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Data as of Nov 7, 2026

212.4.128.0/19

87 residential-proxy exits · 30 days

O2 Czech Republic, a.s.

Announcement
this exact prefix
RPKI valid
Announced by
AS12570
Type
Residential
90% of it

Residential-proxy exits

Proxy exits
87
1.1% of its addresses · 30 days
Always-on exits
12
14% of its exits
Spread
20 of 32
/24s with at least one exit
Providers
78
selling exits here
Oct 8, 2026 – Nov 6, 2026

Exits seen per day

28K observations
  • Residential
  • Business

/24s with the most always-on exits

/24Always-on exitsProxy exits
212.4.132.0/2426
212.4.142.0/2425
212.4.152.0/2424
212.4.155.0/24118
212.4.133.0/2419
212.4.144.0/2419
212.4.138.0/2418
212.4.129.0/2413
212.4.130.0/2412
212.4.143.0/2404
212.4.137.0/2403
212.4.156.0/2403
212.4.136.0/2402
212.4.128.0/2402
212.4.148.0/2402
212.4.150.0/2402
212.4.157.0/2402
212.4.134.0/2401
212.4.154.0/2401
212.4.158.0/2401

Proxy providers listing exits

  • 2Captcha
  • 711Proxy
  • Ake.net
  • AnyIP
  • B2Proxy
  • BartProxies
  • BirdProxies
  • BottingTools
  • Bright Data
  • BuyingProxy
  • ByteProxies
  • Byteful
  • CliProxy
  • DataImpulse
  • Decodo
  • EVOPROXY
  • EZProxies
  • EnigmaProxy
  • Evomi
  • FastProxy
  • FlashProxy
  • GSocks
  • GeekProxy
  • Geonix
  • Geonode
  • GloryCloud
  • GoProxies
  • GonzoProxy
  • HydraProxy
  • IPFly
  • IPOasis
  • IPPeak
  • IPRoyal
  • Infatica
  • InfiniteProxies
  • LemonBright
  • LightningProxies
  • MagneticProxy
  • MangoProxy
  • MarsProxies
  • Maskify
  • NodeMaven
  • NodeProxy
  • NovProxy
  • NovaProxy
  • Novada
  • Oxylabs
  • PSBProxy
  • PrivateByte
  • Proxiware
  • Proxmint
  • Proxy-Seller
  • Proxy4U
  • ProxyEmpire
  • ProxyHat
  • ProxyRack
  • ProxyWing
  • Proxyma
  • PuraRoute
  • Q2IP
  • RH7Proxy
  • RainProxy
  • Shifter
  • SpyderProxy
  • StrikeProxy
  • SwiftProxy
  • Thordata
  • ThunderProxy
  • TrustProxy
  • VProxy
  • VantageProxies
  • VibeProxies
  • VitalData
  • VitalExclusive
  • VitalProxy
  • Webshare
  • YumiProxy
  • ZENPROXY_PREMIUM

Announcements

More specific

Announcements inside

PrefixOriginTypeProxy exitsHolderRPKI
212.4.132.0/24
since Jan 2022
AS51424Residential6
2 always on
O2 Czech Republic, a.s.
212.4.142.0/23
since Jun 2025
AS56566Residential9
2 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.

