Data as of Nov 3, 2026
155.136.0.0/16
No anonymizer space · no proxy exits in 30 daysNatwest Markets PLC · space held by NatWest
Announcements
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
| Prefix | Origin | Type | Holder | RPKI |
|---|---|---|---|---|
| 155.136.0.0/17 since Jul 2017 | AS21054 | Business | NatWest | |
| 155.136.56.0/22 since Jan 2017 | AS21301 | Business | NatWest | |
| 155.136.56.0/24 since May 2017 | AS21301 | Business | NatWest | |
| 155.136.57.0/24 since May 2017 | AS21301 | Business | NatWest | |
| 155.136.58.0/24 since May 2017 | AS21301 | Business | NatWest | |
| 155.136.59.0/24 since May 2017 | AS21301 | Business | NatWest | |
| 155.136.60.0/22 since Feb 2017 | AS21054 | Business | NatWest | |
| 155.136.60.0/24 since May 2017 | AS21054 | Business | NatWest | |
| 155.136.61.0/24 since May 2017 | AS21054 | Business | NatWest | |
| 155.136.62.0/24 since May 2017 | AS21054 | Business | NatWest | |
| 155.136.63.0/24 since May 2017 | AS21054 | Business | NatWest | |
| 155.136.128.0/17 since Jul 2017 | AS21054 | Business | NatWest | |
| 155.136.144.0/24 since Jul 2026 | AS21301 | Business | NatWest | |
| 155.136.146.0/24 since Jul 2026 | AS21301 | Business | NatWest | |
| 155.136.151.0/24 since Jul 2020 | AS21301 | Business | NatWest | |
| 155.136.197.0/24 since Jun 2020 | AS21054 | Business | NatWest | |
| 155.136.198.0/23 since Nov 2020 | AS61231 | Unknown | NatWest | |
| 155.136.200.0/23 since Jun 2018 | AS21301 | Business | NatWest | |
| 155.136.200.0/24 since Jun 2018 | AS21301 | Business | NatWest | |
| 155.136.201.0/24 since Jun 2018 | AS21301 | Business | NatWest | |
| 155.136.202.0/23 since Mar 2025 | AS21301 | Business | NatWest | |
| 155.136.202.0/24 since Jun 2018 | AS21054 | Business | NatWest | |
| 155.136.203.0/24 since Jun 2018 | AS21054 | Business | NatWest | |
| 155.136.224.0/22 since Nov 2020 | AS61231 | Unknown | NatWest | |
| 155.136.230.0/23 since Nov 2020 | AS61231 | Unknown | NatWest | |
| 155.136.232.0/23 since Nov 2020 | AS61231 | Unknown | NatWest |
Composition
The types across the prefix's announced space, by addresses.
Announced space
Address share
Announced space
Types across the prefix
65,536 addresses
| Type | Addresses | Share | Ranges | |
|---|---|---|---|---|
| Business | 62,976 | 96% | 25 | |
| Unknown | 2,560 | 3.9% | 4 |
Network & registry
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
Routing timeline
Who has announced this prefix
Summary
Routing history
- Pattern
- Stable
- First seen
- May 2005
- Current origin since
- Jun 2009 · 17 yr
- Origin networks
- 2
- Last change of origin
- Jun 2009
Recorded history
History
- Handoffs
- 1
- Also announced by
- 21301
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS21054 | RIPE | Royal Bank of Scotland | RBSG-MNT | Sep 19, 2016 |
| AS21054 | RADB | Prolexic Technologies, Inc. | MAINT-AS32787 | Nov 13, 2023 |
| AS21301 not the origin | RADB | Akamai Technologies, Inc. | MAINT-AS32787 | Aug 31, 2026 |
| AS21301 not the origin | RIPE | RBSG-MNT | Sep 9, 2026 | |
| AS32787 not the origin | RIPE | Royal Bank of Scotland | MNT-PROLE RBSG-MNT | Mar 25, 2011 |
| AS32787 not the origin | RADB | Akamai via EMIX | MAINT-AS8966 | Nov 13, 2023 |
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