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 13 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
154.177.155.238 AS8452 TE-AS 4.58ms from Cairo, EG
156.223.3.62 AS8452 TE-AS 4.80ms from Cairo, EG
73.22.9.190 AS7922 Comcast Cable Communications, LLC 4.10ms from Chicago, US
52.117.148.222 AS36351 IBM Cloud 1.01ms from Dallas, US
91.192.5.206 AS203735 Net Tech Ltd 4.84ms from Erbil, IQ
195.99.22.238 AS2856 British Telecommunications PLC 1.08ms from Erith, GB
106.255.95.158 AS3786 LG DACOM Corporation 1.96ms from Incheon, KR
59.17.199.254 AS4766 Korea Telecom 0.91ms from Incheon, KR
109.184.218.78 AS12389 PJSC Rostelecom 6.49ms from Kazan, RU
35.177.72.190 AS16509 Amazon.com, Inc. 0.13ms from London, GB
90.60.232.62 AS3215 Orange S.A. 7.54ms from Marseille, FR
203.34.109.78 AS63850 QRHUB PTY LTD T/A Entrust ICT 1.68ms from Melbourne, AU
140.106.249.254 AS22639 Cooptel Coop de Telecommunication 4.88ms from Montreal, CA
60.142.163.254 AS17676 SoftBank Corp. 2.84ms from Osaka, JP
223.97.214.110 AS24444 Shandong Mobile Communication Company Limited 7.86ms from Qingdao, CN
132.248.60.254 AS278 Universidad Nacional Autonoma de Mexico 4.33ms from Santiago de Queretaro, MX
201.96.113.254 AS8151 UNINET 10.72ms from Santiago de Queretaro, MX
118.47.75.174 AS4766 Korea Telecom 7.20ms from Seoul, KR
52.221.165.126 AS16509 Amazon.com, Inc. 0.14ms from Singapore, SG
103.233.69.254 AS18046 DongFong Technology Co. Ltd. 1.57ms from Taipei, TW
124.218.153.254 AS9922 New Kaohsiung Broadband LTD. 5.04ms from Taipei, TW
23.227.189.30 AS29802 HIVELOCITY, Inc. 0.18ms from Ashburn, US
52.186.102.14 AS8075 Microsoft Corporation 0.40ms from Ashburn, US
121.20.145.78 AS4837 CHINA UNICOM China169 Backbone 14.76ms from Beijing, CN
31.17.207.254 AS3209 Vodafone GmbH 3.25ms from Berlin, DE

Traceroute

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

$
traceroute -a -n -q1 -f5 -m9 155.136.132.181
traceroute to 155.136.132.181 (155.136.132.181): 9 hops max, 52 byte packets
5 [AS32787] 2.21.120.152 30.587 ms
6 [AS32787] 95.100.253.232 209.757 ms
7 *
8 *
9 *
Measurement taken from IPinfo ProbeNet in Denpasar, ID
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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