AS18596 Madison Telephone Company

MADISONTELCO - Madison Telephone Company · registered in the United States

IPv4 addresses12,2886 prefixes · <0.001% of announced IPv4

Rank in United States#2,670largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#8,115of 79,396 networks with IPv4

IPv61 x /32 (65,536 x /48)1 prefixes

CountryUnited States18,679 ASNs registered there

Open AS18596 in ASN lookup Look up an IP in this network (66.242.192.1) All networks in United States

IPv4 prefixes

All 6 prefixes, in address order.

66.242.192.0/20
66.242.208.0/21
66.242.216.0/22
66.242.220.0/23
66.242.222.0/23
76.77.224.0/20

IPv6 prefixes

All 1 prefix.

2605:1680::/32

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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