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Autonomous System

AS7473 · Singapore Telecommunications Ltd

Overview

AS7473 is announced on the Internet: RIPE RIS route collectors currently see 46 IPv4 prefixes and 9 IPv6 prefixes originated by this network. Together, its IPv4 prefixes cover 64,512 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 43 upstream neighbours (transit providers or peers) and 239 downstream neighbours (customers or networks it carries). Its most visible upstreams are Zayo Bandwidth (AS6461), SingTel Optus Pty Ltd (AS7474), and Hurricane Electric LLC (AS6939). AS7473 was assigned by APNIC, and its registration country is Singapore.

Source: RIPEstat (RIPE NCC), RIS route collectors. Read on October 16, 2026 at 8:54 PM UTC. This page is refreshed at most every 12 hours.

Go further

Trace a route to this networkOpen in the BGP viewerWHOIS of 203.208.128.1

The trace goes to 203.208.128.1, the first address of 203.208.128.0/17. 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 (46 prefixes)

PrefixAddresses
101.234.31.0/24256
101.234.32.0/24256
101.234.34.0/24256
101.234.40.0/24256
117.18.32.0/198,192
117.18.47.0/24256
117.18.48.0/24256
120.72.64.0/24256
120.72.65.0/24256
193.103.148.0/24256
194.180.112.0/23512
202.83.218.0/24256
202.160.224.0/198,192
202.165.128.0/198,192
202.165.148.0/24256
202.189.128.0/221,024
202.189.128.0/24256
202.189.129.0/24256
202.189.130.0/23512
202.189.132.0/221,024
202.189.136.0/212,048
203.127.108.0/24256
203.208.128.0/1732,768
203.208.128.0/198,192
203.208.141.0/24256
203.208.143.0/24256
203.208.147.0/24256
203.208.150.0/24256
203.208.155.0/24256
203.208.158.0/24256
203.208.160.0/198,192
203.208.164.0/24256
203.208.165.0/24256
203.208.173.0/24256
203.208.175.0/24256
203.208.179.0/24256
203.208.184.0/24256
203.208.186.0/24256
203.208.189.0/24256
203.208.191.0/24256
203.208.192.0/198,192
203.208.197.0/24256
203.208.199.0/24256
203.208.204.0/24256
203.208.207.0/24256
220.232.57.0/24256

IPv6 prefixes (9 prefixes)

Prefix
2001:c10::/32
2001:c10:ff11::/48
2001:c10:ff14::/48
2001:c10:ff1b::/48
2001:c10:ff1c::/48
2001:c10:ff24::/48
2404:1000:1::/48
2404:1000:2::/48
2a05:a884:de20::/48

Neighbours

Upstreams (transit or peers) (43)

ASNetworkVisibility
AS6461Zayo Bandwidth76,191
AS7474SingTel Optus Pty Ltd73,699
AS6939Hurricane Electric LLC31,368
AS1299Arelion Sweden AB26,570
AS6453TATA COMMUNICATIONS (AMERICA) INC6,953
AS9583Sify Limited6,936
AS56308TELEKOMUNIKASI INDONESIA INTERNATIONAL, PTE.LTD6,869
AS9002RETN Limited4,321
AS6762TELECOM ITALIA SPARKLE S.p.A.3,473
AS33891Core-Backbone GmbH2,133
AS3935131173 Services AB2,055
AS3491PCCW Global (HK) Ltd.1,860
AS1103SURF B.V.1,396
AS9304HGC Global Communications Limited1,055
AS2914NTT America, Inc.1,024
AS3320Deutsche Telekom AG771
AS8220COLT Technology Services Group Limited643
AS15802Emirates Integrated Telecommunications Company PJSC639
AS58453China Mobile International Limited637
AS3356Level 3 Parent, LLC509
AS2497Internet Initiative Japan Inc.501
AS12389PJSC Rostelecom463
AS17676SoftBank Corp.382
AS2516KDDI CORPORATION362
AS4637Telstra Global326
AS8359-295
AS8966EMIRATES TELECOMMUNICATIONS GROUP COMPANY (ETISALAT GROUP) PJSC263
AS17686-159
AS4657StarHub Ltd158
AS4229Zenlayer Inc109

The 30 most visible of 43.

Downstreams (customers) (239)

ASNetworkVisibility
AS7474SingTel Optus Pty Ltd38,772
AS6939Hurricane Electric LLC27,572
AS1299Arelion Sweden AB20,443
AS3758SingNet18,935
AS9498BHARTI Airtel Ltd.14,154
AS6461Zayo Bandwidth9,564
AS9304HGC Global Communications Limited9,084
AS6453TATA COMMUNICATIONS (AMERICA) INC7,969
AS38082True International Gateway Co., Ltd.6,766
AS17557Pakistan Telecommunication Company Limited4,813
AS9583Sify Limited4,743
AS45558MYANMA POSTS AND TELECOMMUNICATIONS4,087
AS9269-3,777
AS136106PT. Mega Akses Persada3,414
AS20473The Constant Company, LLC3,168
AS7632-3,071
AS6774Belgacom International Carrier Services SA2,941
AS45430-2,837
AS9381HKBN Enterprise Solutions HK Limited2,794
AS3491PCCW Global (HK) Ltd.2,734
AS31898Oracle Corporation2,251
AS2914NTT America, Inc.2,163
AS3320Deutsche Telekom AG2,132
AS45629JasTel Network International Gateway2,044
AS56308-2,028
AS18186Nebula Global LLC1,976
AS8966EMIRATES TELECOMMUNICATIONS GROUP COMPANY (ETISALAT GROUP) PJSC1,861
AS4775Globe Telecoms1,748
AS9002RETN Limited1,648
AS137366-1,647

The 30 most visible of 239.

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.