155.136.151.0/24

AS21301 · Natwest Markets PLC

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Summary

Country	United Kingdom
Domain	natwest.com
ASN	AS21301
Parent Range	155.136.0.0/16
Registry	RIPE
ID	UK-NATWEST-155-136-0-0-16

WHOIS Details

inetnum:        155.136.0.0 - 155.136.255.255
netname:        UK-NATWEST-155-136-0-0-16
descr:          NatWest
country:        GB
admin-c:        CL5041-RIPE
tech-c:         RTST1-RIPE
status:         LEGACY
mnt-by:         RBSG-MNT
created:        1970-01-01T00:00:00Z
last-modified:  2026-04-10T15:23:02Z
source:         RIPE

role:           Technical Role
address:        250 Bishopsgate
address:        London
address:        EC2M 3UR
e-mail:         ripe-tech@rbs.com
abuse-mailbox:  ripe-abuse@rbs.com
nic-hdl:        RTST1-RIPE
mnt-by:         RBSG-MNT
created:        2018-03-23T12:27:34Z
last-modified:  2026-04-10T15:08:40Z
source:         RIPE

person:         Sean Jarvis
address:        250 Bishopsgate
address:        London
address:        EC2M 3UR
phone:          +44 7972 792793
e-mail:         sean.jarvis@natwest.com
nic-hdl:        CL5041-RIPE
mnt-by:         RBSG-MNT
created:        2012-08-13T13:30:01Z
last-modified:  2026-04-10T14:49:33Z
source:         RIPE

route:          155.136.0.0/16
descr:          Royal Bank of Scotland
origin:         AS21054
mnt-by:         RBSG-MNT
mnt-routes:     AS5564-MNT
mnt-routes:     RBSG-MNT
mnt-routes:     MNT-PROLE
created:        2009-04-07T12:30:12Z
last-modified:  2016-09-19T12:56:41Z
source:         RIPE

route:          155.136.0.0/16
descr:          Royal Bank of Scotland
origin:         AS32787
mnt-by:         MNT-PROLE
mnt-by:         RBSG-MNT
notify:         hostmaster@prolexic.com
created:        2009-06-30T15:10:46Z
last-modified:  2011-03-25T10:05:43Z
source:         RIPE

Overlapping Ranges

BGP prefixes that contain 155.136.151.0/24

Range	ASN	Company	Num of IPs
155.136.0.0/16	AS21054	NatWest	65,536
155.136.0.0/16	AS21301	NatWest	65,536
155.136.0.0/16	AS61231	NatWest	65,536

Nearby Ranges

BGP prefixes that overlap with 155.136.0.0/16

Range	ASN	Company	Num of IPs
155.136.0.0/16	AS21054	NatWest	65,536
155.136.0.0/16	AS21301	NatWest	65,536
155.136.0.0/16	AS61231	NatWest	65,536

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

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Useful for Cybersecurity

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Pingable IPs

No IPs in this range 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
141.161.239.120	AS11318 Georgetown University	`2.21ms` from Ashburn, US
181.97.105.88	AS7303 Telecom Argentina S.A.	`5.13ms` from Asuncion, PY
91.235.165.200	AS57815 Netergy Expert Sistems SRL	`4.28ms` from Bucharest, RO
3.21.125.152	AS16509 Amazon.com, Inc.	`0.97ms` from Columbus, US
52.142.112.40	AS8075 Microsoft Corporation	`0.15ms` from Dublin, IE
35.156.15.40	AS16509 Amazon.com, Inc.	`0.32ms` from Frankfurt am Main, DE
83.252.140.216	AS1257 Tele2 Sverige AB	`10.02ms` from Goeteborg, SE
176.38.37.200	AS39608 Lanet Network Ltd	`0.55ms` from Kyiv, UA
68.207.169.152	AS33363 Charter Communications, Inc	`14.05ms` from Murfreesboro, US
108.212.66.200	AS7018 AT&T Enterprises, LLC	`17.34ms` from San Jose, US
222.111.131.72	AS4766 Korea Telecom	`1.33ms` from Seoul, KR
211.252.9.104	AS4766 Korea Telecom	`1.70ms` from Seoul, KR
210.100.238.168	AS4766 Korea Telecom	`1.80ms` from Seoul, KR
183.191.125.152	AS4837 CHINA UNICOM China169 Backbone	`2.80ms` from Taiyuan, CN
43.155.123.200	AS132203 Tencent Building, Kejizhongyi Avenue	`4.17ms` from Hong Kong, HK
4.213.164.40	AS8075 Microsoft Corporation	`0.15ms` from Lohogaon, IN
62.49.239.216	AS5378 Vodafone Limited	`7.04ms` from London, GB
169.231.202.24	AS131 University of California, Santa Barbara	`3.68ms` from Los Angeles, US
113.14.223.56	AS4134 CHINANET BACKBONE	`0.47ms` from Nanning, CN
119.162.252.8	AS4837 CHINA UNICOM China169 Backbone	`6.91ms` from Qingdao, CN
185.47.97.72	AS202339 SINET SRL	`6.88ms` from Rome, IT
119.210.229.168	AS4766 Korea Telecom	`5.89ms` from Seoul, KR
3.113.167.88	AS16509 Amazon.com, Inc.	`0.27ms` from Tokyo, JP
216.67.80.8	AS7782 Alaska Communications Systems Group, Inc.	`0.94ms` from Anchorage, US
173.93.65.200	AS11426 Charter Communications Inc	`15.82ms` from Ashburn, US

Traceroute

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

traceroute -a -n -q1 -f3 -m8 155.136.151.69

traceroute to 155.136.151.69 (155.136.151.69): 8 hops max, 52 byte packets

3 [] 5.57.81.220 10.378 ms

4 [AS32787] 104.86.67.83 10.421 ms

5 [AS32787] 209.200.182.180 23.033 ms

6 *

7 *

8 *

Measurement taken from

IPinfo ProbeNet in Edinburgh, GB

On April 13th 2026

What are IP address ranges?

IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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