Data as of Nov 7, 2026
212.4.128.0/23
5 residential-proxy exits · 30 daysO2 Czech Republic, a.s.
Residential-proxy exits
Proxy exits
5
0.98% of its addresses · 30 days
Always-on exits
1
20% of its exits
Spread
2 of 2
/24s with at least one exit
Providers
28
selling exits here
Oct 8, 2026 – Nov 6, 2026
Exits seen per day
256 observations
/24s with the most always-on exits
| /24 | Always-on exits | Proxy exits | |
|---|---|---|---|
| 212.4.129.0/24 | 1 | 3 | |
| 212.4.128.0/24 | 0 | 2 |
Proxy providers listing exits
- 2Captcha
- BirdProxies
- BottingTools
- ByteProxies
- Byteful
- CliProxy
- Decodo
- EnigmaProxy
- FastProxy
- FlashProxy
- GonzoProxy
- IPOasis
- IPPeak
- Infatica
- LemonBright
- MangoProxy
- NovaProxy
- Oxylabs
- Proxy-Seller
- ProxyEmpire
- Proxyma
- Shifter
- Thordata
- ThunderProxy
- VibeProxies
- VitalExclusive
- VitalProxy
- Webshare
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 |
|---|---|---|---|---|---|---|
| 212.4.128.0/19 | 8,192 | CZ-CZNET-20080611 | O2 Czech Republic, a.s. (ORG-STAN1-RIPE) · CZ | ALLOCATED PA | Jun 11, 2008 | abuse@ |
| └ 212.4.128.0/23 | 512 | SELFNET-CZ | Self Servis CATV Ivancice | ASSIGNED PA | Jan 12, 2009 | abuse@ via CZ-CZNET-20080611 |
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 212.4.128.0/19
- Prefix
- 212.4.128.0/19
- Announced by
- AS12570 O2 Czech Republic, a.s.
- Type
- Residential
- Proxy exits
- 87
- Always-on exits
- 12
- RPKI
- RPKI valid
- Netname
- CZ-CZNET-20080611
- Registrant
- O2 Czech Republic, a.s.
- RIR
- RIPE NCC
Origin network
AS12570
CZ
- Name
- O2 Czech Republic, a.s.
- Type
- Internet provider
- Registered
- Jul 28, 1999
- Domain
- o2.cz
- Website
- www.itself.cz/
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced 212.4.128.0/19
212.4.128.0/19
Routing history
- Pattern
- Stable
- First seen
- Jun 2008
- Current origin since
- Oct 2016 · 10 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 212.4.128.0/19 | AS12570 | /19 | RIPE | RPKI valid |
IRR
Route objects on 212.4.128.0/19
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS12570 | RIPE | ITSELF | MNET-IP-MNT | Sep 27, 2018 |
Whois
Registration for this announcement
- Range
- 212.
4. 128. 0/ 19 - Netname
- CZ-CZNET-20080611
- 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
- Jun 11, 2008
- Updated
- Jun 20, 2024
- Maintainer
- RIPE-NCC-HM-MNT
- RIR
- RIPE NCC
- Country
- CZ
- Delegated
- Jun 11, 2008
- Status
- assigned
Report abuse
Abuse contact
- abuse@
o2. cz - Name
- Abuse-C Role
- Handle
- AR14410-RIPE