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Autonomous System

AS4766 · Korea Telecom

Overview

AS4766 is announced on the Internet: RIPE RIS route collectors currently see 2,375 IPv4 prefixes and 52 IPv6 prefixes originated by this network. Together, its IPv4 prefixes cover 47,221,888 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 55 upstream neighbours (transit providers or peers) and 572 downstream neighbours (customers or networks it carries). Its most visible upstreams are Hurricane Electric LLC (AS6939), Arelion Sweden AB (AS1299), and Cogent Communications, LLC (AS174). AS4766 was assigned by APNIC, and its registration country is South Korea.

Source: RIPEstat (RIPE NCC), RIS route collectors. Read on October 16, 2026 at 11:53 PM UTC. This page is refreshed at most every 12 hours.

Go further

Trace a route to this networkOpen in the BGP viewerWHOIS of 59.0.0.1

The trace goes to 59.0.0.1, the first address of 59.0.0.0/11. 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 (2,375 prefixes)

PrefixAddresses
1.96.0.0/14262,144
1.100.0.0/14262,144
1.104.0.0/14262,144
1.108.0.0/14262,144
1.231.13.0/24256
1.231.122.0/24256
1.231.136.0/24256
1.231.182.0/24256
1.231.183.0/24256
1.231.184.0/24256
1.231.185.0/24256
1.231.194.0/24256
1.231.195.0/24256
1.231.196.0/24256
1.231.197.0/24256
1.231.198.0/24256
9.233.32.0/204,096
13.143.88.0/221,024
13.143.92.0/221,024
13.143.96.0/221,024
14.32.0.0/13524,288
14.40.0.0/13524,288
14.42.223.0/24256
14.46.54.0/24256
14.46.246.0/23512
14.46.248.0/212,048
14.48.0.0/13524,288
14.49.8.0/212,048
14.49.15.0/24256
14.49.16.0/212,048
14.49.16.0/24256
14.49.48.0/212,048
14.55.178.0/24256
14.56.0.0/13524,288
14.63.128.0/24256
14.63.132.0/221,024
14.63.136.0/221,024
14.63.143.0/24256
14.63.144.0/204,096
14.63.235.0/24256
14.63.236.0/221,024
14.63.248.0/23512
14.64.0.0/121,048,576
14.80.0.0/121,048,576
14.128.128.0/23512
14.128.130.0/23512
14.128.132.0/23512
14.128.134.0/23512
14.128.136.0/221,024
14.128.140.0/221,024
14.128.144.0/221,024
14.128.148.0/221,024
14.128.152.0/221,024
14.128.156.0/221,024
14.128.160.0/221,024
14.128.160.0/24256
14.128.161.0/24256
14.128.162.0/24256
14.128.163.0/24256
14.128.164.0/221,024
14.128.168.0/221,024
14.128.172.0/221,024
16.216.128.0/23512
23.26.110.0/24256
23.26.120.0/24256
23.26.138.0/24256
23.26.147.0/24256
23.26.158.0/23512
23.90.6.0/23512
23.133.132.0/24256
23.133.148.0/24256
23.133.244.0/24256
23.134.4.0/24256
23.134.220.0/24256
27.96.136.0/212,048
27.232.0.0/14262,144
27.236.0.0/14262,144
27.255.64.0/24256
31.56.172.0/24256
31.56.173.0/24256
31.56.242.0/24256
31.56.243.0/24256
31.56.244.0/24256
31.56.245.0/24256
31.77.176.0/23512
39.4.0.0/14262,144
39.16.0.0/13524,288
39.24.0.0/13524,288
43.228.160.0/23512
43.228.162.0/23512
43.228.162.0/24256
43.230.76.0/23512
43.230.78.0/24256
43.230.79.0/24256
43.246.152.0/24256
43.246.153.0/24256
43.246.154.0/24256
43.246.155.0/24256
45.64.172.0/221,024
45.92.104.0/221,024

Showing the first 100 of 2,375, in address order. Complete list on RIPEstat

IPv6 prefixes (52 prefixes)

Prefix
2400:0:611::/48
2400:0:810::/44
2400:0:820::/44
2400:0:830::/44
2400:0:840::/44
2400:0:850::/44
2400:0:860::/44
2400:0:870::/44
2400:12::/48
2400:32::/48
2400:e1::/32
2400:e2::/32
2400:f1::/32
2400:f2::/32
2400:f3::/32
2400:f4::/32
2400:f5::/32
2400:f6::/32
2400:f7::/32
2400:100::/32
2400:101::/32
2400:102::/32
2400:103::/32
2400:103:c009::/48
2400:104::/30
2400:108::/32
2400:109::/32
2400:10b::/32
2400:110::/32
2400:111::/32
2400:112::/32
2400:120::/31
2400:122::/31
2400:124::/31
2400:126::/32
2400:130::/30
2400:130:c009::/48
2400:134::/32
2400:140::/30
2400:140:c009::/48
2400:144::/30
2400:144:c009::/48
2400:148::/32
2400:150::/30
2400:150:c009::/48
2400:154::/31
2400:156::/32
2400:156:c009::/48
2400:160::/30
2400:160:c009::/48
2400:164::/31
2400:221:3002::/48

Neighbours

Upstreams (transit or peers) (55)

ASNetworkVisibility
AS6939Hurricane Electric LLC94,736
AS1299Arelion Sweden AB12,786
AS174Cogent Communications, LLC8,234
AS3356Level 3 Parent, LLC7,848
AS6762TELECOM ITALIA SPARKLE S.p.A.4,035
AS9002RETN Limited3,391
AS3491PCCW Global (HK) Ltd.2,163
AS3320Deutsche Telekom AG2,070
AS2914NTT America, Inc.1,964
AS701Verizon Business1,801
AS3257GTT Communications Inc.1,539
AS3935131173 Services AB1,265
AS20485Joint Stock Company TransTeleCom1,157
AS7473Singapore Telecommunications Ltd1,102
AS13786Seabras 1 USA, LLC1,072
AS2497Internet Initiative Japan Inc.1,034
AS6461Zayo Bandwidth977
AS8455atom86 BV932
AS9304HGC Global Communications Limited776
AS50304Blix Solutions AS716
AS60068Datacamp Limited604
AS4637Telstra Global576
AS6830LibertyGlobal Liberty Global Europe Holding B.V.567
AS9583Sify Limited550
AS33891Core-Backbone GmbH548
AS37282Main one Cable Company Nigeria Limited548
AS37100SEACOM Limited520
AS17676SoftBank Corp.514
AS12389PJSC Rostelecom470
AS1273IDDQD-AS325

The 30 most visible of 55.

Downstreams (customers) (572)

ASNetworkVisibility
AS9957KINX7,269
AS1237KISTI3,490
AS7562HCN Dongjak3,023
AS17841NATIONAL INFORMATION RESOURCES SERVICE2,881
AS64050BGP Network Limited1,954
AS20940Akamai International B.V.1,373
AS7679QTnet,Inc.1,215
AS18305POSCO DX1,032
AS6619SamsungSDS Inc.989
AS9848SEJONG NETWORKS853
AS10167-848
AS38676-820
AS9524-804
AS23600-755
AS9858-666
AS4651National Telecom Public Company Limited662
AS9842-644
AS139341ACE642
AS9647-639
AS9843-624
AS45382-612
AS55592-609
AS9638-600
AS38701-585
AS9270National Infomation Society Agency577
AS38420-571
AS9708-562
AS9850-554
AS9455-553
AS10056-551

The 30 most visible of 572.

10 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.