AS208402 cerner Cerner Limited

cerner Cerner Limited · registered in the United Kingdom

IPv4 addresses1,0241 prefixes · <0.001% of announced IPv4

Rank in United Kingdom#1,017largest network in GB by IPv4 space, of 2,074 · <0.01% of GB

Rank worldwide#35,413of 79,396 networks with IPv4

IPv6128 x /481 prefixes

CountryUnited Kingdom2,261 ASNs registered there

Open AS208402 in ASN lookup Look up an IP in this network (45.133.20.1) All networks in United Kingdom

IPv4 prefixes

All 1 prefix, in address order.

45.133.20.0/22

IPv6 prefixes

All 1 prefix.

2a0c:c00:400::/41

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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