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Data as of Nov 7, 2026

78.156.159.0/24

No anonymizer space · no proxy exits in 30 days

OptoNet Communication, spol. s.r.o.

Announcement
78.156.128.0/19
RPKI valid
Announced by
AS43542
Type
Business
57% of it

Registrations in this block

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

RangeAddressesNetnameHolderTypeCreatedAbuse contact
78.156.128.0/198,192CZ-OPTONET-20070816OptoNet Communication, spol. s.r.o. (ORG-OCLS3-RIPE) · CZALLOCATED PAAug 16, 2007abuse@optonet.cz
└ 78.156.159.0/24256CZ-ON-SMB-pool1unknownLIR-PARTITIONED PASep 20, 2018abuse@optonet.cz
via CZ-OPTONET-20070816
└ 78.156.159.0/298CZ-Webhouse-ONIP pool 78.156.159/29 for Webhouse s.r.o., JIhlava, Czech RepublicASSIGNED PAMay 17, 2012abuse@optonet.cz
via CZ-ON-SMB-pool1
└ 78.156.159.16/298CZ-KSUSV_Jihlava-ONKrajska sprava a udrzba silnic Vysociny, Jihlava (OptoNet)ASSIGNED PAJan 10, 2008abuse@optonet.cz
via CZ-ON-SMB-pool1
└ 78.156.159.24/298CZ-WLS-ONWeindel Logistik Service CR, Jihlava (OptoNet)ASSIGNED PAMar 19, 2008abuse@optonet.cz
via CZ-ON-SMB-pool1
└ 78.156.159.48/298CZ-OptoNet-StormwareSTORMWARE s.r.o. - JihlavaASSIGNED PAMar 18, 2008abuse@optonet.cz
via CZ-ON-SMB-pool1
└ 78.156.159.56/298CZ-OptoWiFi-ONIP pool 78.156.159.56/29 for OptoNet WiFi users networksASSIGNED PAMay 27, 2013abuse@optonet.cz
via CZ-ON-SMB-pool1
└ 78.156.159.72/298CZ-IS-Engeneering_PROFI-ONIS-Engeneering PROFI, Jihlava, CZASSIGNED PAMar 17, 2009abuse@optonet.cz
via CZ-ON-SMB-pool1
└ 78.156.159.96/2816CZ-MU_VelMez-ONMestsky urad Velke Mezirici, Czech republicASSIGNED PAMay 28, 2008abuse@optonet.cz
via CZ-ON-SMB-pool1
└ 78.156.159.112/2816CZ-MU_VelMez2-ONORG. Mestsky urad Velke Mezirici, Czech republicASSIGNED PAJun 2, 2008abuse@optonet.cz
via CZ-ON-SMB-pool1
└ 78.156.159.128 - 78.156.159.14114CZ-Motorpal-ONMotorpal, a.s. (OptoNet)ASSIGNED PAAug 28, 2008abuse@optonet.cz
via CZ-ON-SMB-pool1
└ 78.156.159.144/2816CZ-Mobilbonus-ONMobilbonus s.r.o.ASSIGNED PAAug 29, 2008abuse@optonet.cz
via CZ-ON-SMB-pool1
└ 78.156.159.160/298CZ-MU_VelMez3-ONMestsky urad Velke Mezirici, Czech republicASSIGNED PAMar 19, 2009abuse@optonet.cz
via CZ-ON-SMB-pool1
└ 78.156.159.168/298CZ-htlVivaldi-ONHotel Vivaldi, Rancirov, Czech republicASSIGNED PANov 18, 2008abuse@optonet.cz
via CZ-ON-SMB-pool1
└ 78.156.159.192/2816CZ-Motorpal_2-ONMotorpal, a.s. (OptoNet) - company DMZ networkASSIGNED PAMar 18, 2009abuse@optonet.cz
via CZ-ON-SMB-pool1
└ 78.156.159.208/298CZ-TIRAD-ONTIRAD s.r.o.ASSIGNED PANov 27, 2008abuse@optonet.cz
via CZ-ON-SMB-pool1
└ 78.156.159.216 - 78.156.159.25136CZ-OptoNet_small_end_user_ONIP pool for small SMB users, Jihlava, Czech RepublicASSIGNED PAMay 17, 2012abuse@optonet.cz
via CZ-ON-SMB-pool1
└ 78.156.159.252/304CZ-Tchibo-ONTchibo Praha, Jihlava, CZ (OptoNet)ASSIGNED PAMar 19, 2008abuse@optonet.cz
via CZ-ON-SMB-pool1

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

256 addresses
TypeAddressesShareRanges
Business14657%14
Internet provider11043%7

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
Announced by

Covering announcement 78.156.128.0/19

Prefix
78.156.128.0/19
Announced by
AS43542 OptoNet Communication, spol. s.r.o.
Type
Internet provider
Proxy exits
19
Always-on exits
2
RPKI
RPKI valid
Netname
CZ-OPTONET-20070816
Registrant
OptoNet Communication, spol. s.r.o.
RIR
RIPE NCC
Origin network

AS43542

CZ
Name
OptoNet Communication, spol. s.r.o.
Type
Internet provider
Registered
Aug 20, 2007
Domain
optonet.cz
Industry
Computer and Information Technology
Spamhaus ASN-DROP
not listed