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Autonomous System

AS577 · Bell Canada

Overview

AS577 is announced on the Internet: RIPE RIS route collectors currently see 1,576 IPv4 prefixes and 68 IPv6 prefixes originated by this network. Together, its IPv4 prefixes cover 7,028,224 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 29 upstream neighbours (transit providers or peers) and 318 downstream neighbours (customers or networks it carries). Its most visible upstreams are Arelion Sweden AB (AS1299), Hurricane Electric LLC (AS6939), and Level 3 Parent, LLC (AS3356). AS577 was assigned by ARIN, and its registration country is Canada.

Source: RIPEstat (RIPE NCC), RIS route collectors. Read on October 18, 2026 at 2:47 AM UTC. This page is refreshed at most every 12 hours.

Go further

Trace a route to this networkOpen in the BGP viewerWHOIS of 50.100.0.1

The trace goes to 50.100.0.1, the first address of 50.100.0.0/16. 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 (1,576 prefixes)

PrefixAddresses
24.142.116.0/24256
44.31.12.0/23512
44.31.14.0/24256
47.54.2.0/24256
47.54.3.0/24256
47.54.20.0/24256
47.54.21.0/24256
47.54.22.0/24256
47.54.23.0/24256
47.54.72.0/24256
47.54.73.0/24256
47.54.74.0/24256
47.54.75.0/24256
47.54.88.0/24256
47.54.89.0/24256
47.54.90.0/24256
47.54.91.0/24256
47.54.92.0/24256
47.54.93.0/24256
47.54.94.0/24256
47.54.95.0/24256
47.54.96.0/24256
47.54.97.0/24256
47.54.98.0/24256
47.54.99.0/24256
47.54.100.0/24256
47.54.101.0/24256
47.54.102.0/24256
47.54.103.0/24256
47.54.104.0/24256
47.54.105.0/24256
47.54.106.0/24256
47.54.107.0/24256
47.54.108.0/24256
47.54.109.0/24256
47.54.110.0/24256
47.54.111.0/24256
47.54.124.0/24256
47.54.125.0/24256
47.54.126.0/24256
47.54.127.0/24256
47.54.128.0/24256
47.54.129.0/24256
47.54.130.0/24256
47.54.131.0/24256
47.54.140.0/24256
47.54.141.0/24256
47.54.142.0/24256
47.54.143.0/24256
47.54.148.0/24256
47.54.149.0/24256
47.54.150.0/24256
47.54.151.0/24256
47.54.152.0/24256
47.54.153.0/24256
47.54.154.0/24256
47.54.155.0/24256
47.54.156.0/24256
47.54.157.0/24256
47.54.158.0/24256
47.54.159.0/24256
47.54.176.0/24256
47.54.178.0/24256
47.54.179.0/24256
47.54.183.0/24256
47.55.36.0/24256
47.55.37.0/24256
47.55.38.0/24256
47.55.39.0/24256
47.55.64.0/24256
47.55.65.0/24256
47.55.66.0/24256
47.55.67.0/24256
47.55.68.0/24256
47.55.69.0/24256
47.55.70.0/24256
47.55.71.0/24256
47.55.72.0/24256
47.55.73.0/24256
47.55.74.0/24256
47.55.75.0/24256
47.55.148.0/24256
47.55.149.0/24256
47.55.150.0/24256
47.55.151.0/24256
47.55.160.0/24256
47.55.161.0/24256
47.55.162.0/24256
47.55.163.0/24256
47.55.164.0/24256
47.55.166.0/24256
47.55.167.0/24256
47.55.169.0/24256
47.55.170.0/24256
47.55.171.0/24256
47.55.172.0/24256
47.55.173.0/24256
47.55.174.0/24256
47.55.175.0/24256
47.55.229.0/24256

Showing the first 100 of 1,576, in address order. Complete list on RIPEstat

IPv6 prefixes (68 prefixes)

