Data as of Nov 11, 2026
128.231.3.0/24
No anonymizer space · no proxy exits in 30 daysNational Institutes of Health
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Holder | RPKI |
|---|---|---|---|---|
| 128.231.0.0/16 since May 2020 | AS3527 | Business | National Institutes of Health |
Network & registry
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
Summary
Routing history
- Pattern
- Rotating
- First seen
- Nov 2019
- Current origin since
- Sep 2025 · 1.2 yr
- Origin networks
- 2
- Last change of origin
- Sep 2025
Recorded history
History
- Handoffs
- 2
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 128.231.0.0/16 | AS3527 | /25 | ARIN | RPKI valid |
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS3527 | RADB | Proxy-registered route object for NIH | MAINT-AS10886 | Nov 13, 2023 |
Whois
Registration for this announcement
- Range
- 128.
231. 0. 0/ 16 - Netname
- NIHNET-1
- 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-128-231-0-0-1
- Parent
- NET-128-0-0-0-0
- Created
- May 6, 1987
- RIR
- ARIN
- Country
- US
- Delegated
- May 6, 1987
- Status
- assigned
Report abuse
Abuse contact
- citnsarin@
mail. nih. gov - Name
- NIHtechs
- Phone
- +1-301-402-3141
- Handle
- NIHTE-ARIN