Autonomous System details

AS43542

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

Czechia

Need more data or want to access it via API or data downloads? Sign up to get free access

Sign up for free ›

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

Field Value
Country Czechia
Website optonet.cz
Hosted domains 2,415
IPv4 addresses 8,192
IPv6 addresses 79,228,162,514,264,338,000,000,000,000
ASN type ISP
Registry ripe
Allocated 19 years ago on Aug 20, 2007
Updated a month 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.
Get this data and more with IPinfo's powerful IP Ranges API - quickly and easily identify company-owned IP ranges.
IP Ranges API

WHOIS Details

Join for free to view WHOIS details › 

                                                ASHandle:       AS43542
                                                OrgID:          AS43542
                                                ASName:         AS43542
                                                ASNumber:       AS43542
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA
Get this data and more with IPinfo's WHOIS product - effortless access to POCs, ORGs, and Networks, for actionable intelligence.
IP WHOIS API & Database

Hosted Domains

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

Join for free to explore hosted domains ›
IP Address Domain Domains on this IP
78.156.158.199 ██████████ 922
78.156.158.200 ██████████ 446
78.156.158.194 ██████████ 334
78.156.158.75 █████████ 219
78.156.156.10 ██████████ 113
78.156.158.91 ██████████ 74
78.156.158.74 ██████████ 69
78.156.143.203 ████████ 35
78.156.158.72 ██████████ 15
78.156.135.74 ███████ 15

Discover all domains hosted on a single IP address with IPinfo's powerful Hosted Domains (Reverse IP) solution.
Useful for Cybersecurity
Hosted Domains API & Database

Peers

There are 32 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
AS24940 Hetzner Online GmbH
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.
AS43733 Viva Armenia CJSC
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
Get this data and more insights on related domains, allocation dates, registry names, IP counts with IPinfo's IP-to-ASN product.
ASN API & Database

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
Get this data and more insights on related domains, allocation dates, registry names, IP counts with IPinfo's IP-to-ASN product.
ASN API & Database

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
Get this data and more insights on related domains, allocation dates, registry names, IP counts with IPinfo's IP-to-ASN product.
ASN API & Database