Prefix
2001:4958::/32
2602:812:2001::/48
2602:812:2002::/48
2602:812:2004::/48
2605:b100::/41
2605:b100:80::/48
2605:b100:81::/48
2605:b100:8b::/48
2605:b100:93::/48
2605:b100:a2::/47
2605:b100:100::/41
2605:b100:200::/41
2605:b100:280::/48
2605:b100:281::/48
2605:b100:298::/45
2605:b100:300::/41
2605:b100:320::/48
2605:b100:321::/48
2605:b100:322::/48
2605:b100:323::/48
2605:b100:338::/46
2605:b100:400::/41
2605:b100:480::/48
2605:b100:481::/48
2605:b100:48b::/48
2605:b100:493::/48
2605:b100:4a2::/47
2605:b100:500::/41
2605:b100:600::/41
2605:b100:680::/48
2605:b100:68e::/47
2605:b100:700::/41
2605:b100:800::/41
2605:b100:880::/48
2605:b100:893::/48
2605:b100:900::/41
2605:b100:a00::/40
2605:b100:a00::/41
2605:b100:a80::/48
2605:b100:b00::/40
2605:b100:b00::/41
2605:b100:c00::/41
2605:b100:c80::/48
2605:b100:c81::/48
2605:b100:d00::/41
2605:b100:eff::/48
2605:b100:f01::/48
2605:b100:1000::/41
2605:b100:1080::/41
2605:b100:1100::/41
2605:b100:1180::/41
2605:b100:1400::/48
2605:b100:1600::/46
2605:b100:e000::/44
2605:b100:e010::/44
2605:b100:e020::/44
2605:b100:e030::/44
2605:b100:e040::/44
2605:b100:e050::/44
2605:b100:e060::/44
2605:b100:e070::/44
2605:b100:f2f0::/47
2605:b100:f3f0::/47
2605:b100:f4f0::/47
2605:b100:f5f0::/47
2605:b100:f750::/44
2620:45:2000::/48
2620:d9:6000::/48

Neighbours

Upstreams (transit or peers) (29)

ASNetworkVisibility
AS1299Arelion Sweden AB20,237
AS6939Hurricane Electric LLC12,295
AS3356Level 3 Parent, LLC10,873
AS174Cogent Communications, LLC10,466
AS6453TATA COMMUNICATIONS (AMERICA) INC6,138
AS3257GTT Communications Inc.5,682
AS2914NTT America, Inc.5,066
AS3491PCCW Global (HK) Ltd.1,974
AS3303Swisscom (Schweiz) AG1,195
AS6461Zayo Bandwidth1,104
AS6830LibertyGlobal Liberty Global Europe Holding B.V.950
AS60068Datacamp Limited679
AS33891Core-Backbone GmbH647
AS2497Internet Initiative Japan Inc.604
AS4637Telstra Global484
AS1273IDDQD-AS451
AS15296-268
AS286GTT Communications Inc.257
AS2516KDDI CORPORATION248
AS54182-246
AS6204INTERKVM HOST SRL87
AS8220COLT Technology Services Group Limited37
AS395127-13
AS701Verizon Business9
AS7311-8
AS6327Shaw Communications7
AS4540-2
AS11342-1
AS11814Distributel Communications Limited1

Downstreams (customers) (318)

ASNetworkVisibility
AS3356Level 3 Parent, LLC29,158
AS6939Hurricane Electric LLC20,272
AS1299Arelion Sweden AB14,479
AS6461Zayo Bandwidth13,727
AS3491PCCW Global (HK) Ltd.10,343
AS174Cogent Communications, LLC6,862
AS1273IDDQD-AS5,191
AS15830Equinix Equinix (EMEA) Acquisition Enterprises B.V.4,519
AS6453TATA COMMUNICATIONS (AMERICA) INC4,512
AS701Verizon Business3,589
AS4637Telstra Global3,380
AS7122Bell Canada3,284
AS2675-2,417
AS3257GTT Communications Inc.2,413
AS35911-2,390
AS6830LibertyGlobal Liberty Global Europe Holding B.V.2,249
AS1403-2,232
AS7922Comcast Cable Communications, LLC2,155
AS33891Core-Backbone GmbH1,709
AS2914NTT America, Inc.1,580
AS803-1,574
AS8220COLT Technology Services Group Limited1,470
AS855-1,376
AS11814Distributel Communications Limited1,327
AS15321-1,246
AS22573-1,235
AS3848-1,210
AS30336-1,072
AS13845-847
AS10929-811

The 30 most visible of 318.

4 more neighbours appear on both sides of this network depending on the path, so they are counted in neither list.

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.