Data as of Nov 9, 2026
170.110.250.0/24
No anonymizer space · no proxy exits in 30 daysMicrosoft Corporation · space held by U.S. Department of Commerce, HQ and ITA
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Holder | RPKI |
|---|---|---|---|---|
| 170.110.0.0/16 since Dec 2017 | AS33343 | Business | U.S. Department of Commerce, HQ and ITA |
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 |
|---|---|---|---|---|---|---|
| 170.110.0.0/16 | 65,536 | ITA-B | U.S. Department of Commerce, HQ and ITA (UDCI-Z) · US | Direct Allocation | Apr 11, 1994 | arinpoc@ |
| └ 170.110.250.0/24 | 256 | DOC-AZURE-BYOIP | U.S. Department of Commerce, HQ and ITA (UDCI) · US | Reassigned | Jan 23, 2025 | — |
Network & registry
Registry
Holder
- Organization
- U.S. Department of Commerce, HQ and ITA
- Handle
- UDCI-Z
- Range
- 170.
110. 0. 0/ 16 - Registration type
- Direct Allocation
- Record created
- Apr 11, 1994
- 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
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- Apr 2025
- Current origin since
- Apr 2025 · 1.6 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 170.110.250.0/24 | AS8075 | /24 | ARIN | RPKI valid |
| 170.110.0.0/16 | AS33343 | /16 | ARIN | Another network |
Whois
Registration for this announcement
- Range
- 170.
110. 250. 0/ 24 - Netname
- DOC-AZURE-BYOIP
- Registrant
- U.S. Department of Commerce, HQ and ITA
- Organization
- U.S. Department of Commerce, HQ and ITA (UDCI)
- Org address
- ITA OCIO HCHB 48002, Washington, DC, 20230
- Org country
- US
- Type
- Reassigned
- Handle
- NET-170-110-250-0-1
- Parent
- NET-170-110-0-0-1
- Created
- Jan 23, 2025
- RIR
- ARIN
- Country
- US
- Delegated
- Apr 11, 1994
- Status
- assigned
Report abuse
Abuse contact
- arinpoc@
doc. gov - Name
- DOC ARIN POC
- Phone
- +1-202-482-5010
- Handle
- DAP30-ARIN