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Data as of Nov 11, 2026

203.187.131.0/24

No anonymizer space · no proxy exits in 30 days

British Telecommunications Limited · space held by Infonet Services Corporation

Announcement
203.187.128.0/22
RPKI valid
Announced by
AS3300
Type
Residential
75% of it

Announcements

Less specific

Covering announcements

PrefixOriginTypeProxy exitsHolderRPKI
203.187.128.0/19
since Apr 2006
AS3300Residential3Infonet Services Corporation

Registrations in this block

The registry's network records over this block, widest first, each under its parent.

RangeAddressesNetnameHolderTypeCreatedAbuse contact
203.187.128.0/198,192INFONET-AP-02Infonet Services Corporation (ORG-ISC1-AP) · USALLOCATED PORTABLE—abuse@eu.bt.net
└ 203.187.131.0/24256BT-GIA-SGP-12unknownALLOCATED NON-PORTABLE—abuse@eu.bt.net
└ 203.187.131.128/298TRIUMPH-INTERNATIONAL-SERVICES-AGTriumph International Services AGASSIGNED NON-PORTABLE—ipaddman@bt.com
└ 203.187.131.136/298TD-BANK-FINANCIAL-GROUPunknownASSIGNED NON-PORTABLE—abuse@eu.bt.net
└ 203.187.131.144/2816TD-BANK-FINANCIAL-GROUPunknownASSIGNED NON-PORTABLE—abuse@eu.bt.net
└ 203.187.131.160/298VERITASVERITASASSIGNED NON-PORTABLE—abuse@eu.bt.net
└ 203.187.131.168/298VERITASVERITASASSIGNED NON-PORTABLE—abuse@eu.bt.net
└ 203.187.131.176/298VERITASVERITASASSIGNED NON-PORTABLE—abuse@eu.bt.net
└ 203.187.131.184/298VERITASVERITASALLOCATED NON-PORTABLE—abuse@eu.bt.net

Composition

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

Announced space

Address share

Announced space

Types across the prefix

256 addresses
TypeAddressesShareRanges
Residential19275%2
Business6425%7

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
Routing timeline

Covering aggregate above, the prefix's own history below

203.187.128.0/22

Routing history

Pattern
Stable
First seen
May 2021
Current origin since
May 2021 · 5.5 yr
Origin networks
1