AS51377 CoMaSys ApS

Denmark COMASYS RIPE 5 IPv4 prefixes 1 IPv6 prefix

IPv4 addresses

1,280

IPv6 /48 networks

524,288

RPKI

6 valid0 no ROA

Peers and downstreams

Holder

AS name: COMASYS
Description: CoMaSys ApS
Organisation: CoMaSys ApS
Abuse contact: abuse@comasys.dk
Assigned: 2017-08-02
Registered: 2017-08-03
Record last changed: 2025-04-22 08:29 UTC

185.210.176.0/24 185.210.177.0/24 185.210.178.0/24 185.210.179.0/24 193.221.124.0/24

Upstream graph

Upstreams and their upstreams, from BGP paths

Network health

Grade B · 85/100

pass	Prefixes covered by valid ROAs 6 of 6 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 abuse@comasys.dk 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 2025-04-22.	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/51377"><img src="https://ip-fd.net/badge/asn/51377/health.svg" alt="AS51377 network health on IP-FD.net"></a>

Markdown

[![AS51377 network health](https://ip-fd.net/badge/asn/51377/health.svg)](https://ip-fd.net/asn/51377)

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

Routing changes

Last 30 days

2026-10-04 10:09 UTC

New prefix

2a0b:b3c0::/29

WHOIS

aut-num:        AS51377
as-name:        COMASYS
org:            ORG-CA2669-RIPE
admin-c:        NA9218-RIPE
tech-c:         NA9218-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         lir-dk-comasys1-1-MNT
created:        2017-08-03T07:57:02Z
last-modified:  2025-04-22T08:29:52Z
source:         RIPE
% 6 routing policy lines (import/export) not shown

Routing data

Updated just now

Registry record

Fetched just now from RIPE

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/51377

const res = await fetch('https://ip-fd.net/api/v1/asn/51377', {
  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/51377', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/51377');
curl_setopt($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/51377", 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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