Data as of Nov 10, 2026
83.240.76.0/23
No anonymizer space · no proxy exits in 30 daysO2 Czech Republic, a.s.
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 |
|---|---|---|---|---|---|---|
| 83.240.0.0/17 | 32,768 | CZ-CZNET-20040311 | O2 Czech Republic, a.s. (ORG-STAN1-RIPE) · CZ | ALLOCATED PA | Mar 11, 2004 | abuse@ |
| └ 83. | 32,512 | NETBOX | SMART Comp. a.s. (ORG-SCS2-RIPE) | ASSIGNED PA | Jun 17, 2008 | abuse@ |
Network & registry
Announced by
Covering announcement 83.240.0.0/17
- Prefix
- 83.240.0.0/17
- Announced by
- AS31246 O2 Czech Republic, a.s.
- Type
- Residential
- Proxy exits
- 50
- Always-on exits
- 3
- RPKI
- RPKI valid
- Netname
- CZ-CZNET-20040311
- Registrant
- O2 Czech Republic, a.s.
- RIR
- RIPE NCC
Origin network
AS31246
CZ
- Name
- O2 Czech Republic, a.s.
- Type
- Internet provider
- Registered
- Mar 30, 2004
- Domain
- netbox.cz
- Website
- www.netbox.cz
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced 83.240.0.0/17
83.240.0.0/17
Routing history
- Pattern
- Stable
- First seen
- May 2005
- Current origin since
- May 2005 · 22 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 83.240.0.0/17 | AS31246 | /17 | RIPE | RPKI valid |
IRR
Route objects on 83.240.0.0/17
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS31246 | RIPE | NETBOX | NETBOX-MNT | Nov 19, 2004 |
Whois
Registration for this announcement
- Range
- 83.
240. 0. 0/ 17 - Netname
- CZ-CZNET-20040311
- Registrant
- O2 Czech Republic, a.s.
- Registrant country
- CZ
- Organization
- O2 Czech Republic, a.s. (ORG-STAN1-RIPE)
- Org country
- CZ
- Type
- ALLOCATED PA
- Created
- Mar 11, 2004
- Updated
- Jun 20, 2024
- Maintainer
- RIPE-NCC-HM-MNT
- RIR
- RIPE NCC
- Country
- CZ
- Delegated
- Mar 11, 2004
- Status
- assigned
Report abuse
Abuse contact
- abuse@
o2. cz - Name
- Abuse-C Role
- Handle
- AR14410-RIPE