AS204154 FIRST-SERVER-US-AS FIRST SERVER LIMITED

FIRST-SERVER-US-AS FIRST SERVER LIMITED · registered in the United Kingdom

IPv4 addresses2,3047 prefixes · <0.001% of announced IPv4

Rank in United Kingdom#673largest network in GB by IPv4 space, of 2,074 · <0.01% of GB

Rank worldwide#20,738of 79,396 networks with IPv4

IPv63 x /483 prefixes

CountryUnited Kingdom2,261 ASNs registered there

Open AS204154 in ASN lookup Look up an IP in this network (45.86.47.1) All networks in United Kingdom

IPv4 prefixes

All 7 prefixes, in address order.

45.86.47.0/24
46.8.180.0/23
46.17.107.0/24
92.118.10.0/24
132.243.28.0/23
185.172.129.0/24
185.200.191.0/24

IPv6 prefixes

All 3 prefixes.

2a04:5201:1::/48
2a0c:5d00:3009::/48
2a0c:5d00:ff07::/48

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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