Data as of Nov 5, 2026
137.187.192.0/23
No anonymizer space · no proxy exits in 30 daysNational Institutes of Health
Network & registry
Announced by
Covering announcement 137.187.0.0/16
- Prefix
- 137.187.0.0/16
- Announced by
- AS3527 National Institutes of Health
- Type
- Business
- RPKI
- RPKI valid
- Netname
- NIHNET-2
- 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
Who has announced 137.187.0.0/16
137.187.0.0/16
Routing history
- Pattern
- Stable
- First seen
- May 2005
- Current origin since
- May 2020 · 6.5 yr
- Origin networks
- 2
- Last change of origin
- May 2020
Recorded history
History
- Handoffs
- 2
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 137.187.0.0/16 | AS3527 | /25 | ARIN | RPKI valid |
Whois
Registration for this announcement
- Range
- 137.
187. 0. 0/ 16 - Netname
- NIHNET-2
- 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-137-187-0-0-1
- Parent
- NET-137-0-0-0-0
- Created
- Dec 13, 1989
- RIR
- ARIN
- Country
- US
- Delegated
- Dec 13, 1989
- Status
- assigned
Report abuse
Abuse contact
- citnsarin@
mail. nih. gov - Name
- NIHtechs
- Phone
- +1-301-402-3141
- Handle
- NIHTE-ARIN