Pingable IPs

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

IP Address ASN Details
78.156.155.68 AS43542 OptoNet Communication, spol. s.r.o. 1.92ms from Prague, CZ
78.156.159.246 AS43542 OptoNet Communication, spol. s.r.o. 1.88ms from Prague, CZ
78.156.143.197 AS43542 OptoNet Communication, spol. s.r.o. 1.88ms from Prague, CZ
78.156.158.161 AS43542 OptoNet Communication, spol. s.r.o. 1.82ms from Prague, CZ
78.156.137.9 AS43542 OptoNet Communication, spol. s.r.o. 1.85ms from Prague, CZ
78.156.128.17 AS43542 OptoNet Communication, spol. s.r.o. 1.81ms from Prague, CZ
2a00:d940:3:2000::1 AS43542 OptoNet Communication, spol. s.r.o. 2.95ms from Prague, CZ
78.156.157.73 AS43542 OptoNet Communication, spol. s.r.o. 1.86ms from Prague, CZ
78.156.150.121 AS43542 OptoNet Communication, spol. s.r.o. 2.74ms from Prague, CZ
78.156.152.19 AS43542 OptoNet Communication, spol. s.r.o. 2.39ms from Prague, CZ
78.156.133.144 AS43542 OptoNet Communication, spol. s.r.o. 1.80ms from Prague, CZ
2a00:d940:0:b::3 AS43542 OptoNet Communication, spol. s.r.o. 1.88ms from Prague, CZ
78.156.156.251 AS43542 OptoNet Communication, spol. s.r.o. 1.89ms from Prague, CZ
78.156.135.105 AS43542 OptoNet Communication, spol. s.r.o. 1.89ms from Prague, CZ
78.156.147.236 AS43542 OptoNet Communication, spol. s.r.o. 2.01ms from Prague, CZ
78.156.154.1 AS43542 OptoNet Communication, spol. s.r.o. 2.60ms from Prague, CZ
78.156.144.20 AS43542 OptoNet Communication, spol. s.r.o. 2.75ms from Prague, CZ
78.156.149.33 AS43542 OptoNet Communication, spol. s.r.o. 2.06ms from Prague, CZ
78.156.131.249 AS43542 OptoNet Communication, spol. s.r.o. 1.99ms 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
186.39.99.118 AS22927 Telefonica de Argentina 2.31ms from Buenos Aires, AR
222.211.91.198 AS38283 CHINANET SiChuan Telecom Internet Data Center 1.57ms from Chengdu, CN
94.7.220.166 AS5607 Sky UK Limited 5.95ms from Erith, GB
31.185.217.134 AS6871 Plusnet 2.19ms from Erith, GB
191.10.155.246 AS26599 TELEFÔNICA BRASIL S.A 14.42ms from Fortaleza, BR
114.139.5.134 AS4134 CHINANET BACKBONE 3.45ms from Guiyang, CN
211.137.244.70 AS132525 HeiLongJiang Mobile Communication Company Limited 7.95ms from Harbin, CN
113.254.164.6 AS9304 HGC Global Communications Limited 1.35ms from Hong Kong, HK
86.28.70.38 AS5089 Virgin Media Limited 2.10ms from London, GB
147.147.113.70 AS6871 Plusnet 7.68ms from London, GB
79.20.10.198 AS3269 Telecom Italia S.p.A. 7.91ms from Milan, IT
68.237.120.102 AS701 Verizon Business 2.50ms from New York City, US
73.10.44.150 AS7922 Comcast Cable Communications, LLC 6.04ms from New York City, US
37.194.244.102 AS31200 Novotelecom Ltd 1.26ms from Novosibirsk, RU
79.217.86.150 AS3320 Deutsche Telekom AG 3.54ms from Nuernberg, DE
76.132.56.38 AS7922 Comcast Cable Communications, LLC 2.43ms from San Jose, US
125.180.215.22 AS17858 LG POWERCOMM 1.91ms from Seoul, KR
188.183.249.102 AS3292 TDC Holding A/S 7.18ms from Skanderborg, DK
219.54.251.38 AS17676 SoftBank Corp. 3.43ms from Tokyo, JP
83.9.174.246 AS5617 Orange Polska Spolka Akcyjna 1.36ms from Warsaw, PL
188.212.130.22 AS50637 Expressoft Technology SRL 0.62ms from Bucharest, RO
50.57.28.22 AS19994 Rackspace Hosting 0.50ms from Chicago, US
64.236.20.102 AS8075 Microsoft Corporation 0.15ms from Des Moines, US
47.96.128.166 AS37963 Hangzhou Alibaba Advertising Co.,Ltd. 2.20ms from Hangzhou, CN
175.121.81.150 AS9318 SK Broadband Co Ltd 7.00ms from Incheon, KR

Traceroute

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

$
traceroute -a -n -q1 78.156.152.20
traceroute to 78.156.152.20 (78.156.152.20): 64 hops max, 52 byte packets
2 [] 91.210.17.48 4.938 ms
3 *
4 *
5 *
6 *
7 *
8 *
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.

Data built with users in mind: reliable, accurate, and easy-to-use

Discover why industry-leading companies around the globe love our data. IPinfo's accurate insights fuel use cases from cybersecurity, data enrichment, web personalization, and much more.

Get Started for Free Contact Sales
IPinfo for all your IP geolocation needs

Our IP tools

Explore all tools
What is my IP

What is my IP

Test our data accuracy by viewing insights from your IP address.

See your IP address
Map IPs

Map IPs

Paste up to 500,000 IPs to see where they're located on a map.

Try Map IPs
Summarize IPs

Summarize IPs

Use our data visualization tool to create a visual overview of multiple IPs.

Try Summarize IPs