AS36321 Castle Global Inc.

CSTL - Castle Global Inc. · registered in the United States

IPv4 addresses1,7925 prefixes · <0.001% of announced IPv4

Rank in United States#6,576largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#24,949of 79,396 networks with IPv4

IPv61 x /481 prefixes

CountryUnited States18,679 ASNs registered there

Open AS36321 in ASN lookup Look up an IP in this network (64.124.8.1) All networks in United States

IPv4 prefixes

All 5 prefixes, in address order.

64.124.8.0/24
66.187.0.0/23
74.80.208.0/24
199.83.232.0/23
199.184.214.0/24

IPv6 prefixes

All 1 prefix.

2620:4e:e000::/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