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
141.163.121.254 AS216071 SERVERS TECH FZCO 0.78ms from Amsterdam, NL
68.93.138.190 AS7018 AT&T Enterprises, LLC 10.59ms from Atlanta, US
216.33.76.254 AS3561 CenturyLink Communications, LLC 1.66ms from Chicago, US
86.163.31.174 AS2856 British Telecommunications PLC 9.99ms from Erith, GB
18.199.37.30 AS16509 Amazon.com, Inc. 0.31ms from Frankfurt am Main, DE
84.159.57.94 AS3320 Deutsche Telekom AG 3.58ms from Frankfurt am Main, DE
77.21.152.254 AS3209 Vodafone GmbH 6.58ms from Hamburg, DE
125.139.232.158 AS4766 Korea Telecom 5.86ms from Incheon, KR
197.184.42.126 AS37105 RAIN GROUP HOLDINGS (PTY) LTD 14.33ms from Johannesburg, ZA
90.25.207.222 AS3215 Orange S.A. 1.87ms from Paris, FR
166.145.1.222 AS6167 Verizon Business 15.19ms from Philadelphia, US
193.86.86.254 AS13036 T-Mobile Czech Republic a.s. 0.69ms from Prague, CZ
112.231.132.254 AS4837 CHINA UNICOM China169 Backbone 6.55ms from Qingdao, CN
167.88.112.142 AS3842 InMotion Hosting, Inc. 0.13ms from Seattle, US
209.121.50.254 AS852 TELUS Communications Inc. 4.55ms from Seattle, US
13.124.120.62 AS16509 Amazon.com, Inc. 0.34ms from Seoul, KR
220.72.58.94 AS4766 Korea Telecom 1.48ms from Seoul, KR
211.193.234.126 AS4766 Korea Telecom 3.26ms from Seoul, KR
118.25.82.174 AS45090 Shenzhen Tencent Computer Systems Company Limited 1.11ms from Shanghai, CN
103.135.118.238 AS150288 METAGE TECHNOLOGY PTE. LTD. 0.45ms from Taipei, TW
222.156.21.110 AS7482 Asia Pacific On-line Service Inc. 5.47ms from Taipei, TW
167.179.97.206 AS20473 The Constant Company, LLC 0.18ms from Tokyo, JP
75.197.36.46 AS6167 Verizon Business 16.78ms from Atlanta, US
34.208.133.174 AS16509 Amazon.com, Inc. 0.18ms from Boardman, US
54.184.88.238 AS16509 Amazon.com, Inc. 0.15ms from Boardman, US

Traceroute

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

$
traceroute -a -n -q1 -m10 155.136.13.181
traceroute to 155.136.13.181 (155.136.13.181): 10 hops max, 52 byte packets
2 *
3 [AS32787] 2.21.120.57 1.021 ms
4 [AS32787] 72.52.20.72 167.17 ms
5 *
6 *
7 [AS21054] 155.136.12.14 171.536 ms
8 *
9 *
10 *
Measurement taken from IPinfo ProbeNet in Singapore, SG
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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