AS Number
AS57653
AS Name
CTL-AS
Org Name
Central Technology Ltd
Country / Region
United Kingdom
Registry

ripe

RegDate

Updated

2025-04-24T14:15:44Z

AS57653 Looking Glass
IPv4Prefixes

6

IPv6Prefixes

1

IPv4 NUMs

4,352

IPv6 NUMs(/64)

4,294,967,296

CIDR Description IP Num
45.149.241.0/24
IRR InValid
Central Technology Ltd 256
93.123.74.0/23
IRR InValid
Central Technology Ltd 512
94.156.96.0/24
IRR Valid
Central Technology Ltd 256
94.156.186.0/24
IRR Valid
Central Technology Ltd 256
109.69.232.0/21
IRR InValid
Central Technology Ltd 2048
185.191.84.0/22
IRR InValid
Central Technology Ltd 1024
CIDR Description IP NUMs(prefix /64)
2a00:1ba8::/32
IRR Valid
Central Technology Ltd 4294967296
AS Description Country / Region IPv4 NUMs IPv6 NUMs IPv4 IPv6
AS6057 Administracion Nacional de Telecomunicaciones, UY Uruguay 2,155,520 68,719,476,736 IPv4 IPv4 IPv6 IPv6
AS7195 EDGEUNO S.A.S, CO Colombia 32,000 4,274,061,312 IPv4 IPv4 IPv6 IPv6
AS15412 FLAG-AS - Flag Telecom UK Limited, GB United Kingdom 34,048 4,294,967,296 IPv4 IPv4
AS174 COGENT-174 - Cogent Communications, LLC, US United States 36,211,200 215,834,689,537 IPv4 IPv4 IPv6 IPv6
AS3741 NTT-DATA-Inc - Dimension Data, ZA South Africa 2,962,944 137,439,084,544 IPv4 IPv4
AS5405 INTERDOTLINK - Inter.link GmbH, DE Germany 3,072 34,359,738,368 IPv4 IPv4 IPv6 IPv6
AS24482 SGGS-AS-AP - SG.GS, SG Singapore 20,992 4,294,967,296 IPv4 IPv4 IPv6 IPv6
AS9002 RETN-AS - RETN Limited, GB United Kingdom 26,880 4,831,903,744 IPv6 IPv6
AS7575 AARNET-AS-AP - Australian Academic and Research Network, AU Australia 1,154,816 90,194,444,288 IPv4 IPv4 IPv6 IPv6
AS30844 LIQUID-AS - Liquid Telecommunications Ltd, GB United Kingdom 371,200 38,654,705,664 IPv4 IPv4
AS39351 ESAB-AS - 31173 Services AB, SE Sweden 14,592 12,886,081,536 IPv4 IPv4
AS61573 IP TELECOM, BR Brazil 1,024 4,294,967,296 IPv4 IPv4 IPv6 IPv6
AS137409 GSLNETWORKS-AS-AP - GSL Networks Pty LTD, AU Australia 139,264 77,423,378,434 IPv4 IPv4 IPv6 IPv6
AS2914 NTT-DATA-2914 - NTT America, Inc., US United States 6,336,512 30,065,033,216 IPv4 IPv4 IPv6 IPv6
AS6204 ZET-NET - INTERKVM HOST SRL, RO Romania 3,072 268,500,999 IPv4 IPv4
AS6939 HURRICANE - Hurricane Electric LLC, US United States 455,680 283,043,982,540,800 IPv4 IPv4 IPv6 IPv6
AS37100 SEACOM-AS - SEACOM Limited, MU Mauritius 1,072,896 12,884,901,888 IPv4 IPv4 IPv6 IPv6
AS52075 WIFIRST - Wifirst S.A.S., FR France 132,352 34,359,738,368 IPv4 IPv4 IPv6 IPv6

Peers at this Exchange Point

Country / Region IX IPv4 IPv6 Port Speed Updated
United Kingdom LINX LON1 - London Internet Exchange Ltd. 195.66.227.61 2001:7f8:4::e135:1 20 Gbps 2025-10-09 08:50:23
United Kingdom LINX LON2 - London Internet Exchange Ltd. 195.66.239.61 2001:7f8:4:1::e135:1 20 Gbps 2025-10-09 08:50:23
United Kingdom LINX Manchester - LINX Manchester 195.66.244.102 2001:7f8:4:2::e135:1 10 Gbps 2025-10-21 08:02:57

Private Peering Facilities

Country / Region Name City Website Updated
as-block:       AS57370 - AS57973
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:        2025-04-24T14:15:44Z
last-modified:  2025-04-24T14:15:44Z
source:         RIPE



aut-num:        AS57653
as-name:        CTL-AS
org:            ORG-CTL23-RIPE
import:         from AS39326 accept ANY
import:         from AS31727 accept ANY
export:         to AS39326 announce AS57653
export:         to AS31727 announce AS57653
admin-c:        CB3871
tech-c:         CB3871
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         MNT-CTL
created:        2011-12-29T10:26:42Z
last-modified:  2017-11-15T12:23:33Z
source:         RIPE

organisation:   ORG-CTL23-RIPE
org-name:       Central Technology Ltd
country:        GB
reg-nr:         04579191
org-type:       LIR
address:        Quantum Point
                Sheepbridge Lane
address:        S41 9RX
address:        Chesterfield
address:        UNITED KINGDOM
phone:          +448454138888
fax-no:         +448454138877
e-mail:         chris.barr@centraltechnology.co.uk
mnt-ref:        RIPE-NCC-HM-MNT
mnt-ref:        MNT-CTL
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         MNT-CTL
abuse-c:        CTLA1-RIPE
created:        2009-10-14T12:25:19Z
last-modified:  2026-05-13T07:08:19Z
source:         RIPE

person:         Christopher Barr
address:        Central Technology Ltd, Quantum Point, Sheepbridge Lane, Chesterfield, Derbyshire, S41 9RX
phone:          +441246266130
e-mail:         noc@ct.uk
nic-hdl:        CB3871
mnt-by:         MNT-CTL
created:        2009-10-15T13:10:58Z
last-modified:  2024-02-02T15:07:18Z
source:         RIPE