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Data as of Nov 4, 2026

155.136.128.0/17

No anonymizer space · no proxy exits in 30 days

Natwest Markets PLC · space held by NatWest

Announcement
this exact prefix
No RPKI
Announced by
AS21054
Type
Business
92% of it

Announcements

Less specific

Covering announcements

PrefixOriginTypeHolderRPKI
155.136.0.0/16
since Jun 2009
AS21054BusinessNatWest
Nesting

More-specifics by size

Sized by addresses, colored by each announcement's type. Click a tile with children to zoom in, a leaf to open it.
More specific

Announcements inside

PrefixOriginTypeHolderRPKI
155.136.144.0/24
since Jul 2026
AS21301BusinessNatWest
155.136.146.0/24
since Jul 2026
AS21301BusinessNatWest
155.136.151.0/24
since Jul 2020
AS21301BusinessNatWest
155.136.197.0/24
since Jun 2020
AS21054BusinessNatWest
155.136.198.0/23
since Nov 2020
AS61231UnknownNatWest
155.136.200.0/23
since Jun 2018
AS21301BusinessNatWest
155.136.200.0/24
since Jun 2018
AS21301BusinessNatWest
155.136.201.0/24
since Jun 2018
AS21301BusinessNatWest
155.136.202.0/23
since Mar 2025
AS21301BusinessNatWest
155.136.202.0/24
since Jun 2018
AS21054BusinessNatWest
155.136.203.0/24
since Jun 2018
AS21054BusinessNatWest
155.136.224.0/22
since Nov 2020
AS61231UnknownNatWest
155.136.230.0/23
since Nov 2020
AS61231UnknownNatWest
155.136.232.0/23
since Nov 2020
AS61231UnknownNatWest

Composition

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

Announced space

Address share

Announced space

Types across the prefix

32,768 addresses
TypeAddressesShareRanges
Business30,20892%15
Unknown2,5607.8%4

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
Origin network

AS21054

GB
Name
Natwest Markets PLC
Type
Business
Registered
Aug 8, 2001
Domain
natwestmarkets.com
Industry
Internet Service Provider (ISP)
Spamhaus ASN-DROP
not listed