$ 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