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Autonomous System

AS40264 · Charter Communications LLC

Overview

AS40264 is announced on the Internet: RIPE RIS route collectors currently see 18 IPv4 prefixes and 4 IPv6 prefixes originated by this network. Together, its IPv4 prefixes cover 15,872 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 2 upstream neighbours (transit providers or peers) and 143 downstream neighbours (customers or networks it carries). Its most visible upstreams are Charter Communications LLC (AS20115) and Charter Communications Inc (AS10796). AS40264 was assigned by ARIN, and its registration country is United States.

Source: RIPEstat (RIPE NCC), RIS route collectors. Read on October 16, 2026 at 8:53 PM UTC. This page is refreshed at most every 12 hours.

Go further

The trace goes to 76.58.8.1, the first address of 76.58.8.0/21. 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 (18 prefixes)

PrefixAddresses
47.45.16.0/24256
47.45.46.0/24256
47.45.59.0/24256
76.58.8.0/212,048
76.58.45.0/24256
76.58.48.0/221,024
82.27.4.0/221,024
82.27.12.0/221,024
82.29.16.0/221,024
82.29.32.0/221,024
97.75.228.0/24256
138.207.2.0/23512
144.168.16.0/212,048
192.62.232.0/212,048
192.104.31.0/24256
199.15.240.0/212,048
204.176.194.0/24256
208.103.155.0/24256

IPv6 prefixes (4 prefixes)

Prefix
2602:107:4100::/40
2602:107:e100::/40
2602:80c:1004::/48
2602:80c:1008::/48

Neighbours

Upstreams (transit or peers) (2)

ASNetworkVisibility
AS20115Charter Communications LLC20,281
AS10796Charter Communications Inc13,288

Downstreams (customers) (143)

ASNetworkVisibility
AS32625OFFSITE, LLC933
AS22809American Family Insurance655
AS25958Marshfield Clinic Inc.548
AS33596Brunswick Corporation541
AS14440Citon Computer Corp527
AS394621Stack41, llc.508
AS397171Green Bay Packaging, INC507
AS55208Navitus Health Solutions, LLC502
AS36724Hanson Communications, Inc.487
AS402035Sergeant Laboratories, Inc479
AS395526-475
AS400013-454
AS22223-450
AS22955-419
AS13376-414
AS40238-401
AS11964-391
AS12047-390
AS10634-380
AS27360-373
AS13731-352
AS396152-342
AS22344-296
AS6341-294
AS13567-285
AS33753-285
AS21801-283
AS1437-282
AS11595-282
AS33468-282

The 30 most visible of 143.

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.