AS21947 BCI - Blackfoot Telephone Cooperative, Inc.
🇺🇸ARINassigned
Announced Prefixes (BGP)
17total
14 IPv43 IPv6
IPv4 Addresses
Allocated (RIR)71,424
Announced (BGP)71,424
IPv6 Addresses
Allocated (RIR)2.3×10²⁹
Announced (BGP)2.3×10²⁹
Announced Prefixes
(BGP)17|
Prefix | RPKI | IRR | Last Seen |
|---|---|---|---|
| Valid | ARINOther IRR | 2026-10-11 | |
| Valid | ARINOther IRR | 2026-10-11 | |
| Valid | ARINOther IRR | 2026-10-11 | |
| Valid | ARINOther IRR | 2026-10-11 | |
| Valid | ARINOther IRR | 2026-10-11 | |
| Valid | ARINOther IRR | 2026-10-11 | |
| No ROA | Other IRR | 2026-10-11 | |
| Valid | ARINOther IRR | 2026-10-11 | |
| Valid | ARINOther IRR | 2026-10-11 | |
| No ROA | Other IRR | 2026-10-11 |
1-10 of 17
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Allocated Prefixes
(RIR)17Prefix | Country | RIR | Status |
|---|---|---|---|
| 64.25.128.0/20 | 🇺🇸 US | ARIN | allocated |
| 66.109.128.0/19 | 🇺🇸 US | ARIN | allocated |
| 69.51.64.0/18 | 🇺🇸 US | ARIN | allocated |
| 69.165.112.0/20 | 🇺🇸 US | ARIN | allocated |
| 192.150.152.0/21 | 🇺🇸 US | ARIN | allocated |
| 192.225.176.0/20 | 🇺🇸 US | ARIN | allocated |
| 198.60.195.0/24 | 🇺🇸 US | ARIN | allocated |
| 199.195.120.0/21 | 🇺🇸 US | ARIN | allocated |
| 204.11.244.0/22 | 🇺🇸 US | ARIN | allocated |
| 205.167.162.0/23 | 🇺🇸 US | ARIN | allocated |
1-10 of 17
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All 17 announced prefixes of AS21947 →
Downstream Customers(1)
| ASN | Name |
|---|---|
| AS402935 | 🇺🇸CITY-OF-BELGRADE-MT - City |
BGP Neighbours
(seen in AS paths)Upstreams (3)
Networks AS21947 hands its own prefixes to: transit providers, or peers at an exchange.
Downstreams (10)
Networks whose own prefixes AS21947 passes on: usually its customers.
- AS27391Washington Corporations3
- AS15331Blackfoot Telephone Cooperative2
- AS33281BRIGHAM YOUNG UNIVERSITY IDAHO2
- AS395861Medical Imaging Associates Of Idaho Falls2
- AS20274Flathead Valley Community College1
- AS22785GLACIER BANCORP1
- AS33521Missoula County Public Schools1
- AS46324Advanced Stream1
- AS54410Bozeman Deaconess Health Services1
- AS397162Sumofiber1
External Links
Learn more
- What is an ASN?Autonomous systems, ASN ranges and how they are assigned
- RPKI and route origin validationWhat the RPKI badges on the prefix list mean
- How to run an ASPA checkVerify the upstream providers listed above
- IPv4 transfers in the ARIN regionMonthly volume and the latest registry transfers
- ASN data in AI agents and SIEMMCP server and API integrations
API
Open https://api.ipctl.io/v1/asn/21947Returns ASN details, announced prefixes, and BGP routing data.
curl -s "https://api.ipctl.io/v1/asn/21947" | jq