Autonomous system profile

Review registration details, announced prefixes, network relationships and historical snapshots.

AS12076

Announcement observedARIN

Microsoft Corporation · MICROSOFT

This profile is assembled from CHA.LA's normalized registration, routing and observation snapshots.

Last active10/30/2026, 19:33:15Snapshot expired

View network topology RDAP registration

ASN: AS12076
Registration country: United States
Name: Microsoft Corporation
Abbreviation: MICROSOFT
Registration date: 3/16/1999, 05:00:00
Status: Announcement observed
RIR: ARIN

Network relationships and announced prefixes

ASN / prefix	Description / organization	Geographic scope	First seen	Last active	IPv4	IPv6	Status
151.207.40.0/22BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/16/2026, 00:00:00	10/30/2026, 16:00:00	✓	×	Currently valid
151.207.44.0/22BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/16/2026, 00:00:00	10/30/2026, 16:00:00	✓	×	Currently valid

BGP prefixes have no geographic country; the column is marked not applicable.

Registration and sources

Organization: Microsoft Corporation
RIR: ARIN
Registration country: United States
Registration date: 3/16/1999, 05:00:00
Abuse contact: abuse@microsoft.com

Snapshot trend

10/30/2026, 19:33:152 v46 v63 Upstream · 0 Uncertain

9/30/2026, 06:10:042 v46 v62 Upstream · 0 Uncertain

ASN route snapshotThis page reads collected ASN, prefix, relationship and history data. External interfaces are used for initial collection and scheduled refreshes.Source keys: cha-la-external-routing · iana-rdap-asn-bootstrap · rir-rdap-asn