155.136.56.0/24

AS21301 · Natwest Markets PLC

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Summary

Country	United Kingdom
Domain	rbs.co.uk
ASN	AS21301
Parent Range	155.136.0.0/16
Registry	RIPE
ID	ROY-SCOT-NET

WHOIS Details

inetnum:        155.136.0.0 - 155.136.255.255
netname:        ROY-SCOT-NET
descr:          Royal Bank of Scotland
country:        GB
admin-c:        CL5041-RIPE
tech-c:         Rd5168-RIPE
status:         LEGACY
mnt-by:         RBSG-MNT
created:        1970-01-01T00:00:00Z
last-modified:  2019-12-04T13:11:18Z
source:         RIPE

person:         Sean Jarvis
address:        42 Islington High Street
address:        London
address:        N1 8XL
phone:          +44 20 7063 1687
e-mail:         sean.jarvis@rbs.com
nic-hdl:        CL5041-RIPE
mnt-by:         RBSG-MNT
created:        2012-08-13T13:30:01Z
last-modified:  2016-09-19T12:39:19Z
source:         RIPE

person:         RBS dnsmaster
address:        42 Islington High Street
address:        London
address:        N1 8XL
phone:          +44 20 7615 9759
e-mail:         domains@rbs.co.uk
nic-hdl:        Rd5168-RIPE
mnt-by:         RBSG-MNT
created:        2012-08-13T13:33:33Z
last-modified:  2018-05-18T13:05:01Z
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 155.136.56.0/24

Range	ASN	Company	Num of IPs
155.136.0.0/16	AS21054	Royal Bank of Scotland	65,536
155.136.0.0/16	AS21301	Royal Bank of Scotland	65,536
155.136.0.0/16	AS61231	Royal Bank of Scotland	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	Royal Bank of Scotland	65,536
155.136.0.0/16	AS21301	Royal Bank of Scotland	65,536
155.136.0.0/16	AS61231	Royal Bank of Scotland	65,536

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

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Useful for Cybersecurity

Read more

Pingable IPs

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

IP Address	ASN	Details
155.136.56.40	AS21301 Natwest Markets PLC	`12.47ms` 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
52.43.204.232	AS16509 Amazon.com, Inc.	`0.13ms` from Boardman, US
76.24.134.152	AS7922 Comcast Cable Communications, LLC	`8.81ms` from Boston, US
65.188.62.56	AS11426 Charter Communications Inc	`8.06ms` from Charlotte, US
66.32.87.56	AS7029 Windstream Communications LLC	`8.89ms` from Chicago, US
13.79.56.248	AS8075 Microsoft Corporation	`0.21ms` from Dublin, IE
91.20.110.200	AS3320 Deutsche Telekom AG	`6.88ms` from Frankfurt am Main, DE
194.103.61.8	AS1257 Tele2 Sverige AB	`0.84ms` from Goeteborg, SE
31.209.136.200	AS51896 Hringdu ehf	`0.66ms` from Hafnarfjoerdur, IS
142.118.30.136	AS577 Bell Canada	`1.44ms` from Montreal, CA
36.27.25.88	AS4134 CHINANET-BACKBONE	`4.65ms` from Ningbo, CN
72.208.213.168	AS22773 Cox Communications Inc.	`5.17ms` from Phoenix, US
3.238.181.184	AS14618 Amazon.com, Inc.	`0.35ms` from Reston, US
3.232.233.88	AS14618 Amazon.com, Inc.	`0.18ms` from Reston, US
76.135.77.248	AS7922 Comcast Cable Communications, LLC	`7.84ms` from Seattle, US
119.215.104.168	AS4766 Korea Telecom	`1.44ms` from Seoul, KR
101.227.40.8	AS4811 China Telecom (Group)	`1.77ms` from Shanghai, CN
89.160.69.88	AS29518 Bredband2 AB	`3.47ms` from Stockholm, SE
180.150.64.72	AS4764 Aussie Broadband	`1.00ms` from Sydney, AU
83.7.226.200	AS5617 Orange Polska Spolka Akcyjna	`8.15ms` from Warsaw, PL
211.100.232.168	AS17964 Beijing Dian-Xin-Tong Network Technologies Co., Ltd.	`3.61ms` from Beijing, CN
117.11.119.104	AS4837 CHINA UNICOM China169 Backbone	`4.93ms` from Beijing, CN
35.81.57.168	AS16509 Amazon.com, Inc.	`0.17ms` from Boardman, US
128.85.240.88	AS8075 Microsoft Corporation	`0.21ms` from Boydton, US
41.143.149.88	AS36903 Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM	`11.36ms` from Casablanca, MA
118.124.69.120	AS4134 CHINANET-BACKBONE	`13.10ms` from Chengdu, CN

Traceroute

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

traceroute -a -n -q1 -f3 155.136.56.42

traceroute to 155.136.56.42 (155.136.56.42): 64 hops max, 52 byte packets

3 [AS36236] 185.40.232.31 0.443 ms

4 [] 195.66.224.31 1.193 ms

5 [AS32787] 2.21.124.41 1.02 ms

6 [AS32787] 72.52.52.190 14.706 ms

7 *

8 *

9 *

10 [AS21301] 155.136.56.42 14.742 ms

Measurement taken from

IPinfo ProbeNet in London, GB

On January 19th 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.

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