AS8075 Microsoft Corporation

MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation · registered in the United States

IPv4 addresses80,749,0561,331 prefixes · 2.577% of announced IPv4

Rank in United States#4largest network in US by IPv4 space, of 18,338 · 5.93% of US

Rank worldwide#5of 79,396 networks with IPv4

IPv6140 x /32 (9,177,684 x /48)232 prefixes

CountryUnited States18,679 ASNs registered there

Open AS8075 in ASN lookup Look up an IP in this network (1.186.0.1) All networks in United States

IPv4 prefixes

First 500 of 1,331 prefixes, in address order.

1.186.0.0/17
1.186.128.0/18
1.186.192.0/19
1.186.224.0/20
1.186.240.0/21
1.186.248.0/22
1.186.252.0/23
1.186.255.0/24
2.58.103.0/24
4.144.0.0/12
4.160.0.0/11
4.192.0.0/12
4.208.0.0/14
4.212.0.0/16
4.213.0.0/17
4.213.128.0/18
4.213.192.0/19
4.213.224.0/20
4.213.240.0/22
4.213.244.0/23
4.213.246.0/24
4.213.248.0/21
4.214.0.0/15
4.216.0.0/13
4.224.0.0/11
5.23.34.0/24
5.144.153.0/24
9.129.0.0/16
9.130.0.0/15
9.132.0.0/15
9.135.0.0/16
9.136.0.0/16
9.140.0.0/15
9.143.0.0/16
9.145.0.0/16
9.146.0.0/16
9.149.0.0/16
9.157.0.0/16
9.158.0.0/15
9.160.0.0/16
9.163.0.0/16
9.164.0.0/16
9.166.0.0/15
9.169.0.0/16
9.173.0.0/16
9.177.0.0/16
9.185.0.0/16
9.190.0.0/16
9.192.0.0/15
9.198.0.0/16
9.205.0.0/16
9.220.0.0/16
9.223.0.0/16
9.228.0.0/15
9.231.0.0/16
9.234.0.0/15
9.248.0.0/16
13.64.0.0/11
13.104.0.0/18
13.104.64.0/20
13.104.80.0/23
13.104.83.0/24
13.104.84.0/22
13.104.88.0/21
13.104.96.0/19
13.104.128.0/17
13.105.0.0/16
13.106.0.0/16
13.107.0.0/23
13.107.2.0/24
13.107.8.0/24
13.107.10.0/23
13.107.14.0/24
13.107.17.0/24
13.107.20.0/24
13.107.23.0/24
13.107.24.0/21
13.107.32.0/22
13.107.36.0/23
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13.107.44.0/22
13.107.53.0/24
13.107.55.0/24
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13.107.58.0/23
13.107.60.0/22
13.107.64.0/18
13.107.130.0/23
13.107.132.0/22
13.107.136.0/22
13.107.141.0/24
13.107.142.0/23
13.107.144.0/20
13.107.160.0/19
13.107.192.0/19
13.107.224.0/20
13.107.240.0/21
13.107.248.0/22
13.107.252.0/23
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13.117.0.0/16
13.118.0.0/15
13.123.0.0/16
13.240.0.0/14
13.254.0.0/24
13.254.4.0/24
20.0.0.0/11
20.33.7.0/24
20.33.82.0/24
20.33.94.0/24
20.33.139.0/24
20.33.142.0/24
20.33.146.0/24
20.33.154.0/24
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20.33.193.0/24
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20.33.203.0/24
20.33.204.0/24
20.36.0.0/16
20.37.0.0/18
20.37.64.0/19
20.37.96.0/19
20.37.128.0/17
20.38.0.0/16
20.39.0.0/19
20.39.32.0/20
20.39.48.0/21
20.39.56.0/23
20.39.60.0/22
20.39.64.0/18
20.39.128.0/17
20.40.0.0/14
20.44.0.0/16
20.45.0.0/17
20.45.128.0/20
20.45.144.0/20
20.45.160.0/19
20.45.192.0/18
20.46.0.0/19
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20.46.64.0/18
20.46.128.0/19
20.46.160.0/19
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20.47.35.0/24
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20.47.72.0/22
20.47.90.0/23
20.47.128.0/17
20.48.0.0/12
20.64.0.0/13
20.72.0.0/15
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20.75.0.0/16
20.76.0.0/14
20.80.0.0/12
20.96.0.0/11
20.135.0.0/16
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20.143.0.0/16
20.150.0.0/15
20.152.0.0/16
20.153.6.0/23
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20.157.0.0/23
20.157.45.0/24
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20.157.135.0/24
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20.157.140.0/23
20.157.154.0/24
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20.157.188.0/23
20.157.190.0/24
20.157.207.0/24
20.157.228.0/24
20.157.254.0/24
20.160.0.0/12
20.184.0.0/13
20.192.0.0/14
20.196.0.0/18
20.196.64.0/18
20.196.128.0/17
20.197.0.0/16
20.198.0.0/15
20.200.0.0/15
20.202.0.0/16
20.203.0.0/17
20.203.128.0/17
20.204.0.0/14
20.208.0.0/12
20.224.0.0/11
23.96.0.0/14
23.100.0.0/15
23.102.0.0/16
23.103.64.0/18
23.103.128.0/19
23.103.160.0/20
23.103.176.0/20
23.103.192.0/18
31.56.106.0/24
31.80.0.0/13
31.207.2.0/23
37.228.121.0/24
37.228.126.0/24
40.33.0.0/16
40.34.0.0/16
40.47.0.0/16
40.64.0.0/16
40.65.0.0/18
40.65.64.0/23
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40.65.128.0/17
40.66.0.0/15
40.68.0.0/14
40.74.0.0/15
40.76.0.0/14
40.80.0.0/18
40.80.64.0/22
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40.80.72.0/21
40.80.80.0/20
40.80.96.0/19
40.80.128.0/17
40.81.0.0/16
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40.87.0.0/19
40.87.32.0/22
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40.95.224.0/20
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40.96.0.0/13
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40.107.64.0/18
40.107.128.0/20
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40.107.192.0/18
40.108.0.0/19
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40.110.0.0/15
40.112.0.0/14
40.116.0.0/15
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40.119.128.0/18
40.119.192.0/18
40.120.0.0/20
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40.120.32.0/19
40.120.64.0/18
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40.121.0.0/16
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40.124.0.0/16
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40.126.0.0/18
40.126.128.0/18
40.126.192.0/23
40.126.194.0/23
40.126.196.0/22
40.126.200.0/21
40.126.208.0/20
40.126.224.0/19
40.127.0.0/19
40.127.32.0/19
40.127.64.0/18
40.127.128.0/17
40.146.0.0/16
40.148.0.0/16
40.155.0.0/16
40.159.0.0/16
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40.170.0.0/15
40.212.0.0/16
40.218.0.0/16
40.249.0.0/16
40.253.0.0/16
45.8.43.0/24
45.66.80.0/24
45.143.224.0/23
45.154.21.0/24
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46.29.242.0/24
46.254.176.0/24
46.254.179.0/24
46.254.180.0/22
48.160.0.0/11
48.192.0.0/10
50.20.0.0/18
50.20.64.0/19
50.20.128.0/18
50.85.0.0/16
51.1.0.0/16
51.4.0.0/15
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51.41.0.0/16
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52.105.128.0/18
52.105.192.0/22
52.105.196.0/23
52.105.198.0/23
52.105.200.0/21
52.105.208.0/20
52.105.224.0/19
52.106.0.0/15
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52.112.0.0/16
52.113.0.0/17
52.113.128.0/18
52.113.192.0/23
52.113.198.0/23
52.113.200.0/21
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52.113.224.0/19
52.114.0.0/15
52.120.0.0/15
52.122.36.0/22
52.122.48.0/22
52.122.212.0/22
52.122.216.0/22
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52.122.253.0/24
52.123.0.0/16
52.125.0.0/16
52.136.0.0/13
52.146.0.0/15
52.148.0.0/14
52.152.0.0/13
52.160.0.0/11
52.224.0.0/13
52.232.0.0/14
52.236.0.0/15
52.238.0.0/16
52.239.0.0/17
52.239.128.0/18
52.239.192.0/19
52.239.224.0/21
52.239.232.0/24
52.239.233.0/24
52.239.234.0/23
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52.240.0.0/12
54.15.0.0/16
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54.27.0.0/16
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54.104.0.0/16
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54.133.0.0/16
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57.13.0.0/16
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57.33.0.0/16
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57.150.0.0/15
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57.184.0.0/15
57.192.0.0/16
57.226.0.0/16
57.239.0.0/16

