15404 COLT Technology Services Group, GB
Adjacency: 4 Upstream: 3 Downstream: 1
Upstream Adjacent AS list
AS21070 TOTALENERGIES, FR
AS1419 SELERITY, US
AS8220 COLT COLT Technology Services Group Limited, GB
Downstream Adjacent AS list
AS21070 TOTALENERGIES, FR
Rank AS Type Originate Addr Space (pfx) Transit Addr space (pfx) Description 1636 AS15404 ORG+TRN Originate: 147456 /14.83 Transit: 256 /24.00 COLT Technology Services Group, 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 % 1940 AS15404 COLT Technology Services Group, GB 151 43 13 121 30 19.87% Prefix AS Path Aggregation Suggestion 5.11.96.0/20 37100 8220 15404 5.182.152.0/24 37100 8220 15404 38.65.18.0/24 2914 174 1419 15404 45.129.69.0/24 37100 8220 15404 46.28.212.0/24 37100 8220 15404 62.85.160.0/19 2152 8220 15404 62.182.250.0/24 37100 8220 15404 77.74.158.0/23 37100 8220 15404 85.208.193.0/24 37100 8220 15404 91.209.87.0/24 37100 8220 15404 91.212.245.0/24 37100 8220 15404 91.213.65.0/24 6939 8220 15404 91.213.68.0/24 37100 8220 15404 91.213.91.0/24 37100 8220 15404 91.213.110.0/24 37100 8220 15404 91.238.4.0/24 37100 8220 15404 91.244.125.0/24 6939 8220 15404 103.80.220.0/23 2914 8220 15404 + Announce - aggregate of 103.80.220.0/24 (2914 8220 15404) and 103.80.221.0/24 (2914 8220 15404) 103.80.220.0/24 2914 8220 15404 - Withdrawn - aggregated with 103.80.221.0/24 (2914 8220 15404) 103.80.221.0/24 2914 8220 15404 - Withdrawn - aggregated with 103.80.220.0/24 (2914 8220 15404) 109.107.145.0/24 6939 8220 15404 129.35.17.0/24 37100 8220 15404 129.35.20.0/23 37100 8220 15404 129.35.85.0/24 37100 8220 15404 139.138.235.0/24 6939 8220 15404 141.98.45.0/24 37100 8220 15404 148.188.0.0/20 37100 8220 15404 148.188.192.0/20 37100 8220 15404 148.188.224.0/22 37100 8220 15404 148.188.232.0/21 37100 8220 15404 155.137.0.0/22 37100 8220 15404 + Announce - aggregate of 155.137.0.0/23 (37100 8220 15404) and 155.137.2.0/23 (37100 8220 15404) 155.137.0.0/24 37100 8220 15404 - Withdrawn - aggregated with 155.137.1.0/24 (37100 8220 15404) 155.137.1.0/24 37100 8220 15404 - Withdrawn - aggregated with 155.137.0.0/24 (37100 8220 15404) 155.137.2.0/24 37100 8220 15404 - Withdrawn - aggregated with 155.137.3.0/24 (37100 8220 15404) 155.137.3.0/24 37100 8220 15404 - Withdrawn - aggregated with 155.137.2.0/24 (37100 8220 15404) 155.137.7.0/24 37100 8220 15404 156.118.0.0/24 37100 8220 15404 156.118.6.0/24 37100 8220 15404 156.118.8.0/24 6939 8220 15404 157.239.128.0/23 6939 8220 15404 + Announce - aggregate of 157.239.128.0/24 (6939 8220 15404) and 157.239.129.0/24 (6939 8220 15404) 157.239.128.0/24 6939 8220 15404 - Withdrawn - aggregated with 157.239.129.0/24 (6939 8220 15404) 157.239.129.0/24 6939 8220 15404 - Withdrawn - aggregated with 157.239.128.0/24 (6939 8220 15404) 158.156.155.0/24 37100 8220 15404 158.156.162.0/24 37100 8220 15404 158.156.172.0/24 37100 8220 15404 158.156.182.0/24 37100 8220 15404 158.156.193.0/24 37100 8220 15404 161.17.0.0/16 37100 8220 15404 161.17.0.0/24 37100 8220 15404 - Withdrawn - matching aggregate 161.17.0.0/16 37100 8220 15404 163.199.254.0/24 6939 8220 15404 170.200.251.0/24 37100 8220 15404 170.200.252.0/23 37100 8220 15404 + Announce - aggregate of 170.200.252.0/24 (37100 8220 15404) and 170.200.253.0/24 (37100 8220 15404) 170.200.252.0/24 37100 8220 15404 - Withdrawn - aggregated with 170.200.253.0/24 (37100 8220 15404) 