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Autonomous System details for AS2852

AS2852
CESNET z.s.p.o. • cesnet.cz

AS2852 — CESNET z.s.p.o.

AS Name
CESNET2
Country
Czechia (CZ)
Website
Number of IPv4
858,112
Number of IPv6
6.34 × 1029
ASN type
Education
Status
Allocated
Registry
RIPE
Allocated
June 22, 2002
Last updated
March 09, 2026

IP Ranges

26 IPv4 prefixes, 1 IPv6 prefixes
Prefix Company Number of IPs
78.128.128.0/17 CESNET z.s.p.o. 32,768
146.102.0.0/16 University of Economics, Prague 65,536
147.32.0.0/16 Ceske vysoke uceni technicke v Praze 65,536
147.33.0.0/16 Vysoka skola chemicko-technologicka v Praze 65,536
147.228.0.0/16 Zapadoceska univerzita v Plzni 65,536
147.230.0.0/16 Technicka univerzita v Liberci 65,536
147.231.0.0/16 Czech Academy of Sciences 65,536
147.251.0.0/16 Masarykova univerzita - Ustav vypocetni techniky 65,536
158.194.0.0/16 Univerzita Palackeho v Olomouci 65,536
158.196.0.0/16 Vysoka skola banska - Technicka univerzita Ostrava 65,536
160.216.0.0/16 Univerzita obrany 65,536
160.217.0.0/16 University of South Bohemia in Ceske Budejovice 65,536
185.8.160.0/22 CESNET z.s.p.o. 1,024
193.84.32.0/20 Czech University of Life Sciences Prague 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 CESNET z.s.p.o. 1,024
193.84.104.0/22 Ceske vysoke uceni technicke v Praze 1,024
193.84.116.0/23 Institute of Chemical Process Fundamentals of the ASCR, v.v.i. 512
193.84.160.0/20 UJV Rez, a.s. 4,096
193.84.192.0/19 Silesian University in Opava 8,192
193.84.192.0/20 Silesian University in Opava 4,096
193.84.208.0/20 Silesian University in Opava 4,096
195.113.0.0/16 Charles University 65,536
195.178.64.0/19 CESNET z.s.p.o. 8,192
2001:718::/29 CESNET z.s.p.o. 6.34 × 1029

IP ranges are the different blocks of IP addresses advertised by an Autonomous System (AS). These ranges can be used by the same organization operating the AS, or by different organizations.

Upstreams of AS2852

2 upstreams

AS2852 uses these Autonomous Systems as its upstreams.

An upstream (or transit provider) is another AS that AS2852 pays for full internet connectivity, allowing it to reach all global destinations and be reachable by them.

Downstreams of AS2852

18 downstreams

AS2852 provides internet connectivity to these downstream Autonomous Systems.

A downstream is a customer Autonomous System that pays another AS (its provider) for internet access. The provider AS carries the downstream's traffic and makes its network reachable.

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