Data as of Nov 11, 2026
147.231.89.0/24
No anonymizer space · no proxy exits in 30 daysCESNET z.s.p.o. · space held by Czech Academy of Sciences
Network & registry
Announced by
Covering announcement 147.231.0.0/16
- Prefix
- 147.231.0.0/16
- Announced by
- AS2852 CESNET z.s.p.o.
- Type
- Business
- Proxy exits
- 30
- RPKI
- RPKI valid
- Netname
- CAS-TCZ
- Registrant
- Czech Academy of Sciences
- RIR
- RIPE NCC
Origin network
AS2852
CZ
- Name
- CESNET z.s.p.o.
- Type
- Education
- Registered
- Dec 20, 1993
- Domain
- cesnet.cz
- Website
- www.cesnet.cz
- Industry
- Hosting and Cloud Provider
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced 147.231.0.0/16
147.231.0.0/16
Routing history
- Pattern
- Stable
- First seen
- Mar 2024
- Current origin since
- Mar 2024 · 2.6 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 147.231.0.0/16 | AS2852 | /24 | RIPE | RPKI valid |
Whois
Registration for this announcement
- Range
- 147.
231. 0. 0/ 16 - Netname
- CAS-TCZ
- Registrant
- Czech Academy of Sciences
- Registrant country
- CZ
- Organization
- Czech Academy of Sciences (ORG-AOSO1-RIPE)
- Org country
- CZ
- Type
- LEGACY
- Created
- May 18, 2006
- Updated
- Apr 14, 2016
- Maintainer
- TENCZ-MNT
- RIR
- RIPE NCC
- Country
- CZ
- Delegated
- Nov 25, 1992
- Status
- assigned
Report abuse
Abuse contact
- abuse@
cas. cz - Name
- Akademie ved Ceske republiky Network Admins
- Handle
- AVCR1-RIPE