AS28725 CETIN a.s.

Czechia CETIN-AS RIPE 9 IPv4 prefixes 2 IPv6 prefixes

IPv4 addresses

134,400

IPv6 /48 networks

589,824

RPKI

10 valid1 no ROA

Peers and downstreams

224

Holder

AS name: CETIN-AS
Description: CETIN a.s.
Organisation: CETIN a.s.
Abuse contact: abuse@cetin.cz
Assigned: 2003-02-09
Registered: 2003-02-10
Record last changed: 2020-03-24 14:41 UTC

136.238.226.0/24 185.218.92.0/23 194.147.12.0/22 194.50.64.0/22 212.96.180.0/24 80.78.150.0/24 85.162.0.0/15 85.162.0.0/16 85.163.0.0/16

AS553	Belwue BELWUE
AS559	SWITCH Switch
AS680	Verein zur Foerderung eines Deutschen Forschungsnetzes e.V. DFN
AS1031	PEER 1031 LLC PEER1-1031
AS1103	SURF B.V. SURFNET-NL
AS1140	Stichting Internet Domeinregistratie Nederland SIDN
AS1267	WIND TRE S.P.A. ASN-WINDTRE
AS1764	Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH NEXTLAYER-AS
AS1828	Unitas Global UNITAS
AS1836	green.ch AG GREEN
AS3170	VeloxServ Communications Ltd VELOXSERV
AS3212	Telemach Slovenija d.o.o. TELEMACH
AS3214	xTom GmbH XTOM
AS3333	Reseaux IP Europeens Network Coordination Centre (RIPE NCC) RIPE-NCC-AS
AS3741	Dimension Data
AS4230	CLARO S.A. AS4230
AS4455	IX Reach Ltd BSO
AS5405	Inter.link GmbH INTERDOTLINK
AS6057	Administracion Nacional de Telecomunicaciones AS6057
AS6204	TMRC GROUP SRL ZET-NET
AS6424	EDGOO NETWORKS UNIPESSOAL LDA EDGOO
AS6461	Zayo Bandwidth ZAYO-6461
AS6663	Euroweb Romania S.R.L. TTI-NET
AS6695	DE-CIX Management GmbH DECIX-AS
AS6777	Amsterdam Internet Exchange B.V. AMS-IX-RS
AS6797	GlobalConnect AB GLOBALCONNECT-NET
AS6881	NIX.CZ z.s.p.o. NIXCZ
AS6894	KDDI Europe Ltd KDDI-EUROPE
AS7195	EDGEUNO S.A.S AS7195
AS7713	PT Telekomunikasi Indonesia telkomnet-as-ap
AS8218	Zayo Infrastructure France SA NEO-ASN
AS8298	IPng Networks GmbH IPNG
AS8359	MTS PJSC MTS
AS8529	Zain Omantel International FZ-LLC OMANTEL-AS
AS8758	Iway AG IWAY
AS8888	xTom Pty Ltd XTOM
AS9009	M247 Europe SRL M247
AS9044	BSE Software GmbH SOLNET
AS12637	SEEWEB s.r.l. SEEWEB
AS12779	IT.Gate S.p.A. ITGATE
AS12859	BIT BV NL-BIT
AS12969	Ljosleidarinn ehf Vodafone_Iceland
AS13237	euNetworks GmbH LAMBDANET-AS
AS14630	Invesco Group Services, Inc. INVESCO
AS14840	BR.Digital Telecom AS14840
AS14907	Wikimedia Foundation Inc. WIKIMEDIA
AS15547	netplus.ch SA NETPLUS
AS15576	NTS workspace AG NTS
AS15605	Connesi s.p.a. CONNESI
AS15802	Emirates Integrated Telecommunications Company PJSC DU-AS1
AS15935	ha-vel internet s.r.o. HA-VEL-LOCAL-AS
AS16347	ADISTA SAS INHERENT
AS17557	Pakistan Telecommunication Company Limited PKTELECOM-AS-PK
AS17639	Converge ICT Solutions Inc. CONVERGE-AS
AS18106	Viewqwest Pte Ltd VIEWQWEST-SG-AP
AS19637	Avago Technologies U.S. Inc. AVG19637
AS20485	Joint Stock Company TransTeleCom TRANSTELECOM
AS20562	Broadband Hosting B.V. OPEN-PEERING-AS
AS20764	CJSC RASCOM RASCOM-AS
AS20766	Association "Gitoyen" GITOYEN-MAIN-AS
AS20932	Services Industriels de Geneve SIG-ST
AS21412	UAB "Cgates" CGATES-AS
AS24482	SG.GS SGGS-AS-AP
AS24641	FASTER CZ spol. s r.o. FASTER-AS
AS24889	Monzoon Networks AG MONZOON-AS
AS24961	WIIT AG MYLOC-AS
AS25160	Vorboss Limited VORBOSS
AS25220	equada network GmbH GLOBALNOC-AS
AS28716	Retelit Digital Services S.p.A. RETELIT-AS
AS28792	Public Internet Ltd PUBLIC-INTERNET
AS28917	Fiord Networks, UAB Fiord-AS
AS29075	IELO-LIAZO SERVICES SAS IELO
AS29140	Hostserver GmbH HOSTSERVER-AS
AS29298	SUSE Software Solutions Germany GmbH SUSE
AS29504	Freenet Liberec, z.s. LBCFREE
AS29632	Netassist International EOOD NASSIST-AS
AS29691	Nine Internet Solutions AG NINE
AS30781	Free Pro SAS JAGUAR-AS
AS31122	Digiweb ltd DIGIWEB-AS
AS31510	Innsbrucker Kommunalbetriebe AG IKB-AS
AS31742	Sota Solutions Ltd. SOTACONNECT
AS33891	Core-Backbone GmbH CORE-BACKBONE
AS34177	Celeste SAS CELESTE-AS
AS34288	Kantonsschule Zug AS34288
AS35046	OMEGA plus Chrudim s.r.o. OMEGAPLUS-AS
AS35266	EX Networks Limited EXN-AS
