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Data as of Nov 13, 2026

178.17.96.0/20

No anonymizer space · no proxy exits in 30 days

O2 Czech Republic, a.s.

Announcement
this exact prefix
RPKI valid
Announced by
AS16246
Type
Residential
94% of it

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
178.17.80.0 - 178.17.111.2558,192CZ-CZNET-20100318O2 Czech Republic, a.s. (ORG-STAN1-RIPE) · CZALLOCATED PAApr 1, 2025abuse@o2.cz
└ 178.17.96.0/24256NEJCZ_CATRunknownASSIGNED PAJan 12, 2021abuse@o2.cz
via CZ-CZNET-20100318
└ 178.17.97.0/24256NEJCZ_CATRunknownASSIGNED PAJan 12, 2021abuse@o2.cz
via CZ-CZNET-20100318
└ 178.17.98.0/24256NEJCZ_CATRunknownASSIGNED PAJan 12, 2021abuse@o2.cz
via CZ-CZNET-20100318
└ 178.17.99.0/24256NEJCZ_CATRunknownASSIGNED PAJan 12, 2021abuse@o2.cz
via CZ-CZNET-20100318
└ 178.17.100.0/24256NEJCZ_CATRunknownASSIGNED PAJan 12, 2021abuse@o2.cz
via CZ-CZNET-20100318
└ 178.17.101.0/24256NEJCZ_CATRunknownASSIGNED PAJan 12, 2021abuse@o2.cz
via CZ-CZNET-20100318
└ 178.17.102.0/24256NEJCZ_CATRunknownASSIGNED PAJan 12, 2021abuse@o2.cz
via CZ-CZNET-20100318
└ 178.17.103.0/24256NEJCZ_CATRunknownASSIGNED PAJan 12, 2021abuse@o2.cz
via CZ-CZNET-20100318
└ 178.17.104.0/24256NEJCZ_CATRunknownASSIGNED PAJan 12, 2021abuse@o2.cz
via CZ-CZNET-20100318
└ 178.17.105.0/24256NEJCZ_CATRunknownASSIGNED PAJan 13, 2021abuse@o2.cz
via CZ-CZNET-20100318
└ 178.17.106.0/24256NEJCZ_CATRunknownASSIGNED PAJan 13, 2021abuse@o2.cz
via CZ-CZNET-20100318
└ 178.17.107.0/24256NEJCZ_CATRunknownASSIGNED PAJan 13, 2021abuse@o2.cz
via CZ-CZNET-20100318
└ 178.17.108.0/24256NEJCZ_CATRunknownASSIGNED PAJan 13, 2021abuse@o2.cz
via CZ-CZNET-20100318
└ 178.17.109.0/24256NEJCZ_CATRunknownASSIGNED PAJan 13, 2021abuse@o2.cz
via CZ-CZNET-20100318
└ 178.17.110.0/24256NEJCZ_CATRunknownASSIGNED PAJan 13, 2021abuse@o2.cz
via CZ-CZNET-20100318
└ 178.17.111.0/24256NEJCZ_CATR_serversunknownASSIGNED PAJan 13, 2021abuse@o2.cz
via CZ-CZNET-20100318

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

4,096 addresses
TypeAddressesShareRanges
Residential3,84094%1
Hosting2566.3%1

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
Routing timeline

Who has announced this prefix

Summary

Routing history

Pattern
Stable
First seen
Apr 2010
Current origin since
Aug 2020 · 6.2 yr
Origin networks
3
Last change of origin
Aug 2020
Recorded history

History

Handoffs
2