Autonomous System details

AS43542

OptoNet Communication, spol. s.r.o.  ·  optonet.cz

Czechia

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AS43542 – OptoNet Communication, spol. s.r.o.

Field Value
Country Czechia
Website optonet.cz
Hosted domains 2,415
IPv4 addresses 8,192
IPv6 addresses 79,228,162,514,264,337,593,543,950,336
ASN type ISP
Registry ripe
Allocated 19 years ago on Aug 20, 2007
Updated 7 days ago on Mar 16, 2026

IP Ranges

Netblock Company Num of IPs
78.156.128.0/19 OptoNet Communication, spol. s.r.o. 8,192
Netblock Company
2a00:d940::/32 OptoNet Communication, spol. s.r.o.
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WHOIS Details

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                                                ASHandle:       AS43542
                                                OrgID:          AS43542
                                                ASName:         AS43542
                                                ASNumber:       AS43542
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA
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Hosted Domains

There are 2,415 domain names hosted across 58 IP addresses on this ASN.

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IP Address Domain Domains on this IP
78.156.158.199 ██████████ 1,000
78.156.158.200 ██████████ 423
78.156.158.194 ██████████ 360
78.156.158.75 █████████ 228
78.156.156.10 ██████████ 129
78.156.158.91 ██████████ 85
78.156.158.74 ██████████ 70
78.156.143.203 ██████████ 37
78.156.158.152 ██████████ 18
78.156.158.72 ██████████ 17

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Peers

There are 30 peers for this ASN.

Peers Name
AS14840 BR.Digital Telecom
AS16019 Vodafone Czech Republic a.s.
AS1764 Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH
AS198150 SIACOM JSC
AS202979 NGA Services, spol. s r.o.
AS207945 CNI Group s.r.o.
AS21215 UNITED GROUP NETWORK INFRASTRUCTURE d.o.o. Beograd
AS212483 LEVEL EIGHTY-SIX COMMUNICATIONS LTD
AS22356 Durand do Brasil Ltda
AS24482 SG.GS
AS263444 Open X Tecnologia Ltda
AS29504 Freenet Liberec, z.s.
AS32590 Valve Corporation
AS36236 NetActuate, Inc
AS39120 Convergenze S.p.A.
AS40994 Hohl IT e.U.
AS44104 LCJ Invest, a.s.
AS44306 OMONIA d.o.o.
AS4455 IX Reach Ltd
AS47200 NIX.CZ z.s.p.o.
AS48091 Kraj Vysocina
AS49544 i3D.net B.V
AS51184 Fonira Telekom GmbH
AS57463 NetIX Communications JSC
AS6204 INTERKVM HOST SRL
AS6663 Euroweb Romania S.R.L.
AS6855 Slovak Telekom, a.s.
AS6881 NIX.CZ z.s.p.o.
AS6939 Hurricane Electric LLC
AS8218 Zayo Infrastructure France SA
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Upstreams

There are 3 upstreams for this ASN.

upstreams Name
AS16019 Vodafone Czech Republic a.s.
AS6855 Slovak Telekom, a.s.
AS6939 Hurricane Electric LLC
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Downstreams

There are 4 downstreams for this ASN.

Downstreams Name
AS202979 NGA Services, spol. s r.o.
AS207945 CNI Group s.r.o.
AS44104 LCJ Invest, a.s.
AS48091 Kraj Vysocina
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Pingable IPs

20 IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
78.156.133.65 AS43542 OptoNet Communication, spol. s.r.o. 1.78ms from Prague, CZ
78.156.157.73 AS43542 OptoNet Communication, spol. s.r.o. 1.85ms from Prague, CZ
2a00:d940:2:2:c000::2 AS43542 OptoNet Communication, spol. s.r.o. 4.87ms from Prague, CZ
78.156.137.113 AS43542 OptoNet Communication, spol. s.r.o. 1.86ms from Prague, CZ
78.156.149.33 AS43542 OptoNet Communication, spol. s.r.o. 2.01ms from Prague, CZ
2a00:d940:3:2000::1 AS43542 OptoNet Communication, spol. s.r.o. 2.98ms from Prague, CZ
78.156.144.1 AS43542 OptoNet Communication, spol. s.r.o. 2.70ms from Prague, CZ
78.156.128.83 AS43542 OptoNet Communication, spol. s.r.o. 1.83ms from Prague, CZ
78.156.150.60 AS43542 OptoNet Communication, spol. s.r.o. 2.70ms from Prague, CZ
78.156.155.13 AS43542 OptoNet Communication, spol. s.r.o. 1.89ms from Prague, CZ
78.156.131.249 AS43542 OptoNet Communication, spol. s.r.o. 2.02ms from Prague, CZ
78.156.156.94 AS43542 OptoNet Communication, spol. s.r.o. 1.85ms from Prague, CZ
78.156.154.1 AS43542 OptoNet Communication, spol. s.r.o. 2.65ms from Prague, CZ
78.156.143.110 AS43542 OptoNet Communication, spol. s.r.o. 1.89ms from Prague, CZ
2a00:d940:0:b::4 AS43542 OptoNet Communication, spol. s.r.o. 1.84ms from Prague, CZ
78.156.147.236 AS43542 OptoNet Communication, spol. s.r.o. 2.03ms from Prague, CZ
78.156.135.73 AS43542 OptoNet Communication, spol. s.r.o. 1.90ms from Prague, CZ
78.156.158.161 AS43542 OptoNet Communication, spol. s.r.o. 1.83ms from Prague, CZ
78.156.152.19 AS43542 OptoNet Communication, spol. s.r.o. 2.38ms from Prague, CZ
78.156.159.246 AS43542 OptoNet Communication, spol. s.r.o. 1.83ms from Prague, CZ

