AS16519 University of Colorado Denver

United States CUDENVER ARIN 2 IPv4 prefixes 1 IPv6 prefix

IPv4 addresses

131,072

IPv6 /48 networks

256

RPKI

3 valid0 no ROA

Peers and downstreams

Holder

AS name: CUDENVER
Description: University of Colorado Denver
Organisation: University of Colorado Denver
Abuse contact: Not published
Assigned: 2000-05-04
Registered: 2000-05-05
Record last changed: 2026-01-07 16:05 UTC

132.194.0.0/16 140.226.0.0/16

Upstream graph

Upstreams and their upstreams, from BGP paths

Network health

Grade B · 85/100

pass	Prefixes covered by valid ROAs 3 of 3 announced prefixes are RPKI valid.	25/25
pass	No RPKI invalid announcements None of the announcements is RPKI invalid.	10/10
pass	Announces IPv6 1 IPv6 prefix.	15/15
partly	More than one upstream 1 upstream seen in BGP.	5/10
pass	Working abuse contact piotr.artwich@ucdenver.edu 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 2026-01-07.	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/16519"><img src="https://ip-fd.net/badge/asn/16519/health.svg" alt="AS16519 network health on IP-FD.net"></a>

Markdown

[![AS16519 network health](https://ip-fd.net/badge/asn/16519/health.svg)](https://ip-fd.net/asn/16519)

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

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:        AS16519
as-name:        CUDENVER
handle:         AS16519
registrant:     UCAD-1 (University of Colorado Denver)
abuse,noc,routing,technical:ARTWI-ARIN (Piotr Artwich) <piotr.artwich@ucdenver.edu>
abuse,routing,technical,administrative,noc:LINDG32-ARIN (Mattias Lindgren) <mattias.lindgren@cuanschutz.edu>
technical,abuse,noc:LINDG32-ARIN (Mattias Lindgren) <mattias.lindgren@cuanschutz.edu>
last changed:   2026-01-07T11:05:46-05:00
registration:   2000-05-05T00:00:00-04:00
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/16519

const res = await fetch('https://ip-fd.net/api/v1/asn/16519', {
  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/16519', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/16519');
curl_setopt($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/16519", 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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