AS Number
AS21301
AS Name
UK-NATWEST-AS21301
Org Name
Natwest Markets PLC
Registry

ripe

RegDate

Updated

2018-11-22T15:27:28Z

AS21301 Looking Glass
IPv4Prefixes

12

IPv6Prefixes

0

IPv4 NUMs

2,816

IPv6 NUMs(/64)

0

2,816 IPv4 Addresses
CIDR Description IP Num
155.136.56.0/24
IRR Valid
ROY-SCOT-NET 256
155.136.56.0/22
IRR InValid
ROY-SCOT-NET 1024
155.136.57.0/24
IRR Valid
ROY-SCOT-NET 256
155.136.58.0/24
IRR Valid
ROY-SCOT-NET 256
155.136.59.0/24
IRR Valid
ROY-SCOT-NET 256
155.136.144.0/24
IRR Valid
ROY-SCOT-NET 256
155.136.146.0/24
IRR Valid
ROY-SCOT-NET 256
155.136.151.0/24
IRR Valid
ROY-SCOT-NET 256
155.136.200.0/24
IRR Valid
ROY-SCOT-NET 256
155.136.200.0/23
IRR InValid
ROY-SCOT-NET 512
155.136.201.0/24
IRR Valid
ROY-SCOT-NET 256
155.136.202.0/23
IRR InValid
ROY-SCOT-NET 512
AS Description Country/Region IPv4 NUMs IPv6 NUMs IPv4 IPv6
AS2856 BT-UK-AS - British Telecommunications PLC, GB United Kingdom 13,842,432 584,115,814,400 IPv4 IPv4
AS32787 PROLEXIC-TECHNOLOGIES-DDOS-MITIGATION-NETWORK - Akamai Technologies, Inc., US United States 92,672 5,177,344 IPv4 IPv4
AS1273 CW - Vodafone Group PLC, GB United Kingdom 1,816,832 8,796,094,070,784 IPv4 IPv4
as-block:       AS21281 - AS21390
descr:          RIPE NCC ASN block
remarks:        These AS Numbers are assigned to network operators in the RIPE NCC service region.
mnt-by:         RIPE-NCC-HM-MNT
created:        2018-11-22T15:27:28Z
last-modified:  2018-11-22T15:27:28Z
source:         RIPE



aut-num:        AS21301
as-name:        UK-NATWEST-AS21301
descr:          EDINBURGH
org:            ORG-TRBo1-RIPE
import:         from AS1273 action pref=100; accept ANY
import:         from AS32787 action pref=100; accept ANY
import:         from AS2856 action pref=100; accept ANY
export:         to AS1273 announce AS21301
export:         to AS32787 announce AS21301
export:         to AS2856 announce AS21301
tech-c:         RTST1-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
admin-c:        CL5041-RIPE
mnt-by:         RBSG-MNT
created:        2001-10-24T12:23:55Z
last-modified:  2026-04-10T15:50:30Z
source:         RIPE
sponsoring-org: ORG-UA24-RIPE

organisation:   ORG-TRBO1-RIPE
org-name:       Natwest Markets PLC
country:        GB
reg-nr:         Not Applicable
org-type:       OTHER
address:        135 Bishopsgate London EC2M 3UR UK
e-mail:         david.j.lane@rbs.com
abuse-c:        AR30109-RIPE
phone:          +44 20 3361 7879
mnt-ref:        AS1849-MNT
mnt-by:         AS1849-MNT
created:        2009-12-18T13:54:36Z
last-modified:  2026-05-13T06:45:20Z
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