AS39311 Mainstream doo Beograd

Serbia CS-CRI RIPE 1 IPv4 prefix 0 IPv6 prefixes

IPv4 addresses

256

IPv6 /48 networks

RPKI

1 valid0 no ROA

Peers and downstreams

Holder

AS name: CS-CRI
Description: Mainstream doo Beograd
Organisation: Mainstream doo Beograd
Registered in: Belgrade, Serbia
Abuse contact: abuse@mainstream.rs
Assigned: 2006-01-26
Registered: 2006-01-27
Record last changed: 2017-10-22 20:42 UTC

87.237.200.0/24

Upstream graph

Upstreams and their upstreams, from BGP paths

Network health

Grade C · 70/100

pass	Prefixes covered by valid ROAs 1 of 1 announced prefixes are RPKI valid.	25/25
pass	No RPKI invalid announcements None of the announcements is RPKI invalid.	10/10
fail	Announces IPv6 No IPv6 prefixes are announced.	0/15
pass	More than one upstream 2 upstreams seen in BGP.	10/10
pass	Working abuse contact abuse@mainstream.rs 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
fail	Registry record maintained Last changed 2017-10-22.	0/5

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/39311"><img src="https://ip-fd.net/badge/asn/39311/health.svg" alt="AS39311 network health on IP-FD.net"></a>

Markdown

[![AS39311 network health](https://ip-fd.net/badge/asn/39311/health.svg)](https://ip-fd.net/asn/39311)

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

Routing changes

Last 30 days

2026-10-05 14:12 UTC	Relationship changed	AS47734	upstream to peer
2026-10-05 14:12 UTC	Relationship changed	AS263444	upstream to peer
2026-10-05 14:12 UTC	Relationship changed	AS22356	upstream to peer
2026-10-05 14:12 UTC	Relationship changed	AS15958	upstream to peer
2026-10-05 14:12 UTC	Relationship changed	AS14840	upstream to peer

WHOIS

aut-num:        AS39311
as-name:        CS-CRI
org:            ORG-Cd2-RIPE
admin-c:        SM3468-RIPE
tech-c:         SP2330-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         MNT-CS-CRI-SP
created:        2006-01-27T14:14:22Z
last-modified:  2017-10-22T20:42:16Z
source:         RIPE
% 1 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/39311

const res = await fetch('https://ip-fd.net/api/v1/asn/39311', {
  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/39311', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/39311');
curl_setopt($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/39311", 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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AS263444	Open X Tecnologia Ltda AS263444