AS18897 Montana Sky Networks, Inc.

MONTANA-SKY-NETWORKS-INC - Montana Sky Networks, Inc. · registered in the United States

IPv4 addresses20,2248 prefixes · <0.001% of announced IPv4

Rank in United States#2,122largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#6,109of 79,396 networks with IPv4

IPv62 x /32 (131,072 x /48)24 prefixes

CountryUnited States18,679 ASNs registered there

Open AS18897 in ASN lookup Look up an IP in this network (66.135.64.1) All networks in United States

IPv4 prefixes

All 8 prefixes, in address order.

66.135.64.0/20
66.135.80.0/21
66.135.88.0/22
66.135.92.0/23
66.135.95.0/24
107.191.160.0/20
208.123.192.0/20
216.211.176.0/20

IPv6 prefixes

All 24 prefixes.

2604:7c80::/45
2604:7c80:8::/46
2604:7c80:c::/47
2604:7c80:e::/48
2604:7c80:f::/48
2604:7c80:10::/47
2604:7c80:12::/48
2604:7c80:13::/48
2604:7c80:14::/46
2604:7c80:18::/47
2604:7c80:1a::/47
2604:7c80:1c::/46
2604:7c80:20::/43
2604:7c80:40::/42
2604:7c80:80::/41
2604:7c80:100::/40
2604:7c80:200::/39
2604:7c80:400::/38
2604:7c80:800::/37
2604:7c80:1000::/36
2604:7c80:2000::/35
2604:7c80:4000::/34
2604:7c80:8000::/33
2606:b580::/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