Home Prefix Lookup204.52.188.0/24

204.52.188.0/24 - BT British Telecommunications Limited (AS5400)

IPv4ARINallocatedAS5400BT British Telecommunications LimitedNo ROA

CIDR

204.52.188.0/24

IP Version

IPv4

Addresses

256

Mask

/24 (255.255.255.0)

Country

🇬🇧 United Kingdom

City

London

RIR

ARIN

Status

allocated

Allocated

1994-07-07

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Swipe sideways to see all columns →

Prefix	Origin AS	RPKI	IRR	Last Seen
204.52.188.0/24	AS5400 BT British Telecommunications Limited	No ROA	ARIN	2026-10-11

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS5400	ARIN	MNT-KL-251	2025-01-10

Transfer History

Registry transfers of 204.52.188.0/24, blocks inside it, or blocks containing it.

204.52.188.0/24M&A · 2023-09-28
Millward Brown, Inc.
🇺🇸 US ARIN
→
KANTAR
🇺🇸 US ARIN

Date	Resource	From	To	Type
2023-09-28	204.52.188.0/24	Millward Brown, Inc. 🇺🇸 US ARIN	KANTAR 🇺🇸 US ARIN	M&A

Origin ASN

AS5400

BT British Telecommunications Limited

Related Prefixes

More prefixes of AS5400

All prefixes of AS5400 →

Geolocation

Country🇬🇧United KingdomGB

RegionEngland

CityLondon

Coordinates51.5134, -0.0891 ↗

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 transfers in the ARIN regionWho bought and sold address space recently

API

Open

GEThttps://api.ipctl.io/v1/prefix/204.52.188.0/24

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

curl -s "https://api.ipctl.io/v1/prefix/204.52.188.0/24" | jq

External Links

RIPEstat