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Data as of Nov 7, 2026

204.231.128.0/18

No anonymizer space · no proxy exits in 30 days

British Telecommunications Limited · space held by INFONET Services Corporation

Announcement
this exact prefix
RPKI valid
Announced by
AS3300
Type
Residential
>99% of it

Registrations in this block

The registry's network records over the announcement: those covering it, widest first, then every record inside it, under its parent.

RangeAddressesNetnameHolderTypeCreatedAbuse contact
204.231.0.0 - 204.231.191.25549,152BT-IP-ICG-GIIB-BLK13INFONET Services Corporation (INFO) · USDirect AllocationJan 17, 1995matthias.blum@bt.com
└ 204.231.133.0/24256INFORMIX3-133unknown———
└ 204.231.134.0/23512FLUOROWARE4unknown———
└ 204.231.136.0/23512PAN-AMP1unknown———
└ 204.231.138.0/24256PERSTORPSunknown———
└ 204.231.139.0 - 204.231.140.255512SPILLERS6unknown———
└ 204.231.141.0/24256RESERVED-ROUTE1unknown———
└ 204.231.144.64/2816ESTERLINE-TECHNOLS4unknown———
└ 204.231.159.0/2732SOLUTION6unknown———
└ 204.231.170.0/24256SYQUEST3unknown———
└ 204.231.190.0/2816ETEC1unknown———

Composition

The types across the prefix's announced space, by addresses.

Announced space

Address share

Announced space

Types across the prefix

16,384 addresses
TypeAddressesShareRanges
Residential16,320>99%4
Business640.39%3

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
Origin network

AS3300

GB
Name
British Telecommunications Limited
Type
Internet provider
Registered
Oct 28, 1994
Domain
bt.net
Website
www.bt.net
Industry
Internet Service Provider (ISP)
Spamhaus ASN-DROP
not listed