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 2,816
IPv6 addresses 0
ASN type Business
Registry ripe
Allocated 25 years ago on Oct 24, 2001
Updated 20 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
155.136.144.0/24 NatWest 256
155.136.146.0/24 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
155.136.200.1 ██████████ 1
155.136.200.59 ██████████ 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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ASN API & Database

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
179.50.89.53 AS26619 GTD COLOMBIA S.A.S 0.76ms from Bogota, CO
76.157.131.197 AS7922 Comcast Cable Communications, LLC 5.55ms from Chicago, US
87.73.75.181 AS15516 DKTV A/S 6.07ms from Copenhagen, DK
76.102.227.101 AS7922 Comcast Cable Communications, LLC 6.82ms from Fremont, US
221.4.251.165 AS17816 China Unicom IP network China169 Guangdong province 8.38ms from Guangzhou, CN
47.56.125.133 AS45102 Alibaba (US) Technology Co., Ltd. 0.93ms from Hong Kong, HK
82.15.142.197 AS5089 Virgin Media Limited 9.06ms from Maidenhead, GB
204.186.232.149 AS3737 PenTeleData Inc. 4.17ms from New York City, US
69.122.70.85 AS6128 Cablevision Systems Corp. 6.42ms from Newark, US
89.188.32.117 AS40981 University of Montenegro 0.83ms from Podgorica, ME
44.211.178.133 AS14618 Amazon.com, Inc. 0.39ms from Reston, US
54.242.85.165 AS14618 Amazon.com, Inc. 0.50ms from Reston, US
20.226.61.229 AS8075 Microsoft Corporation 0.14ms from Sao Paulo, BR
51.210.159.21 AS16276 OVH SAS 0.09ms from Strasbourg, FR
139.177.150.5 AS401398 Poly-Gamma LLC 0.16ms from Tokyo, JP
163.44.84.5 AS7506 GMO Internet Group, Inc. 0.61ms from Tokyo, JP
61.53.186.101 AS4837 CHINA UNICOM China169 Backbone 5.46ms from Zhengzhou, CN
185.153.231.197 AS60721 Bursabil Teknoloji A.S. 0.04ms from Bursa, TR
159.253.91.53 AS42903 Itm8 A/S 0.96ms from Copenhagen, DK
3.255.187.101 AS16509 Amazon.com, Inc. 0.20ms from Dublin, IE
188.111.157.5 AS3209 Vodafone GmbH 0.95ms from Duesseldorf, DE
116.105.50.165 AS7552 Viettel Group 17.88ms from Ho Chi Minh City, VN
8.217.47.229 AS45102 Alibaba (US) Technology Co., Ltd. 0.77ms from Hong Kong, HK
175.226.224.21 AS4766 Korea Telecom 1.87ms from Incheon, KR
1.230.237.133 AS9318 SK Broadband Co Ltd 0.78ms from Incheon, KR

Traceroute

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

$
traceroute -a -n -q1 -f5 155.136.200.10
traceroute to 155.136.200.10 (155.136.200.10): 64 hops max, 52 byte packets
5 [AS32787] 72.52.52.190 14.694 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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