170.200.253.0/24 37100 8220 15404 - Withdrawn - aggregated with 170.200.252.0/24 (37100 8220 15404) 170.248.142.0/24 6939 8220 15404 170.251.108.0/24 6939 8220 15404 170.252.84.0/23 6939 8220 15404 + Announce - aggregate of 170.252.84.0/24 (6939 8220 15404) and 170.252.85.0/24 (6939 8220 15404) 170.252.84.0/24 6939 8220 15404 - Withdrawn - aggregated with 170.252.85.0/24 (6939 8220 15404) 170.252.85.0/24 6939 8220 15404 - Withdrawn - aggregated with 170.252.84.0/24 (6939 8220 15404) 170.252.86.0/24 6939 8220 15404 176.119.201.0/24 37100 8220 15404 178.249.200.0/21 37100 8220 15404 185.13.62.0/24 37100 8220 15404 185.60.76.0/23 37100 8220 15404 185.60.79.0/24 37100 8220 15404 185.134.140.0/24 37100 8220 15404 185.140.104.0/24 37100 8220 15404 185.154.148.0/23 37100 8220 15404 185.199.204.0/24 37100 8220 15404 185.203.232.0/24 37100 8220 15404 185.212.156.0/22 37100 8220 15404 185.213.216.0/23 37100 8220 15404 + Announce - aggregate of 185.213.216.0/24 (37100 8220 15404) and 185.213.217.0/24 (37100 8220 15404) 185.213.216.0/24 37100 8220 15404 - Withdrawn - aggregated with 185.213.217.0/24 (37100 8220 15404) 185.213.217.0/24 37100 8220 15404 - Withdrawn - aggregated with 185.213.216.0/24 (37100 8220 15404) 185.218.120.0/22 37100 8220 15404 + Announce - aggregate of 185.218.120.0/23 (37100 8220 15404) and 185.218.122.0/23 (37100 8220 15404) 185.218.120.0/24 37100 8220 15404 - Withdrawn - aggregated with 185.218.121.0/24 (37100 8220 15404) 185.218.121.0/24 37100 8220 15404 - Withdrawn - aggregated with 185.218.120.0/24 (37100 8220 15404) 185.218.122.0/24 37100 8220 15404 - Withdrawn - aggregated with 185.218.123.0/24 (37100 8220 15404) 185.218.123.0/24 37100 8220 15404 - Withdrawn - aggregated with 185.218.122.0/24 (37100 8220 15404) 185.226.224.0/24 37100 8220 15404 185.234.136.0/24 37100 8220 15404 188.64.17.0/24 37100 8220 15404 188.64.18.0/23 37100 8220 15404 + Announce - aggregate of 188.64.18.0/24 (37100 8220 15404) and 188.64.19.0/24 (37100 8220 15404) 188.64.18.0/24 37100 8220 15404 - Withdrawn - aggregated with 188.64.19.0/24 (37100 8220 15404) 188.64.19.0/24 37100 8220 15404 - Withdrawn - aggregated with 188.64.18.0/24 (37100 8220 15404) 192.31.22.0/24 37100 8220 15404 192.76.161.0/24 37100 8220 15404 192.109.222.0/24 37100 8220 15404 192.166.107.0/24 37100 8220 15404 192.228.1.0/24 37100 8220 15404 192.228.2.0/23 37100 8220 15404 + Announce - aggregate of 192.228.2.0/24 (37100 8220 15404) and 192.228.3.0/24 (37100 8220 15404) 192.228.2.0/24 37100 8220 15404 - Withdrawn - aggregated with 192.228.3.0/24 (37100 8220 15404) 192.228.3.0/24 37100 8220 15404 - Withdrawn - aggregated with 192.228.2.0/24 (37100 8220 15404) 192.232.64.0/24 37100 8220 15404 192.232.66.0/24 37100 8220 15404 193.8.64.0/22 37100 8220 15404 193.26.246.0/23 37100 8220 15404 + Announce - aggregate of 193.26.246.0/24 (37100 8220 15404) and 193.26.247.0/24 (37100 8220 15404) 193.26.246.0/24 37100 8220 15404 - Withdrawn - aggregated with 193.26.247.0/24 (37100 8220 15404) 193.26.247.0/24 37100 8220 15404 - Withdrawn - aggregated with 193.26.246.0/24 (37100 8220 15404) 193.26.248.0/21 37100 8220 15404 + Announce - aggregate of 193.26.248.0/22 (37100 8220 15404) and 193.26.252.0/22 (37100 8220 15404) 193.26.248.0/24 37100 8220 15404 - Withdrawn - aggregated with 193.26.249.0/24 (37100 8220 15404) 193.26.249.0/24 37100 8220 15404 - Withdrawn - aggregated with 193.26.248.0/24 (37100 8220 15404) 193.26.250.0/24 37100 8220 15404 - Withdrawn - aggregated with 193.26.251.0/24 (37100 8220 15404) 193.26.251.0/24 37100 8220 15404 - Withdrawn - aggregated with 193.26.250.0/24 (37100 8220 15404) 193.26.252.0/24 37100 8220 15404 - Withdrawn - aggregated with 193.26.253.0/24 (37100 8220 15404) 193.26.253.0/24 37100 8220 15404 - Withdrawn - aggregated with 193.26.252.0/24 (37100 8220 15404) 193.26.254.0/24 37100 8220 15404 - Withdrawn - aggregated with 193.26.255.0/24 (37100 8220 15404) 193.26.255.0/24 37100 8220 15404 - Withdrawn - aggregated with 193.26.254.0/24 (37100 8220 15404) 193.28.71.0/24 37100 8220 15404 193.29.144.0/20 37100 8220 15404 193.29.146.0/23 37100 8220 15404 - Withdrawn - matching aggregate 193.29.144.0/20 37100 8220 15404 193.29.150.0/23 37100 8220 15404 - Withdrawn - matching aggregate 193.29.144.0/20 37100 8220 15404 193.29.152.0/22 37100 8220 15404 - Withdrawn - matching aggregate 193.29.144.0/20 37100 8220 15404 193.29.156.0/23 37100 8220 15404 - Withdrawn - matching aggregate 193.29.144.0/20 37100 8220 15404 193.29.159.0/24 37100 8220 15404 - Withdrawn - matching aggregate 193.29.144.0/20 37100 8220 15404 193.36.241.0/24 37100 8220 15404 193.36.254.0/24 37100 8220 15404 193.38.200.0/24 37100 8220 15404 193.46.62.0/24 37100 8220 15404 193.47.140.0/24 37100 8220 15404 193.53.174.0/24 37100 8220 15404 193.53.185.0/24 37100 8220 15404 193.53.186.0/24 37100 8220 15404 193.53.188.0/24 37100 8220 15404 193.53.190.0/24 37100 8220 15404 193.56.33.0/24 37100 8220 15404 193.57.56.0/24 37100 8220 15404 193.58.6.0/24 6939 8220 15404 193.73.113.0/24 37100 8220 15404 193.102.79.0/24 37100 8220 15404 193.102.174.0/24 37100 8220 15404 193.103.129.0/24 37100 8220 15404 193.135.254.0/24 37100 8220 15404 193.164.14.0/24 6939 8220 15404 193.176.112.0/22 6939 8220 15404 + Announce - aggregate of 193.176.112.0/23 (6939 8220 15404) and 193.176.114.0/23 (6939 8220 15404) 193.176.112.0/23 6939 8220 15404 - Withdrawn - aggregated with 193.176.114.0/23 (6939 8220 15404) 193.176.114.0/23 6939 8220 15404 - Withdrawn - aggregated with 193.176.112.0/23 (6939 8220 15404) 193.177.180.0/23 37100 8220 15404 193.200.191.0/24 37100 8220 15404 194.11.129.0/24 6939 8220 15404 194.15.16.0/24 37100 8220 15404 194.15.18.0/24 37100 8220 15404 194.15.242.0/23 37100 8220 15404 194.15.244.0/22 37100 8220 15404 194.33.183.0/24 37100 8220 15404 194.39.220.0/24 37100 8220 15404 194.59.96.0/19 6939 8220 15404 194.59.121.0/24 6939 8220 15404 - Withdrawn - matching aggregate 194.59.96.0/19 6939 8220 15404 194.59.137.0/24 37100 8220 15404 194.59.139.0/24 37100 8220 15404 194.76.8.0/23 37100 8220 15404 + Announce - aggregate of 194.76.8.0/24 (37100 8220 15404) and 194.76.9.0/24 (37100 8220 15404) 194.76.8.0/24 37100 8220 15404 - Withdrawn - aggregated with 194.76.9.0/24 (37100 8220 15404) 194.76.9.0/24 37100 8220 15404 - Withdrawn - aggregated with 194.76.8.0/24 (37100 8220 15404) 194.99.12.0/24 37100 8220 15404 194.99.120.0/21 37100 8220 15404 194.117.239.0/24 6939 8220 15404 194.126.242.0/24 37100 8220 15404 194.173.47.0/24 37100 8220 15404 195.47.207.0/24 6939 8220 15404 195.182.60.0/24 37100 8220 15404 195.234.175.0/24 37100 8220 15404 202.246.252.0/24 37100 8220 15404 202.252.108.0/23 37100 8220 15404 213.163.237.0/24 37100 8220 15404
Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.
