Data as of Nov 14, 2026
128.203.0.0/16
No anonymizer space · no proxy exits in 30 daysMicrosoft Corporation · space held by Microsoft Limited
Registrations in this block
The registry's network records over the announcement: those covering it, widest first, then every record inside it, under its parent.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 128.203.0.0/16 | 65,536 | UK-MICROSOFT-19870219 | Microsoft Limited (ORG-MA42-RIPE) · GB | ALLOCATED PA | Sep 18, 2023 | abuse@ |
| └ 128.203.0.0/17 | 32,768 | cloud | unknown | ASSIGNED PA | Sep 5, 2025 | abuse@ via UK-MICROSOFT-19870219 |
| └ 128.203.128.0/17 | 32,768 | cloud | unknown | ASSIGNED PA | Sep 5, 2025 | abuse@ via UK-MICROSOFT-19870219 |
A contact marked “via” is the registry's: the record names none of its own, so the registry hands down its parent's.
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
- Rotating
- First seen
- Jan 2006
- Current origin since
- Jul 2024 · 2.4 yr
- Origin networks
- 2
- Last change of origin
- Jul 2024
Recorded history
History
- Handoffs
- 1
Whois
Registration for this announcement
- Range
- 128.
203. 0. 0/ 16 - Netname
- UK-MICROSOFT-19870219
- Registrant
- Microsoft Limited
- Registrant country
- GB
- Organization
- Microsoft Limited (ORG-MA42-RIPE)
- Org country
- GB
- Type
- ALLOCATED PA
- Created
- Sep 18, 2023
- Updated
- Sep 18, 2023
- Maintainer
- MICROSOFT-MAINT
- RIR
- RIPE NCC
- Country
- GB
- Delegated
- Feb 19, 1987
- Status
- assigned
Report abuse
Abuse contact
- abuse@
microsoft. com - Name
- Microsoft Abuse Contact
- Handle
- MAC274-RIPE