Home Prefix Lookup2600:300::/24

2600:300::/24 - AT&T Enterprises (AS7018)

IPv6ARINallocatedAS7018ATT-INTERNET4 - AT&T Enterprises, LLCNo ROA

CIDR

2600:300::/24

IP Version

IPv6

Addresses

20282409.6Y

Mask

/24

Country

🇺🇸 United States

City

Ashburn

RIR

ARIN

Status

allocated

Allocated

2011-10-21

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Swipe sideways to see all columns →

Prefix	Origin AS	RPKI	IRR	Last Seen
2600:300::/24	AS7018 ATT-INTERNET4 - AT&T Enterprises, LLC	No ROA	-	2026-10-12

More-Specific Announcements

23 more-specific announcements on this page, 223 in total

Prefix	Origin AS	RPKI	IRR	Last Seen
2600:384:100::/40	AS7287 PBI-NET-BLK2 - AT&T Enterprises, LLC	No ROA	-	2026-10-12
2600:384:300::/40	AS7287 PBI-NET-BLK2 - AT&T Enterprises, LLC	No ROA	-	2026-10-12
2600:384:500::/40	AS7287 PBI-NET-BLK2 - AT&T Enterprises, LLC	No ROA	-	2026-10-12
2600:384:900::/40	AS7287 PBI-NET-BLK2 - AT&T Enterprises, LLC	No ROA	-	2026-10-12
2600:384:d00::/40	AS7287 PBI-NET-BLK2 - AT&T Enterprises, LLC	No ROA	-	2026-10-12
2600:384:1000::/40	AS7287 PBI-NET-BLK2 - AT&T Enterprises, LLC	No ROA	-	2026-10-12
2600:384:1100::/42	AS7287 PBI-NET-BLK2 - AT&T Enterprises, LLC	No ROA	-	2026-10-12
2600:384:1200::/40	AS7287 PBI-NET-BLK2 - AT&T Enterprises, LLC	No ROA	-	2026-10-12
2600:384:1300::/42	AS7287 PBI-NET-BLK2 - AT&T Enterprises, LLC	No ROA	-	2026-10-12
2600:384:1340::/42	AS7287 PBI-NET-BLK2 - AT&T Enterprises, LLC	No ROA	-	2026-10-12
2600:387::/48	AS20057 ATT-MOBILITY-LLC-AS20057 - AT&T Enterprises, LLC	No ROA	-	2026-10-12
2600:387:1::/48	AS20057 ATT-MOBILITY-LLC-AS20057 - AT&T Enterprises, LLC	No ROA	-	2026-10-12
2600:387:2::/48	AS20057 ATT-MOBILITY-LLC-AS20057 - AT&T Enterprises, LLC	No ROA	-	2026-10-12
2600:387:3::/48	AS20057 ATT-MOBILITY-LLC-AS20057 - AT&T Enterprises, LLC	No ROA	-	2026-10-12
2600:387:4::/48	AS20057 ATT-MOBILITY-LLC-AS20057 - AT&T Enterprises, LLC	No ROA	-	2026-10-12
2600:387:5::/48	AS20057 ATT-MOBILITY-LLC-AS20057 - AT&T Enterprises, LLC	No ROA	-	2026-10-12
2600:387:6::/48	AS20057 ATT-MOBILITY-LLC-AS20057 - AT&T Enterprises, LLC	No ROA	-	2026-10-12
2600:387:7::/48	AS20057 ATT-MOBILITY-LLC-AS20057 - AT&T Enterprises, LLC	No ROA	-	2026-10-12
2600:387:8::/48	AS20057 ATT-MOBILITY-LLC-AS20057 - AT&T Enterprises, LLC	No ROA	-	2026-10-12
2600:387:9::/48	AS20057 ATT-MOBILITY-LLC-AS20057 - AT&T Enterprises, LLC	No ROA	-	2026-10-12
2600:387:a::/48	AS20057 ATT-MOBILITY-LLC-AS20057 - AT&T Enterprises, LLC	No ROA	-	2026-10-12
2600:387:b::/48	AS20057 ATT-MOBILITY-LLC-AS20057 - AT&T Enterprises, LLC	No ROA	-	2026-10-12
2600:387:14::/48	AS13965 SBCIS-FYTVAR - AT&T Enterprises, LLC	No ROA	-	2026-10-12

Transfer History

Registry transfers of 2600:300::/24, blocks inside it, or blocks containing it.

2600:300::/24M&A · 2025-03-18
AT&T Mobility LLC
🇺🇸 US ARIN
→
AT&T Enterprises, LLC
🇺🇸 US ARIN

Date	Resource	From	To	Type
2025-03-18	2600:300::/24	AT&T Mobility LLC 🇺🇸 US ARIN	AT&T Enterprises, LLC 🇺🇸 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

CityAshburn

Coordinates39.0438, -77.4874 ↗

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/2600:300::/24

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

curl -s "https://api.ipctl.io/v1/prefix/2600:300::/24" | jq

External Links

RIPEstat