AS2852 — CESNET2

Network type: education

AS2852 announces 21 IPv4 prefixes covering 849,920 addresses and 1 IPv6 prefixes.

About this network

The Czech national research and education network (CESNET2), the production backbone operated by the CESNET association of universities and the Czech Academy of Sciences.

What it's used for

• Linking Czech universities, research institutes, and other member institutions to each other and to the international R&E internet.

Notable

• An institutional NREN, not a commercial ISP. Connected to the pan-European GÉANT network.

Interesting

• CESNET2 is the second-generation backbone name; the network dates to the early 1990s, matching its low RIPE-era AS number.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 78.128.128.0/17
• 146.102.0.0/16
• 147.32.0.0/15
• 147.228.0.0/16
• 147.230.0.0/15
• 147.251.0.0/16
• 158.194.0.0/16
• 158.196.0.0/16
• 160.216.0.0/15
• 185.8.160.0/22
• 193.84.32.0/20
• 193.84.53.0/24
• 193.84.55.0/24
• 193.84.56.0/21
• 193.84.80.0/22
• 193.84.104.0/22
• 193.84.116.0/23
• 193.84.160.0/20
• 193.84.192.0/19
• 195.113.0.0/16
• 195.178.64.0/19
• 2001:718::/29

Upstream networks

• AS174 Cogent Communications, LLC
• AS21320 GEANT Vereniging
• AS6939 Hurricane Electric LLC
• AS20965 GEANT Vereniging
• AS1853 ACONET
• AS34549 meerfarbig GmbH & Co. KG
• AS60606 PRO-ZETA a.s.
• AS6461 Zayo Bandwidth
• AS3333 Reseaux IP Europeens Network Coordination Centre (RIPE NCC)
• AS50300 CustodianDC Limited
• AS24482 SG.GS
• AS29504 Freenet Liberec, z.s.
• AS48362 Stadtwerke Feldkirch
• AS50673 Serverius Holding B.V.
• AS20485 Joint Stock Company TransTeleCom
• AS48185 team.blue NV
• AS57463 NetIX Communications JSC
• AS37100 SEACOM Limited
• AS37721 Virtual Technologies & Solutions
• AS20766 Association "Gitoyen"
• AS34927 iFog GmbH
• AS17639 Converge ICT Solutions Inc.
• AS213241 TECHIT.BE SRL
• AS29632 Netassist International EOOD
• AS12552 GlobalConnect AB

Downstream networks

• AS208093 Moravskoslezsky kraj
• AS197451 Brno University of Technology
• AS48091 Kraj Vysocina
• AS197277 State Institute for Drug Control
• AS199711 National Cyber and Information Security Agency
• AS201648 Plzensky kraj
• AS213152 Narodni bezpecnostni urad Czech Republic
• AS61110 Sprava informacnich technologii mesta Plzne, p.o.
• AS2607 Zdruzenie pouzivatelov Slovenskej akademickej datovej siete SANET
• AS200874 Liberecky kraj
• AS202874 Zlinsky Kraj
• AS212876 Pardubicky Kraj
• AS210498 Kraj Vysocina
• AS210367 Krajska zdravotni, a.s.
• AS51727 Doosan Skoda Power s.r.o
• AS204772 Reditelstvi silnic a dalnic s.p.
• AS198500 Ustav vypocetni techniky
• AS1853 ACONET
• AS199604 OLOMOUCKY KRAJ

Adjacent networks

• AS6939 Hurricane Electric LLC
• AS174 Cogent Communications, LLC
• AS21320 GEANT Vereniging
• AS1853 ACONET
• AS20965 GEANT Vereniging
• AS208093 Moravskoslezsky kraj
• AS197451 Brno University of Technology
• AS48091 Kraj Vysocina
• AS197277 State Institute for Drug Control
• AS29504 Freenet Liberec, z.s.
• AS199711 National Cyber and Information Security Agency
• AS24482 SG.GS
• AS34549 meerfarbig GmbH & Co. KG
• AS201648 Plzensky kraj
• AS60606 PRO-ZETA a.s.
• AS213152 Narodni bezpecnostni urad Czech Republic
• AS2607 Zdruzenie pouzivatelov Slovenskej akademickej datovej siete SANET
• AS61110 Sprava informacnich technologii mesta Plzne, p.o.
• AS202874 Zlinsky Kraj
• AS212876 Pardubicky Kraj
• AS200874 Liberecky kraj
• AS210498 Kraj Vysocina
• AS6461 Zayo Bandwidth
• AS57463 NetIX Communications JSC
• AS210367 Krajska zdravotni, a.s.

Internet exchanges

• DE-CIX Frankfurt — Frankfurt, Germany
• AMS-IX Amsterdam — Amsterdam, Netherlands
• NIX.CZ - Neutral Internet eXchange for the Czech Republic — Prague, Czech Republic