Home Prefix Lookup2620:0:f00::/41

2620:0:f00::/41 - AT&T Enterprises (AS6431)

IPv6ARINallocatedAS6431ATT-RESEARCH - AT&T Enterprises, LLCNo ROA

CIDR

2620:0:f00::/41

IP Version

IPv6

Addresses

154.7Y

Mask

/41

Country

🇺🇸 United States

City

Washington D.C.

RIR

ARIN

Status

allocated

Allocated

2008-09-09

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Swipe sideways to see all columns →

Prefix	Origin AS	RPKI	IRR	Last Seen
2620:0:f00::/41	AS6431 ATT-RESEARCH - AT&T Enterprises, LLC	No ROA	-	2026-10-12

More-Specific Announcements

6 more-specific announcements

Prefix	Origin AS	RPKI	IRR	Last Seen
2620:0:f01::/48	AS6431 ATT-RESEARCH - AT&T Enterprises, LLC	No ROA	-	2026-10-12
2620:0:f40::/44	AS6431 ATT-RESEARCH - AT&T Enterprises, LLC	No ROA	-	2026-10-12
2620:0:f40::/48	AS7018 ATT-INTERNET4 - AT&T Enterprises, LLC	No ROA	-	2026-10-12
2620:0:f50::/44	AS6431 ATT-RESEARCH - AT&T Enterprises, LLC	No ROA	-	2026-10-12
2620:0:f60::/44	AS6431 ATT-RESEARCH - AT&T Enterprises, LLC	No ROA	-	2026-10-12
2620:0:f70::/44	AS6431 ATT-RESEARCH - AT&T Enterprises, LLC	No ROA	-	2026-10-12

Transfer History

Registry transfers of 2620:0:f00::/41, blocks inside it, or blocks containing it.

2620:0:f00::/41M&A · 2025-03-18
AT&T Labs., Inc.
🇺🇸 US ARIN
→
AT&T Enterprises, LLC
🇺🇸 US ARIN

Date	Resource	From	To	Type
2025-03-18	2620:0:f00::/41	AT&T Labs., Inc. 🇺🇸 US ARIN	AT&T Enterprises, LLC 🇺🇸 US ARIN	M&A

Origin ASN

AS6431

ATT-RESEARCH - AT&T Enterprises, LLC

Related Prefixes

More prefixes of AS6431

All prefixes of AS6431 →

Geolocation

Country🇺🇸United StatesUS

RegionDistrict of Columbia

CityWashington D.C.

Coordinates38.9072, -77.0369 ↗

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/2620:0:f00::/41

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

curl -s "https://api.ipctl.io/v1/prefix/2620:0:f00::/41" | jq

External Links

RIPEstat