
13205 BTWWIDC-H Autonomous System, GB
Adjacency: 2 Upstream: 2 Downstream: 0
Upstream Adjacent AS list
AS5400 BT, GB
AS2856 BT-UK-AS BTnet UK Regional network, GB
Rank AS Type Originate Addr Space (pfx) Transit Addr space (pfx) Description 6694 AS13205 ORIGIN Originate: 20992 /17.64 Transit: 0 /0.00 BTWWIDC-H Autonomous System, 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 % 4900 AS13205 BTWWIDC-H Autonomous System, GB 16 10 0 6 10 62.50% Prefix AS Path Aggregation Suggestion 31.11.56.0/23 4777 2497 5400 13205 78.109.0.0/20 4777 2497 5400 13205 78.109.0.0/24 4777 2497 5400 13205 - Withdrawn - matching aggregate 78.109.0.0/20 4777 2497 5400 13205 78.109.5.0/24 4777 2497 5400 13205 - Withdrawn - matching aggregate 78.109.0.0/20 4777 2497 5400 13205 78.109.6.0/24 4777 2497 5400 13205 - Withdrawn - matching aggregate 78.109.0.0/20 4777 2497 5400 13205 78.109.7.0/24 4777 2497 5400 13205 - Withdrawn - matching aggregate 78.109.0.0/20 4777 2497 5400 13205 78.109.9.0/24 4777 2497 5400 13205 - Withdrawn - matching aggregate 78.109.0.0/20 4777 2497 5400 13205 78.109.10.0/24 4777 2497 5400 13205 - Withdrawn - matching aggregate 78.109.0.0/20 4777 2497 5400 13205 78.109.11.0/24 4777 2497 5400 13205 - Withdrawn - matching aggregate 78.109.0.0/20 4777 2497 5400 13205 137.213.239.0/24 4777 2497 5400 2856 13205 137.213.252.0/23 4777 2497 5400 2856 13205 217.140.0.0/20 4777 2497 5400 13205 217.140.12.0/22 4777 2497 5400 13205 - Withdrawn - matching aggregate 217.140.0.0/20 4777 2497 5400 13205 217.140.12.0/24 4777 2497 5400 13205 - Withdrawn - matching aggregate 217.140.0.0/20 4777 2497 5400 13205 217.140.13.0/24 4777 2497 5400 13205 - Withdrawn - matching aggregate 217.140.0.0/20 4777 2497 5400 13205 217.140.32.0/19 4777 2497 5400 2856 13205
Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.
AS13205 13 More Specifics 16 Total Advertisements BTWWIDC-H Autonomous System, GB
31.11.56.0/23 31.11.56.0/21
78.109.0.0/24 78.109.0.0/20
78.109.5.0/24 78.109.0.0/20
78.109.6.0/24 78.109.0.0/20
78.109.7.0/24 78.109.0.0/20
78.109.9.0/24 78.109.0.0/20
78.109.10.0/24 78.109.0.0/20
78.109.11.0/24 78.109.0.0/20
137.213.239.0/24 137.213.0.0/16
137.213.252.0/23 137.213.0.0/16
217.140.12.0/22 217.140.0.0/20
217.140.12.0/24 217.140.0.0/20
217.140.13.0/24 217.140.0.0/20
whois: 402332
IANA has recorded AS13205 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS13205\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 'AS12557 - AS13223'
as-block: AS12557 - AS13223
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: 2018-11-22T15:27:24Z
last-modified: 2018-11-22T15:27:24Z
source: RIPE
% Information related to 'AS13205'
% Abuse contact for 'AS13205' is 'protect@bt.com'
aut-num: AS13205
as-name: UNSPECIFIED
descr: BTWWIDC-H Autonomous System
descr: BT Global Services DCS WorldWide Internet Data Centre
descr: Amsterdam
org: ORG-BT4-RIPE
import: from AS5400 action pref=100; accept ANY
import: from AS2855 action pref=90; accept ANY
import: from AS9335 action pref=100; accept ANY
import: from AS4295 action pref=100; accept ANY
import: from AS12541 action pref=100; accept ANY
export: to AS5400 announce AS13205
export: to AS2855 announce AS13205
export: to AS9335 announce AS13205
export: to AS4295 announce AS13205
export: to AS12541 announce AS13205
default: to AS2855 action pref=90; networks ANY
admin-c: ICHR1-RIPE
tech-c: ICHR1-RIPE
status: ASSIGNED
mnt-by: RIPE-NCC-END-MNT
mnt-by: ICH-MNT
created: 1970-01-01T00:00:00Z
last-modified: 2017-11-15T09:15:51Z
source: RIPE
organisation: ORG-BT4-RIPE
org-name: British Telecommunications PLC
country: GB
org-type: LIR
address: pp HWJ380, PO Box 78961
1 Braham Street
address: E1W 9TD
address: London
address: UNITED KINGDOM
phone: +44 3316 260934
admin-c: BTCR1-RIPE
admin-c: MS35380-RIPE
mnt-ref: BTENT-MNT
mnt-ref: RIPE-NCC-HM-MNT
mnt-by: RIPE-NCC-HM-MNT
mnt-by: BTENT-MNT
abuse-c: BTCR3-RIPE
created: 2004-04-17T12:11:54Z
last-modified: 2025-06-19T11:44:33Z
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 (SHETLAND)