General Info








IP Addresses


United Kingdom

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Hosted Domains

There are 31 domain names hosted across 17 IP addresses on this ASN.

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Whois Details

as-block:       AS196608 - AS207259
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:        2016-09-08T07:26:53Z
last-modified:  2016-09-08T07:26:53Z
source:         RIPE

aut-num:        AS204018
as-name:        Cityfibre
org:            ORG-CHL10-RIPE
import:         from AS3356 accept ANY
export:         to AS3356 announce AS204018
import:         from AS174 accept ANY
export:         to AS174 announce AS204018
import:         from AS24931 accept ANY
export:         to AS24931 announce AS204018
import:         from AS19693 accept ANY
export:         to AS19693 announce AS204018
admin-c:        DT7249-RIPE
tech-c:         CFH10-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         MNT-CITYFIBRE
mnt-routes:     MNT-CITYFIBRE
created:        2015-09-14T13:56:04Z
last-modified:  2017-11-15T12:35:16Z
source:         RIPE

organisation:   ORG-CHL10-RIPE
org-name:       Cityfibre Limited
org-type:       LIR
address:        15 Bedford Street
address:        WC2E 9HE
address:        London
address:        UNITED KINGDOM
phone:          +448452930774
admin-c:        NAS84-RIPE
admin-c:        CP9568-RIPE
admin-c:        DT7249-RIPE
admin-c:        SB18846-RIPE
admin-c:        BC5792-RIPE
tech-c:         CFH10-RIPE
abuse-c:        CFH11-RIPE
mnt-ref:        RIPE-NCC-HM-MNT
mnt-ref:        MNT-CITYFIBRE
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         MNT-CITYFIBRE
created:        2014-12-10T09:18:33Z
last-modified:  2016-06-13T08:42:09Z
source:         RIPE

role:           CityFibre Netops
address:        CityFibre Holdings Ltd 15 Bedford Street London WC2E 9HE UNITED KINGDOM
phone:          +448452930774
nic-hdl:        CFH10-RIPE
mnt-by:         MNT-CITYFIBRE
created:        2014-12-17T10:23:23Z
last-modified:  2014-12-17T10:23:23Z
source:         RIPE

person:         David Tomalin
address:        CityFibre Holdings Ltd 15 Bedford Street London WC2E 9HE UNITED KINGDOM
phone:          +44 788 0506011
nic-hdl:        DT7249-RIPE
mnt-by:         MNT-CITYFIBRE
created:        2015-05-26T06:09:00Z
last-modified:  2015-05-26T06:09:00Z
source:         RIPE

IP Address Ranges

Netblock Description Num IPs hul-cust-uu-net 256 bri-cust-uu-net 256 lee-cust-uu-net 256 mk-cust-uu-net 256 PB-CUST-UN-NET-3 256 bra-cust-uu-net 256 NOR-CUST-UU-NET 256 REA-CUST-UU-NET 256 BRK-CUST-UU-NET 256 SLOUGH 256

There are no known IPv6 addresses belonging to this network

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Hosted Domains

There are 31 domain names hosted across 17 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP 6 5 4 2 2 1 1 1 1 1 1 1 1 1 1 1 1


There are 3 peers for this ASN.

Cogent Communications AS174
Pulsant Limited AS24931
Level 3 Parent, LLC AS3356

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Autonomous System Numbers (ASNs) are assigned to entities such as Internet Service Providers and other large organizations that control blocks of IP addresses. This network page, and the organization field that's shown on the main IP address information page and also returned in the geolocation API are based on the ASN.

The ASN details will often correspond to the IP address owner, but for smaller organizations it may be that organization's parent, or their ISP.

Find out more about AS204018 at robtex.

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