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Autonomous System

AS8075 · Microsoft Corporation

Overview

AS8075 is announced on the Internet: RIPE RIS route collectors currently see 1,222 IPv4 prefixes and 122 IPv6 prefixes originated by this network. Together, its IPv4 prefixes cover 81,105,152 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 127 upstream neighbours (transit providers or peers) and 7 downstream neighbours (customers or networks it carries). Its most visible upstreams are Arelion Sweden AB (AS1299), TATA Communications formerly VSNL is Leading ISP (AS4755), and Hurricane Electric LLC (AS6939). AS8075 was assigned by ARIN, and its registration country is United States.

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

The trace goes to 20.64.0.1, the first address of 20.64.0.0/10. 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 (1,222 prefixes)

PrefixAddresses
1.186.0.0/1665,536
2.58.103.0/24256
4.144.0.0/121,048,576
4.160.0.0/121,048,576
4.176.0.0/121,048,576
4.192.0.0/121,048,576
4.208.0.0/121,048,576
4.224.0.0/121,048,576
4.240.0.0/121,048,576
5.23.34.0/24256
5.144.153.0/24256
9.129.0.0/1665,536
9.130.0.0/1665,536
9.131.0.0/1665,536
9.132.0.0/1665,536
9.133.0.0/1665,536
9.135.0.0/1665,536
9.136.0.0/1665,536
9.140.0.0/1665,536
9.141.0.0/1665,536
9.143.0.0/1665,536
9.145.0.0/1665,536
9.146.0.0/1665,536
9.149.0.0/1665,536
9.157.0.0/1665,536
9.158.0.0/15131,072
9.160.0.0/1665,536
9.163.0.0/1665,536
9.164.0.0/1665,536
9.166.0.0/1665,536
9.167.0.0/1665,536
9.169.0.0/1665,536
9.173.0.0/1665,536
9.177.0.0/1665,536
9.185.0.0/1665,536
9.190.0.0/1665,536
9.192.0.0/15131,072
9.198.0.0/1665,536
9.205.0.0/1665,536
9.220.0.0/1665,536
9.223.0.0/1665,536
9.228.0.0/1665,536
9.229.0.0/1665,536
9.231.0.0/1665,536
9.234.0.0/15131,072
9.248.0.0/1665,536
13.64.0.0/112,097,152
13.104.0.0/14262,144
13.107.14.0/24256
13.117.0.0/1665,536
13.118.0.0/15131,072
13.123.0.0/1665,536
13.240.0.0/1665,536
13.241.0.0/1665,536
13.242.0.0/15131,072
13.254.0.0/24256
13.254.4.0/24256
20.0.0.0/112,097,152
20.33.0.0/1665,536
20.36.0.0/14262,144
20.37.64.0/198,192
20.40.0.0/13524,288
20.45.64.0/204,096
20.45.80.0/24256
20.45.128.0/204,096
20.46.32.0/198,192
20.46.32.0/24256
20.46.144.0/204,096
20.46.192.0/198,192
20.48.0.0/121,048,576
20.64.0.0/104,194,304
20.74.128.0/1732,768
20.135.0.0/1665,536
20.136.0.0/1732,768
20.143.0.0/1665,536
20.150.0.0/15131,072
20.152.0.0/1665,536
20.153.0.0/1665,536
20.157.0.0/1665,536
20.160.0.0/121,048,576
20.184.0.0/13524,288
20.192.0.0/104,194,304
20.196.0.0/1816,384
20.203.0.0/1732,768
23.96.0.0/14262,144
23.100.0.0/15131,072
23.102.0.0/1665,536
23.103.64.0/1816,384
23.103.128.0/1732,768
23.103.160.0/204,096
31.56.106.0/24256
31.80.0.0/13524,288
31.207.2.0/23512
37.228.121.0/24256
37.228.126.0/24256
40.33.0.0/1665,536
40.34.0.0/1665,536
40.47.0.0/1665,536
40.64.0.0/15131,072
40.66.0.0/1732,768

Showing the first 100 of 1,222, in address order. Complete list on RIPEstat

IPv6 prefixes (122 prefixes)

