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Summary IP address summary information Name
OptoNet Communication, spol. s.r.o. Country
Website
Hosted domains
2,245 IPv4 addresses
8,192 IPv6 addresses
7.92 × 1028 ASN type
ISP Registry
RIPE Allocated
19 years ago on Aug 20, 2007 Updated
6 months ago on Mar 16, 2026
WHOIS
ASHandle: █████
OrgID: █████
ASName: ██████
ASNumber: AS█████
RegDate: ████-██-██
Updated: ████-██-██
TechHandle: ████-████
Source: ████
Powered by ASN to WHOIS data Important routers in AS43542
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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Traceroute Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this ASN. Learn more. Traceroute →
$ traceroute -a -n -q1 -f3 78.156.159.177
traceroute to 78.156.159.177 (78.156.159.177 ): 64 hops max, 52 byte packets
Measurement taken from IPinfo ProbeNet in Prague, CZ
On October 2, 2026
There are 3 upstreams for this ASN.
ASN Name Rank AS6855 Slovak Telekom, a.s. #341 AS6939 Hurricane Electric LLC #18 AS16019 Vodafone Czech Republic a.s. #433
There are 4 downstreams for this ASN.
Important routers in AS43542 Share of IPv4 footprint per hexagon Less More
Held location over 90 days 91%
Held location over 1 year 87%
Median days between moves 181 days
Geolocation scope National How consistently this network's IPs hold their geolocation. Read relative to the network type, not as a quality score.
There are 2,245 domain names hosted across 52 IP addresses on this ASN.
Pingable IPs 20 IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more
IP Address ASN Details 78.156.150.60 Ping AS43542 OptoNet Communication, spol. s.r.o. #7,619 2.70ms from Prague, CZ 78.156.159.246 Ping AS43542 OptoNet Communication, spol. s.r.o. #7,619 1.83ms from Prague, CZ 78.156.137.113 Ping AS43542 OptoNet Communication, spol. s.r.o. #7,619 1.82ms from Prague, CZ 2a00:d940:2:2:c000:: Ping AS43542 OptoNet Communication, spol. s.r.o. #7,619 2.13ms from Prague, CZ 78.156.152.36 Ping AS43542 OptoNet Communication, spol. s.r.o. #7,619 2.06ms from Prague, CZ 2a00:d940:3:2000::1 Ping AS43542 OptoNet Communication, spol. s.r.o. #7,619 2.98ms from Prague, CZ 78.156.133.206 Ping AS43542 OptoNet Communication, spol. s.r.o. #7,619 1.79ms from Prague, CZ 78.156.154.1 Ping AS43542 OptoNet Communication, spol. s.r.o. #7,619 2.50ms from Prague, CZ 78.156.131.249 Ping AS43542 OptoNet Communication, spol. s.r.o. #7,619 2.07ms from Prague, CZ 2a00:d940:0:b::4 Ping AS43542 OptoNet Communication, spol. s.r.o. #7,619 1.86ms from Prague, CZ
Show more
Activity A pronounced day/night rhythm — the signature of a consumer/eyeball network whose users sleep at night.
There are 34 peers for this ASN.
Times shown in Czechia local time (UTC+1). Less More
Peak hour 08:00–09:00
Active hours 19 hrs
Weekend vs weekday weekdays heavier
Busiest day Tue
Network type Consumer ISP
Geography Czechia New IPinfo Places identifies hotels, airports, stadiums, and more with building-level precision.
Explore Places AS1764 Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH #745
AS6663 Euroweb Romania S.R.L. #575
AS6855 Slovak Telekom, a.s. #341
AS6939 Hurricane Electric LLC #18
AS8218 Zayo Infrastructure France SA #690
AS16019 Vodafone Czech Republic a.s. #433
Sports Center
Water Park
Stadium