$ query “AS21947” --type=asn → 1 result(s)

AS21947 · BCI

Blackfoot Telephone Cooperative Inc.

AS21947 is operated by Blackfoot Telephone Cooperative Inc. and serves as a mid-size transit provider, registered in the United States since 2001. The system announces a respectable 71 424 IPv4 addresses, and supports IPv6. The bulk of its IP address space is in the United States, with additional presence in Australia.

  • Top 5% — Top 5% of all autonomous systems by reach and degree

Basic Information

Country
🇺🇸 United States
Category
Internet Service Provider
Network Role
Mid-size Transit
Data Origin
Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
Registered
July 17, 2001
Last Changed
March 04, 2026
Last Seen
April 20, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
14 / 14
IPv6 Prefixes (raw / aggregated)
3 / 3
IPv4 Addresses
71 424
Largest IPv4 Prefix
/18 (16 384 addresses)
Largest IPv6 Prefix
/32
Geolocated Countries
🇺🇸 United States (91 648 IPs), 🇦🇺 Australia (256 IPs)
Prefix Changed
March 04, 2026

Reputation

Reputation
Pristine — 0 flagged IPs

Connectivity Summary

Upstream Providers
3 upstreams providing transit
Peers
17 networks exchanging traffic without transit
Downstream Customers
15 downstreams buying transit
Unclassified
1 unclassified BGP neighbor
Degree
36 unique BGP neighbors
Reach
17 networks in customer cone

Upstream Providers (3)

  • AS1299 — TWELVE99 (Tier-1 transit)
  • AS2914 — NTT-DATA-2914 (Tier-1 transit)
  • AS15305 — SYRINGANETWORKS

Prefix Lists

IPv4 Prefixes (14 total)

  • 69.51.64.0/18 (16 384 addresses (/18 prefix))
  • 216.14.224.0/19 (8 192 addresses (/19 prefix))
  • 66.109.128.0/19 (8 192 addresses (/19 prefix))
  • 209.137.224.0/19 (8 192 addresses (/19 prefix))
  • 209.200.192.0/19 (8 192 addresses (/19 prefix))
  • 69.165.112.0/20 (4 096 addresses (/20 prefix))
  • 192.225.176.0/20 (4 096 addresses (/20 prefix))
  • 216.47.48.0/20 (4 096 addresses (/20 prefix))
  • 64.25.128.0/20 (4 096 addresses (/20 prefix))
  • 192.150.152.0/21 (2 048 addresses (/21 prefix))
  • 199.195.120.0/21 (2 048 addresses (/21 prefix))
  • 204.11.244.0/22 (1 024 addresses (/22 prefix))
  • 205.167.162.0/23 (512 addresses (/23 prefix))
  • 198.60.195.0/24 (256 addresses (/24 prefix))

IPv6 Prefixes (3 total)

  • 2001:1940::/32
  • 2604:300::/32
  • 2607:f8e0::/32