AS Number
AS205394
AS Name
CSLDUAL-AS
Org Name
CSL (DualCom) Limited
Country / Region
United Kingdom
Registry

ripe

RegDate

Updated

2026-03-05T15:29:31Z

AS205394 Looking Glass
IPv4Prefixes

18

IPv6Prefixes

6

IPv4 NUMs

5,632

IPv6 NUMs(/64)

34,359,738,368

CIDR Description IP Num
46.226.72.0/21
IRR InValid
CSL (DualCom) Limited 2048
46.226.73.0/24
IRR Valid
Emizon Networks Limited 256
46.226.74.0/24
IRR Valid
Emizon Networks Limited 256
139.28.100.0/24
IRR Valid
CSL (DualCom) Limited 256
139.28.100.0/22
IRR InValid
CSL (DualCom) Limited 1024
139.28.101.0/24
IRR Valid
CSL (DualCom) Limited 256
139.28.103.0/24
IRR Valid
CSL (DualCom) Limited 256
185.176.124.0/24
IRR Valid
CSL (DualCom) Limited 256
185.176.124.0/22
IRR InValid
CSL (DualCom) Limited 1024
185.180.172.0/24
IRR Valid
CSL (DualCom) Limited 256
185.180.172.0/23
IRR InValid
IQIP-INFRA 512
185.180.173.0/24
IRR Valid
CSL (DualCom) Limited 256
185.201.164.0/24
IRR Valid
CSL (DualCom) Limited 256
185.201.164.0/22
IRR InValid
CSL (DualCom) Limited 1024
185.201.165.0/24
IRR Valid
CSL (DualCom) Limited 256
185.201.166.0/24
IRR Valid
CSL (DualCom) Limited 256
185.201.166.0/23
IRR InValid
CSL (DualCom) Limited 512
185.201.167.0/24
IRR Valid
CSL (DualCom) Limited 256
CIDR Description IP NUMs(prefix /64)
2a0a:c840::/29
IRR InValid
CSL (DualCom) Limited 34359738368
2a0a:c841::/32
IRR Valid
CSL (DualCom) Limited 4294967296
2a0a:c844::/32
IRR Valid
CSL (DualCom) Limited 4294967296
2a0a:c845::/32
IRR Valid
CSL (DualCom) Limited 4294967296
2a0a:c846::/32
IRR Valid
CSL (DualCom) Limited 4294967296
2a0a:c847::/32
IRR Valid
CSL (DualCom) Limited 4294967296
AS Description Country / Region IPv4 NUMs IPv6 NUMs IPv4 IPv6
AS1299 TWELVE99 - Arelion Sweden AB, SE Sweden 411,392 77,326,778,368 IPv4 IPv4
AS9002 RETN-AS - RETN Limited, GB United Kingdom 26,624 4,831,838,208 IPv4 IPv4
AS25180 EXPONENTIAL-E-AS - Exponential-E Ltd., GB United Kingdom 291,072 38,923,141,120 IPv4 IPv4 IPv6 IPv6
AS174 COGENT-174 - Cogent Communications, LLC, US United States 36,233,472 215,834,689,537 IPv4 IPv4 IPv6 IPv6
AS3257 GTT-BACKBONE - GTT Communications Inc., US United States 8,552,448 442,382,745,600 IPv4 IPv4
AS6461 ZAYO-6461 - Zayo Bandwidth, US United States 1,751,552 51,808,436,224 IPv4 IPv4 IPv6 IPv6
AS6939 HURRICANE - Hurricane Electric LLC, US United States 458,496 283,043,982,606,336 IPv4 IPv4 IPv6 IPv6
AS44356 EPSILON - Epsilon Telecommunications Ltd, GB United Kingdom 8,448 12,884,901,888 IPv4 IPv4 IPv6 IPv6
AS198949 Radware - Radware Ltd, IL Israel 116,480 17,448,894,464 IPv4 IPv4
AS Description Country / Region IPv4 NUMs IPv6 NUMs IPv4 IPv6
AS42009 AVR-AS - AVR Group Limited, GB United Kingdom 3,072 4,294,967,296 IPv4 IPv4

Whois Record

as-block AS203940 - AS205662

as-block
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
2026-03-05T15:29:31Z
last-modified
2026-03-05T15:29:31Z
source
RIPE

aut-num AS205394

aut-num
as-name
CSLDUAL-AS
org
ORG-CL404-RIPE
import
from AS44356 accept ANY
from AS25180 accept ANY
from AS6939 accept ANY
from AS8928 accept ANY
from AS6461 accept ANY
from AS174 accept ANY
from AS41495 accept ANY
export
to AS44356 announce AS-CSLDUAL
to AS25180 announce AS-CSLDUAL
to AS6939 announce AS-CSLDUAL
to AS8928 announce AS-CSLDUAL
to AS6461 announce AS-CSLDUAL
to AS174 announce AS-CSLDUAL
to AS41495 announce AS-CSLDUAL
admin-c
CDN110-RIPE
PP16243-RIPE
tech-c
PP16243-RIPE
HFLX-RIPE
status
ASSIGNED
mnt-by
RIPE-NCC-END-MNT
uk-csldualcom-1-mnt
created
2017-09-06T14:29:59Z
last-modified
2024-06-04T10:27:03Z
source
RIPE

