Data as of Nov 8, 2026
156.29.16.0/24
No anonymizer space · no proxy exits in 30 daysMicrosoft Corporation · space held by City of San Diego
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 |
|---|---|---|---|---|---|---|
| 156.29.0.0/16 | 65,536 | SANNET1 | City of San Diego (CSD-108) · US | Direct Allocation | Nov 27, 1991 | DoIT-Networking-DNS@ |
| └ 156.29.16.0/24 | 256 | COSD-AZURE | Microsoft Azure (C11267831) · US | Reassigned | Jul 9, 2025 | DoIT-Networking-DNS@ via SANNET1 |
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
Registry
Holder
- Organization
- City of San Diego
- Handle
- CSD-108
- Range
- 156.
29. 0. 0/ 16 - Registration type
- Direct Allocation
- Record created
- Nov 27, 1991
- Legacy
- yes
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
- Stable
- First seen
- Jul 2025
- Current origin since
- Jul 2025 · 1.3 yr
- Origin networks
- 1
Whois
Registration for this announcement
- Range
- 156.
29. 16. 0/ 24 - Netname
- COSD-AZURE
- Registrant
- Microsoft Azure
- Organization
- Microsoft Azure (C11267831)
- Type
- Reassigned
- Handle
- NET-156-29-16-0-1
- Parent
- NET-156-29-0-0-1
- Created
- Jul 9, 2025
- RIR
- ARIN
- Country
- US
- Delegated
- Nov 27, 1991
- Status
- assigned
Report abuse
Abuse contact
- DoIT-Networking-DNS@
sandiego. gov - Name
- DoIT-Networking-DNS
- Phone
- +1-619-533-4872
- Handle
- DOITN-ARIN