Country
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ASN LANDING PAGE
AS45139
MICROSOFT-AS-AP - Microsoft Corp
Last updated · Jul 20, 2026
Total prefixes
5
IPv4 prefixes
2
IPv6 prefixes
3
ASN summary
How to read the scale of AS45139
MICROSOFT-AS-AP - Microsoft Corp currently reports 5 prefixes and 4 upstream, downstream, or peer relationships. These counts describe the current dataset; they do not by themselves prove network quality, reach, or service use.
What can an ASN page answer?
An ASN page shows the public organization label, country or region, BGP prefixes, and available peer and upstream relationships. It adds network context but cannot confirm a website host, physical facility, security status, or service quality.
How should you read the organization and region fields?
MICROSOFT-AS-AP - Microsoft Corp is currently associated with an unknown region. These values come from public network sources and are useful lookup clues; an organization label, registration region, and actual service location may differ.
How should you verify the AS45139 result?
The page shows ASN data returned by the current upstream query; interpret it with the update time. Open representative IP pages from the same network and compare prefixes, source labels, and query times. Verify operator or service claims with the relevant registry or network operator.
How to verify this ASN result
AS45139 ASN lookupAS45139 BGPAS45139 peersAS45139 prefixesAS45139 upstreamsMICROSOFT-AS-AP - Microsoft Corp ASN
Upstreams
Detailed data for this ASN is not available right now.
Downstreams
Detailed data for this ASN is not available right now.
Peers
Prefix inventory
| Prefix | Name | Country |
|---|---|---|
| 167.220.226.0/23 | AS45139 | — |
| 167.220.227.0/24 | AS45139 | — |
| 2401:b640:17::/48 | AS45139 | — |
| 2404:f801:8020::/48 | AS45139 | — |
| 2404:f801:802c::/48 | AS45139 | — |
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Related lookups and next steps
Frequently asked questions about this ASN page
What does AS45139 represent?
AS45139 is an autonomous system number. The current source associates it with MICROSOFT-AS-AP - Microsoft Corp and the region field an unknown region; those values add network context but do not prove a specific service, physical location, or quality level.
What are peers, upstreams, and prefixes useful for on the AS45139 page?
They help explain the scale, interconnection depth, and route structure of AS45139. Richer peering and upstream data often indicate broader network reach, but they should still be interpreted together with prefixes and related IP landing pages.
What should you do after reviewing AS45139?
Open a concrete IP page to check how the address maps into AS45139, then compare the prefix, source labels, and query time. Verify operator or service claims with the relevant registry or network operator.
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