AS4043 Montana Internet Corporation

MIC-ASN - Montana Internet Corporation · registered in the United States

IPv4 addresses25,3444 prefixes · <0.001% of announced IPv4

Rank in United States#1,911largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#5,409of 79,396 networks with IPv4

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

CountryUnited States18,679 ASNs registered there

Open AS4043 in ASN lookup Look up an IP in this network (199.5.172.1) All networks in United States

IPv4 prefixes

All 4 prefixes, in address order.

199.5.172.0/24
205.207.148.0/23
206.127.64.0/18
209.161.128.0/19

IPv6 prefixes

All 1 prefix.

2607:f6b8::/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