AS51155 Citylink Telecom Sp. z o.o.

Poland TBTELECOM RIPE 3 IPv4 prefixes 1 IPv6 prefix

IPv4 addresses

5,120

IPv6 /48 networks

65,536

RPKI

4 valid0 no ROA

Peers and downstreams

Holder

AS name: TBTELECOM
Description: Citylink Telecom Sp. z o.o.
Organisation: Citylink Telecom Sp. z o.o.
Registered in: Gdańsk, Poland
Abuse contact: ripe@tbtelecom.pl
Assigned: 2010-06-08
Registered: 2010-06-09
Record last changed: 2024-10-03 18:25 UTC

178.19.176.0/20 46.227.36.0/23 46.227.38.0/23

Upstream graph

Upstreams and their upstreams, from BGP paths

Network health

Grade A · 90/100

pass	Prefixes covered by valid ROAs 4 of 4 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
pass	More than one upstream 4 upstreams seen in BGP.	10/10
pass	Working abuse contact ripe@tbtelecom.pl 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 2024-10-03.	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/51155"><img src="https://ip-fd.net/badge/asn/51155/health.svg" alt="AS51155 network health on IP-FD.net"></a>

Markdown

[![AS51155 network health](https://ip-fd.net/badge/asn/51155/health.svg)](https://ip-fd.net/asn/51155)

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

Routing changes

Last 30 days

2026-10-05 06:08 UTC	Neighbour gone	AS209823	peer
2026-10-05 06:08 UTC	Neighbour gone	AS49434	upstream
2026-10-05 06:08 UTC	Neighbour gone	AS35320	upstream
2026-10-05 06:08 UTC	Relationship changed	AS9009	upstream to peer
2026-10-05 06:08 UTC	Relationship changed	AS8218	upstream to peer
2026-10-05 06:08 UTC	Relationship changed	AS6204	upstream to peer
2026-10-05 06:08 UTC	Relationship changed	AS62000	upstream to peer
2026-10-05 06:08 UTC	Relationship changed	AS50629	upstream to peer
2026-10-05 06:08 UTC	New neighbour	AS49559	peer
2026-10-05 06:08 UTC	Relationship changed	AS42295	upstream to peer
2026-10-05 06:08 UTC	Relationship changed	AS264409	upstream to peer
2026-10-05 06:08 UTC	Relationship changed	AS263444	upstream to peer
2026-10-05 06:08 UTC	Relationship changed	AS201054	upstream to peer
2026-10-05 06:08 UTC	Relationship changed	AS14840	upstream to peer
2026-10-05 06:08 UTC	Relationship changed	AS137409	upstream to peer

WHOIS

aut-num:        AS51155
as-name:        TBTELECOM
org:            ORG-TTSz1-RIPE
admin-c:        MM52993-RIPE
tech-c:         MM52993-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         AS51155-MNT
created:        2010-06-09T13:24:47Z
last-modified:  2024-10-03T18:25:10Z
source:         RIPE
% 8 routing policy lines (import/export) not shown

Routing data

Updated 6 h ago

Registry record

Fetched 6 h ago 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/51155

const res = await fetch('https://ip-fd.net/api/v1/asn/51155', {
  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/51155', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/51155');
curl_setopt($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/51155", 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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