AS4043 Montana Internet Corporation

United States MIC-ASN ARIN 4 IPv4 prefixes 1 IPv6 prefix

IPv4 addresses

25,344

IPv6 /48 networks

65,536

RPKI

0 valid5 no ROA

Peers and downstreams

Holder

AS name: MIC-ASN
Description: Montana Internet Corporation 1424 National Ave Helena MT 59601 United States
Organisation: Montana Internet Corporation
Abuse contact: Not published
Assigned: 1994-11-16
Registered: 1994-11-17
Record last changed: 2023-12-29 16:02 UTC

199.5.172.0/24 205.207.148.0/23 206.127.64.0/18 209.161.128.0/19

Upstream graph

Upstreams and their upstreams, from BGP paths

Network health

Grade C · 65/100

fail	Prefixes covered by valid ROAs 0 of 5 announced prefixes are RPKI valid, 5 have no ROA.	0/25
pass	No RPKI invalid announcements None of the announcements is RPKI invalid.	10/10
pass	Announces IPv6 1 IPv6 prefix.	15/15
pass	More than one upstream 2 upstreams seen in BGP.	10/10
pass	Working abuse contact support@mt.net is published.	15/15
fail	Publishes a geofeed No geofeed found. Without one, location databases have to guess.	0/10
pass	No prefixes smaller than /24 or /48 All prefixes are /24 (IPv4) or /48 (IPv6) or larger.	10/10
pass	Registry record maintained Last changed 2023-12-29.	5/5

Built from the announced prefixes, RPKI, the registry record and geofeeds. Checks without data are not counted. Also in the API.

Show this on your website

HTML

<a href="https://ip-fd.net/asn/4043"><img src="https://ip-fd.net/badge/asn/4043/health.svg" alt="AS4043 network health on IP-FD.net"></a>

Markdown

[![AS4043 network health](https://ip-fd.net/badge/asn/4043/health.svg)](https://ip-fd.net/asn/4043)

Use rpki.svg instead of health.svg for the RPKI badge.

Routing changes

Last 30 days

2026-10-05 21:55 UTC	Relationship changed	AS9002	upstream to peer
2026-10-05 21:55 UTC	Relationship changed	AS7575	upstream to peer
2026-10-05 21:55 UTC	Relationship changed	AS52025	upstream to peer
2026-10-05 21:55 UTC	Relationship changed	AS394256	upstream to peer
2026-10-05 21:55 UTC	Relationship changed	AS137409	upstream to peer

WHOIS

aut-num:        AS4043
as-name:        MIC-ASN
handle:         AS4043
registrant:     MIC-Z (Montana Internet Corporation)
abuse,noc:      NANC-ARIN (Network Abuse and NOC Contact) <support@mt.net>
technical:      JOSHU24-ARIN (Joshua A Romandia) <josh@mic.mt.net>
administrative: CRS12-ARIN (Charles Raymond Siefert) <chucksie@mic.mt.net>
technical:      FWC-ARIN (Forrest Christian) <forrestc@imach.com>
technical:      AU8-ARIN (Andy Utick) <AUTICK@mt.net>
technical:      FWC-ARIN (Forrest Christian) <forrestc@imach.com>
last changed:   2023-12-29T11:02:11-05:00
registration:   1994-11-17T00:00:00-05:00
source:         ARIN (RDAP)

Routing data

Updated just now

Registry record

Fetched just now from ARIN RDAP

Prefixes and neighbours come from the RIPE RIS route collectors. Data older than 5 minutes is refreshed when this page is opened.

API

curl -H "X-API-Key: YOUR_KEY" https://ip-fd.net/api/v1/asn/4043

const res = await fetch('https://ip-fd.net/api/v1/asn/4043', {
  headers: { 'X-API-Key': 'YOUR_KEY' }
});
const data = await res.json();
console.log(data);

import requests

r = requests.get('https://ip-fd.net/api/v1/asn/4043', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/4043');
curl_setopt($ch, CURLOPT_HTTPHEADER, ['X-API-Key: YOUR_KEY']);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$data = json_decode(curl_exec($ch), true);
print_r($data);

req, _ := http.NewRequest("GET", "https://ip-fd.net/api/v1/asn/4043", nil)
req.Header.Set("X-API-Key", "YOUR_KEY")
res, err := http.DefaultClient.Do(req)
if err != nil {
    log.Fatal(err)
}
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))

Works without a key at a lower rate. Get a free key.

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