Prefix
2001:67c:4f8::/48
2001:698::/48
2001:698:1::/48
2001:df0:7::/48
2001:df0:d7::/48
2001:df0:d8::/48
2001:df0:d9::/48
2001:df0:59c0::/48
2001:3bc0:b1d::/48
2401:ef40::/48
2402:7d80::/48
2402:7d80:8888::/48
2404:f800::/32
2404:f802::/31
2407:30c0:184::/48
2407:30c0:186::/48
2602:801:600a::/48
2602:812:200a::/48
2602:f36c:fff::/48
2602:f73e::/48
2602:f742::/48
2602:f742:1::/48
2602:f742:2::/48
2602:f742:3::/48
2602:f742:5::/48
2602:f742:3f::/48
2602:f7be:102::/48
2602:f8d5:a0::/48
2602:f8d5:a1::/48
2602:f8d5:a3::/48
2602:f8d5:a6::/48
2602:f8d5:a8::/48
2602:fc31:4::/48
2602:fdeb:50::/48
2602:fdeb:52::/48
2602:fdeb:53::/48
2602:fdeb:54::/48
2602:fdeb:55::/48
2602:fdeb:61::/48
2602:fdeb:62::/48
2602:fdeb:63::/48
2602:fdeb:64::/48
2603:1000::/25
2603:1061:6::/48
2603:1062:3::/48
2603:1062:4::/48
2604:d890:3::/48
2604:e700:41::/48
2606:50c0:c0de::/48
2606:e540:c00::/48
2606:e540:c01::/48
2606:e540:c04::/48
2607:33c0:a0::/48
2607:9240:40::/48
2607:9240:41::/48
2607:9240:43::/48
2607:9240:44::/48
2607:9240:47::/48
2607:9240:48::/48
2607:9240:49::/48
2607:9240:4a::/48
2620:0:30::/45
2620:7d:d::/48
2620:7d:e::/48
2620:7d:f::/48
2620:b1:e000::/48
2620:bc:2000::/48
2620:119:5077::/48
2620:12c:9005::/48
2620:12c:90b0::/48
2620:12c:90c1::/48
2620:147:d11::/48
2620:1ec::/36
2620:1ec:9::/48
2620:1ec:25::/48
2801:80:1d0::/48
2a00:1c68::/29
2a01:111::/32
2a01:111:2000::/36
2a01:111:4000::/36
2a01:111:4004::/48
2a01:111:f000::/36
2a02:d21::/48
2a02:4a00:8075::/48
2a03:52a0:183::/48
2a04:9a00:1480::/48
2a04:9a00:1484::/48
2a04:9a00:1488::/48
2a04:9a00:148c::/48
2a04:b0c0:10::/48
2a04:b0c0:11::/48
2a04:b0c0:12::/48
2a04:b0c0:13::/48
2a05:6340:400::/48
2a05:c341::/48
2a05:e100:a::/48
2a05:f500:2::/48
2a07:3502:1191::/48
2a07:54c4:1756::/48
2a0a:d685:1d0::/48

Showing the first 100 of 122, in address order. Complete list on RIPEstat

Neighbours

Upstreams (transit or peers) (127)

ASNetworkVisibility
AS1299Arelion Sweden AB351
AS4755TATA Communications formerly VSNL is Leading ISP260
AS6939Hurricane Electric LLC246
AS6762TELECOM ITALIA SPARKLE S.p.A.219
AS3356Level 3 Parent, LLC216
AS174Cogent Communications, LLC143
AS6453TATA COMMUNICATIONS (AMERICA) INC55
AS9002RETN Limited40
AS25091IP-Max SA40
AS34549meerfarbig GmbH & Co. KG40
AS12956TELEFONICA GLOBAL SOLUTIONS SL36
AS3491PCCW Global (HK) Ltd.31
AS13030Init7 (Switzerland) Ltd.26
AS35280F5 Networks SARL25
AS34019Hivane Association24
AS2914NTT America, Inc.23
AS3320Deutsche Telekom AG23
AS8220COLT Technology Services Group Limited21
AS8758Iway AG18
AS14840BR.Digital Telecom18
AS34177Celeste SAS18
AS3935131173 Services AB18
AS29632Netassist International EOOD17
AS50304Blix Solutions AS17
AS6057Administracion Nacional de Telecomunicaciones16
AS12310-16
AS20485Joint Stock Company TransTeleCom16
AS20764CJSC RASCOM16
AS24961WIIT AG16
AS29691-16

The 30 most visible of 127.

Downstreams (customers) (7)

ASNetworkVisibility
AS8069Microsoft Corporation819
AS8068Microsoft Corporation675
AS8070Microsoft Corporation321
AS3598Microsoft Corporation317
AS5761Microsoft Corporation311
AS58593Shanghai Blue Cloud Technology Co.,Ltd307
AS62540Drake Holdings LLC267

158 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.