IPv6 prefixes

All 232 prefixes.

2001:67c:4f8::/48
2001:698::/47
2001:df0:7::/48
2001:df0:d7::/48
2001:df0:d8::/47
2001:df0:59c0::/48
2001:3bc0:b1d::/48
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2801:80:1d0::/48
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2a03:52a0:183::/48
2a04:9a00:1480::/48
2a04:9a00:1484::/48
2a04:9a00:1488::/48
2a04:9a00:148c::/48
2a04:b0c0:10::/46
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
2a0b:9e80:2000::/48
2a0c:4144:200::/48
2a0c:61c7:ace::/48
2a0e:b107:27c7::/48
2a10:dac0:96::/48
2a12:fc0::/48
2a13:49c0:ffff::/48
2a14:4b41:1300::/48
2a14:4e87:1000::/48
2a14:67c2:510::/48
2a14:67c2:575::/48
2a14:7583:e1a0::/48
2a14:d300:3::/48
2a14:f180:130b::/48
2a14:f180:1324::/48
2a14:f180:230b::/48
2a14:f180:2324::/48
2a14:f180:330b::/48
2a14:f180:3324::/48
2a14:f180:430b::/48
2a14:f180:4324::/47

Other ASNs named Microsoft Corporation

11 other networks use the same organisation name; together with AS8075 they announce 82,657,024 IPv4 addresses.

ASNNameIPv4 addresses

AS8070MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation US1,073,920

AS3598MICROSOFT-CORP-AS - Microsoft Corporation US531,200

AS8069MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation US285,184

AS8068MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation US9,984

AS12076MICROSOFT - Microsoft Corporation US2,048

AS54396NUANCE-MOBILITY - Microsoft Corporation US2,048

AS46182VAROLII - Microsoft Corporation US1,536

AS17144NUANCE-NOD - Microsoft Corporation US1,024

AS63314MSFT - Microsoft Corporation US768

AS5761MICROSOFT-CORP-MSN-AS-SATURN - Microsoft Corporation US256

AS6584MICROSOFT-GP-AS - Microsoft Corporation USIPv6 only

Similar-sized networks in United States

ASNNameIPv4 addresses

AS749#1 DNIC-AS-00749 - United States Department of Defense (DoD)222,038,272

AS16509#2 AMAZON-02 - Amazon.com, Inc.157,393,150

AS7018#3 ATT-INTERNET4 - AT&T Enterprises, LLC90,002,688

AS7922#5 COMCAST-7922 - Comcast Cable Communications, LLC42,195,200

AS701#6 UUNET - Verizon Business40,608,768

AS721#7 DNIC-ASBLK-00721-00726 - United States Department of Defense (DoD)29,541,376

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources