Autonomous System details

AS21301

Natwest Markets PLC  ·  natwestmarkets.com

United Kingdom

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AS21301 – Natwest Markets PLC

Field Value
Country United Kingdom
Website natwestmarkets.com
Hosted domains 5
IPv4 addresses 2,304
IPv6 addresses 0
ASN type Business
Registry ripe
Allocated 24 years ago on Oct 24, 2001
Updated 5 days ago on Apr 10, 2026

IP Ranges

Netblock Company Num of IPs
155.136.56.0/22 NatWest 1,024
155.136.200.0/23 NatWest 512
155.136.202.0/23 NatWest 512
155.136.56.0/24 NatWest 256
155.136.57.0/24 NatWest 256
155.136.58.0/24 NatWest 256
155.136.59.0/24 NatWest 256
155.136.151.0/24 NatWest 256
155.136.200.0/24 NatWest 256
155.136.201.0/24 NatWest 256

There are no known IPv6 addresses belonging to this network

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WHOIS Details

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                                                ASHandle:       AS21301
                                                OrgID:          AS21301
                                                ASName:         AS21301
                                                ASNumber:       AS21301
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA
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Hosted Domains

There are 5 domain names hosted across 7 IP addresses on this ASN.

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IP Address Domain Domains on this IP
155.136.200.12 ██████████ 2
155.136.200.59 ██████████ 1
155.136.200.25 ██████████ 1
155.136.200.1 ██████████ 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

5 IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
155.136.200.16 AS21301 Natwest Markets PLC 12.32ms from London, GB
155.136.151.73 AS21301 Natwest Markets PLC 12.31ms from London, GB
155.136.58.9 AS21301 Natwest Markets PLC 12.12ms from London, GB
155.136.56.43 AS21301 Natwest Markets PLC 12.26ms from London, GB
155.136.201.152 AS21301 Natwest Markets PLC 12.32ms from London, GB

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
129.125.72.5 AS1103 SURF B.V. 4.35ms from Amsterdam, NL
31.20.222.53 AS50266 Odido Netherlands B.V. 2.75ms from Amsterdam, NL
73.46.116.181 AS7922 Comcast Cable Communications, LLC 5.86ms from Boca Raton, US
47.3.21.165 AS19115 Charter Communications LLC 1.01ms from Charlotte, US
223.30.23.165 AS9583 Sify Limited 1.88ms from Chennai, IN
65.195.10.181 AS701 Verizon Business 0.61ms from Dallas, US
170.23.28.85 AS7979 Servers.com, Inc. 0.17ms from Dallas, US
103.23.237.53 AS45433 Kappa Internet Services Private Limited 17.88ms from Delhi, IN
35.158.250.53 AS16509 Amazon.com, Inc. 0.16ms from Frankfurt am Main, DE
129.173.49.165 AS8111 Dalhousie University 0.32ms from Halifax, CA
212.149.221.69 AS16086 DNA Oyj 4.13ms from Helsinki, FI
84.249.143.85 AS1759 Telia Finland Oyj 1.06ms from Helsinki, FI
178.94.181.133 AS399073 BUNNY TECHNOLOGY LLC 0.72ms from Los Angeles, US
213.56.172.245 AS3215 Orange S.A. 3.04ms from Lyon, FR
93.62.27.69 AS12874 Fastweb SpA 4.44ms from Milan, IT
47.49.42.133 AS20115 Charter Communications LLC 9.10ms from Minneapolis, US
109.63.218.181 AS12714 PJSC MegaFon 1.90ms from Moscow, RU
146.185.209.101 AS47764 LLC VK 0.78ms from Moscow, RU
217.255.209.245 AS3320 Deutsche Telekom AG 4.69ms from Munich, DE
5.49.249.213 AS5410 Bouygues Telecom SA 8.84ms from Paris, FR
209.73.152.117 AS18779 EGIHosting 0.17ms from Santa Clara, US
126.88.214.133 AS17676 SoftBank Corp. 2.75ms from Tokyo, JP
41.230.86.149 AS37705 TOPNET 1.34ms from Tunis, TN
193.126.238.149 AS1897 NOS COMUNICACOES, S.A. 0.38ms from Braga, PT
95.105.134.197 AS15962 Orange Slovensko a.s. 6.47ms from Bratislava, SK

Traceroute

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

$
traceroute -a -n -q1 -f4 155.136.151.65
traceroute to 155.136.151.65 (155.136.151.65): 64 hops max, 52 byte packets
4 [AS32787] 2.21.124.115 1.965 ms
5 [AS32787] 72.52.52.190 14.982 ms
6 *
7 *
8 *
Measurement taken from IPinfo ProbeNet in London, GB
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 AS21301 at robtex.

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