Data as of Nov 3, 2026
158.73.183.0/24
No anonymizer space · no proxy exits in 30 daysU.S. Department of Health & Human Services · space held by U.S. Dept. of Health and Human Services
Announcement
this exact prefix
No RPKI
Announced by
Type
Business
Risk
0 / 100 · Low
Recent change
New origin Jun 2026
from AS19050 U.S. Department of Health & Human Services, after 2.1 years unannounced
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Holder | RPKI |
|---|---|---|---|---|
| 158.73.0.0/16 since Jun 2026 | AS7046 | Business | U.S. Dept. of Health and Human Services |
Network & registry
Origin network
AS19050
US
- Name
- U.S. Department of Health & Human Services
- Type
- Business
- Registered
- Oct 3, 2012
- Domain
- hhs.gov
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- May 2024
- Current origin since
- Jun 2026 · 4 mo
- Origin networks
- 1
Whois
Registration for this announcement
- Range
- 158.73.0.0/16
- Netname
- CMSNET
- Registrant
- U.S. Dept. of Health and Human Services
- Organization
- U.S. Dept. of Health and Human Services (UDHHS)
- Org address
- HHS/ASA/OCIO, Rockville, MD, 20852
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-158-73-0-0-1
- Parent
- NET-158-0-0-0-0
- Created
- Feb 15, 1992
- RIR
- ARIN
- Country
- US
- Delegated
- Feb 15, 1992
- Status
- assigned
Report abuse
Abuse contact
- [email protected]
- Name
- Abuse
- Phone
- +1-301-443-2893
- Handle
- ABUSE5037-ARIN