Data as of Nov 8, 2026
138.242.0.0/16
No anonymizer space · no proxy exits in 30 daysMicrosoft Corporation · space held by Microsoft Limited
Announcement
this exact prefix
RPKI valid
Announced by
Type
Hosting
Risk
50 / 100 · Medium
Recently moved
Recent change
New origin May 2026
from AS206 DXC US Latin America Corporation, after 20.9 years unannounced
Network & registry
Origin network
AS8075
US
- Name
- Microsoft Corporation
- Type
- Hosting
- Registered
- Mar 31, 1997
- Domain
- microsoft.com
- Website
- www.microsoft.com
- Industry
- Software Development
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced this prefix
Summary
Routing history
- Pattern
- Reactivated
- First seen
- May 2005
- Current origin since
- May 2026 · 5 mo
- Origin networks
- 2
- Last change of origin
- May 2026
Recorded history
History
- Handoffs
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 138.242.0.0/16 | AS8075 | /16 | RIPE | RPKI valid |
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS8075 | RADB | Microsoft | MAINT-AS8075 | Apr 21, 2026 |
IRR inside
Route objects inside
| Prefix | Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|---|
| 138.242.96.0/20 | AS4657 | REACH | REACH (Customer Route) | MAINT-REACH-NOC | Feb 22, 2006 |
| 138.242.96.0/21 | AS4657 | REACH | REACH (Customer Route) | MAINT-REACH-NOC | Feb 22, 2006 |
| 138.242.104.0/21 | AS4657 | REACH | REACH (Customer Route) | MAINT-REACH-NOC | Feb 22, 2006 |
| 138.242.192.0/19 | AS10127 | REACH | REACH (Customer Route) | MAINT-REACH-NOC | Nov 29, 2007 |
| 138.242.192.0/19 | AS17916 | REACH | REACH (Customer Route) | MAINT-REACH-NOC | Nov 3, 2004 |
Whois
Registration for this announcement
- Range
- 138.
242. 0. 0/ 16 - Netname
- UK-MICROSOFT-19900611
- Registrant
- Microsoft Limited
- Registrant country
- GB
- Organization
- Microsoft Limited (ORG-MA42-RIPE)
- Org country
- GB
- Type
- ALLOCATED PA
- Created
- Jul 15, 2024
- Updated
- Jul 15, 2024
- Maintainer
- MICROSOFT-MAINT
- RIR
- RIPE NCC
- Country
- GB
- Delegated
- Jun 11, 1990
- Status
- assigned
Report abuse
Abuse contact
- abuse@
microsoft. com - Name
- Microsoft Abuse Contact
- Handle
- MAC274-RIPE