AS15404 92 More Specifics 150 Total Advertisements COLT Technology Services Group, GB
5.182.152.0/24 5.182.152.0/22
37.32.80.0/21 37.32.80.0/20
45.129.69.0/24 45.129.68.0/22
57.190.60.0/24 57.190.0.0/15
62.182.250.0/24 62.182.248.0/21
85.208.193.0/24 85.208.192.0/22
129.35.17.0/24 129.35.0.0/16
129.35.20.0/23 129.35.0.0/16
129.35.27.0/24 129.35.0.0/16
129.35.85.0/24 129.35.0.0/16
141.98.45.0/24 141.98.44.0/22
145.224.32.0/23 145.224.32.0/20
155.137.0.0/24 155.137.0.0/21
155.137.1.0/24 155.137.0.0/21
155.137.2.0/24 155.137.0.0/21
155.137.3.0/24 155.137.0.0/21
155.137.7.0/24 155.137.0.0/21
156.118.0.0/24 156.118.0.0/16
156.118.6.0/24 156.118.0.0/16
156.118.8.0/24 156.118.0.0/16
161.17.0.0/24 161.17.0.0/16
170.200.251.0/24 170.200.0.0/16
170.200.252.0/24 170.200.0.0/16
170.248.142.0/24 170.248.140.0/22
170.251.108.0/24 170.251.108.0/23
170.252.84.0/24 170.252.0.0/16
170.252.85.0/24 170.252.0.0/16
170.252.86.0/24 170.252.0.0/16
185.134.140.0/24 185.134.140.0/22
185.140.104.0/24 185.140.104.0/22
185.199.204.0/24 185.199.204.0/22
185.201.220.0/24 185.201.220.0/22
185.213.216.0/24 185.213.216.0/22
185.213.217.0/24 185.213.216.0/22
185.218.120.0/24 185.218.120.0/22
185.218.121.0/24 185.218.120.0/22
185.218.122.0/24 185.218.120.0/22
185.218.123.0/24 185.218.120.0/22
185.226.224.0/24 185.226.224.0/22
185.226.242.0/24 185.226.240.0/22
185.234.136.0/24 185.234.136.0/22
188.64.17.0/24 188.64.16.0/21
188.64.18.0/24 188.64.16.0/21
192.232.64.0/24 192.232.64.0/18
192.232.66.0/24 192.232.64.0/18
193.26.246.0/24 193.26.246.0/23
193.26.247.0/24 193.26.246.0/23
193.26.248.0/24 193.26.248.0/21
193.26.249.0/24 193.26.248.0/21
193.26.250.0/24 193.26.248.0/21
193.26.251.0/24 193.26.248.0/21
193.26.252.0/24 193.26.248.0/21
193.26.253.0/24 193.26.248.0/21
193.26.254.0/24 193.26.248.0/21
193.26.255.0/24 193.26.248.0/21
193.28.71.0/24 193.28.64.0/21
193.33.245.0/24 193.33.244.0/23
193.36.241.0/24 193.36.240.0/20
193.36.254.0/24 193.36.240.0/20
193.53.174.0/24 193.53.172.0/22
193.53.185.0/24 193.53.176.0/20
193.53.186.0/24 193.53.176.0/20
193.53.188.0/24 193.53.176.0/20
193.53.190.0/24 193.53.176.0/20
193.73.113.0/24 193.73.113.0/23
193.97.184.0/24 193.97.184.0/22
193.97.185.0/24 193.97.184.0/22
193.97.186.0/24 193.97.184.0/22
193.176.112.0/23 193.176.112.0/22
193.176.114.0/23 193.176.112.0/22
193.193.188.0/24 193.193.188.0/23
194.9.4.0/24 194.9.4.0/23
194.9.5.0/24 194.9.4.0/23
194.11.129.0/24 194.11.128.0/22
194.15.16.0/24 194.15.0.0/19
194.15.18.0/24 194.15.0.0/19
194.15.242.0/23 194.15.240.0/21
194.15.244.0/22 194.15.240.0/21
194.32.217.0/24 194.32.216.0/23
194.37.85.0/24 194.37.84.0/22
194.37.87.0/24 194.37.84.0/22
194.39.190.0/24 194.39.190.0/23
