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Summary IP address summary information Name
ICZ a.s. Country
Website
Hosted domains
83 IPv4 addresses
2,304 IPv6 addresses
1.21 × 1024 ASN type
Business Registry
RIPE Allocated
19 years ago on Sep 24, 2007 Updated
1 year ago on Oct 2, 2025
WHOIS
ASHandle: █████
OrgID: █████
ASName: ██████
ASNumber: AS█████
RegDate: ████-██-██
Updated: ████-██-██
TechHandle: ████-████
Source: ████
Powered by ASN to WHOIS data Important routers in AS43757
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 AS43757 at robtex .
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Data Data
Why IPinfo? Why IPinfo?
Resources Resources
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 -m10 78.31.28.195
traceroute to 78.31.28.195 (78.31.28.195 ): 10 hops max, 52 byte packets
Measurement taken from IPinfo ProbeNet in Milan, IT
On October 16, 2026
There are 3 peers for this ASN.
ASN Name Rank AS5578 SWAN, a.s. #999 AS5610 O2 Czech Republic, a.s. #434 AS6855 Slovak Telekom, a.s. #344
There are 3 upstreams for this ASN.
ASN Name Rank AS5578 SWAN, a.s. #999 AS5610 O2 Czech Republic, a.s. #434 AS6855 Slovak Telekom, a.s. #344
There are 0 downstreams for this ASN.
No downstreams found.
Important routers in AS43757 Share of IPv4 footprint per hexagon Less More
Held location over 90 days 98%
Held location over 1 year 95%
Median days between moves 335 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 83 domain names hosted across 3 IP addresses on this ASN.
Pingable IPs 8 IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more
IP Address ASN Details 78.31.26.129 Ping AS43757 ICZ a.s. #56,091 1.24ms from Prague, CZ 2001:67c:1578:8101:0:1:0:2 Ping AS43757 ICZ a.s. #56,091 1.17ms from Prague, CZ 78.31.27.221 Ping AS43757 ICZ a.s. #56,091 1.19ms from Prague, CZ 78.31.31.251 Ping AS43757 ICZ a.s. #56,091 1.32ms from Prague, CZ 78.31.29.2 Ping AS43757 ICZ a.s. #56,091 1.33ms from Prague, CZ 192.108.126.10 Ping AS43757 ICZ a.s. #56,091 2.40ms from Bratislava, SK 78.31.24.254 Ping AS43757 ICZ a.s. #56,091 1.06ms from Prague, CZ 78.31.25.19 Ping AS43757 ICZ a.s. #56,091 1.27ms from Prague, CZ
Activity A pronounced day/night rhythm — the signature of a consumer/eyeball network whose users sleep at night.
Times shown in Czechia local time (UTC+1). Less More
Peak hour 08:00–09:00
Active hours 11 hrs
Weekend vs weekday weekdays heavier
Busiest day Wed
Network type Business
Geography Czechia 
