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Data as of Nov 4, 2026

80.243.103.0/24

No anonymizer space · no proxy exits in 30 days

O2 Czech Republic, a.s.

Announcement
80.243.96.0/20
RPKI valid
Announced by
AS29321
Type
Residential
Risk
0 / 100 · Low

Registrations in this block

The registry's network records over this block, widest first, each under its parent.

RangeAddressesNetnameHolderTypeCreatedAbuse contact
80.243.96.0/204,096CZ-CZNET-20090527O2 Czech Republic, a.s. (ORG-STAN1-RIPE) · CZALLOCATED PAMay 27, 2009abuse@o2.cz
└ 80.243.103.0/24256CENTRONET-TriplePlayCentronet, a.s.ASSIGNED PASep 18, 2009abuse@o2.cz
via CZ-CZNET-20090527

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

AnnouncementRouting historyRPKI & IRRWhois & abuse
Announced by

Covering announcement 80.243.96.0/20

Prefix
80.243.96.0/20
Announced by
AS29321 O2 Czech Republic, a.s.
Type
Residential
Proxy exits
1
RPKI
RPKI valid
Netname
CZ-CZNET-20090527
Registrant
O2 Czech Republic, a.s.
RIR
RIPE NCC
Origin network

AS29321

CZ
Name
O2 Czech Republic, a.s.
Type
Internet provider
Registered
Jul 31, 2003
Domain
o2.cz
Website
www.centronet.cz/
Industry
Internet Service Provider (ISP)
Spamhaus ASN-DROP
not listed