Microsoft Corp
AS45139 is Microsoft Corp (microsoft.com). It announces 512 IPv4 addresses in 2 prefixes, and 2 IPv6 prefixes.
Singapore· APNIC· allocated 2008-03-07· business
Where its space is
The IPv4 it announces that IP Geolocation places, by country. A /24 counts for the AS announcing most of it.
- India512 · 100.00%
Registry record
Its ASN Whois record, as the registry publishes it.
- handle
- MICROSOFT-AS-AP
- name
- Microsoft Singapore Pte. Ltd.
- org
- ORG-MSPL4-AP
- org name
- Microsoft Singapore Pte. Ltd.
- org address
- One Microsoft Way
- org country
- US
- country
- SG
- source
- apnic
- updated
- 2020-07-07
- descr
- Microsoft Corp
- remarks
- For routing problems with this ASN contact the admin-c
- maintainer
- APNIC-HM
- maintainer email
- helpdesk@apnic.net
- abuse
- AM2589-AP
- abuse name
- ABUSE MICROSOFTAPNICSG
- abuse email
- abuse@microsoft.com
- abuse kind
- role
- admin
- NK160-AP
- tech
- NK160-AP
What the databases see
Addresses each address-keyed database holds in the IPv4 it announces, as a share of that space, with its largest providers. Counts overlap.
- None here
- None here
- None here
- None here
- None here
- None here
- Hosting IP512azure100.00%
- None here
- None here
- None here
- None here
- None here
- None here
IPv4 prefixes
Every IPv4 prefix BGP Route saw it announce. A prefix another AS also announces says so.
| PREFIX | COUNTRY | RPKI | PEERS | FIRST SEEN |
|---|---|---|---|---|
| 167.220.226.0/23 | India | valid | 17 | 2026-10-02 |
| 167.220.227.0/24 | India | valid | 17 | 2026-10-02 |
IPv6 prefixes
Every IPv6 prefix BGP Route saw it announce.
Test the real build first.
An evaluation license puts a full current build in your hands — every row, every column, no sampling — so you can measure it against your own traffic before anyone talks about terms.