Autonomous System details

AS21054

Natwest Markets PLC  ·  natwestmarkets.com

United Kingdom

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AS21054 – Natwest Markets PLC

Field Value
Country United Kingdom
Website natwestmarkets.com
Hosted domains 56
IPv4 addresses 65,536
IPv6 addresses 0
ASN type Business
Registry ripe
Allocated 24 years ago on Mar 07, 2002
Updated 24 days ago on Apr 10, 2026

IP Ranges

Netblock Company Num of IPs
155.136.0.0/16 NatWest 65,536
155.136.0.0/17 NatWest 32,768
155.136.128.0/17 NatWest 32,768
155.136.60.0/22 NatWest 1,024
155.136.200.0/23 NatWest 512
155.136.202.0/23 NatWest 512
155.136.60.0/24 NatWest 256
155.136.61.0/24 NatWest 256
155.136.62.0/24 NatWest 256
155.136.63.0/24 NatWest 256
155.136.144.0/24 NatWest 256
155.136.146.0/24 NatWest 256
155.136.197.0/24 NatWest 256
155.136.202.0/24 NatWest 256
155.136.203.0/24 NatWest 256

There are no known IPv6 addresses belonging to this network

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WHOIS Details

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                                                ASHandle:       AS21054
                                                OrgID:          AS21054
                                                ASName:         AS21054
                                                ASNumber:       AS21054
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA
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Hosted Domains

There are 56 domain names hosted across 24 IP addresses on this ASN.

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IP Address Domain Domains on this IP
155.136.80.236 ██████████ 17
155.136.17.199 ██████████ 14
155.136.70.71 ██████████ 3
155.136.80.223 ██████████ 3
155.136.202.12 ██████████ 2
155.136.202.1 ██████████ 1
155.136.72.43 ██████████ 1
155.136.202.25 ██████████ 1
155.136.72.71 ██████████ 1
155.136.72.98 ██████████ 1

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Peers

There are 3 peers for this ASN.

Peers Name
AS1273 Vodafone Group PLC
AS2856 British Telecommunications PLC
AS32787 Akamai Technologies, Inc.
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Upstreams

There are 3 upstreams for this ASN.

upstreams Name
AS1273 Vodafone Group PLC
AS2856 British Telecommunications PLC
AS32787 Akamai Technologies, Inc.
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Downstreams

There are no downstreams for this ASN.

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ASN API & Database

Pingable IPs

No IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more.

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address ASN Details
89.36.154.110 AS203053 CLAUS WEB srl 0.69ms from Bucharest, RO
192.227.151.254 AS55286 B2 Net Solutions Inc. 0.25ms from Buffalo, US
130.61.215.238 AS31898 Oracle Corporation 0.18ms from Frankfurt am Main, DE
115.75.101.158 AS7552 Viettel Group 3.09ms from Ho Chi Minh City, VN
219.78.73.254 AS4760 HKT Limited 0.77ms from Hong Kong, HK
189.223.88.174 AS8151 UNINET 4.00ms from Los Angeles, US
64.229.162.14 AS577 Bell Canada 8.52ms from Montreal, CA
121.84.167.142 AS17511 OPTAGE Inc. 2.07ms from Osaka, JP
46.32.202.254 AS51407 Mada Al-Arab General Services Company 0.29ms from Ramallah, PS
50.209.90.190 AS7922 Comcast Cable Communications, LLC 7.18ms from San Jose, US
219.70.246.254 AS9416 Hoshin Multimedia Center Inc. 1.15ms from Taipei, TW
20.242.183.174 AS8075 Microsoft Corporation 0.42ms from Ashburn, US
34.214.82.14 AS16509 Amazon.com, Inc. 0.21ms from Boardman, US
67.22.61.174 AS64249 Charles River Operation 0.38ms from Boston, US
23.216.114.126 AS16625 Akamai Technologies, Inc. 0.06ms from Brisbane, AU
152.65.251.126 AS15169 Google LLC 0.17ms from Brussels, BE
155.232.32.30 AS2018 TENET (The UNINET Project) 1.76ms from Cape Town, ZA
175.152.221.206 AS4837 CHINA UNICOM China169 Backbone 3.28ms from Chengdu, CN
166.159.245.254 AS6167 Verizon Business 18.57ms from Chicago, US
84.159.57.94 AS3320 Deutsche Telekom AG 3.58ms from Frankfurt am Main, DE
223.92.49.30 AS9808 China Mobile Communications Group Co., Ltd. 8.36ms from Hangzhou, CN
37.219.6.142 AS16086 DNA Oyj 7.34ms from Helsinki, FI
46.203.176.254 AS2914 NTT America, Inc. 1.02ms from Hong Kong, HK
122.43.88.126 AS17858 LG POWERCOMM 1.95ms from Incheon, KR
192.247.31.254 AS64204 TETRA TECH, INC. 4.59ms from Los Angeles, US

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this ASN. Learn more.

$
traceroute -a -n -q1 -f5 -m12 155.136.19.5
traceroute to 155.136.19.5 (155.136.19.5): 12 hops max, 52 byte packets
5 [AS32787] 23.57.110.33 1.335 ms
6 [AS32787] 72.52.20.72 81.438 ms
7 *
8 *
9 [AS21054] 155.136.12.14 86.133 ms
10 *
11 *
12 *
Measurement taken from IPinfo ProbeNet in New York City, US
On

Related Networks

What is an ASN?

Autonomous System Numbers (ASNs) are assigned to entities such as Internet Service Providers and other large organizations that control blocks of IP addresses. This network page, and the organization field that's shown on the main IP address information page and also returned in the geolocation API are based on the ASN.

The ASN details will often correspond to the IP address owner, but for smaller organizations it may be that organization's parent, or their ISP. Find out more about AS21054 at robtex.

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