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Autonomous System

AS20940 · Akamai International B.V.

Overview

AS20940 is announced on the Internet: RIPE RIS route collectors currently see 3,946 IPv4 prefixes and 764 IPv6 prefixes originated by this network. Together, its IPv4 prefixes cover 13,880,000 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 280 upstream neighbours (transit providers or peers) and 14 downstream neighbours (customers or networks it carries). Its most visible upstreams are Telstra Limited (AS1221), UNINET (AS8151), and Arelion Sweden AB (AS1299). AS20940 was assigned by RIPE NCC, and its registration country is Netherlands.

Source: RIPEstat (RIPE NCC), RIS route collectors. Read on October 16, 2026 at 9:48 PM UTC. This page is refreshed at most every 12 hours.

Go further

Trace a route to this networkOpen in the BGP viewerWHOIS of 104.64.0.1

The trace goes to 104.64.0.1, the first address of 104.64.0.0/10. 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 (3,946 prefixes)

PrefixAddresses
2.16.0.0/13524,288
2.16.0.0/24256
2.16.1.0/24256
2.16.2.0/24256
2.16.4.0/23512
2.16.6.0/24256
2.16.7.0/24256
2.16.8.0/24256
2.16.10.0/24256
2.16.11.0/24256
2.16.14.0/24256
2.16.15.0/24256
2.16.16.0/24256
2.16.22.0/24256
2.16.23.0/24256
2.16.24.0/23512
2.16.27.0/24256
2.16.28.0/24256
2.16.29.0/24256
2.16.34.0/24256
2.16.41.0/24256
2.16.45.0/24256
2.16.48.0/24256
2.16.50.0/23512
2.16.52.0/24256
2.16.54.0/24256
2.16.55.0/24256
2.16.56.0/24256
2.16.57.0/24256
2.16.60.0/23512
2.16.62.0/24256
2.16.63.0/24256
2.16.64.0/24256
2.16.65.0/24256
2.16.66.0/23512
2.16.72.0/23512
2.16.74.0/23512
2.16.76.0/24256
2.16.77.0/24256
2.16.78.0/24256
2.16.79.0/24256
2.16.80.0/23512
2.16.84.0/23512
2.16.88.0/24256
2.16.89.0/24256
2.16.92.0/24256
2.16.93.0/24256
2.16.96.0/221,024
2.16.100.0/23512
2.16.103.0/24256
2.16.106.0/24256
2.16.107.0/24256
2.16.108.0/24256
2.16.109.0/24256
2.16.110.0/24256
2.16.111.0/24256
2.16.114.0/23512
2.16.116.0/24256
2.16.118.0/24256
2.16.119.0/24256
2.16.120.0/24256
2.16.121.0/24256
2.16.128.0/24256
2.16.129.0/24256
2.16.131.0/24256
2.16.132.0/23512
2.16.135.0/24256
2.16.136.0/24256
2.16.137.0/24256
2.16.138.0/23512
2.16.140.0/24256
2.16.141.0/24256
2.16.142.0/24256
2.16.143.0/24256
2.16.144.0/24256
2.16.145.0/24256
2.16.146.0/24256
2.16.147.0/24256
2.16.148.0/221,024
2.16.152.0/24256
2.16.153.0/24256
2.16.154.0/24256
2.16.155.0/24256
2.16.156.0/23512
2.16.158.0/24256
2.16.159.0/24256
2.16.160.0/23512
2.16.162.0/24256
2.16.163.0/24256
2.16.164.0/24256
2.16.165.0/24256
2.16.166.0/24256
2.16.167.0/24256
2.16.168.0/24256
2.16.169.0/24256
2.16.170.0/24256
2.16.171.0/24256
2.16.172.0/24256
2.16.173.0/24256
2.16.180.0/24256

Showing the first 100 of 3,946, in address order. Complete list on RIPEstat

IPv6 prefixes (764 prefixes)

