AS22061 Cloudflare,

CLOUDFLARE-MTC-CA - Cloudflare, · registered in the United States

IPv4 addresses2561 prefixes · <0.001% of announced IPv4

Rank in United States#13,330largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#61,115of 79,396 networks with IPv4

IPv61 x /481 prefixes

CountryUnited States18,679 ASNs registered there

Open AS22061 in ASN lookup Look up an IP in this network (173.245.51.1) All networks in United States

IPv4 prefixes

All 1 prefix, in address order.

173.245.51.0/24

IPv6 prefixes

All 1 prefix.

2400:cb00:1492::/48

Other ASNs named Cloudflare,

1 other network uses the same organisation name; together with AS22061 they announce 512 IPv4 addresses.

ASNNameIPv4 addresses

AS402542CLOUDFLARENET - Cloudflare, US256

Similar-sized networks in United States

ASNNameIPv4 addresses

AS20230#13327 CARRINGTON-MS-LLC-2007 - Carrington Mortgage Holdings, LLC256

AS20344#13328 BILLERICAPS-MA-ASN - Billerica Public Schools256

AS21630#13329 SHV1 - Sports South, L.L.C.256

AS22142#13331 FISERV-EPF-CHANDLER - Fiserv Solutions, LLC256

AS22336#13332 PELLA - Pella Corporation256

AS22437#13333 CORESITE-SPARE - CoreSite256

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