Data as of Nov 4, 2026
155.136.146.0/24
No anonymizer space · no proxy exits in 30 daysNatwest Markets PLC · space held by NatWest
Announcement
this exact prefix
No RPKI
Announced by
Type
Business
Risk
30 / 100 · Medium
Recently moved
Recent change
New origin Jul 2026
from AS21054 Natwest Markets PLC
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Holder | RPKI |
|---|---|---|---|---|
| 155.136.128.0/17 since Jul 2017 | AS21054 | Business | NatWest | |
| 155.136.0.0/16 since Jun 2009 | AS21054 | Business | NatWest |
Network & registry
Origin network
AS21301
GB
- Name
- Natwest Markets PLC
- Type
- Business
- Registered
- Oct 24, 2001
- Domain
- natwestmarkets.com
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
latest 12 of 18 stints
Summary
Routing history
- Pattern
- Rotating
- First seen
- Jun 2018
- Current origin since
- Jul 2026 · 4 mo
- Origin networks
- 2
- Last change of origin
- Jul 2026
Recorded history
History
- Stints on record
- 18
- Handoffs
- 5
Whois
Registration for this announcement
- Range
- 155.
136. 0. 0/ 16 - Netname
- UK-NATWEST-155-136-0-0-16
- Registrant
- NatWest
- Registrant country
- GB
- Organization
- NatWest
- Org country
- GB
- Type
- LEGACY
- Created
- Not stated by the registry
- Updated
- Apr 10, 2026
- Maintainer
- RBSG-MNT
- RIR
- RIPE NCC
- Country
- GB
- Delegated
- Nov 8, 1991
- Status
- assigned