204018 CITYFIBRE, GB
Adjacency: 1 Upstream: 1 Downstream: 0
Upstream Adjacent AS list
AS3356 LEVEL3 - Level 3 Parent, LLC, US
Rank AS Type Originate Addr Space (pfx) Transit Addr space (pfx) Description 70738 AS204018 ORIGIN Originate: 256 /24.00 Transit: 0 /0.00 CITYFIBRE, GB
Aggregation Suggestions
Filter: Aggregates, Specifics
This report does not take into account conditions local to each origin AS in terms of policy or traffic engineering requirements, so this is an approximate guideline as to aggregation possibilities.
Rank AS AS Name Current Wthdw Aggte Annce Redctn % 62759 AS204018 CITYFIBRE, GB 1 0 0 1 0 0.00% Prefix AS Path Aggregation Suggestion 156.67.240.0/24 4777 2497 3356 204018
Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.
AS204018 1 More Specifics 1 Total Advertisements CITYFIBRE, GB
156.67.240.0/24 156.67.240.0/20
whois: 402332
IANA has recorded AS204018 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS204018\n % This is the RIPE Database query service.
% The objects are in RPSL format.
%
% The RIPE Database is subject to Terms and Conditions.
% See https://docs.db.ripe.net/terms-conditions.html
% Note: this output has been filtered.
% Information related to 'AS203940 - AS205662'
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
% Information related to 'AS204018'
% Abuse contact for 'AS204018' is 'abuse@cityfibre.com'
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
created: 2015-09-14T13:56:04Z
last-modified: 2018-09-04T11:39:47Z
source: RIPE
organisation: ORG-CHL10-RIPE
org-name: Cityfibre Limited
country: GB
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: 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: 2020-12-16T13:30:26Z
source: RIPE # Filtered
role: CityFibre Netops
address: CityFibre Holdings Ltd 15 Bedford Street London WC2E 9HE UNITED KINGDOM
phone: +448452930774
nic-hdl: CFH10-RIPE
abuse-mailbox: abuse@cityfibre.com
mnt-by: MNT-CITYFIBRE
created: 2014-12-17T10:23:23Z
last-modified: 2014-12-17T10:23:23Z
source: RIPE # Filtered
%ERROR:201: access denied for 2401:2000:6660:0:0:0:0:13
%
% Queries from your IP address have passed the daily limit of controlled objects.
% Access from your host has been temporarily denied.
% For more information, see
% https://docs.db.ripe.net/FAQ/#why-did-i-receive-an-error-201-access-denied
% This query was served by the RIPE Database Query Service version 1.121.2 (DEXTER)