AS5761 Microsoft Corporation

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

IPv4 addresses2561 prefixes · <0.001% of announced IPv4

Rank in United States#13,287largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#61,033of 79,396 networks with IPv4

IPv61 x /481 prefixes

CountryUnited States18,679 ASNs registered there

Open AS5761 in ASN lookup Look up an IP in this network (157.58.216.1) All networks in United States

IPv4 prefixes

All 1 prefix, in address order.

157.58.216.0/24

IPv6 prefixes

All 1 prefix.

2001:4898:b080::/48

Other ASNs named Microsoft Corporation

11 other networks use the same organisation name; together with AS5761 they announce 82,657,024 IPv4 addresses.

ASNNameIPv4 addresses

AS8075MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation US80,749,056

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

AS6584MICROSOFT-GP-AS - Microsoft Corporation USIPv6 only

Similar-sized networks in United States

ASNNameIPv4 addresses

AS5068#13284 STACKSINC-GLOBAL - STACKS INC256

AS5081#13285 CCS-AS - CLARE COMPUTER SOLUTIONS256

AS5755#13286 SIAM-ASN-01 - SIAM256

AS6589#13288 ROZINT - Rozint256

AS10390#13289 TELECHECK - Fiserv Solutions, LLC256

AS11048#13290 DIGITALSTAKEOUT - DigitalStakeout256

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