Data as of Nov 7, 2026
81.25.26.0/27
No anonymizer space · no proxy exits in 30 daysCEZNET s.r.o.
Registrations in this block
The registry's network records over this block, widest first, each under its parent.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 81.25.16.0/20 | 4,096 | CZ-CEZNET21-20060227 | CEZNET s.r.o. (ORG-TBS13-RIPE) · CZ | ALLOCATED PA | Feb 27, 2006 | dohled@ |
| └ 81.25.26.0/27 | 32 | ST-SOFTWARE-CZ | st-software s.r.o. | ASSIGNED PA | Sep 9, 2008 | dohled@ via CZ-CEZNET21-20060227 |
A contact marked “via” is the registry's: the record names none of its own, so the registry hands down its parent's.
Network & registry
Announced by
Covering announcement 81.25.24.0/21
- Prefix
- 81.25.24.0/21
- Announced by
- AS57728 CEZNET s.r.o.
- Type
- Residential
- Proxy exits
- 26
- Always-on exits
- 6
- RPKI
- RPKI valid
- Netname
- CZ-CEZNET21-20060227
- Registrant
- CEZNET s.r.o.
- RIR
- RIPE NCC
Origin network
AS57728
CZ
- Name
- CEZNET s.r.o.
- Type
- Internet provider
- Registered
- Oct 21, 2019
- Domain
- ceznet.cz
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced 81.25.24.0/21
81.25.24.0/21
Routing history
- Pattern
- Stable
- First seen
- Aug 2006
- Current origin since
- Apr 2021 · 5.6 yr
- Origin networks
- 4
- Last change of origin
- Apr 2021
Recorded history
History
- Handoffs
- 3
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 81.25.24.0/21 | AS57728 | /21 | RIPE | RPKI valid |
IRR
Route objects on 81.25.24.0/21
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS57728 | RIPE | CEZNET s.r.o. | CEZNET-MNT | Sep 16, 2025 |
Whois
Registration for this announcement
- Range
- 81.
25. 16. 0/ 20 - Netname
- CZ-CEZNET21-20060227
- Registrant
- CEZNET s.r.o.
- Registrant country
- CZ
- Organization
- CEZNET s.r.o. (ORG-TBS13-RIPE)
- Org country
- CZ
- Type
- ALLOCATED PA
- Created
- Feb 27, 2006
- Updated
- Sep 16, 2025
- Maintainer
- RIPE-NCC-HM-MNT
- RIR
- RIPE NCC
- Country
- CZ
- Delegated
- Feb 27, 2006
- Status
- assigned
Report abuse
Abuse contact
- dohled@
ceznet. cz - Name
- CEZNET hostmaster
- Handle
- CH13482-RIPE