58305 SYN-US SYN, GB
Adjacency: 1 Upstream: 1 Downstream: 0
Upstream Adjacent AS list
AS23470 RELIABLESITE, US
Rank AS Type Originate Addr Space (pfx) Transit Addr space (pfx) Description 25874 AS58305 ORIGIN Originate: 2048 /21.00 Transit: 0 /0.00 SYN-US SYN, 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 % 10728 AS58305 SYN-US SYN, GB 8 6 2 4 4 50.00% Prefix AS Path Aggregation Suggestion 107.161.163.0/24 22652 23470 58305 58305 58305 107.161.164.0/22 2914 23470 58305 58305 58305 + Announce - aggregate of 107.161.164.0/23 (2914 23470 58305 58305 58305) and 107.161.166.0/23 (2914 23470 58305 58305 58305) 107.161.164.0/24 2914 23470 58305 58305 58305 - Withdrawn - aggregated with 107.161.165.0/24 (2914 23470 58305 58305 58305) 107.161.165.0/24 2914 23470 58305 58305 58305 - Withdrawn - aggregated with 107.161.164.0/24 (2914 23470 58305 58305 58305) 107.161.166.0/24 2914 23470 58305 58305 58305 - Withdrawn - aggregated with 107.161.167.0/24 (2914 23470 58305 58305 58305) 107.161.167.0/24 2914 23470 58305 58305 58305 - Withdrawn - aggregated with 107.161.166.0/24 (2914 23470 58305 58305 58305) 107.161.172.0/23 22652 23470 58305 58305 58305 + Announce - aggregate of 107.161.172.0/24 (22652 23470 58305 58305 58305) and 107.161.173.0/24 (22652 23470 58305 58305 58305) 107.161.172.0/24 22652 23470 58305 58305 58305 - Withdrawn - aggregated with 107.161.173.0/24 (22652 23470 58305 58305 58305) 107.161.173.0/24 22652 23470 58305 58305 58305 - Withdrawn - aggregated with 107.161.172.0/24 (22652 23470 58305 58305 58305) 155.254.63.0/24 22652 23470 58305 58305 58305
Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.
AS58305 35 More Specifics 35 Total Advertisements SYN-US SYN, GB
45.43.66.0/23 45.43.64.0/19
45.43.74.0/23 45.43.64.0/19
45.43.76.0/22 45.43.64.0/19
72.14.134.0/24 72.14.128.0/19
107.161.160.0/24 107.161.160.0/20
107.161.161.0/24 107.161.160.0/20
107.161.162.0/24 107.161.160.0/20
107.161.164.0/24 107.161.160.0/20
107.161.165.0/24 107.161.160.0/20
107.161.166.0/24 107.161.160.0/20
107.161.167.0/24 107.161.160.0/20
107.161.168.0/24 107.161.160.0/20
107.161.169.0/24 107.161.160.0/20
107.161.170.0/24 107.161.160.0/20
107.161.171.0/24 107.161.160.0/20
107.161.172.0/24 107.161.160.0/20
107.161.173.0/24 107.161.160.0/20
107.181.138.0/23 107.181.128.0/19
107.181.140.0/22 107.181.128.0/19
107.181.144.0/23 107.181.128.0/19
107.181.151.0/24 107.181.128.0/19
155.254.32.0/22 155.254.32.0/19
155.254.61.0/24 155.254.32.0/19
155.254.63.0/24 155.254.32.0/19
162.217.248.0/24 162.217.248.0/22
162.217.249.0/24 162.217.248.0/22
162.217.250.0/24 162.217.248.0/22
162.220.240.0/24 162.220.240.0/21
162.220.241.0/24 162.220.240.0/21
162.220.242.0/24 162.220.240.0/21
198.105.101.0/24 198.105.96.0/19
198.105.102.0/24 198.105.96.0/19
198.105.103.0/24 198.105.96.0/19
198.105.116.0/23 198.105.96.0/19
198.105.124.0/23 198.105.96.0/19
107.161.174.0/23 107.161.160.0/20
155.254.36.0/23 155.254.32.0/19
155.254.38.0/23 155.254.32.0/19
155.254.62.0/24 155.254.32.0/19
162.217.251.0/24 162.217.248.0/22
198.105.120.0/23 198.105.96.0/19
198.105.122.0/23 198.105.96.0/19
Prefixes added and withdrawn by this origin AS in the past 7 days.
