AS203898 CLOUDFLARENET-UK Cloudflare Inc

CLOUDFLARENET-UK Cloudflare Inc · registered in the United States

IPv4 addresses2561 prefixes · <0.001% of announced IPv4

Rank in United States#13,249largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#60,923of 79,396 networks with IPv4

IPv62 x /482 prefixes

CountryUnited States18,679 ASNs registered there

Open AS203898 in ASN lookup Look up an IP in this network (185.122.0.1) All networks in United States

IPv4 prefixes

All 1 prefix, in address order.

185.122.0.0/24

IPv6 prefixes

All 2 prefixes.

2606:54c1:a::/48
2606:54c1:c::/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