AS36221 Esosoft Corporation

ESOSOFT - Esosoft Corporation · registered in the United States

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

Rank in United States#6,554largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#24,878of 79,396 networks with IPv4

IPv68 x /488 prefixes

CountryUnited States18,679 ASNs registered there

Open AS36221 in ASN lookup Look up an IP in this network (66.241.144.1) All networks in United States

IPv4 prefixes

All 5 prefixes, in address order.

66.241.144.0/23
66.241.146.0/24
66.241.148.0/24
66.241.150.0/24
66.241.158.0/23

IPv6 prefixes

All 8 prefixes.

2607:f7c8:1::/48
2607:f7c8:2::/48
2607:f7c8:88::/48
2607:f7c8:158::/48
2607:f7c8:400::/48
2607:f7c8:500::/48
2607:f7c8:600::/48
2607:f7c8:700::/48

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AS26710#6557 ICANN-ANYCASTED-SERVICES - ICANN1,792

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