AS Number
AS21054
AS Name
UK-NATWEST-AS21054
Org Name
Natwest Markets PLC
Registry

ripe

RegDate

Updated

2018-11-22T15:27:27Z

AS21054 Looking Glass
IPv4Prefixes

13

IPv6Prefixes

0

IPv4 NUMs

65,536

IPv6 NUMs(/64)

0

65,536 IPv4 Addresses
CIDR Description IP Num
155.136.0.0/17
IRR Parent Valid
ROY-SCOT-NET 32768
155.136.0.0/16
IRR Valid
ROY-SCOT-NET 65536
155.136.60.0/24
IRR Valid
ROY-SCOT-NET 256
155.136.60.0/22
IRR InValid
ROY-SCOT-NET 1024
155.136.61.0/24
IRR Valid
ROY-SCOT-NET 256
155.136.62.0/24
IRR Valid
ROY-SCOT-NET 256
155.136.63.0/24
IRR Valid
ROY-SCOT-NET 256
155.136.128.0/17
IRR Parent Valid
ROY-SCOT-NET 32768
155.136.197.0/24
IRR Valid
ROY-SCOT-NET 256
155.136.200.0/23
IRR InValid
ROY-SCOT-NET 512
155.136.202.0/24
IRR Valid
ROY-SCOT-NET 256
155.136.202.0/23
IRR InValid
ROY-SCOT-NET 512
155.136.203.0/24
IRR Valid
ROY-SCOT-NET 256
AS Description Country/Region IPv4 NUMs IPv6 NUMs IPv4 IPv6
AS32787 PROLEXIC-TECHNOLOGIES-DDOS-MITIGATION-NETWORK - Akamai Technologies, Inc., US United States 91,904 5,963,776 IPv4 IPv4
AS1273 CW - Vodafone Group PLC, GB United Kingdom 1,812,736 8,796,093,022,208 IPv4 IPv4
AS2856 BT-UK-AS - British Telecommunications PLC, GB United Kingdom 13,803,520 584,115,814,400 IPv4 IPv4
as-block:       AS21004 - AS21151
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:        2018-11-22T15:27:27Z
last-modified:  2018-11-22T15:27:27Z
source:         RIPE



aut-num:        AS21054
as-name:        UK-NATWEST-AS21054
org:            ORG-TRBO2-RIPE
descr:          Edinburgh
import:         from AS2856 action pref=100; accept ANY
import:         from AS1273 action pref=100; accept ANY
import:         from AS32787 action pref=100; accept ANY
import:         from AS4755 action pref=100; accept ANY
import:         from AS9498 action pref=100; accept ANY
export:         to AS2856 announce AS21054
export:         to AS1273 announce AS21054
export:         to AS32787 announce AS21054
export:         to AS4755 announce AS21054
export:         to AS9498 announce AS21054
default:        to AS1273 action pref=100; networks ANY
admin-c:        CL5041-RIPE
tech-c:         RTST1-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         RBSG-MNT
created:        2002-03-07T14:53:40Z
last-modified:  2026-04-10T15:39:43Z
source:         RIPE

organisation:   ORG-TRBO2-RIPE
org-name:       Natwest Markets PLC
country:        GB
org-type:       LIR
address:        250 Bishopsgate
address:        EC2M 3UR
address:        London
address:        UNITED KINGDOM
phone:          +447929792793
abuse-c:        AR17872-RIPE
mnt-ref:        RBSG-MNT
mnt-ref:        RIPE-NCC-HM-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         RBSG-MNT
created:        2013-06-12T10:43:32Z
last-modified:  2022-06-23T07:41:36Z
source:         RIPE
e-mail:         sean.jarvis@natwest.com

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