?
It is what its networks announce, which is what the Internet routes to them. Many providers also publish an official list of ranges per service and region; that list is the reference for firewall rules, because a range can be announced before it is used, or announced by another of their AS numbers.