Home Prefix Lookup37.143.0.0/22

37.143.0.0/22 - BT UK British Telecommunications Limited (AS2856)

IPv4RIPEassignedAS2856BT-UK-AS British Telecommunications Limited RPKI Valid

CIDR

37.143.0.0/22

IP Version

IPv4

Addresses

Mask

/22 (255.255.252.0)

Country

🇺🇸 United States

City

Miami

RIR

RIPE

Status

assigned

Allocated

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Swipe sideways to see all columns →

Prefix	Origin AS	RPKI	IRR	Last Seen
37.143.0.0/22	AS2856 BT-UK-AS British Telecommunications Limited	Valid	Other IRRRIPE	2026-10-11

More-Specific Announcements

3 more-specific announcements

Prefix	Origin AS	RPKI	IRR	Last Seen
37.143.0.0/24	AS7029 WINDSTREAM - Windstream Communications LLC	Valid	-	2026-10-11
37.143.1.0/24	AS7029 WINDSTREAM - Windstream Communications LLC	Valid	-	2026-10-11
37.143.2.0/24	AS7029 WINDSTREAM - Windstream Communications LLC	Valid	-	2026-10-11

RPKI ROAs

Prefix	Origin	Max Length	Trust Anchor
37.143.0.0/22	AS2856	/24	ripe
37.143.0.0/22	AS3320	/22	ripe
37.143.0.0/22	AS6079	/24	ripe
37.143.0.0/22	AS7018	/24	ripe
37.143.0.0/22	AS7029	/24	ripe
37.143.0.0/22	AS7843	/24	ripe
37.143.0.0/22	AS20115	/24	ripe
37.143.0.0/22	AS22773	/24	ripe
37.143.0.0/22	AS399955	/24	ripe

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS3320	Other IRR	MAINT-AS834	2023-11-13
AS7843	Other IRR	MAINT-AS834	2025-07-18
AS20115	Other IRR	MAINT-AS834	2025-07-18
AS22773	Other IRR	MAINT-AS834	2026-03-27
AS2856	Other IRR	MAINT-AS834	2025-10-30
AS6079	Other IRR	MAINT-AS834	2026-04-24
AS7018	Other IRR	MAINT-AS834	2024-01-03
AS7029	Other IRR	MAINT-AS834	2025-07-18
AS399955	Other IRR	MAINT-AS834	2026-04-25
AS7029	RIPE	netutils-mnt	2025-07-17
AS6079	RIPE	netutils-mnt	2026-04-24
AS22773	RIPE	netutils-mnt	2026-03-26
AS2856	RIPE	netutils-mnt	2025-10-30
AS7018	RIPE	netutils-mnt	2025-02-12
AS3320	RIPE	netutils-mnt	2025-02-12
AS7843	RIPE	netutils-mnt	2025-07-17
AS20115	RIPE	netutils-mnt	2025-07-17
AS399955	RIPE	netutils-mnt	2026-04-23

Origin ASN

AS2856

BT-UK-AS British Telecommunications Limited

Related Prefixes

More prefixes of AS2856

All prefixes of AS2856 →

Geolocation

Country🇺🇸United StatesUS

CityMiami

Coordinates25.7617, -80.1918 ↗

Abuse Contact

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 transfer marketTransfers published by all five RIRs

API

Open

GEThttps://api.ipctl.io/v1/prefix/37.143.0.0/22

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

curl -s "https://api.ipctl.io/v1/prefix/37.143.0.0/22" | jq

External Links

RIPEstat