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address ASN Details
101.182.145.54 AS1221 Telstra Limited 2.97ms from Brisbane, AU
108.196.74.214 AS7018 AT&T Enterprises, LLC 9.88ms from Chicago, US
50.195.207.230 AS7922 Comcast Cable Communications, LLC 10.89ms from Chicago, US
94.191.108.214 AS45090 Shenzhen Tencent Computer Systems Company Limited 0.22ms from Chongqing, CN
162.192.45.118 AS7018 AT&T Enterprises, LLC 2.23ms from Los Angeles, US
31.190.70.86 AS1267 WIND TRE S.P.A. 2.29ms from Milan, IT
95.114.144.54 AS6805 Telefonica Germany GmbH & Co.OHG 5.42ms from Munich, DE
113.14.236.214 AS4134 CHINANET-BACKBONE 0.68ms from Nanning, CN
202.247.33.70 AS2518 BIGLOBE Inc. 2.76ms from Osaka, JP
153.212.179.38 AS4713 NTT DOCOMO BUSINESS,Inc. 11.13ms from Osaka, JP
189.50.128.150 AS28330 IFTNET-TELECOM 10.25ms from Osasco, BR
114.215.119.214 AS37963 Hangzhou Alibaba Advertising Co.,Ltd. 0.30ms from Qingdao, CN
27.200.44.246 AS4837 CHINA UNICOM China169 Backbone 6.84ms from Qingdao, CN
177.192.169.134 AS28573 Claro NXT Telecomunicacoes Ltda 9.68ms from Rio de Janeiro, BR
49.170.229.214 AS17858 LG POWERCOMM 1.77ms from Seoul, KR
211.54.164.38 AS4766 Korea Telecom 4.79ms from Seoul, KR
1.172.16.38 AS3462 Data Communication Business Group 5.78ms from Taichung, TW
133.237.6.246 AS23820 Rakuten Group, Inc. 1.90ms from Tokyo, JP
99.246.67.150 AS812 Rogers Communications Canada Inc. 3.69ms from Toronto, CA
3.212.227.150 AS14618 Amazon.com, Inc. 0.50ms from Ashburn, US
186.115.213.198 AS3816 COLOMBIA TELECOMUNICACIONES S.A. ESP BIC 5.35ms from Bogota, CO
41.35.54.102 AS8452 TE-AS 4.42ms from Cairo, EG
84.165.249.214 AS3320 Deutsche Telekom AG 4.32ms from Frankfurt am Main, DE
181.198.239.134 AS27947 Telconet S.A 1.62ms from Guayaquil, EC
171.228.28.230 AS7552 Viettel Group 3.13ms from Hanoi, VN

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this ASN. Learn more.

$
traceroute -a -n -q1 -f4 78.156.135.65
traceroute to 78.156.135.65 (78.156.135.65): 64 hops max, 52 byte packets
4 [] 91.210.17.48 5.385 ms
5 *
6 *
Measurement taken from IPinfo ProbeNet in Prague, CZ
On

Related Networks

What is an ASN?

Autonomous System Numbers (ASNs) are assigned to entities such as Internet Service Providers and other large organizations that control blocks of IP addresses. This network page, and the organization field that's shown on the main IP address information page and also returned in the geolocation API are based on the ASN.

The ASN details will often correspond to the IP address owner, but for smaller organizations it may be that organization's parent, or their ISP. Find out more about AS43542 at robtex.

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