AS number details

AS2852

CESNET z.s.p.o.  ·  cesnet.cz

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AS2852 – CESNET z.s.p.o.

Field Value
Country Czechia
Website cesnet.cz
Hosted domains 2,820
Number of IPv4 848,896
Number of IPv6 713,053,462,628,379,038,341,895,553,024
ASN type ISP
Registry ripe
Allocated 22 years ago on Jun 22, 2002
Updated a year ago on May 28, 2023
Netblock Company Num of IPs
146.102.0.0/16 Vysoka skola ekonomicka v Praze 65,536
147.228.0.0/16 Plzen 65,536
147.230.0.0/15 Liberec 131,072
147.230.0.0/16 Liberec 65,536
147.230.156.0/24 Liberec 256
147.231.0.0/16 Praha 65,536
147.251.0.0/16 Brno 65,536
147.32.0.0/15 Prague 131,072
147.32.0.0/16 Prague 65,536
147.33.0.0/16 Praha 6 65,536
158.194.0.0/16 Univerzita Palackeho 65,536
158.196.0.0/16 VSB - Technical University 65,536
160.216.0.0/15 Univerzita obrany 131,072
160.216.0.0/16 Univerzita obrany 65,536
160.217.0.0/16 University of South Bohemia 65,536
185.8.160.0/22 CESNET z.s.p.o. 1,024
193.84.116.0/23 Institute of Chemical Process Fundamentals of the CAS, v.v.i. 512
193.84.160.0/20 UJV Rez, a.s. 4,096
193.84.192.0/19 Slezska univerzita v Opave 8,192
193.84.192.0/20 Slezska univerzita v Opave 4,096
193.84.208.0/20 Slezska univerzita v Opave 4,096
193.84.32.0/20 Ceska zemedelska univerzita v Praze 4,096
193.84.53.0/24 Charles University 256
193.84.55.0/24 Charles University 256
193.84.56.0/21 Charles University 2,048
193.84.80.0/22 Prague 6 1,024
195.113.0.0/16 CESNET z.s.p.o. 65,536
195.178.64.0/19 CESNET z.s.p.o. 8,192
78.128.128.0/17 CESNET z.s.p.o. 32,768
Netblock Company
2001:718::/29 CESNET z.s.p.o.
2001:718::/32 CESNET z.s.p.o.
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WHOIS Details


ASHandle:       AS2852
OrgID:          AS2852
ASName:         AS2852
ASNumber:       AS2852
RegDate:        0000-00-00
Updated:        0000-00-00
TechHandle:     AA00-AAAA
Source:         AAAA

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Hosted Domains

There are 2,820 domain names hosted across 1,015 IP addresses on this ASN.

IP Address Domain Domains on this IP
147.251.5.234 conques.eu 142
147.251.5.239 muni.cz 107
147.231.163.211 cas.cz 64
195.113.89.35 cuni.cz 53
147.251.6.69 caver.cz 36
78.128.246.81 oesnet.cz 35
193.84.206.148 modernivyzvylidstva.cz 34
146.102.17.31 familycouncil.cz 31
195.113.187.197 diapanther.cz 30
195.113.2.17 universitakarlova.eu 29
195.113.56.9 didsciplus.cz 27
147.33.83.20 50icho.eu 27
195.178.73.178 mendelu.cz 26
147.251.145.45 eirene.cz 24
195.178.88.158 qocna.cz 22
193.84.47.105 agroprace.cz 21
147.251.147.90 mojetng.cz 21
147.251.49.45 unida.cz 21
195.113.242.181 highfivemh.com 21
195.113.148.3 fno.cz 19
195.113.27.222 kfkl.cz 19
147.231.63.10 arclib.cz 18
147.251.26.151 zdraweb.cz 18
195.113.180.205 mlp.cz 17
195.113.241.64 identifiers.cz 17
158.194.230.160 upol.cz 16
195.113.142.152 upce.cz 15
195.178.83.105 urogynekologiebrno.cz 15
193.84.47.95 spinoffer.info 14
147.33.89.75 ict-prague.eu 14
195.113.37.100 ucitelejsoutrida.cz 14
195.113.48.16 novorozenecky-screening.cz 14
195.113.57.133 gogre.com 13
193.84.47.180 culsracing.cz 13
158.194.100.85 goodlab.sk 13
147.231.38.26 prirodnihrozby.cz 13
147.32.69.181 ricaip.eu 13
147.32.4.44 casticova-fyzika.cz 13
195.113.49.4 wikiskripta.eu 12
147.251.49.10 islogin.cz 12
147.231.64.23 bylany.com 12
193.84.47.38 czu.cz 12
147.231.28.8 clustermeeting2021.eu 11
195.113.77.143 talnet.cz 11
147.231.163.247 krausivan.cz 11
146.102.16.4 vse.cz 11
147.32.160.15 ergonomickakonference.cz 11
147.251.22.179 ctlab.sk 11
147.231.201.189 interklim.de 11
195.113.166.146 vyleturaj.cz 10

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Useful for Cybersecurity

Peers

There are 256 peers for this ASN.

