Home Prefix Lookup204.231.0.0/17

204.231.0.0/17 - BT British Telecommunications Limited (AS3300)

IPv4ARINallocatedAS3300BT British Telecommunications Limited RPKI Valid

CIDR

204.231.0.0/17

IP Version

IPv4

Addresses

32.7K

Mask

/17 (255.255.128.0)

Country

🇺🇸 United States

City

Boston (Downtown)

RIR

ARIN

Status

allocated

Allocated

1995-01-17

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Swipe sideways to see all columns →

Prefix	Origin AS	RPKI	IRR	Last Seen
204.231.0.0/17	AS3300 BT British Telecommunications Limited	Valid	ARIN	2026-10-11

RPKI ROAs

Prefix	Origin	Max Length	Trust Anchor
204.231.0.0/17	AS3300	/24	arin

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS3300	ARIN	MNT-INFO	2025-08-01

Origin ASN

AS3300

BT British Telecommunications Limited

Related Prefixes

More prefixes of AS3300

All prefixes of AS3300 →

Geolocation

Country🇺🇸United StatesUS

RegionMassachusetts

CityBoston (Downtown)

Coordinates42.3538, -71.0596 ↗

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/204.231.0.0/17

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

curl -s "https://api.ipctl.io/v1/prefix/204.231.0.0/17" | jq

External Links

RIPEstat