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Autonomous System

AS4637 · Telstra Global

Overview

AS4637 is announced on the Internet: RIPE RIS route collectors currently see 666 IPv4 prefixes and 105 IPv6 prefixes originated by this network. Together, its IPv4 prefixes cover 1,245,696 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 75 upstream neighbours (transit providers or peers) and 536 downstream neighbours (customers or networks it carries). Its most visible upstreams are Hurricane Electric LLC (AS6939), Telstra Limited (AS1221), and Level 3 Parent, LLC (AS3356). AS4637 was assigned by APNIC, and its registration country is Hong Kong SAR China.

Source: RIPEstat (RIPE NCC), RIS route collectors. Read on October 18, 2026 at 7:31 AM UTC. This page is refreshed at most every 12 hours.

Go further

Trace a route to this networkOpen in the BGP viewerWHOIS of 195.152.0.1

The trace goes to 195.152.0.1, the first address of 195.152.0.0/15. 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 (666 prefixes)

PrefixAddresses
5.226.185.0/24256
13.142.0.0/1665,536
13.143.0.0/204,096
13.143.32.0/204,096
31.58.172.0/23512
31.58.174.0/23512
31.59.76.0/23512
37.153.152.0/24256
42.99.128.0/1732,768
42.99.144.0/212,048
42.99.152.0/212,048
42.99.168.0/212,048
42.99.176.0/212,048
42.99.216.0/23512
42.99.224.0/204,096
42.99.254.0/24256
58.145.195.0/24256
58.145.196.0/24256
58.145.198.0/24256
58.145.199.0/24256
58.145.200.0/24256
58.145.201.0/24256
58.145.202.0/24256
58.145.203.0/24256
58.145.225.0/24256
58.145.228.0/24256
58.145.234.0/24256
61.8.32.0/198,192
61.8.32.0/221,024
61.8.32.0/24256
61.8.36.0/221,024
61.8.37.0/24256
61.8.40.0/221,024
61.14.128.0/1816,384
61.14.139.0/24256
61.14.165.0/24256
61.14.166.0/24256
61.14.171.0/24256
61.14.186.0/24256
61.87.128.0/1816,384
63.133.192.0/212,048
63.133.200.0/212,048
63.160.0.0/24256
63.160.4.0/23512
63.160.32.0/212,048
63.160.224.0/198,192
63.161.16.0/204,096
63.161.224.0/198,192
63.164.160.0/198,192
63.172.128.0/198,192
63.175.32.0/198,192
64.32.152.0/212,048
64.50.136.0/212,048
64.145.128.0/198,192
64.145.160.0/198,192
64.145.192.0/198,192
64.145.224.0/198,192
65.160.160.0/198,192
65.161.96.0/198,192
65.163.96.0/198,192
65.166.32.0/198,192
65.166.192.0/198,192
65.167.0.0/198,192
65.167.160.0/198,192
65.170.224.0/198,192
65.171.32.0/198,192
65.171.192.0/198,192
65.173.160.0/198,192
65.174.32.0/198,192
66.17.72.0/212,048
66.200.240.0/204,096
74.3.0.0/198,192
74.3.32.0/198,192
74.3.64.0/198,192
74.3.96.0/198,192
81.172.116.0/24256
82.21.101.0/24256
82.21.134.0/23512
82.21.144.0/24256
82.29.26.0/24256
82.29.75.0/24256
88.223.47.0/24256
91.209.48.0/24256
95.134.136.0/24256
95.134.137.0/24256
95.134.138.0/24256
95.134.139.0/24256
95.170.21.0/24256
95.170.24.0/24256
95.170.31.0/24256
95.173.55.0/24256
101.167.176.0/23512
101.167.178.0/23512
101.167.180.0/23512
101.167.182.0/23512
101.167.184.0/23512
101.167.186.0/23512
101.167.188.0/221,024
101.167.192.0/212,048
101.167.192.0/221,024

Showing the first 100 of 666, in address order. Complete list on RIPEstat

IPv6 prefixes (105 prefixes)