AS35280	F5 Networks SARL F5
AS35360	Gargunet GARGUNET
AS35369	LINZ STROM GAS WAERME GmbH fuer Energiedienstleistungen und Telekommunikation LINZAG-TELEKOM-AS
AS35598	INETCOM CARRIER LLC INETCOM
AS35613	FASTER CZ spol. s r.o. NETDATACOMM
AS35710	weber.digital GmbH WEBERCLOUD
AS36236	NetActuate, Inc NETACTUATE
AS37100	SEACOM Limited
AS37468	Angola Cables
AS37497	Network Platforms (PTY) LTD
AS37680	Cool Ideas Service Provider (Pty) Ltd
AS37721	Virtual Technologies & Solutions
AS39122	Blacknight Internet Solutions Limited BLACKNIGHT-AS
AS39249	Netassist International EOOD KICUA-AS
AS39351	31173 Services AB ESAB-AS
AS39686	Eurofiber Nederland BV AS-EUROFIBER
AS40994	Hohl IT e.U. Alwyzon
AS41327	Fiber Telecom S.p.A. FIBERTELECOM-AS
AS42473	Anexia Cloud Solutions GmbH AS-ANEXIA
AS42541	Fiberby ApS FIBERBY
AS44901	Belcloud LTD belcloud
AS45489	Sri Lanka Telecom PLC, GLobal Peering SLT-GLOBAL
AS47147	Anexia Cloud Solutions GmbH AS-ANX
AS47692	Nessus GmbH NESSUS
AS47868	AVONET, s.r.o. SUPRO-AS
AS48070	DSM (GB) Limited DSM
AS48185	team.blue NV team_blue
AS48362	Tkswf TKSWF-AS
AS48364	Pe3ny Net s.r.o. ACVYSKOV-AS
AS48919	UACITY Ltd. UA-CITY-AS
AS49544	i3D.net B.V i3Dnet
AS49605	Digital Telecommunication Services S.r.l. DTS-AS
AS50300	CustodianDC Limited CUSTDC
AS50629	LWLcom GmbH LWLCOM
AS50673	Serverius Holding B.V. Serverius-as
AS50763	Robert McKay MCKAYCOM
AS50784	Intraweb servis s.r.o. intraweb
AS51184	Fonira Telekom GmbH FONIRA
AS51185	MainStreaming SpA MAINSTREAMING-AS
AS51382	Ing. Leos Janouch COMANET-NETWORK
AS51420	cyrilek.net z.s. CYRILEK-AS
AS51873	Arcade Solutions AG AS-ARCADE
AS52029	Palanet s.r.o. ASNOVOSEDLY
AS56427	Michal Hradil ASHRADIL
AS56566	SATT a.s. SATT-AS
AS56655	Gigahost AS GIGAHOST
AS56662	Eutpnet EUTPNET
AS56987	ABACLOUDA SAS AS-ABACLOUDA
AS57288	StaMPi, spol. s r.o. ASSTAMPI
AS57294	Internet Expert s.r.o. Internet_Expert_CZ
AS57560	XLNET s.r.o. ASXLNET
AS57777	Jeroen Massar MASSAR
AS57825	MoravanyNET s.r.o. MoravanyNET-AS
AS58057	Securebit AG SECUREBIT
AS58299	Openfactory GmbH OPENFACTORY-AS
AS59890	Kabel-TV Lampert GmbH & Co KG Kabel-TV-Lampert
AS60171	AFR-IX TELECOM S.A. AFRIX-AS
AS61573	IP TELECOM AS61573
AS62167	Tismi BV Tismi
AS62275	S.R.L. NHM NHM
AS64475	Freifunk Frankfurt am Main e.V. FREIFUNK-FRANKFURT
AS137409	GSL Networks Pty LTD GSLNETWORKS-AS-AP
AS142271	EWS DS Networks Inc DOUBLESQUARE-AS-AP
AS196849	MO BYRTUS s.r.o. ASBARTYSOVA
AS196952	BEZVANET s.r.o. ASBEZVANET
AS197083	K2 atmitec s.r.o. K2ATMITEC
AS197565	NHK Solutions s.r.o. ASDIGISERVICE
AS198150	SIACOM JSC SIACOM-AS
AS198248	Cservis ASCSERVIS
AS198249	Ops One AG OPSONE
AS198346	NETFORMS s.r.o. NETFORMS-AS
AS198385	AlpineDC SA AlpineDC
AS199524	G-Core Labs S.A. GCORE
AS199938	Netzwerge GmbH NETZWERGE
AS201265	ANAFRA a.s. ANAFRA-AS
AS202297	Skylon Solutions Limited SKYLON
AS203365	Optet network, s. r. o. OPTETNETWORK
AS203645	Jan Ryznar RYZNAR-AS
AS204351	NAM system, a.s. NAM
AS205103	Telegraph42 Management GmbH TELEGRAPH-AS
AS205112	PHILUNET GmbH PHILUNET
AS205619	Vesnet ASVESNET
AS206177	SitePark s.r.o. sitepark
AS206356	Freifunk Essen e.V. Freifunk-Essen
AS206438	MX-NET Telekomunikace s.r.o. MXNET-AS
AS207841	Inferno Communications Ltd INFERNO
AS209823	Enki Multimedia EURL ENKI-AS
AS209947	M-wifi internet s.r.o. mwifi
AS210937	Showfom
AS211826	Stability for Integrated Server Hosting Ltd ISTQSERVERS-AS
AS212024	Risson RISSON
AS212483	LEVEL EIGHTY-SIX COMMUNICATIONS LTD level86
AS212635	Jurrian van Iersel AS212635
AS212859	KXCOMM s.r.o. KronosNet
AS212975	TeamCity s.r.o. TEAMCITY-AS
AS213151	Christian Elsen CHRISELSEN
AS213241	TECHIT.BE SRL TECHIT
AS213559	MyOffice, s.r.o. asmybv1
AS215638	Cilix Limited AS-CILIX-LIMITED
AS263152	MIGO TELECOM AS263152
AS264479	Turbozone Internet AS264479
AS271253	LINK BRASIL TELECOMUNICACOES LTDA AS271253

