Home Prefix Lookup66.161.72.0/24

66.161.72.0/24 - AT&T Enterprises (AS2386)

IPv4ARINannouncedAS2386INS-AS - AT&T Enterprises, LLC RPKI Valid

CIDR

66.161.72.0/24

IP Version

IPv4

Addresses

256

Mask

/24 (255.255.255.0)

Country

🇺🇸 United States

City

Santa Ana (Downtown)

RIR

ARIN

Status

announced

Allocated

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

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Prefix	Origin AS	RPKI	IRR	Last Seen
66.161.72.0/24	AS2386 INS-AS - AT&T Enterprises, LLC	Valid	ARIN	2026-10-11

Covering Prefix

1 less-specific announcement

Prefix	Origin AS	RPKI	IRR	Last Seen
66.161.0.0/17	AS7018 ATT-INTERNET4 - AT&T Enterprises, LLC	Valid	-	2026-10-11

RPKI ROAs

Prefix	Origin	Max Length	Trust Anchor
66.161.72.0/24	AS2386	/24	arin
66.161.0.0/17	AS7018	/17	arin

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS2386	ARIN	MNT-AEL-360	2026-08-13

Transfer History

Registry transfers of 66.161.72.0/24, blocks inside it, or blocks containing it.

66.161.0.0/17M&A · 2024-12-05
AT&T Corp.
🇺🇸 US ARIN
→
AT&T Enterprises, LLC
🇺🇸 US ARIN
66.161.0.0/17M&A · 2018-07-19
AT&T Internet Services
🇺🇸 US ARIN
→
AT&T Corp.
🇺🇸 US ARIN

Date	Resource	From	To	Type
2024-12-05	66.161.0.0/17	AT&T Corp. 🇺🇸 US ARIN	AT&T Enterprises, LLC 🇺🇸 US ARIN	M&A
2018-07-19	66.161.0.0/17	AT&T Internet Services 🇺🇸 US ARIN	AT&T Corp. 🇺🇸 US ARIN	M&A

Origin ASN

AS2386

INS-AS - AT&T Enterprises, LLC

Related Prefixes

Covering prefix

66.161.0.0/17AS7018

More prefixes of AS2386

All prefixes of AS2386 →

Geolocation

Country🇺🇸United StatesUS

RegionCalifornia

CitySanta Ana (Downtown)

Coordinates33.7507, -117.8750 ↗

Learn more

RPKI and ROAs explainedWhat RPKI valid, invalid and no ROA mean
RPKI validatorCheck ROA coverage for any prefix or ASN
What is BGP?How prefixes are announced and routed
More-specific prefixesGlossary: covering and more-specific routes
IPv4 transfers in the ARIN regionWho bought and sold address space recently

API

Open

GEThttps://api.ipctl.io/v1/prefix/66.161.72.0/24

Returns prefix allocation, BGP routes, and more-specific subnets.

curl -s "https://api.ipctl.io/v1/prefix/66.161.72.0/24" | jq

External Links

RIPEstat