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 9 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

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

IP Address ASN Details
155.136.60.41 AS21054 Natwest Markets PLC 10.73ms from Erith, GB
155.136.23.200 AS21054 Natwest Markets PLC 13.33ms from London, GB
155.136.154.9 AS21054 Natwest Markets PLC 12.71ms from London, GB
155.136.202.59 AS21054 Natwest Markets PLC 10.50ms from London, GB
155.136.197.69 AS21054 Natwest Markets PLC 10.47ms from Erith, GB
155.136.203.251 AS21054 Natwest Markets PLC 10.52ms from Erith, GB
155.136.62.17 AS21054 Natwest Markets PLC 10.69ms from Erith, GB
155.136.17.40 AS21054 Natwest Markets PLC 13.43ms from London, GB
155.136.153.154 AS21054 Natwest Markets PLC 12.65ms from London, GB
155.136.22.136 AS21054 Natwest Markets PLC 13.18ms 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
54.184.88.238 AS16509 Amazon.com, Inc. 0.16ms from Boardman, US
190.104.211.254 AS11014 CPS 0.94ms from Buenos Aires, AR
54.75.24.46 AS16509 Amazon.com, Inc. 0.19ms from Dublin, IE
202.82.115.30 AS4515 PCCW IMS Ltd (PCCW Business Internet Access) 1.35ms from Hong Kong, HK
218.102.90.254 AS4760 HKT Limited 0.76ms from Hong Kong, HK
135.196.7.46 AS3257 GTT Communications Inc. 5.90ms from London, GB
3.96.31.14 AS16509 Amazon.com, Inc. 0.14ms from Montreal, CA
42.125.101.126 AS10010 TOKAI Communications Corporation 6.99ms from Osaka, JP
191.180.24.174 AS28573 Claro NXT Telecomunicacoes Ltda 4.79ms from Osasco, BR
63.225.198.158 AS209 CenturyLink Communications, LLC 1.74ms from Phoenix, US
5.240.63.206 AS1257 Tele2 Sverige AB 12.74ms from Riga, LV
54.36.47.62 AS16276 OVH SAS 0.10ms from Roubaix, FR
144.38.45.62 AS210 Utah Education Network 7.20ms from Salt Lake City, US
37.112.171.254 AS51035 JSC ER-Telecom Holding 7.72ms from Samara, RU
14.68.13.254 AS4766 Korea Telecom 1.58ms from Seoul, KR
185.188.216.30 AS206358 Qendrim Kryeziu trading as N.P.SH "ISP - Broadcast 2.52ms from Skopje, MK
13.237.176.158 AS16509 Amazon.com, Inc. 0.13ms from Sydney, AU
61.62.107.254 AS18182 Sony Network Taiwan Limited 1.30ms from Taipei, TW
131.130.179.254 AS760 Vienna University Computer Center 0.89ms from Vienna, AT
139.216.243.46 AS9443 Vocus Retail 2.00ms from Adelaide, AU
190.120.61.78 AS27927 Coop. Popular de Elec., Obras y Servicios Pub. de Santa Rosa LTDA 13.80ms from Buenos Aires, AR
73.26.235.190 AS7922 Comcast Cable Communications, LLC 9.20ms from Denver, US
83.21.101.14 AS5617 Orange Polska Spolka Akcyjna 4.29ms from Gdansk, PL
115.75.101.158 AS7552 Viettel Group 3.07ms from Ho Chi Minh City, VN
113.28.236.222 AS4515 PCCW IMS Ltd (PCCW Business Internet Access) 1.42ms from Hong Kong, HK

Traceroute

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

$
traceroute -a -n -q1 -m5 155.136.169.33
traceroute to 155.136.169.33 (155.136.169.33): 5 hops max, 52 byte packets
1 [AS31898] 140.91.242.2 0.062 ms
3 *
4 *
5 *
Measurement taken from IPinfo ProbeNet in Abu Dhabi, AE
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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