Upstream graph

Upstreams and their upstreams, from BGP paths

Network health

Grade B · 83/100

partly	Prefixes covered by valid ROAs 10 of 11 announced prefixes are RPKI valid, 1 have no ROA.	23/25
pass	No RPKI invalid announcements None of the announcements is RPKI invalid.	10/10
pass	Announces IPv6 2 IPv6 prefixes.	15/15
pass	More than one upstream 12 upstreams seen in BGP.	10/10
pass	Working abuse contact abuse@cetin.cz 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 2020-03-24.	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/28725"><img src="https://ip-fd.net/badge/asn/28725/health.svg" alt="AS28725 network health on IP-FD.net"></a>

Markdown

[![AS28725 network health](https://ip-fd.net/badge/asn/28725/health.svg)](https://ip-fd.net/asn/28725)

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

Routing changes

Last 30 days

2026-10-04 19:13 UTC	Neighbour gone	AS264409	upstream
2026-10-04 19:13 UTC	Neighbour gone	AS202657	downstream
2026-10-04 19:13 UTC	Neighbour gone	AS52320	peer
2026-10-04 19:13 UTC	Neighbour gone	AS37282	upstream
2026-10-04 19:13 UTC	Neighbour gone	AS31027	peer
2026-10-04 19:13 UTC	Neighbour gone	AS22356	upstream
2026-10-04 19:13 UTC	Neighbour gone	AS4601	upstream
2026-10-04 19:13 UTC	New neighbour	AS8888	peer
2026-10-04 19:13 UTC	New neighbour	AS264479	peer
2026-10-04 19:13 UTC	New neighbour	AS197083	peer
2026-10-04 19:13 UTC	Relationship changed	AS9044	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS9009	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS8758	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS8359	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS8298	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS8218	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS7713	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS7195	upstream to peer
2026-10-04 19:13 UTC	New neighbour	AS6797	peer
2026-10-04 19:13 UTC	Relationship changed	AS6777	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS6695	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS6663	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS6461	upstream to peer
2026-10-04 19:13 UTC	New neighbour	AS62275	peer
2026-10-04 19:13 UTC	Relationship changed	AS6204	upstream to peer
2026-10-04 19:13 UTC	New neighbour	AS6057	peer
2026-10-04 19:13 UTC	Relationship changed	AS60171	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS56655	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS5405	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS50673	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS50629	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS48362	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS47147	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS4455	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS4230	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS41327	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS39686	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS39351	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS39249	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS37497	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS37468	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS3741	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS37100	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS35280	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS34177	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS33891	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS30781	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS29691	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS29632	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS29075	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS28716	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS24961	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS24889	upstream to peer
2026-10-04 19:13 UTC	New neighbour	AS215638	peer
2026-10-04 19:13 UTC	Relationship changed	AS212024	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS20766	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS20764	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS20562	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS205103	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS20485	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS1836	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS1764	upstream to peer
2026-10-04 19:13 UTC	New neighbour	AS17557	peer
2026-10-04 19:13 UTC	Relationship changed	AS15935	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS15802	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS15576	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS14840	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS137409	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS12779	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS1267	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS12637	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS1103	upstream to peer
2026-10-04 19:13 UTC	Relationship changed	AS1031	upstream to peer

