AS21947 — BCI

Network type: hosting

AS21947 announces 29 IPv4 prefixes covering 70,144 addresses and 9 IPv6 prefixes.

About this network

BCI is the autonomous system for Blackfoot Communications, a rural telecommunications cooperative in Western Montana.

What it's used for

• The address space carries residential and business access traffic, evidenced by reverse DNS entries such as static.blackfoot.net, cutcom.net, and centric.net.
• With 70,144 IPv4 addresses announced across 29 prefixes and 30 observed neighbours, the ratio indicates an access network serving local subscribers rather than a transit provider.

Notable

• All sampled registrants are listed as Blackfoot Telephone Cooperative, Inc., matching the AS holder and confirming consistent ownership of the inventory.
• The inventory includes netnames like MONTANA-COM and FREMONT, reflecting historical acquisitions or regional service areas within the cooperative's footprint.
• The address inventory is finely subdivided into multiple /19, /20, and /21 blocks, typical of a regional ISP managing distinct customer segments or legacy allocations.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 64.25.128.0/23
• 64.25.131.0/24
• 64.25.132.0/22
• 64.25.136.0/21
• 66.109.128.0/20
• 66.109.144.0/22
• 66.109.148.0/23
• 66.109.151.0/24
• 66.109.152.0/21
• 69.51.64.0/22
• 69.51.68.0/23
• 69.51.72.0/21
• 69.51.80.0/20
• 69.51.96.0/19
• 69.165.112.0/20
• 192.150.152.0/21
• 192.225.176.0/20
• 198.60.195.0/24
• 199.195.120.0/21
• 204.11.244.0/22
• 205.167.162.0/23
• 209.137.225.0/24
• 209.137.226.0/23
• 209.137.228.0/22
• 209.137.232.0/21
• 209.137.240.0/20
• 209.200.192.0/19
• 216.14.224.0/19
• 216.47.48.0/20
• 2001:1940::/35
• 2001:1940:1900::/40
• 2001:1940:1a00::/39
• 2001:1940:1c00::/38
• 2001:1940:2000::/35
• 2001:1940:4000::/34
• 2001:1940:8000::/33
• 2604:300::/32
• 2607:f8e0::/32

Upstream networks

• AS1299 Arelion Sweden AB
• AS6939 Hurricane Electric LLC
• AS2914 NTT America, Inc.
• AS15305 Syringa Networks, LLC
• AS9002 RETN Limited
• AS394256 Tech Futures Interactive Inc.
• AS24482 SG.GS
• AS34927 iFog GmbH
• AS3130 RGnet OU
• AS7575 Australian Academic and Research Network (AARNet)
• AS293 ESnet

Downstream networks

• AS46324 Advanced Stream Inc.
• AS397162 Sumofiber
• AS395861 Medical Imaging Associates of Idaho Falls, Inc.
• AS22785 GLACIER BANCORP INC
• AS15331 Blackfoot Telephone Cooperative, Inc.
• AS402935 City
• AS27391 Washington Corporations
• AS33521 Missoula County Public Schools
• AS54410 Bozeman Deaconess Health Services
• AS1378 Interbel Telephone Cooperative, Inc.
• AS33281 BRIGHAM YOUNG UNIVERSITY - IDAHO
• AS20274 Flathead Valley Community College
• AS13590 Marcus Daly Memorial Hospital Corporation
• AS398437 Hot Springs Telephone Company
• AS393630 Avantguard Monitoring Centers

Adjacent networks

• AS1299 Arelion Sweden AB
• AS6939 Hurricane Electric LLC
• AS2914 NTT America, Inc.
• AS15305 Syringa Networks, LLC
• AS397162 Sumofiber
• AS46324 Advanced Stream Inc.
• AS395861 Medical Imaging Associates of Idaho Falls, Inc.
• AS22785 GLACIER BANCORP INC
• AS15331 Blackfoot Telephone Cooperative, Inc.
• AS402935 City
• AS27391 Washington Corporations
• AS33521 Missoula County Public Schools
• AS54410 Bozeman Deaconess Health Services
• AS9002 RETN Limited
• AS1378 Interbel Telephone Cooperative, Inc.
• AS394256 Tech Futures Interactive Inc.
• AS3130 RGnet OU
• AS24482 SG.GS
• AS34927 iFog GmbH
• AS33281 BRIGHAM YOUNG UNIVERSITY - IDAHO
• AS20274 Flathead Valley Community College
• AS13590 Marcus Daly Memorial Hospital Corporation
• AS7575 Australian Academic and Research Network (AARNet)
• AS398437 Hot Springs Telephone Company
• AS393630 Avantguard Monitoring Centers

Internet exchanges

• Seattle Internet Exchange — Seattle, United States
• Interconnection eXchange Denver — Denver, United States