RangeAddressesNetnameHolderTypeCreatedAbuse contact
212.4.128.0/198,192CZ-CZNET-20080611O2 Czech Republic, a.s. (ORG-STAN1-RIPE) · CZALLOCATED PAJun 11, 2008abuse@o2.cz
└ 212.4.128.0/23512SELFNET-CZSelf Servis CATV IvanciceASSIGNED PAJan 12, 2009abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.130.0/23512SELFNET-CZSelf Servis CATV ZidlochoviceASSIGNED PAJan 12, 2009abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.132.0/24256SPERLNET-CZSPERLNET s.r.o.ASSIGNED PAJan 12, 2009abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.133.0/24256PRIBYSLAV-CZMesto PribyslavASSIGNED PAJan 12, 2009abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.134.0/23512SELFNET-CZSelf Servis CATV IvanciceASSIGNED PANov 14, 2011abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.136.0/2664XACTIXactiASSIGNED PAOct 25, 2012abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.136.64/2816OHRADAVelka OhradaASSIGNED PAOct 25, 2012abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.136.80/298HOSTINGBiT ManagerASSIGNED PAOct 25, 2012abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.136.88/304SELFNET-CZSlovanetASSIGNED PAOct 25, 2012abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.136.92/304SELFNET-CZTPMCASSIGNED PAOct 25, 2012abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.136.96/2732SELFNET-CZIvanciceASSIGNED PAOct 25, 2012abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.136.128/2664HOSTINGServerhosting BrnoASSIGNED PAOct 25, 2012abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.136.192/2664GONET-CZIP Address range for Rysavka GONETASSIGNED PAOct 25, 2012abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.137.0/24256VIDEONNetworking s.r.o.ASSIGNED PAJan 12, 2009abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.138.32/2816SELFNET-CZSelf Servis Ltd.ASSIGNED PAOct 25, 2012abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.138.48/2816AVG-CZAVG Technologies CZ, s.r.o.ASSIGNED PAJan 12, 2009abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.138.64/2816LANSERVISLANservis s.r.o., PrerovASSIGNED PAJan 12, 2009abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.138.80/298SELFNET-CZSelf Servis Ltd.ASSIGNED PAOct 30, 2012abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.138.104/304SELFNET-CZSelf Servis Ltd.ASSIGNED PAOct 25, 2012abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.138.108/304SELFNET-CZSelf Servis Ltd.ASSIGNED PAOct 25, 2012abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.138.112/2816TISNOV-CZMU TisnovASSIGNED PAOct 25, 2012abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.138.128/2664ENECOSNETunknownASSIGNED PAJun 19, 2009abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.138.192/2732SELFNET-CZSelf Servis Ltd.ASSIGNED PAOct 25, 2012abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.138.224/2732FTTx_TisnovunknownASSIGNED PAJun 19, 2009abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.142.0/23512SATTNETSATT a.s.ASSIGNED PAJan 12, 2009abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.144.0/24256FCOM-CZNova Ves u NMnMASSIGNED PAOct 24, 2012abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.146.0/24256LANSERVISLANservis s.r.o., PrerovASSIGNED PAJun 12, 2009abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.148.0/23512SELFNET-CZSelf Servis CATV KyjovASSIGNED PAJun 12, 2009abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.150.0/23512SELFNET-CZSelf Servis CATV IvanciceASSIGNED PAJun 12, 2009abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.152.0 - 212.4.152.2324SELFNET-CZSelf Servis Ltd.ASSIGNED PAOct 30, 2012abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.152.24/298SALAMOUNA-CZSalamouna.cz s.r.o.ASSIGNED PAOct 30, 2012abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.152.32/298SELFNET-CZSelf Servis Ltd.ASSIGNED PAOct 25, 2012abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.152.40 - 212.4.152.9960SELFNET-CZSelf Servis Ltd.ASSIGNED PANov 28, 2012abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.152.104/298Slapanov-CZMesto SlapanovASSIGNED PAOct 25, 2012abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.152.112 - 212.4.152.18776SELFNET-CZSelf Servis Ltd.ASSIGNED PAOct 25, 2012abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.152.188/304ZEALunknownASSIGNED PAOct 25, 2012abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.152.192/298BIT-MANAGERBiT ManagerASSIGNED PAOct 25, 2012abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.152.200/304ZENITunknownASSIGNED PAJul 12, 2016abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.152.204 - 212.4.152.21512SELFNET-CZSelf Servis Ltd.ASSIGNED PAOct 25, 2012abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.152.216/298SPRINTELSprintel s.r.o.ASSIGNED PAMar 19, 2012abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.152.224/2732AVG-CZAVG Technologies CZ, s.r.o.ASSIGNED PADec 1, 2010abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.153.0/2732PHONET-CZxPhonetASSIGNED PAOct 25, 2012abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.153.64/2816REBUDRIVERSNETREBUDRIVERSASSIGNED PAOct 25, 2012abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.153.80/2816CUST-SELFNET-CZSelf Servis Ltd.ASSIGNED PAOct 30, 2012abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.153.96/2732SELFNET-CZSelf Servis Ltd.ASSIGNED PAOct 25, 2012abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.153.128/2816VELBNET-CZVelbnet Ltd.ASSIGNED PAOct 25, 2012abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.154.0/24256GONET-CZIP Address range for GO-NETASSIGNED PAOct 25, 2012abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.155.0/24256VIDEONNetworking s.r.o.ASSIGNED PAOct 25, 2012abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.158.128/2732Banda-CommunicationsBanda CommunicationsASSIGNED PAOct 25, 2012abuse@o2.cz
via CZ-CZNET-20080611
└ 212.4.158.160/298SELFNET-CZCMTS KunstatASSIGNED PAOct 25, 2012abuse@o2.cz
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.

Composition

The types across the prefix's announced space, by addresses.

Announced space

Address share

Announced space

Types across the prefix

8,192 addresses
TypeAddressesShareRanges
Residential7,35690%12
Business83610%36

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
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