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 20 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
155.136.197.0/24 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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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
68.93.138.190 AS7018 AT&T Enterprises, LLC 10.59ms from Atlanta, US
31.17.207.254 AS3209 Vodafone GmbH 4.02ms from Berlin, DE
75.69.226.14 AS7922 Comcast Cable Communications, LLC 6.24ms from Boston, US
41.141.213.94 AS36903 Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM 5.04ms from Casablanca, MA
174.29.97.94 AS209 CenturyLink Communications, LLC 1.96ms from Denver, US
87.159.89.254 AS3320 Deutsche Telekom AG 8.69ms from Frankfurt am Main, DE
1.36.173.254 AS4760 HKT Limited 0.83ms from Hong Kong, HK
183.165.183.238 AS4134 CHINANET BACKBONE 10.12ms from Huainan, CN
144.196.65.254 AS13445 Cisco Webex LLC 0.45ms from London, GB
142.234.159.254 AS395954 Leaseweb USA, Inc. 0.25ms from Los Angeles, US
159.138.194.78 AS136907 HUAWEI CLOUDS 1.33ms from Moscow, RU
74.71.250.14 AS12271 Charter Communications Inc 3.91ms from New York City, US
46.32.202.254 AS51407 Mada Al-Arab General Services Company 0.29ms from Ramallah, PS
107.141.110.206 AS7018 AT&T Enterprises, LLC 6.53ms from San Jose, US
211.229.80.254 AS4766 Korea Telecom 4.72ms from Seoul, KR
3.104.248.174 AS16509 Amazon.com, Inc. 0.18ms from Sydney, AU
42.239.19.14 AS4837 CHINA UNICOM China169 Backbone 6.84ms from Zhengzhou, CN
27.254.195.158 AS4750 CS LOXINFO PUBLIC COMPANY LIMITED 0.55ms from Bangkok, TH
52.25.185.62 AS16509 Amazon.com, Inc. 0.20ms from Boardman, US
50.194.102.158 AS7922 Comcast Cable Communications, LLC 6.11ms from Chicago, US
103.138.171.62 AS139029 AKNetworks 1.77ms from Dhaka, BD
37.219.6.142 AS16086 DNA Oyj 7.34ms from Helsinki, FI
211.220.197.126 AS4766 Korea Telecom 5.99ms from Incheon, KR
115.133.175.126 AS4788 TM TECHNOLOGY SERVICES SDN. BHD. 1.90ms from Kuala Lumpur, MY
184.100.76.254 AS19901 Brightspeed 2.80ms from Minneapolis, 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 -m10 155.136.39.16
traceroute to 155.136.39.16 (155.136.39.16): 10 hops max, 52 byte packets
5 [] 195.66.224.31 102.188 ms
6 [AS32787] 2.21.124.49 102.011 ms
7 [AS32787] 95.100.253.232 135.993 ms
8 *
9 *
10 *
Measurement taken from IPinfo ProbeNet in Accra, GH
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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