asn.dev

Autonomous system

AS2852 CESNET2

Education RIPE

IPv4 addresses 850K 21 prefixes
IPv6 prefixes 1 counted as prefixes, not addresses
Countries 1 mostly CZ
Flagged prefixes 0 none

Summary

CESNET (Czech Research and Education Network)

Czech Republic · AI-generated

education research legacy

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. Source, and how to suggest an edit.

Address space

Summary

Full explorer
CountryNamePrefixes
CZCzechia22

Registry

Allocation record

via RIPE RDAP
Registry
RIPE
Handle
AS2852
Registry name
CESNET2
Registrant
AS2852-MNT
Abuse contact
abuse@cesnet.cz
Registered
2002-06-22
Last changed
2026-07-17
Status
active

Reputation

Classification and threat

Education University, school or national research and education network.

No IC3 indicators Nothing from the FBI IC3 feed.

Threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.

Elsewhere

Cross-check