AS2852 CESNET z.s.p.o. 🇨🇿 CZ
Announcing 27 prefixes, seen at the RIS collectors.
IPv4 prefixes
26
858,112 (3,352 × /24)
IPv6 prefixes
1
8 × /32
Upstreams
9
transit providers observed
Peers
25
settlement-free adjacencies
Downstreams
18
transit customers observed
Customer cone
33
ASes reachable through it
Registry and operator data
- AS number
- AS2852
- Name
- CESNET z.s.p.o.
- Organisation
- CESNET
- Country
- 🇨🇿 CZ
- RIR
- RIPENCC
- Allocated
- 1993-12-20
- Network type
- Educational/Research
- Traffic levels
- 500-1000Gbps
- Scope
- Europe
- Peering policy
- Selective
- IRR as-set
- AS2852:AS-CESNET-GOOGLE
- Website
- https://www.cesnet.cz
- Looking glass
- https://lg.cesnet.cz
- PeeringDB
- net/660
- Exchanges
- 3
RPKI coverage of this AS
Its own announcements, validated against the current ROA set
Announcement history
One point per day, recorded at each table import
IPv4
IPv6
Recorded changes
New prefixes and origin changes seen on the live stream
| When | Change | Prefix | Origin | Path |
|---|---|---|---|---|
| 2026-10-08 03:11:32Z | new prefix | 195.113.226.0/24 | AS2852 CESNET z.s.p.o. | 49134533566939606062852 |
| 2026-10-02 11:23:24Z | new prefix | 147.230.156.0/24 | AS2852 CESNET z.s.p.o. | 349271299129912993939260606606062852 |