Data as of Nov 8, 2026
81.90.173.0/24
30 residential-proxy exits · 30 daysO2 Czech Republic, a.s.
Residential-proxy exits
Proxy exits
30
12% of its addresses · 30 days
Always-on exits
4
13% of its exits
Providers
47
selling exits here
Oct 9, 2026 – Nov 7, 2026
Exits seen per day
2.4K observations
Proxy providers listing exits
- 2Captcha
- Ake.net
- AnyIP
- BirdProxies
- BottingTools
- ByteProxies
- Byteful
- CliProxy
- Decodo
- EnigmaProxy
- FastProxy
- FlashProxy
- GSocks
- Geonix
- GloryCloud
- GonzoProxy
- HydraProxy
- IPFly
- IPOasis
- Infatica
- LemonBright
- LemonLabs
- LightningProxies
- MangoProxy
- NodeProxy
- NovaProxy
- Novada
- Oxylabs
- Proxiware
- Proxy-Seller
- ProxyEmpire
- ProxyHat
- ProxyStyler
- ProxyWing
- Proxyma
- RainProxy
- RapidProxy
- Shifter
- StrikeProxy
- Thordata
- ThunderProxy
- VantageProxies
- VibeProxies
- VitalData
- VitalExclusive
- VitalProxy
- Webshare
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 81.90.168.0/21 since Aug 2025 | AS5610 | Residential | 47 6 always on | O2 Czech Republic, a.s. | |
| 81.90.160.0/20 since Nov 2016 | AS5610 | Residential | 47 6 always on | O2 Czech Republic, a.s. |
Registrations in this block
The registry's network records over the announcement: those covering it, widest first, then every record inside it, under its parent.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 81.90.160.0/20 | 4,096 | CZ-CZNET-20020704 | O2 Czech Republic, a.s. (ORG-STAN1-RIPE) · CZ | ALLOCATED PA | Nov 14, 2017 | abuse@ |
| └ 81.90.173.0/25 | 128 | ELSATNET-CZ | Elsat spol. s r.o. | ASSIGNED PA | Jun 14, 2004 | abuse@ via CZ-CZNET-20020704 |
| └ 81.90.173.128/26 | 64 | ELSATNET-CZ | Elsat spol. s r.o. | ASSIGNED PA | Nov 11, 2004 | abuse@ via CZ-CZNET-20020704 |
| └ 81.90.173.192/26 | 64 | CZ-KNIZEK | Jiri Knizek - PC SERVIS PCKB | ASSIGNED PA | Jan 27, 2005 | abuse@ via CZ-CZNET-20020704 |
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
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- Jun 2016
- Current origin since
- Jun 2016 · 10 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 81.90.173.0/24 | AS5610 | /24 | RIPE | RPKI valid |
| 81.90.168.0/21 | AS5610 | /21 | RIPE | Too specific |
| 81.90.160.0/20 | AS5610 | /20 | RIPE | Too specific |
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS5610 | RIPE | ELSAT, s.r.o. (InternetHome prefix) | AS5610-MTN | Apr 24, 2017 |
Whois
Registration for this announcement
- Range
- 81.
90. 160. 0/ 20 - Netname
- CZ-CZNET-20020704
- 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
- Nov 14, 2017
- Updated
- Dec 18, 2018
- Maintainer
- RIPE-NCC-HM-MNT
- RIR
- RIPE NCC
- Country
- CZ
- Delegated
- Jul 4, 2002
- Status
- assigned
Report abuse
Abuse contact
- abuse@
o2. cz - Name
- Abuse-C Role
- Handle
- AR14410-RIPE