Peers Name
AS1031 Peer 1 Internet Service LLC
AS10906 Núcleo de Inf. e Coord. do Ponto BR - NIC.BR
AS1103 SURF B.V.
AS11284 Núcleo de Inf. e Coord. do Ponto BR - NIC.BR
AS1140 Stichting Internet Domeinregistratie Nederland
AS11644 Núcleo de Inf. e Coord. do Ponto BR - NIC.BR
AS12552 GlobalConnect AB
AS12637 SEEWEB s.r.l.
AS12741 Netia SA
AS12779 IT.Gate S.p.A.
AS12859 BIT BV
AS12969 Vodafone Iceland
AS13030 Init7 (Switzerland) Ltd.
AS13150 CATO NETWORKS LTD
AS13194 UAB "Bite Lietuva"
AS132337 Axclusive
AS13237 euNetworks GmbH
AS13335 Cloudflare, Inc.
AS137409 GSL Networks Pty LTD
AS14630 Invesco Group Services, Inc.
AS14840 BR.Digital Provider
AS14907 Wikimedia Foundation Inc.
AS15435 DELTA Fiber Nederland B.V.
AS15547 netplus.ch SA
AS15576 NTS workspace AG
AS15605 Connesi s.p.a.
AS15685 CASABLANCA INT a.s.
AS15802 Emirates Integrated Telecommunications Company PJSC
AS15830 Equinix (EMEA) Acquisition Enterprises B.V.
AS15935 ha-vel internet s.r.o.
AS15958 CETIN Ltd. Belgrade
AS16019 Vodafone Czech Republic a.s.
AS16246 Nej.cz s.r.o.
AS16509 Amazon.com, Inc.
AS16552 Tiggee LLC
AS17639 Converge ICT Solutions Inc.
AS1764 Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH
AS18106 Viewqwest Pte Ltd
AS1828 Unitas Global LLC
AS1853 ACONET
AS196762 ALKOM Security, a.s.
AS197277 State Institute for Drug Control
AS197451 Brno University of Technology
AS198605 AVAST Software s.r.o.
AS199405 Oslavany.NET, spolek
AS199524 G-Core Labs S.A.
AS199604 OLOMOUCKY KRAJ
AS199657 TNtech, s.r.o.
AS199711 National Cyber and Information Security Agency
AS199803 ComSource s.r.o.
AS199938 Netzwerge GmbH
AS200874 Liberecky kraj
AS201163 Komercni banka, a.s.
AS201594 Czech Telecommunication Office
AS201648 Plzensky kraj
AS201730 DataSpring
AS202297 Skylon Solutions Limited
AS202605 EMPECOM, s.r.o.
AS202874 Zlinsky Kraj
AS202877 VEJNET.CZ s.r.o.
AS203072 DomaTV s.r.o.
AS203165 Statni pokladna Centrum sdilenych sluzeb, s.p.
AS204384 LLC "OTT UKRAINE"
AS204772 Reditelstvi silnic a dalnic s.p.
AS204860 NetX Networks a.s.
AS20562 Broadband Hosting B.V.
AS207153 Stream-iT, s.r.o.
AS20723 AVONET, s.r.o.
AS20764 CJSC RASCOM
AS208060 Dr. Max BDC, s.r.o.
AS208093 Moravskoslezsky kraj
AS208882 Automation & Business, s.r.o.
AS20932 Services Industriels de Geneve
AS20940 Akamai International B.V.
AS20965 GEANT Vereniging
AS209719 Ministerstvo Obrany
AS210111 Netcraft Solutions s.r.o.
AS210367 Krajska zdravotni, a.s.
AS210498 Kraj Vysocina
AS2119 Telenor Norge AS
AS212483 LEVEL EIGHTY-SIX COMMUNICATIONS LTD
AS212876 Pardubicky Kraj
AS213152 Narodni bezpecnostni urad Czech Republic
AS21320 GEANT Vereniging
AS213387 TeSuNet s.r.o.
AS215582 Jan Kalista
AS215704 NGN CZ s.r.o.
AS21859 Zenlayer Inc
AS22356 Durand do Brasil Ltda
AS23106 AMERICAN TOWER DO BRASIL-COMUNICAÇÂO MULTIMÍDIA LT
AS23764 CTGNet
AS24482 SG.GS
AS24961 myLoc managed IT AG
AS25091 IP-Max SA
AS25160 Vorboss Limited
AS25192 CZ.NIC, z.s.p.o.
AS25220 equada network GmbH
AS25234 ACTIVE 24, s.r.o.
AS25248 RADIOKOMUNIKACE a.s.
AS25424 InterneXt 2000, s.r.o.
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Upstreams

There are 6 upstreams for this ASN.

upstreams Name
AS21320 GEANT Vereniging
AS2914 NTT America, Inc.
AS49025 PRO-ZETA a.s.
AS6461 Zayo Bandwidth
AS6762 TELECOM ITALIA SPARKLE S.p.A.
AS6939 Hurricane Electric LLC
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Downstreams

There are 16 downstreams for this ASN.

Downstreams Name
AS197277 State Institute for Drug Control
AS197451 Brno University of Technology
AS199604 OLOMOUCKY KRAJ
AS199711 National Cyber and Information Security Agency
AS200874 Liberecky kraj
AS201648 Plzensky kraj
AS202874 Zlinsky Kraj
AS204772 Reditelstvi silnic a dalnic s.p.
AS208093 Moravskoslezsky kraj
AS210367 Krajska zdravotni, a.s.
AS210498 Kraj Vysocina
AS212876 Pardubicky Kraj
AS213152 Narodni bezpecnostni urad Czech Republic
AS48091 Kraj Vysocina
AS51727 Doosan Skoda Power s.r.o
AS61110 Sprava informacnich technologii mesta Plzne, p.o.
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Related Networks

What is an ASN?

Autonomous System Numbers (ASNs) are assigned to entities such as Internet Service Providers and other large organizations that control blocks of IP addresses. This network page, and the organization field that's shown on the main IP address information page and also returned in the geolocation API are based on the ASN.

The ASN details will often correspond to the IP address owner, but for smaller organizations it may be that organization's parent, or their ISP. Find out more about AS2852 at robtex.

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