Data as of Nov 3, 2026
Autonomous system
AS203821
IT4 Polska Sp. z o.o.
Announces 768 addresses in 3 prefixes. None of it is anonymizer space.
Type
Internet provider
PL
Proxy activity, 30 days
84 exits
Announced prefixes
| Prefix | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|
| 91.207.184.0/24 since Jan 2016 | Residential | 2 | Sylwester Harasim | |
| 91.207.185.0/24 since Jan 2016 | Residential | 4 1 always on | Sylwester Harasim | |
| 217.28.134.0/24 since Sep 2022 | Residential | 79 15 always on | Enformatel Sp. z o.o. |
Residential-proxy exposure
Always-on exits
16
19% of its exits
Spread
3
/24s with at least one exit
Providers
80
selling exits here
/24s with the most always-on exits
| /24 | Always-on exits | Proxy exits | |
|---|---|---|---|
| 217.28.134.0/24 | 15 | 79 | |
| 91.207.185.0/24 | 1 | 4 | |
| 91.207.184.0/24 | 0 | 2 |
Proxy providers listing exits
- 2Captcha
- 2Extract
- 711Proxy
- Ake.net
- AnyIP
- B2Proxy
- BirdProxies
- BlurPath
- BottingTools
- Bright Data
- BuyingProxy
- ByteProxies
- Byteful
- CatProxies
- CliProxy
- CoreProxy
- DataImpulse
- Datarama
- Decodo
- EZProxies
- EnigmaProxy
- Evomi
- FastProxy
- FlashProxy
- FlexyProxies
- FloppyData
- GSocks
- Geonix
- Geonode
- GloryCloud
- GoProxies
- GonzoProxy
- IPCola
- IPFly
- IPOasis
- IPPeak
- IPRoyal
- Infatica
- InfiniteProxies
- KindProxy
- KocerRoxy
- Kookey
- LemonBright
- LemonLabs
- LightningProxies
- LudaxProxy
- MagneticProxy
- MangoProxy
- Maskify
- MoMoProxy
- NextProxy
- NodeMaven
- NodeProxy
- NovaProxy
- Novada
- Oxylabs
- PrivateByte
- Proxiware
- Proxy-Seller
- Proxy4U
- ProxyEmpire
- ProxyGeo
- ProxyRack
- ProxyWing
- Proxying
- Proxyma
- PuraRoute
- RainProxy
- RapidProxy
- RoamProxy
- Shifter
- StrikeProxy
- SwiftProxy
- Thordata
- ThunderProxy
- VantageProxies
- VibeProxies
- VitalExclusive
- VitalProxy
- Webshare
Proxy activity
Oct 4, 2026 – Nov 2, 2026
AS203821, day by day
38K observations
Network & history
Profile
- Registered
- Oct 23, 2015
- Domain
- it4polska.pl
- Website
- www.it4polska.pl
- Industry
- Internet Service Provider (ISP)
Routing patterns
How its announcements have moved
Arrivals