organisation ORG-CL404-RIPE

organisation
ORG-CL404-RIPE
org-name
CSL (DualCom) Limited
country
GB
reg-nr
03155883
org-type
LIR
address
Building 4, Croxley Park, Hatters Lane,
WD18 8YF
Harefield
UNITED KINGDOM
phone
+44 1895 474474
e-mail
pritesh.patel@csldual.com
admin-c
PP16243-RIPE
SC19281-RIPE
tech-c
PP16243-RIPE
SC19281-RIPE
abuse-c
AR40119-RIPE
mnt-ref
uk-csldualcom-1-mnt
mnt-by
RIPE-NCC-HM-MNT
uk-csldualcom-1-mnt
created
2017-05-01T09:01:30Z
last-modified
2026-05-13T07:38:10Z
source
RIPE

role CSL DualCom NOC

role
CSL DualCom NOC
address
Salamander Quay West, Park Lane, Harefield, Middlesex, UB9 6NZ, United Kingdom
e-mail
hostmaster@csldual.com
nic-hdl
CDN110-RIPE
mnt-by
uk-csldualcom-1-mnt
created
2018-01-29T13:49:05Z
last-modified
2018-04-05T10:04:50Z
source
RIPE

role Faelix Limited Hostmasters

role
Faelix Limited Hostmasters
address
Faelix Limited, M21 9WR, UK
e-mail
hostmaster@faelix.net
admin-c
MFLX-RIPE
tech-c
MFLX-RIPE
nic-hdl
HFLX-RIPE
mnt-by
MNT-FAELIX
created
2007-03-07T18:28:03Z
last-modified
2008-01-04T11:04:20Z
source
RIPE

person Pritesh Patel

person
Pritesh Patel
address
Salamander Quay West, Park Lane
UB9 6NZ
Harefield
UNITED KINGDOM
phone
+44 1895 474474
nic-hdl
PP16243-RIPE
mnt-by
uk-csldualcom-1-mnt
created
2017-05-01T09:01:29Z
last-modified
2017-05-01T09:01:30Z
source
RIPE

as-block:       AS203940 - AS205662
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:        2026-03-05T15:29:31Z
last-modified:  2026-03-05T15:29:31Z
source:         RIPE



aut-num:        AS205394
as-name:        CSLDUAL-AS
org:            ORG-CL404-RIPE
import:         from AS44356 accept ANY
export:         to AS44356 announce AS-CSLDUAL
import:         from AS25180 accept ANY
export:         to AS25180 announce AS-CSLDUAL
import:         from AS6939 accept ANY
export:         to AS6939 announce AS-CSLDUAL
import:         from AS8928 accept ANY
export:         to AS8928 announce AS-CSLDUAL
import:         from AS6461 accept ANY
export:         to AS6461 announce AS-CSLDUAL
import:         from AS174 accept ANY
export:         to AS174 announce AS-CSLDUAL
import:         from AS41495 accept ANY
export:         to AS41495 announce AS-CSLDUAL
admin-c:        CDN110-RIPE
admin-c:        PP16243-RIPE
tech-c:         PP16243-RIPE
tech-c:         HFLX-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         uk-csldualcom-1-mnt
created:        2017-09-06T14:29:59Z
last-modified:  2024-06-04T10:27:03Z
source:         RIPE

organisation:   ORG-CL404-RIPE
org-name:       CSL (DualCom) Limited
country:        GB
reg-nr:         03155883
org-type:       LIR
address:        Building 4, Croxley Park, Hatters Lane,
address:        WD18 8YF
address:        Harefield
address:        UNITED KINGDOM
phone:          +44 1895 474474
e-mail:         pritesh.patel@csldual.com
admin-c:        PP16243-RIPE
admin-c:        SC19281-RIPE
tech-c:         PP16243-RIPE
tech-c:         SC19281-RIPE
abuse-c:        AR40119-RIPE
mnt-ref:        uk-csldualcom-1-mnt
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         uk-csldualcom-1-mnt
created:        2017-05-01T09:01:30Z
last-modified:  2026-05-13T07:38:10Z
source:         RIPE

role:           CSL DualCom NOC
address:        Salamander Quay West, Park Lane, Harefield, Middlesex, UB9 6NZ, United Kingdom
e-mail:         hostmaster@csldual.com
nic-hdl:        CDN110-RIPE
mnt-by:         uk-csldualcom-1-mnt
created:        2018-01-29T13:49:05Z
last-modified:  2018-04-05T10:04:50Z
source:         RIPE

role:           Faelix Limited Hostmasters
address:        Faelix Limited, M21 9WR, UK
e-mail:         hostmaster@faelix.net
admin-c:        MFLX-RIPE
tech-c:         MFLX-RIPE
nic-hdl:        HFLX-RIPE
mnt-by:         MNT-FAELIX
created:        2007-03-07T18:28:03Z
last-modified:  2008-01-04T11:04:20Z
source:         RIPE

person:         Pritesh Patel
address:        Salamander Quay West, Park Lane
address:        UB9 6NZ
address:        Harefield
address:        UNITED KINGDOM
phone:          +44 1895 474474
nic-hdl:        PP16243-RIPE
mnt-by:         uk-csldualcom-1-mnt
created:        2017-05-01T09:01:29Z
last-modified:  2017-05-01T09:01:30Z
source:         RIPE