Data as of Nov 4, 2026
156.40.224.0/19
No anonymizer space · no proxy exits in 30 daysNational Institutes of Health
Announcements
More specific
Announcements inside
| Prefix | Origin | Type | Holder | RPKI |
|---|---|---|---|---|
| 156.40.246.0/24 since Jul 2026 | AS19050 | Business | National Institutes of Health |
Registrations in this block
The registry's network records over this block, widest first, each under its parent.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 156.40.198.0 - 156.40.255.255 | 14,848 | NIHNET-3 | National Institutes of Health (NIH-Z) · US | Direct Allocation | Dec 9, 1991 | [email protected] |
| └ 156.40.246.0/24 | 256 | UDHHS-4 | U.S. Department of Health & Human Services (C11646617) · US | Reassigned | Jul 10, 2026 | [email protected] via NIHNET-3 |
A contact marked “via” is the registry's: the record names none of its own, so the registry hands down its parent's.
Network & registry
Announced by
Covering announcement 156.40.0.0/16
- Prefix
- 156.40.0.0/16
- Announced by
- AS3527 National Institutes of Health
- Type
- Business
- RPKI
- No RPKI
- RIR
- ARIN
Registry
Holder
- Organization
- Not stated by the 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
Who has announced 156.40.0.0/16
156.40.0.0/16
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
IRR
Route objects on 156.40.0.0/16
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS3527 | RADB | Proxy-registered route object for NIH | MAINT-AS10886 | Nov 13, 2023 |
Whois
Registration for this announcement
156.40.0.0/16 spans several registrations: 6 records are listed under Registrations.
- RIR
- ARIN
- Country
- US
- Delegated
- Dec 9, 1991
- Status
- assigned