AS4004 Cogent Communications, LLC

United States COGENT-4000 ARIN 0 IPv4 prefixes 0 IPv6 prefixes

IPv4 addresses

IPv6 /48 networks

RPKI

0 valid0 no ROA

Peers and downstreams

Holder

AS name: COGENT-4000
Description: Cogent Communications, LLC
Organisation: Cogent Communications, LLC
Abuse contact: Not published
Assigned: 1994-11-03
Registered: 1994-11-04
Record last changed: 2025-12-23 15:12 UTC

None announced.

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Upstream graph

Upstreams and their upstreams, from BGP paths

Routing changes

Last 30 days

No changes recorded in the last 30 days. Changes are recorded each time the routing data of this AS is refreshed. Get alerts in real time.

WHOIS

aut-num:        AS4004
as-name:        COGENT-4000
handle:         AS4000
registrant:     COGC (Cogent Communications, LLC)
noc:            ZC108-ARIN (Cogent Communications) <noc@cogentco.com>
abuse:          COGEN-ARIN (Cogent Abuse) <abuse@cogentco.com>
technical,administrative:IPALL-ARIN (IP Allocation) <ipalloc@cogentco.com>
last changed:   2025-12-23T10:12:52-05:00
registration:   1994-11-04T00:00:00-05:00
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/4004

const res = await fetch('https://ip-fd.net/api/v1/asn/4004', {
  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/4004', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/4004');
curl_setopt($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/4004", 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))

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