ASN Lookup Tool

OptoNet Communication, spol. s.r.o. optonet.cz CZ CZ 2 Routes

AS Data

AS43542

AS43542OptoNet Communication, spol. s.r.o.

AS Number 43542
AS Name OptoNet-AS
Organization OptoNet Communication, spol. s.r.o.(org-ocls3-ripe)
Country CZ
Website optonet.cz
Number of IPv4 Routes 1
Number of IPv6 Routes 1
ASN type BUSINESS
Allocation Status ASSIGNED
Registry RIPE
Date Allocated 2007-08-20

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Use ASN data for AS43542 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route # IPs
78.156.128.0/19 8192
2a00:d940::/32 ~79×10²⁷

Raw Whois Response

% This is the RIPE Database query service.
% The objects are in RPSL format.
%
% The RIPE Database is subject to Terms and Conditions.
% See https://docs.db.ripe.net/terms-conditions.html

% Note: this output has been filtered.
%       To receive output for a database update, use the "-B" flag.

% Information related to 'AS43075 - AS44168'

as-block:       AS43075 - AS44168
descr:          RIPE NCC ASN block
remarks:        These AS Numbers are assigned to network operators in the RIPE NCC service region.
mnt-by:         RIPE-NCC-HM-MNT
created:        2023-12-11T15:09:58Z
last-modified:  2023-12-11T15:09:58Z
source:         RIPE

% Information related to 'AS43542'

% Abuse contact for 'AS43542' is 'abuse@optonet.cz'

aut-num:        AS43542
as-name:        OptoNet-AS
org:            ORG-OCLS3-RIPE
remarks:        ======== TRANSIT UPSTREAM ========
remarks:        -- VODAFONE-CZ --
import:         from AS16019 accept any
export:         to AS16019 announce AS-OPTONET-TRANSIT
remarks:        -- T-Mobile CZ --
import:         from AS6855 accept any
export:         to AS6855 announce AS-OPTONET-TRANSIT
remarks:        ======== IXs peers ========
remarks:        -- NIX.CZ ROUTESERVERS --
import:         from AS47200 accept ANY
export:         to AS47200 announce AS-OPTONET-TRANSIT
remarks:        ======== TRANSIT CUSTOMERS ========
remarks:        -- Kraj Vysocina --
import:         from AS48091 accept AS48091
export:         to AS48091 announce any
remarks:        -- LCJ s.r.o. --
import:         from AS44104 accept AS44104
export:         to AS44104 announce any
remarks:        -- NGA Services, spol. s r.o. --
import:         from AS202979 accept AS202979 AS203365
export:         to AS202979 announce any
remarks:        -- CNI Group s.r.o. --
import:         from AS207945 accept AS207945
export:         to AS207945 announce any
admin-c:        TJ1042-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
tech-c:         TJ1042-RIPE
mnt-by:         MNT-OPTONET
created:        2007-08-20T08:25:37Z
last-modified:  2026-03-16T07:54:18Z
source:         RIPE # Filtered

organisation:   ORG-OCLS3-RIPE
org-name:       OptoNet Communication, spol. s.r.o.
country:        CZ
org-type:       LIR
address:        Cerveny Kriz 318
address:        586 01
address:        Jihlava
address:        CZECH REPUBLIC
phone:          +420564040152
fax-no:         +420564040134
admin-c:        TJ1042-RIPE
mnt-ref:        RIPE-NCC-HM-MNT
mnt-ref:        MNT-OPTONET
mnt-ref:        MNT-OPTONET_JT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         MNT-OPTONET
abuse-c:        AOC17-RIPE
created:        2006-09-25T15:28:01Z
last-modified:  2022-12-02T13:59:08Z
source:         RIPE # Filtered

person:         Tichy Josef
address:        OptoNet Communication, spol. s r.o.
address:        Cerveny Kriz 250
address:        568 02 Jihlava
address:        Czech republic
phone:          +420564040133
nic-hdl:        TJ1042-RIPE
mnt-by:         MNT-OPTONET_JT
created:        2007-08-06T07:09:45Z
last-modified:  2017-10-30T21:56:13Z
source:         RIPE # Filtered

% This query was served by the RIPE Database Query Service version 1.121.1 (DEXTER)

Parsed Whois Response

Peers

AS Number Description Country
AS24482 SG.GS SG
AS21215 UNITED GROUP NETWORK INFRASTRUCTURE d.o.o. Beograd RS
AS40994 Hohl IT e.U. AT
AS6881 NIX.CZ z.s.p.o. CZ
AS6855 Slovak Telekom, a.s. SK
AS1764 Next Layer Telekommunikationsdienstleistungs und Beratungs GmbH AT
AS60602 Inovare-Prim SRL MD
AS6939 Hurricane Electric LLC US
AS6204 ZET.NET IP Transit RO
AS51184 Fonira Telekom GmbH AT

Upstreams

AS Number Description Country
AS39120 Convergenze S.p.A. IT
AS21215 UNITED GROUP NETWORK INFRASTRUCTURE d.o.o. Beograd RS
AS44306 OMONIA d.o.o. HR
AS14840 BR.Digital Telecom BR
AS6855 Slovak Telekom, a.s. SK
AS1764 Next Layer Telekommunikationsdienstleistungs und Beratungs GmbH AT
AS263444 Open X Tecnologia Ltda BR
AS6939 Hurricane Electric LLC US
AS6204 ZET.NET IP Transit RO
AS22356 Durand do Brasil Ltda BR

Downstreams

AS Number Description Country
AS202979 NGA Services, spol. s r.o. CZ
AS48091 Kraj Vysocina CZ
AS44104 LCJ Invest, a.s. CZ
AS207945 CNI Group s.r.o. CZ

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Frequently Asked Questions

ASN AS43542 is an Autonomous System Number used to identify a network for BGP internet routing.
AS43542 is listed under OptoNet Communication, spol. s.r.o..
Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.
Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.
WHOIS provides registration and contact context for ASN ownership, administration, and operational reference.
This page previews large ASN datasets. Use See more to load additional rows, and upgrade your plan to view complete peer, route, upstream, and downstream data.