WHOIS

aut-num:        AS28725
as-name:        CETIN-AS
org:            ORG-EPss1-RIPE
admin-c:        CTN100-RIPE
tech-c:         CTN100-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         CETIN-MNT
created:        2003-02-10T09:01:35Z
last-modified:  2020-03-24T14:41:10Z
source:         RIPE
export-via:     AS6777 to AS-ANY announce AS-CETIN
import-via:     AS6777 from AS-ANY accept ANY

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/28725

const res = await fetch('https://ip-fd.net/api/v1/asn/28725', {
  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/28725', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/28725');
curl_setopt($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/28725", 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.

AS174
AS1299	Arelion Sweden AB TWELVE99
AS6939	Hurricane Electric LLC HURRICANE
AS9002	RETN Limited RETN-AS
AS13030	Init7 (Switzerland) Ltd. INIT7
AS25091	IP-Max SA IP-Max
AS31230	Slovak University of Technology in Bratislava SIX-ROUTE-SERVERS
AS34019	Hivane Association HIVANE
AS34549	meerfarbig GmbH & Co. KG MEER-AS
AS34927	iFog GmbH iFog-GmbH
AS35625	Eurofiber France SAS EUROFIBER-FRANCE
AS50304	Blix Solutions AS BLIX

AS10122	NETSTAR (SG) PTE. LTD. NETSTAR-AS-AP
AS19637	Avago Technologies U.S. Inc. AVG19637
AS24641	FASTER CZ spol. s r.o. FASTER-AS
AS29298	SUSE Software Solutions Germany GmbH SUSE
AS35046	OMEGA plus Chrudim s.r.o. OMEGAPLUS-AS
AS35613	FASTER CZ spol. s r.o. NETDATACOMM
AS47868	AVONET, s.r.o. SUPRO-AS
AS48364	Pe3ny Net s.r.o. ACVYSKOV-AS
AS50784	Intraweb servis s.r.o. intraweb
AS51382	Ing. Leos Janouch COMANET-NETWORK
AS51420	cyrilek.net z.s. CYRILEK-AS
AS52029	Palanet s.r.o. ASNOVOSEDLY
AS56427	Michal Hradil ASHRADIL
AS56566	SATT a.s. SATT-AS
AS57288	StaMPi, spol. s r.o. ASSTAMPI
AS57294	Internet Expert s.r.o. Internet_Expert_CZ
AS57560	XLNET s.r.o. ASXLNET
AS57825	MoravanyNET s.r.o. MoravanyNET-AS
AS196849	MO BYRTUS s.r.o. ASBARTYSOVA
AS196952	BEZVANET s.r.o. ASBEZVANET
AS197083	K2 atmitec s.r.o. K2ATMITEC
AS197565	NHK Solutions s.r.o. ASDIGISERVICE
AS198248	Cservis ASCSERVIS
AS198346	NETFORMS s.r.o. NETFORMS-AS
AS201265	ANAFRA a.s. ANAFRA-AS
AS203365	Optet network, s. r. o. OPTETNETWORK
AS203645	Jan Ryznar RYZNAR-AS
AS204351	NAM system, a.s. NAM
AS205619	Vesnet ASVESNET
AS206177	SitePark s.r.o. sitepark
AS206438	MX-NET Telekomunikace s.r.o. MXNET-AS
AS209947	M-wifi internet s.r.o. mwifi
AS211826	Stability for Integrated Server Hosting Ltd ISTQSERVERS-AS
AS212859	KXCOMM s.r.o. KronosNet
AS212975	TeamCity s.r.o. TEAMCITY-AS
AS213559	MyOffice, s.r.o. asmybv1