Prefix
2001:cb0::/32
2001:cb0:208::/48
2001:cb0:20b::/48
2001:cb0:20d::/48
2001:cb0:20f::/48
2001:cb0:1208::/48
2001:cb0:120a::/48
2001:cb0:2203::/48
2001:cb0:3202::/48
2001:cb0:9204::/48
2001:cb0:9205::/48
2001:cc8::/32
2001:cc9::/32
2403:e800::/32
2403:e800:201::/48
2403:e800:203::/48
2403:e800:209::/48
2403:e800:211::/48
2403:e800:2fc::/48
2403:e800:2fe::/48
2403:e800:402::/48
2403:e800:404::/48
2403:e800:406::/48
2403:e800:407::/48
2403:e800:40a::/48
2403:e800:40b::/48
2403:e800:40c::/48
2403:e800:40d::/48
2403:e800:40e::/48
2403:e800:40f::/48
2403:e800:412::/48
2403:e800:413::/48
2403:e800:419::/48
2403:e800:41a::/48
2403:e800:41b::/48
2403:e800:41c::/48
2403:e800:421::/48
2403:e800:422::/48
2403:e800:423::/48
2403:e800:429::/48
2403:e800:42a::/48
2403:e800:42b::/48
2403:e800:501::/48
2403:e800:50d::/48
2403:e800:50e::/48
2403:e800:511::/48
2403:e800:513::/48
2403:e800:515::/48
2403:e800:51a::/48
2403:e800:51c::/48
2403:e800:51d::/48
2403:e800:601::/48
2403:e800:602::/48
2403:e800:603::/48
2403:e800:609::/48
2403:e800:60a::/48
2403:e800:60b::/48
2403:e800:724::/48
2403:e800:806::/48
2403:e800:80b::/48
2403:e800:81c::/48
2403:e800:901::/48
2403:e800:902::/48
2403:e800:903::/48
2403:e800:904::/48
2403:e800:c01::/48
2403:e800:c04::/48
2403:e800:d00::/48
2403:e800:d78::/48
2403:e800:d7c::/48
2403:e800:d7d::/48
2403:e800:e00::/48
2403:e800:e01::/48
2403:e800:e7c::/48
2403:e800:e7d::/48
2403:e800:e7e::/48
2403:e800:e80b::/48
2403:e800:fd00::/48
2403:e800:fd01::/48
2403:e800:fd02::/48
2403:e800:fd05::/48
2403:e800:fd07::/48
2403:e800:fd11::/48
2403:e800:fd12::/48
2403:e800:fd18::/48
2403:e800:fd20::/48
2403:e800:fd28::/48
2403:e800:fd2b::/48
2403:e800:fd34::/48
2403:e800:fd38::/48
2403:e800:fd3c::/48
2403:e800:fd3d::/48
2403:e800:fd3e::/48
2403:e800:fd49::/48
2403:e800:fd4d::/48
2403:e800:fd4e::/48
2403:e800:fd4f::/48
2403:e800:fd5c::/48
2403:e800:fd60::/48
2403:e800:fd70::/48

Showing the first 100 of 105, in address order. Complete list on RIPEstat

Neighbours

Upstreams (transit or peers) (75)

ASNetworkVisibility
AS6939Hurricane Electric LLC141,391
AS1221Telstra Limited110,439
AS3356Level 3 Parent, LLC25,682
AS1299Arelion Sweden AB20,716
AS9002RETN Limited18,116
AS3257GTT Communications Inc.15,309
AS6762TELECOM ITALIA SPARKLE S.p.A.11,941
AS6461Zayo Bandwidth11,338
AS13030Init7 (Switzerland) Ltd.10,649
AS55850Mercury NZ Limited9,698
AS35280F5 Networks SARL9,679
AS4657StarHub Ltd7,414
AS6453TATA COMMUNICATIONS (AMERICA) INC6,606
AS33891Core-Backbone GmbH6,070
AS47147Anexia Cloud Solutions GmbH5,830
AS3320Deutsche Telekom AG5,198
AS3935131173 Services AB5,138
AS5405Inter.link GmbH4,720
AS3491PCCW Global (HK) Ltd.4,469
AS24961WIIT AG4,301
AS8455atom86 BV4,042
AS5511Opentransit Orange S.A.3,845
AS31027GlobalConnect A/S3,392
AS577Bell Canada3,381
AS2497Internet Initiative Japan Inc.3,143
AS3303Swisscom (Schweiz) AG2,793
AS1257-2,649
AS6830LibertyGlobal Liberty Global Europe Holding B.V.2,462
AS60068Datacamp Limited2,376
AS37468Angola Cables1,793

The 30 most visible of 75.

Downstreams (customers) (536)

ASNetworkVisibility
AS1221Telstra Limited110,267
AS3356Level 3 Parent, LLC30,430
AS64049Reliance Jio Infocomm Pte Ltd Singapore21,409
AS18403FPT Telecom Company20,031
AS6762TELECOM ITALIA SPARKLE S.p.A.18,134
AS6939Hurricane Electric LLC15,319
AS20473The Constant Company, LLC11,402
AS6461Zayo Bandwidth9,638
AS38082True International Gateway Co., Ltd.9,302
AS45177Devoli8,552
AS135607Infinivan Incorporated8,495
AS136557-8,128
AS9498BHARTI Airtel Ltd.7,469
AS15830Equinix Equinix (EMEA) Acquisition Enterprises B.V.6,065
AS3257GTT Communications Inc.5,272
AS19551Incapsula Inc4,957
AS10010TOKAI Communications Corporation4,871
AS6453TATA COMMUNICATIONS (AMERICA) INC4,545
AS8966EMIRATES TELECOMMUNICATIONS GROUP COMPANY (ETISALAT GROUP) PJSC4,545
AS12956TELEFONICA GLOBAL SOLUTIONS SL3,917
AS9002RETN Limited3,536
AS8849Melbikomas UAB3,299
AS2519-3,154
AS55850Mercury NZ Limited3,045
AS132528-2,969
AS5511Opentransit Orange S.A.2,730
AS7922Comcast Cable Communications, LLC2,564
AS32787Akamai Technologies, Inc.2,492
AS58460-2,388
AS20940Akamai International B.V.2,265

The 30 most visible of 536.

188 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.