AS58305 SYN-US SYN LTD

SYN-US SYN LTD · registered in the United Kingdom

IPv4 addresses2,0484 prefixes · <0.001% of announced IPv4

Rank in United Kingdom#720largest network in GB by IPv4 space, of 2,074 · <0.01% of GB

Rank worldwide#22,565of 79,396 networks with IPv4

IPv613 x /4813 prefixes

CountryUnited Kingdom2,261 ASNs registered there

Open AS58305 in ASN lookup Look up an IP in this network (107.161.163.1) All networks in United Kingdom

IPv4 prefixes

All 4 prefixes, in address order.

107.161.163.0/24
107.161.164.0/22
107.161.172.0/23
155.254.63.0/24

IPv6 prefixes

All 13 prefixes.

2a07:9942:39d6::/48
2a07:9944:40::/48
2a07:9945:45::/48
2a07:9946:17c::/48
2a07:9946:23b::/48
2a07:9946:826::/48
2a07:9946:db0::/48
2a07:9946:fd5::/48
2a07:9947:1c3::/48
2a07:9947:495::/48
2a07:9947:8cc::/48
2a07:9947:b6f::/48
2a07:9947:fef::/48

Similar-sized networks in United Kingdom

ASNNameIPv4 addresses

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AS49418#719 AS-NETSHIELD NETSHIELD LTD2,048

AS219302#721 seally-AS SEALLY LTD2,048

AS49694#722 UK-FR-MNLTD Masternaut Limited2,048

AS28729#723 FORD-AS Ford Motor Company Limited2,048

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources