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
78.156.152.19 AS43542 OptoNet Communication, spol. s.r.o. 2.40ms from Prague, CZ
78.156.143.100 AS43542 OptoNet Communication, spol. s.r.o. 1.88ms from Prague, CZ
78.156.135.41 AS43542 OptoNet Communication, spol. s.r.o. 1.89ms from Prague, CZ
78.156.147.236 AS43542 OptoNet Communication, spol. s.r.o. 2.02ms from Prague, CZ
78.156.155.13 AS43542 OptoNet Communication, spol. s.r.o. 1.90ms from Prague, CZ
78.156.144.20 AS43542 OptoNet Communication, spol. s.r.o. 2.72ms from Prague, CZ
78.156.150.60 AS43542 OptoNet Communication, spol. s.r.o. 2.71ms from Prague, CZ
78.156.159.238 AS43542 OptoNet Communication, spol. s.r.o. 1.87ms from Prague, CZ
78.156.154.1 AS43542 OptoNet Communication, spol. s.r.o. 3.85ms from Prague, CZ
78.156.131.249 AS43542 OptoNet Communication, spol. s.r.o. 1.97ms from Prague, CZ
78.156.158.161 AS43542 OptoNet Communication, spol. s.r.o. 1.83ms from Prague, CZ
78.156.128.17 AS43542 OptoNet Communication, spol. s.r.o. 1.81ms from Prague, CZ
78.156.137.65 AS43542 OptoNet Communication, spol. s.r.o. 1.83ms from Prague, CZ
78.156.149.33 AS43542 OptoNet Communication, spol. s.r.o. 2.04ms from Prague, CZ
78.156.156.1 AS43542 OptoNet Communication, spol. s.r.o. 1.86ms from Prague, CZ
2a00:d940:2:2:c000:: AS43542 OptoNet Communication, spol. s.r.o. 2.20ms from Prague, CZ
2a00:d940:0:b::3 AS43542 OptoNet Communication, spol. s.r.o. 1.84ms from Prague, CZ
78.156.133.144 AS43542 OptoNet Communication, spol. s.r.o. 1.78ms from Prague, CZ
78.156.157.73 AS43542 OptoNet Communication, spol. s.r.o. 1.83ms from Prague, CZ
2a00:d940:3:2000::1 AS43542 OptoNet Communication, spol. s.r.o. 3.04ms 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
50.57.28.22 AS19994 Rackspace Hosting 0.53ms from Chicago, US
50.195.207.230 AS7922 Comcast Cable Communications, LLC 10.25ms from Chicago, US
35.192.226.214 AS396982 Google LLC 0.24ms from Council Bluffs, US
3.253.200.86 AS16509 Amazon.com, Inc. 0.31ms from Dublin, IE
58.23.108.38 AS4837 CHINA UNICOM China169 Backbone 8.51ms from Fuzhou, CN
219.128.213.102 AS134763 CHINANET Guangdong province network 2.64ms from Guangzhou, CN
60.171.15.86 AS4134 CHINANET BACKBONE 4.67ms from Huainan, CN
2.102.251.182 AS13285 TalkTalk Communications Limited 8.15ms from London, GB
99.97.125.166 AS7018 AT&T Enterprises, LLC 5.80ms from Los Angeles, US
72.184.255.86 AS33363 Charter Communications, Inc 10.62ms from Orlando, US
137.83.216.166 AS394089 Google LLC 0.81ms from Osaka, JP
176.231.57.118 AS12400 Partner Communications Ltd. 5.34ms from Rosh Ha‘Ayin, IL
117.200.86.54 AS9829 National Internet Backbone 11.91ms from Saint Thomas Mount, IN
103.175.201.38 AS131812 Humax Networks, INC. 2.17ms from Seoul, KR
211.115.134.22 AS4766 Korea Telecom 1.40ms from Seoul, KR
20.227.127.38 AS8075 Microsoft Corporation 0.80ms from Sydney, AU
212.83.172.230 AS12876 Scaleway SAS 0.22ms from Amsterdam, NL
152.180.0.230 AS701 Verizon Business 3.01ms from Ashburn, US
94.64.238.6 AS6799 Ote SA (Hellenic Telecommunications Organisation) 1.00ms from Athens, GR
134.6.169.118 AS16504 Granite Telecommunications LLC 2.15ms from Chicago, US
18.118.79.182 AS16509 Amazon.com, Inc. 0.16ms from Columbus, US
34.27.112.54 AS396982 Google LLC 0.15ms from Council Bluffs, US
46.252.142.182 AS3209 Vodafone GmbH 3.85ms from Frankfurt am Main, DE
14.175.92.166 AS45899 VNPT Corp 1.97ms from Hanoi, VN
114.206.158.54 AS9318 SK Broadband Co Ltd 4.36ms 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 -f4 78.156.155.46
traceroute to 78.156.155.46 (78.156.155.46): 64 hops max, 52 byte packets
4 [] 91.210.17.48 5.206 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.

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