SYN HOLDINGS LTD
SYN LTD
LEI
254900KQMTJQ0XX45X86
Registered name
SYN HOLDINGS LTD
Jurisdiction
GB
Ultimate parent
No parent on file in GLEIF
Cluster stats
Netblocks145
All fragments 216 blocks across 16 clusters
Cluster ID191593879
RegistryAPNIC
Owner jurisdictionGB
Customersfind customers using this network →
Evidence & provenance ?
Attribution unresolved
Legal identityLEI 254900KQMTJQ0XX45X86
Shared handles clustered on 22 shared RIR contact/maintainer handles
Registry names 16 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works

Footprint over time

2 weekly snapshots · JSON
145 0 netblocks since 2026-07-05
2026-07-05 peak 145 2026-07-06

IP Ranges (145)

showing 50 of 145 — see all — ⬇ export CSV
CIDR Org name Registry Status Confidence
43.239.88.0/22 SYN LTD BGP ANNOUNCED ● high
45.43.64.0/24 SYN LTD BGP ANNOUNCED ● high
45.43.65.0/24 SYN LTD BGP ANNOUNCED ● high
45.43.67.0/24 SYN LTD BGP ANNOUNCED ● high
45.43.68.0/22 SYN LTD BGP ANNOUNCED ● high
45.43.80.0/22 SYN LTD BGP ANNOUNCED ● high
45.43.84.0/23 SYN LTD BGP ANNOUNCED ● high
45.43.87.0/24 SYN LTD BGP ANNOUNCED ● high
45.43.93.0/24 SYN LTD BGP ANNOUNCED ● high
45.43.94.0/24 SYN LTD BGP ANNOUNCED ● high
45.43.95.0/24 SYN LTD BGP ANNOUNCED ● high
87.239.253.0/24 SYN LTD BGP ANNOUNCED ● high
89.33.6.0/24 SYN LTD BGP ANNOUNCED ● high
89.33.7.0/24 SYN LTD BGP ANNOUNCED ● high
91.210.64.0/22 SYN LTD BGP ANNOUNCED ● high
91.226.97.0/24 SYN LTD BGP ANNOUNCED ● high
94.177.5.0/24 SYN LTD BGP ANNOUNCED ● high
103.206.232.0/22 SYN LTD BGP ANNOUNCED ● high
107.161.163.0/24 SYN LTD BGP ANNOUNCED ● high
107.161.164.0/24 SYN LTD BGP ANNOUNCED ● high
107.161.165.0/24 SYN LTD BGP ANNOUNCED ● high
107.161.166.0/24 SYN LTD BGP ANNOUNCED ● high
107.161.167.0/24 SYN LTD BGP ANNOUNCED ● high
107.161.172.0/24 SYN LTD BGP ANNOUNCED ● high
107.161.173.0/24 SYN LTD BGP ANNOUNCED ● high
107.181.128.0/22 SYN LTD BGP ANNOUNCED ● high
107.181.132.0/23 SYN LTD BGP ANNOUNCED ● high
107.181.140.0/22 SYN LTD BGP ANNOUNCED ● high
107.181.148.0/23 SYN LTD BGP ANNOUNCED ● high
107.181.150.0/24 SYN LTD BGP ANNOUNCED ● high
107.181.152.0/24 SYN LTD BGP ANNOUNCED ● high
107.181.153.0/24 SYN LTD BGP ANNOUNCED ● high
107.181.154.0/24 SYN LTD BGP ANNOUNCED ● high
107.181.156.0/22 SYN LTD BGP ANNOUNCED ● high
113.20.157.0/24 SYN LTD BGP ANNOUNCED ● high
113.20.158.0/24 SYN LTD BGP ANNOUNCED ● high
155.254.32.0/24 SYN LTD BGP ANNOUNCED ● high
155.254.33.0/24 SYN LTD BGP ANNOUNCED ● high
155.254.34.0/24 SYN LTD BGP ANNOUNCED ● high
155.254.36.0/22 SYN LTD BGP ANNOUNCED ● high
155.254.40.0/22 SYN LTD BGP ANNOUNCED ● high
155.254.44.0/22 SYN LTD BGP ANNOUNCED ● high
155.254.48.0/23 SYN LTD BGP ANNOUNCED ● high
155.254.50.0/23 SYN LTD BGP ANNOUNCED ● high
155.254.52.0/22 SYN LTD BGP ANNOUNCED ● high
155.254.56.0/22 SYN LTD BGP ANNOUNCED ● high
155.254.61.0/24 SYN LTD BGP ANNOUNCED ● high
155.254.63.0/24 SYN LTD BGP ANNOUNCED ● high
162.220.246.0/23 SYN LTD BGP ANNOUNCED ● high
185.135.212.0/22 SYN LTD BGP ANNOUNCED ● high

Network trust

what's this?
RPKI hygiene: C how networks compare →
78.6% of checked blocks have valid RPKI ROA coverage (114 of 145)
Wholesale/transit re-announcements (90)

These blocks are registered to SYN LTD but cryptographically authorized across 6 different networks — typical for a large wholesale or transit carrier whose address space is substantially re-announced by downstream customers under their own ASNs, not individually noteworthy.

2a02:2ca0::/29 /29 authorized for AS43350 — NForce Entertainment B.V.
2a05:9f46::/32 /32 authorized for AS42831 — UK Dedicated Servers Limited
2a05:9f47::/32 /32 authorized for AS42831 — UK Dedicated Servers Limited
2a02:2ca0:64::/48 /48 authorized for AS43350 — NForce Entertainment B.V.
2a02:2ca0:aaa::/48 /48 authorized for AS43350 — NForce Entertainment B.V.
2a07:9944:40::/48 /48 authorized for AS23470 — ReliableSite.Net LLC
2a05:9f44:2a05::/48 /48 authorized for AS42831 — UK Dedicated Servers Limited
2a05:9f40:1f::/48 /48 authorized for AS42831 — UK Dedicated Servers Limited
2a02:2ca0:1111::/48 /48 authorized for AS43350 — NForce Entertainment B.V.
2a02:2ca0:10::/48 /48 authorized for AS43350 — NForce Entertainment B.V.
2a07:9940:3333::/48 /48 authorized for AS40676 — Psychz Networks
2a05:9f40:1f::/48 /48 authorized for AS42831 — UK Dedicated Servers Limited
2a05:9f44:2a05::/48 /48 authorized for AS42831 — UK Dedicated Servers Limited
2a07:9942:39d6::/48 /48 authorized for AS23470 — ReliableSite.Net LLC
2a07:9944:40::/48 /48 authorized for AS23470 — ReliableSite.Net LLC
+75 more — see the REST API

NIC Handles

AH1343-AP ARCOR-MNT AS50077 AS58305 AS64080 DUMY-RIPE DUMY-RIPE INTERB-MNT MAINT-HK-HKBNESL MH1716-AP MNT-MCM MNT-SYN +10 more