$ query “AS4043” --type=asn → 1 result(s)

AS4043 — MIC-ASN

Montana Internet Corporation

AS4043 is a residential access provider registered to Montana Internet Corporation, registered in the United States since 1994. The network announces a respectable 25 344 IPv4 addresses. Supports IPv6.

  • Pioneer — Registered before the year 2000

Basic Information

Country
🇺🇸 United States
Category
Internet Service Provider
Network Role
Access Provider
Data Origin
Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
Registered
November 17, 1994
Last Changed
March 04, 2026
Last Seen
March 05, 2026

Prefix Summary

IPv4 Prefixes (raw / aggregated)
4 / 4
IPv6 Prefixes (raw / aggregated)
1 / 1
IPv4 Addresses
25 344
Largest IPv4 Prefix
/18 (16 384 addresses)
Largest IPv6 Prefix
/32
Geolocated Countries
🇺🇸 US (4 IPs)
Prefix Changed
March 04, 2026

Reputation

Reputation
Pristine — 0 flagged IPs out of 25 344 total (0.00%)

Connectivity Summary

Upstream Providers
1 upstream autonomous systems providing transit
Peers
16 autonomous systems exchanging traffic without transit fees
Downstream Customers
1 downstream autonomous systems buying transit
Degree
19 unique BGP neighbors (providers + customers + peers)
Reach
1 — customer cone size measuring network influence
Degree Rank
#7 728
Reach Rank
#8 064

Upstream Providers (1)

  • AS6461 — ZAYO-6461 (Tier-1 transit)

Prefix Lists

IPv4 Prefixes (4 total)

  • 206.127.64.0/18 (16 384 addresses)
  • 209.161.128.0/19 (8 192 addresses)
  • 205.207.148.0/23 (512 addresses)
  • 199.5.172.0/24 (256 addresses)

IPv6 Prefixes (1 total)

  • 2607:f6b8::/32