194.39.220.0/24 194.39.220.0/22
194.59.121.0/24 194.59.96.0/19
194.59.137.0/24 194.59.136.0/22
194.59.139.0/24 194.59.136.0/22
194.76.8.0/24 194.76.8.0/23
194.76.9.0/24 194.76.8.0/23
194.99.12.0/24 194.99.12.0/23
194.132.60.0/24 194.132.0.0/16
194.156.246.0/24 194.156.240.0/21
209.90.56.0/24 209.90.32.0/19
5.11.96.0/20 5.11.96.0/19
103.80.220.0/24 103.80.220.0/22
103.80.221.0/24 103.80.220.0/22
170.200.253.0/24 170.200.0.0/16
Prefixes added and withdrawn by this origin AS in the past 7 days.
+ 176.119.201.0/24 Announced
+ 192.101.197.0/24 Announced
+ 192.101.198.0/24 Announced
+ 193.150.169.0/24 Announced
+ 194.39.0.0/20 Announced
+ 194.39.16.0/21 Announced
+ 195.250.46.0/24 Announced
- 5.11.96.0/20 Withdrawn
- 103.80.220.0/24 Withdrawn
- 103.80.221.0/24 Withdrawn
- 170.200.253.0/24 Withdrawn
- 176.62.152.0/21 Withdrawn
- 178.249.200.0/21 Withdrawn
- 193.29.144.0/20 Withdrawn
whois: 402590
IANA has recorded AS15404 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS15404\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 'AS15400 - AS15474'
as-block: AS15400 - AS15474
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: 2018-11-22T15:27:25Z
last-modified: 2018-11-22T15:27:25Z
source: RIPE
% Information related to 'AS15404'
% Abuse contact for 'AS15404' is 'abuse@colt.net'
aut-num: AS15404
as-name: UNSPECIFIED
import: from AS8220 action pref=100; accept ANY
export: to AS8220 announce AS15404
org: ORG-CI9-RIPE
admin-c: COLT1-RIPE
tech-c: COLT1-RIPE
remarks: COLT Internet SE
status: ASSIGNED
mnt-by: RIPE-NCC-END-MNT
mnt-by: COLT-MNT
created: 1970-01-01T00:00:00Z
last-modified: 2019-11-05T14:32:24Z
source: RIPE
organisation: ORG-CI9-RIPE
org-name: COLT Technology Services Group Limited
country: GB
reg-nr: 03232904
org-type: LIR
address: Colt House, 20 Great Eastern Street,
address: EC2A 3EH
address: London
address: UNITED KINGDOM
phone: +442073903900
fax-no: +442078635610
admin-c: NG1400-RIPE
admin-c: EF139-RIPE
admin-c: MB7433-RIPE
abuse-c: CHM4-RIPE
mnt-ref: RIPE-NCC-HM-MNT
mnt-ref: COLT-UK
mnt-by: RIPE-NCC-HM-MNT
mnt-by: COLT-UK
created: 2004-04-17T12:12:30Z
last-modified: 2026-05-13T07:30:22Z
source: RIPE # Filtered
role: Internet Hostmaster
address: Network Engineering
address: Colt Technology Services
address: Powergate Business Centre
address: VOLT Avenue
address: London
address: NW10 6PW
admin-c: AJ574-RIPE
tech-c: RW1333-RIPE
tech-c: MB7433-RIPE
nic-hdl: COLT1-RIPE
mnt-by: COLT-MNT
created: 2002-04-24T15:13:27Z
last-modified: 2012-02-10T15:08:11Z
source: RIPE # Filtered
abuse-mailbox: abuse@colt.net
% This query was served by the RIPE Database Query Service version 1.122.1 (BUSA)