Home Prefix Lookup166.72.0.0/16

166.72.0.0/16 - AT&T Enterprises (AS7018)

IPv4ARINallocatedAS7018ATT-INTERNET4 - AT&T Enterprises, LLC RPKI Valid

CIDR

166.72.0.0/16

IP Version

IPv4

Addresses

65.5K

Mask

/16 (255.255.0.0)

Country

🇺🇸 United States

City

Reston

RIR

ARIN

Status

allocated

Allocated

1993-11-01

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Swipe sideways to see all columns →

Prefix	Origin AS	RPKI	IRR	Last Seen
166.72.0.0/16	AS7018 ATT-INTERNET4 - AT&T Enterprises, LLC	Valid	-	2026-10-11

RPKI ROAs

Prefix	Origin	Max Length	Trust Anchor
166.72.0.0/16	AS7018	/16	arin

Transfer History

Registry transfers of 166.72.0.0/16, blocks inside it, or blocks containing it.

166.72.0.0/16M&A · 2024-12-05
AT&T Corp.
🇺🇸 US ARIN
→
AT&T Enterprises, LLC
🇺🇸 US ARIN
166.72.0.0/16M&A · 2022-09-09
AT&T Global Network Services, LLC
🇺🇸 US ARIN
→
AT&T Corp.
🇺🇸 US ARIN

Date	Resource	From	To	Type
2024-12-05	166.72.0.0/16	AT&T Corp. 🇺🇸 US ARIN	AT&T Enterprises, LLC 🇺🇸 US ARIN	M&A
2022-09-09	166.72.0.0/16	AT&T Global Network Services, LLC 🇺🇸 US ARIN	AT&T Corp. 🇺🇸 US ARIN	M&A

Origin ASN

AS7018

ATT-INTERNET4 - AT&T Enterprises, LLC

Related Prefixes

More prefixes of AS7018

All prefixes of AS7018 →

Geolocation

Country🇺🇸United StatesUS

RegionVirginia

CityReston

Coordinates38.9586, -77.3570 ↗

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/166.72.0.0/16

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

curl -s "https://api.ipctl.io/v1/prefix/166.72.0.0/16" | jq

External Links

RIPEstat