Data as of Nov 6, 2026
165.112.138.0/24
No anonymizer space · no proxy exits in 30 daysNational Institutes of Health
Announced by
Type
Business
Risk
30 / 100 · Medium
Recently moved
Recent change
New origin Sep 18, 2026
from AS30387 National Institutes of Health
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Holder | RPKI |
|---|---|---|---|---|
| 165.112.0.0/16 since Feb 2020 | AS3527 | Business | National Institutes of Health |
Network & registry
Announced by
Covering announcement 165.112.136.0/21
- Prefix
- 165.112.136.0/21
- Announced by
- AS3527 National Institutes of Health
- Type
- Business
- RPKI
- RPKI valid
- Netname
- NIHNET-4-B
- Registrant
- National Institutes of Health
- RIR
- ARIN
Origin network
AS3527
US
- Name
- National Institutes of Health
- Type
- Business
- Registered
- Apr 7, 1994
- Domain
- nih.gov
- Industry
- Government and Regulatory Agencies, Administrations, Departments, and Services
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
165.112.136.0/21
Routing history
- Pattern
- Rotating
- First seen
- Aug 2009
- Current origin since
- Sep 18, 2026 · 2 mo
- Origin networks
- 2
- Last change of origin
- Sep 18, 2026
Recorded history
History
- Handoffs
- 3
- Also announced by
- 30387
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 165.112.136.0/21 | AS30387 | /27 | ARIN | Another network |
| 165.112.0.0/16 | AS3527 | /25 | ARIN | RPKI valid |
Whois
Registration for this announcement
- Range
- 165.
112. 0. 0/ 16 - Netname
- NIHNET-4-B
- Registrant
- National Institutes of Health
- Organization
- National Institutes of Health (NIH-Z)
- Org address
- 9000 Rockville Pike, Bethesda, MD, 20892-4805
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-165-112-0-0-1
- Parent
- NET-165-0-0-0-0
- Created
- May 19, 1993
- RIR
- ARIN
- Country
- US
- Delegated
- May 19, 1993
- Status
- assigned
Report abuse
Abuse contact
- citnsarin@
mail. nih. gov - Name
- NIHtechs
- Phone
- +1-301-402-3141
- Handle
- NIHTE-ARIN