Data as of Nov 3, 2026

158.70.0.0/16

No anonymizer space · no proxy exits in 30 days

U.S. Dept. of Health and Human Services

Announcement

this exact prefix

No RPKI

Announced by

AS26810

Type

Business

83% of it

Announcements

Nesting

More-specifics by size

Sized by addresses, colored by each announcement's type. Click a tile with children to zoom in, a leaf to open it.

More specific

Announcements inside

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Prefix	Origin	Type	Holder
158.70.8.0/23 since Jun 2017	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.8.0/24 since Aug 2016	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.9.0/24 since Aug 2016	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.10.0/24 since Aug 2016	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.11.0/24 since Aug 2016	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.12.0/24 since Aug 2016	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.13.0/24 since Aug 2016	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.14.0/24 since Aug 2016	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.15.0/24 since Aug 2016	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.18.0/24 since Feb 2017	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.19.0/24 since Aug 2016	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.20.0/24 since Sep 2017	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.21.0/24 since Aug 2016	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.24.0/24 since Aug 2016	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.25.0/24 since Aug 2016	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.26.0/24 since Aug 2016	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.27.0/24 since Aug 2016	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.28.0/23 since Jun 2017	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.28.0/24 since Aug 2016	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.29.0/24 since Aug 2016	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.33.0/24 since Apr 2016	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.34.0/24 since Aug 2016	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.35.0/24 since Aug 2016	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.36.0/24 since Aug 2016	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.37.0/24 since Aug 2016	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.38.0/24 since Feb 2017	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.39.0/24 since Aug 2016	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.40.0/24 since Feb 2017	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.41.0/24 since Feb 2017	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.42.0/24 since Mar 2016	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.43.0/24 since May 2016	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.113.0/24 since Feb 2017	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.128.0/24 since Aug 2019	AS7046	Business	U.S. Dept. of Health and Human Services
158.70.129.0/24 since May 2016	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.130.0/24 since Aug 2016	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.131.0/24 since Aug 2016	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.132.0/24 since Aug 2016	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.133.0/24 since Aug 2016	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.134.0/24 since Aug 2016	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.135.0/24 since Aug 2016	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.136.0/24 since Aug 2016	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.137.0/24 since Aug 2016	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.138.0/24 since Aug 2016	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.139.0/24 since Aug 2016	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.144.0/24 since Aug 2019	AS26810	Business	U.S. Dept. of Health and Human Services
158.70.146.0/23 since Oct 2017	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.146.0/24 since Aug 2016	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.147.0/24 since Jun 2016	AS7046	Unknown	U.S. Dept. of Health and Human Services
158.70.174.0/24 since May 2016	AS7046	Unknown	U.S. Dept. of Health and Human Services

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.

Range	Addresses	Netname	Holder	Type	Created	Abuse contact
158.70.0.0/16	65,536	NET-HHS1	U.S. Dept. of Health and Human Services (UDHHS) · US	Direct Allocation	Feb 15, 1992	—
└ 158.70.8.0/21	2,048	DHHS-OIG-NETWORK	U.S. Dept. of Health & Human Service/Office of Inspector General (C02269825) · US	Reassigned	Jul 7, 2009	—
└ 158.70.16.0/21	2,048	DHHS-OIG-NETWORK	U.S. Dept. of Health & Human Service/Office of Inspector General (C02269835) · US	Reassigned	Jul 7, 2009	—
└ 158.70.24.0/22	1,024	DHHS-OIG-NETWORK	U.S. Dept. of Health & Human Service/Office of Inspector General (C02269823) · US	Reassigned	Jul 7, 2009	—
└ 158.70.28.0/23	512	DHHS-OIG-NETWORK	U.S. Dept. of Health & Human Service/Office of Inspector General (C02269819) · US	Reassigned	Jul 7, 2009	—
└ 158.70.32.0/21	2,048	DHHS-OIG-NETWORK	U.S. Dept. of Health & Human Service/Office of Inspector General (C02269834) · US	Reassigned	Jul 7, 2009	—
└ 158.70.40.0/22	1,024	DHHS-OIG-NETWORK	U.S. Dept. of Health & Human Service/Office of Inspector General (C02269822) · US	Reassigned	Jul 7, 2009	—
└ 158.70.112.0/23	512	DHHS-OIG-NETWORK	U.S. Dept. of Health & Human Service/Office of Inspector General (C02269429) · US	Reassigned	Jul 6, 2009	—
└ 158.70.129.0/24	256	DHHS-OIG-NETWORK	U.S. Dept. of Health & Human Service/Office of Inspector General (C02269833) · US	Reassigned	Jul 7, 2009	—
└ 158.70.130.0/23	512	DHHS-OIG-NETWORK	U.S. Dept. of Health & Human Service/Office of Inspector General (C02269821) · US	Reassigned	Jul 7, 2009	—
└ 158.70.132.0/22	1,024	DHHS-OIG-NETWORK	U.S. Dept. of Health & Human Service/Office of Inspector General (C02269818) · US	Reassigned	Jul 7, 2009	—
└ 158.70.136.0/22	1,024	DHHS-OIG-NETWORK	U.S. Dept. of Health & Human Service/Office of Inspector General (C02269801) · US	Reassigned	Jul 7, 2009	—
└ 158.70.146.0/23	512	DHHS-OIG-NETWORK	U.S. Dept. of Health & Human Service/Office of Inspector General (C02269820) · US	Reassigned	Jul 7, 2009	—
└ 158.70.174.0/24	256	DHHS-OIG-NETWORK	U.S. Dept. of Health & Human Service/Office of Inspector General (C02269817) · US	Reassigned	Jul 7, 2009	—

Composition

The types across the prefix's announced space, by addresses.

Announced space

Address share

Announced space

Types across the prefix

65,536 addresses

Type	Addresses	Share	Ranges
Business	54,272	83%	12
Unknown	11,264	17%	44

Network & registry

Announcement Routing history Whois & abuse

Origin network

AS26810

Name: U.S. Dept. of Health and Human Services
Type: Education
Registered: Nov 25, 2002
Domain: hhs.gov
Industry: Internet Service Provider (ISP)
Spamhaus ASN-DROP: not listed

158.70.0.0/16

Announcements

More-specifics by size

Announcements inside

Registrations in this block

Composition

Address share

Types across the prefix

Network & registry

AS26810

Who has announced this prefix

Routing history

History

Registration for this announcement

Abuse contact