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Autonomous System

AS12271 · Charter Communications Inc

Overview

AS12271 is announced on the Internet: RIPE RIS route collectors currently see 111 IPv4 prefixes and 8 IPv6 prefixes originated by this network. Together, its IPv4 prefixes cover 2,864,640 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 2 upstream neighbours (transit providers or peers) and 50 downstream neighbours (customers or networks it carries). Its most visible upstreams are Charter Communications Inc (AS7843) and TATA COMMUNICATIONS (AMERICA) INC (AS6453). AS12271 was assigned by ARIN, and its registration country is United States.

Source: RIPEstat (RIPE NCC), RIS route collectors. Read on October 16, 2026 at 11:44 PM UTC. This page is refreshed at most every 12 hours.

Go further

Trace a route to this networkOpen in the BGP viewerWHOIS of 74.72.0.1

The trace goes to 74.72.0.1, the first address of 74.72.0.0/15. 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 (111 prefixes)

PrefixAddresses
23.246.64.0/1816,384
24.29.96.0/198,192
24.29.128.0/198,192
24.30.224.0/204,096
24.39.104.0/212,048
24.39.112.0/204,096
24.39.128.0/198,192
24.90.0.0/1665,536
24.97.123.0/24256
24.97.124.0/221,024
24.97.184.0/23512
24.97.200.0/212,048
24.102.64.0/1816,384
24.103.0.0/1732,768
24.103.224.0/198,192
24.104.192.0/1816,384
24.105.128.0/198,192
24.136.96.0/198,192
24.161.0.0/1732,768
24.164.128.0/1816,384
24.168.0.0/1732,768
24.168.128.0/198,192
24.193.0.0/1665,536
24.213.160.0/198,192
47.230.0.0/1665,536
50.74.0.0/1665,536
50.75.192.0/1816,384
65.86.104.0/212,048
66.65.0.0/1732,768
66.65.128.0/1816,384
66.93.136.0/212,048
66.108.0.0/1665,536
66.110.97.0/24256
67.243.0.0/1665,536
67.244.0.0/198,192
67.244.64.0/1816,384
67.245.0.0/1665,536
67.247.0.0/1816,384
67.247.96.0/198,192
67.250.0.0/1665,536
67.251.128.0/198,192
67.251.192.0/1816,384
67.254.0.0/1665,536
68.165.184.0/212,048
68.172.208.0/204,096
68.172.224.0/198,192
68.173.0.0/1665,536
68.174.0.0/1665,536
68.175.0.0/1732,768
69.193.128.0/1816,384
69.193.192.0/198,192
69.193.224.0/198,192
69.200.64.0/198,192
69.200.224.0/198,192
69.200.240.0/212,048
69.201.128.0/1732,768
69.202.128.0/1732,768
69.203.0.0/1732,768
69.203.128.0/198,192
69.203.192.0/1816,384
69.204.224.0/198,192
69.206.0.0/1665,536
72.43.96.0/198,192
72.43.128.0/1816,384
72.225.64.0/1816,384
72.225.128.0/1732,768
72.226.0.0/1732,768
72.227.128.0/1732,768
72.229.0.0/1665,536
72.231.0.0/1732,768
74.0.136.0/212,048
74.64.0.0/1665,536
74.65.192.0/1816,384
74.66.0.0/1665,536
74.68.0.0/1665,536
74.71.0.0/1665,536
74.72.0.0/15131,072
76.58.52.0/23512
98.0.128.0/1732,768
98.7.0.0/1732,768
98.7.192.0/1816,384
98.12.0.0/1665,536
98.13.128.0/1732,768
98.14.0.0/15131,072
108.176.0.0/1816,384
108.176.128.0/1816,384
142.105.0.0/1732,768
142.255.0.0/1732,768
149.89.0.0/1665,536
150.221.96.0/198,192
150.224.177.0/24256
158.222.128.0/1732,768
168.148.128.0/198,192
172.254.0.0/1665,536
184.74.128.0/1732,768
184.75.0.0/1732,768
184.152.0.0/1665,536
184.153.0.0/1732,768
192.61.128.0/198,192
192.131.40.0/221,024

Showing the first 100 of 111, in address order. Complete list on RIPEstat

IPv6 prefixes (8 prefixes)

Prefix
2600:6000::/32
2600:6c7f:9360::/44
2602:107:6300::/40
2602:107:6310::/44
2602:107:e400::/40
2603:7000::/28
2603:90be::/32
2604:2000::/32

Neighbours

Upstreams (transit or peers) (2)

ASNetworkVisibility
AS7843Charter Communications Inc10,200
AS6453TATA COMMUNICATIONS (AMERICA) INC80

Downstreams (customers) (50)

ASNetworkVisibility
AS54113Fastly, Inc.342
AS14478Recurse Center336
AS19796Shubert Organization, Inc.283
AS46765Liberum Capital Inc.273
AS395095Orange Regional Medical Center273
AS402355Visentry273
AS27185Danbury Hospital - ITG272
AS32730LG CNS America Inc.272
AS402494Bartlett272
AS16770Astoria Generating Company, L.P.271
AS55123-271
AS22303-270
AS393753-270
AS401827-270
AS25816-269
AS14465-267
AS19794-266
AS23325-266
AS54226-266
AS18564-264
AS395060-259
AS54201-250
AS393562-248
AS6292-186
AS397595-184
AS25669-157
AS22252-155
AS40170-155
AS62566-151
AS393569-151

The 30 most visible of 50.

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.