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Data as of Nov 3, 2026

156.40.246.0/24

No anonymizer space · no proxy exits in 30 days

U.S. Department of Health & Human Services · space held by National Institutes of Health

Announcement
this exact prefix
RPKI valid
Announced by
AS19050
Type
Business
Risk
0 / 100 · Low
Recent change
New origin Jul 2026
from AS19050 U.S. Department of Health & Human Services, after 1.2 years unannounced

Announcements

Less specific

Covering announcements

PrefixOriginTypeRPKI
156.40.0.0/16
since May 2020
AS3527Business

Registrations in this block

The registry's network records over the announcement: those covering it, widest first, then every record inside it, under its parent.

RangeAddressesNetnameHolderTypeCreatedAbuse contact
156.40.198.0 - 156.40.255.25514,848NIHNET-3National Institutes of Health (NIH-Z) · USDirect AllocationDec 9, 1991[email protected]
└ 156.40.246.0/24256UDHHS-4U.S. Department of Health & Human Services (C11646617) · USReassignedJul 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

AnnouncementRouting historyRPKI & IRRWhois & abuse
Registry

Holder

Organization
National Institutes of Health
Handle
NIH-Z
Range
156.40.198.0 - 156.40.255.255
Registration type
Direct Allocation
Record created
Dec 9, 1991
Legacy
yes
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