+ 45.43.66.0/23 Announced
+ 45.43.74.0/23 Announced
+ 72.14.134.0/24 Announced
+ 107.161.160.0/24 Announced
+ 107.161.161.0/24 Announced
+ 107.161.162.0/24 Announced
+ 107.161.164.0/24 Announced
+ 107.161.165.0/24 Announced
+ 107.161.166.0/24 Announced
+ 107.161.167.0/24 Announced
+ 107.161.168.0/24 Announced
+ 107.161.169.0/24 Announced
+ 107.161.170.0/24 Announced
+ 107.161.171.0/24 Announced
+ 107.161.172.0/24 Announced
+ 107.161.173.0/24 Announced
+ 107.181.140.0/22 Announced
+ 107.181.151.0/24 Announced
+ 155.254.32.0/22 Announced
+ 155.254.61.0/24 Announced
+ 155.254.63.0/24 Announced
+ 162.217.248.0/24 Announced
+ 162.217.249.0/24 Announced
+ 162.217.250.0/24 Announced
+ 162.220.240.0/24 Announced
+ 162.220.241.0/24 Announced
+ 162.220.242.0/24 Announced
+ 198.105.101.0/24 Announced
+ 198.105.102.0/24 Announced
+ 198.105.103.0/24 Announced
- 107.161.174.0/23 Withdrawn
- 155.254.36.0/23 Withdrawn
- 155.254.38.0/23 Withdrawn
- 155.254.62.0/24 Withdrawn
- 162.217.251.0/24 Withdrawn
- 198.105.120.0/23 Withdrawn
- 198.105.122.0/23 Withdrawn
whois: 402590
IANA has recorded AS58305 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS58305\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 'AS57975 - AS58367'
as-block: AS57975 - AS58367
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
% Information related to 'AS58305'
% Abuse contact for 'AS58305' is 'abuse@syn.one'
aut-num: AS58305
as-name: SYN-US
descr: SYN
org: ORG-ZL31-RIPE
import: from AS26548 accept ANY
export: to AS26548 announce AS-SYN
import: from AS23470 accept ANY
export: to AS23470 announce AS-SYN
admin-c: SYN16-RIPE
tech-c: SYN16-RIPE
status: ASSIGNED
mnt-by: RIPE-NCC-END-MNT
mnt-by: MNT-SYN
created: 2015-01-13T09:47:50Z
last-modified: 2025-04-14T16:22:43Z
source: RIPE
organisation: ORG-ZL31-RIPE
org-name: SYN LTD
country: GB
reg-nr: 09243303
org-type: LIR
address: Crown House, 27 Old Gloucester Street
address: WC1N 3AX
address: London
address: UNITED KINGDOM
phone: +442476980698
abuse-c: SYN16-RIPE
mnt-ref: MNT-SYN
mnt-ref: RIPE-NCC-HM-MNT
mnt-by: RIPE-NCC-HM-MNT
mnt-by: MNT-SYN
created: 2015-01-12T15:01:45Z
last-modified: 2026-05-13T07:36:01Z
source: RIPE # Filtered
role: SYN LTD
address: Crown House, 27 Old Gloucester Street
address: London, WC1N 3AX
address: UNITED KINGDOM
abuse-mailbox: abuse@syn.one
nic-hdl: SYN16-RIPE
mnt-by: MNT-SYN
created: 2016-02-10T12:33:51Z
last-modified: 2022-10-07T13:21:59Z
source: RIPE # Filtered
% This query was served by the RIPE Database Query Service version 1.122.1 (ABERDEEN)