Prefix
2001:418:1401:4::/64
2001:418:1401:7::/64
2001:418:1401:18::/64
2001:418:1401:21::/64
2001:418:1401:25::/64
2001:418:1401:6a::/64
2001:418:1401:71::/64
2001:418:1401:7d::/64
2001:418:4001:2::/64
2001:418:4001:4::/64
2001:590:2005:200::/56
2001:c38:500a::/48
2001:4450:40::/48
2001:4457:ff0::/48
2001:4546:1003::/48
2401:fdc0:a000::/48
2403:c780:7203::/48
2404:c800:8203::/48
2405:2000:2c02::/48
2405:9600::/32
2600:1400::/24
2600:1400:800::/48
2600:1400:1800::/48
2600:1400:2800::/48
2600:1400:9000::/48
2600:1400:b000::/48
2600:1400:f000::/48
2600:1401:2000::/48
2600:1401:6000::/48
2600:1401:c000::/48
2600:1401:d000::/48
2600:1401:f000::/48
2600:1402:19::/48
2600:1402:400::/48
2600:1402:800::/48
2600:1402:1400::/48
2600:1402:1c00::/48
2600:1402:3000::/48
2600:1402:5000::/48
2600:1402:6800::/48
2600:1402:7800::/48
2600:1402:8000::/48
2600:1402:8800::/48
2600:1402:9800::/48
2600:1402:a800::/48
2600:1402:b800::/48
2600:1402:c000::/48
2600:1402:c800::/48
2600:1402:d800::/48
2600:1402:f000::/48
2600:1403:4000::/48
2600:1403:5400::/48
2600:1403:8400::/48
2600:1403:9400::/48
2600:1403:9c00::/48
2600:1403:a400::/48
2600:1403:ac00::/48
2600:1403:c400::/48
2600:1403:cc00::/48
2600:1403:d400::/48
2600:1403:dc00::/48
2600:1404:27::/48
2600:1404:200::/48
2600:1404:600::/48
2600:1404:a00::/48
2600:1404:e00::/48
2600:1404:1200::/48
2600:1404:1400::/48
2600:1404:1600::/48
2600:1404:1800::/48
2600:1404:2e00::/48
2600:1404:6400::/48
2600:1404:6c00::/48
2600:1404:8400::/48
2600:1404:b400::/48
2600:1404:cc00::/48
2600:1404:e400::/48
2600:1404:ec00::/48
2600:1404:f400::/48
2600:1404:fc00::/48
2600:1405:401::/48
2600:1405:801::/48
2600:1405:1000::/48
2600:1405:6400::/48
2600:1405:6c00::/48
2600:1405:7400::/48
2600:1405:7c00::/48
2600:1405:8400::/48
2600:1405:8c00::/48
2600:1405:9000::/48
2600:1405:a000::/48
2600:1405:b000::/48
2600:1405:b400::/48
2600:1405:bc00::/48
2600:1405:d000::/48
2600:1405:d400::/48
2600:1405:dc00::/48
2600:1405:e000::/48
2600:1405:e400::/48
2600:1405:ec00::/48

Showing the first 100 of 764, in address order. Complete list on RIPEstat

Neighbours

Upstreams (transit or peers) (280)

ASNetworkVisibility
AS1221Telstra Limited3,464
AS8151UNINET3,149
AS1299Arelion Sweden AB3,123
AS3356Level 3 Parent, LLC2,643
AS6453TATA COMMUNICATIONS (AMERICA) INC2,512
AS2914NTT America, Inc.2,458
AS9498BHARTI Airtel Ltd.2,425
AS4637Telstra Global2,229
AS7474SingTel Optus Pty Ltd2,223
AS2516KDDI CORPORATION2,189
AS174Cogent Communications, LLC2,018
AS6762TELECOM ITALIA SPARKLE S.p.A.1,842
AS4788TM TECHNOLOGY SERVICES SDN. BHD.1,822
AS9957KINX1,639
AS4755TATA Communications formerly VSNL is Leading ISP1,493
AS4766Korea Telecom1,373
AS3462-1,352
AS3257GTT Communications Inc.1,331
AS37100SEACOM Limited1,330
AS55836Reliance Jio Infocomm Limited1,208
AS57187-1,208
AS37662West Indian Ocean Cable Company1,108
AS12956TELEFONICA GLOBAL SOLUTIONS SL1,030
AS15924-1,006
AS6461Zayo Bandwidth1,000
AS4713NTT DOCOMO BUSINESS,Inc.940
AS9002RETN Limited936
AS6147-887
AS1273IDDQD-AS876
AS135814-863

The 30 most visible of 280.

Downstreams (customers) (14)

ASNetworkVisibility
AS16625Akamai Technologies, Inc.15,996
AS36183Akamai Technologies, Inc.9,720
AS63949Akamai Connected Cloud6,084
AS32787Akamai Technologies, Inc.2,025
AS33905Akamai International B.V.1,581
AS21342Akamai International B.V.1,445
AS35994Akamai Technologies, Inc.1,099
AS34164Akamai International B.V.1,071
AS24319Akamai Technologies Tokyo ASN888
AS200005Akamai International B.V.630
AS26008-397
AS17204-346
AS12222-344
AS31108-251

194 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.