AS28949 Technical University of Sofia

Bulgaria TUSNET-AS RIPE 17 IPv4 prefixes 0 IPv6 prefixes

IPv4 addresses

4,096

IPv6 /48 networks

RPKI

17 valid0 no ROA

Peers and downstreams

Holder

AS name: TUSNET-AS
Description: 8, Kliment Ohridski St. Sofia-1000, BULGARIA
Organisation: Technical University of Sofia
Registered in: Sofia, Bulgaria
Abuse contact: abuse@tu-sofia.bg
Assigned: 2003-04-15
Registered: 2003-04-16
Record last changed: 2025-12-23 06:42 UTC

81.161.240.0/20 81.161.240.0/24 81.161.241.0/24 81.161.242.0/24 81.161.243.0/24 81.161.244.0/24 81.161.245.0/24 81.161.246.0/24 81.161.247.0/24 81.161.248.0/24 81.161.249.0/24 81.161.250.0/24 81.161.251.0/24 81.161.252.0/24 81.161.253.0/24 81.161.254.0/24 81.161.255.0/24

Upstream graph

Upstreams and their upstreams, from BGP paths

Network health

Grade B · 75/100

pass	Prefixes covered by valid ROAs 17 of 17 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@tu-sofia.bg 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 2025-12-23.	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/28949"><img src="https://ip-fd.net/badge/asn/28949/health.svg" alt="AS28949 network health on IP-FD.net"></a>

Markdown

[![AS28949 network health](https://ip-fd.net/badge/asn/28949/health.svg)](https://ip-fd.net/asn/28949)

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:        AS28949
sponsoring-org: ORG-MN1-RIPE
as-name:        TUSNET-AS
descr:          8, Kliment Ohridski St.
descr:          Sofia-1000, BULGARIA
admin-c:        SP9887-RIPE
tech-c:         SP9887-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
org:            ORG-TUOS2-RIPE
mnt-by:         TUSOFIA-MNT
created:        2003-04-16T12:19:39Z
last-modified:  2025-12-23T06:42:18Z
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/28949

const res = await fetch('https://ip-fd.net/api/v1/asn/28949', {
  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/28949', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/28949');
curl_setopt($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/28949", 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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AS6802	Bulgarian Research and Education Network Association (BREN) UNICOM-B-AS
AS8717	A1 Bulgaria EAD A1BG