Autonomous System details

AS43757

ICZ a.s.  ·  i.cz

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AS43757 – ICZ a.s.

Field Value
Country Czechia
Website i.cz
Hosted domains 84
IPv4 addresses 2,304
IPv6 addresses 1,208,925,819,614,629,174,706,176
ASN type Business
Registry ripe
Allocated 18 years ago on Sep 24, 2007
Updated 4 months ago on Oct 02, 2025
Netblock Company Num of IPs
78.31.24.0/21 ICZ a.s. 2,048
192.108.126.0/24 ICZ a.s. 256
Netblock Company
2001:67c:1578::/48 ICZ a.s.
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WHOIS Details


                                                ASHandle:       AS43757
                                                OrgID:          AS43757
                                                ASName:         AS43757
                                                ASNumber:       AS43757
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA

                                            
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Hosted Domains

There are 84 domain names hosted across 3 IP addresses on this ASN.

IP Address Domain Domains on this IP
78.31.26.115 ██████████ 76
78.31.27.181 ██████████ 10
78.31.27.187 ████████ 1

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Useful for Cybersecurity

Peers

There are 3 peers for this ASN.

Peers Name
AS5578 SWAN, a.s.
AS5610 O2 Czech Republic, a.s.
AS6855 Slovak Telekom, a.s.
Get this data and more insights on related domains, allocation dates, registry names, IP counts with IPinfo's IP-to-ASN product.

Upstreams

There are 3 upstreams for this ASN.

upstreams Name
AS5578 SWAN, a.s.
AS5610 O2 Czech Republic, a.s.
AS6855 Slovak Telekom, a.s.
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Downstreams

There are no downstreams for this ASN.

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Pingable IPs

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

IP Address ASN Details
78.31.31.254 AS43757 ICZ a.s. 1.29ms from Prague, CZ
78.31.26.66 AS43757 ICZ a.s. 1.19ms from Prague, CZ
78.31.29.1 AS43757 ICZ a.s. 1.31ms from Prague, CZ
192.108.126.3 AS43757 ICZ a.s. 2.33ms from Bratislava, SK
78.31.25.1 AS43757 ICZ a.s. 1.17ms from Prague, CZ
2001:67c:1578:8101:0:1:0:2 AS43757 ICZ a.s. 1.15ms from Prague, CZ
78.31.27.249 AS43757 ICZ a.s. 1.20ms from Prague, CZ
78.31.24.2 AS43757 ICZ a.s. 0.99ms 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
49.44.142.237 AS55836 Reliance Jio Infocomm Limited 1.23ms from Chennai, IN
108.66.191.157 AS7018 AT&T Enterprises, LLC 2.36ms from Dallas, US
134.149.85.189 AS8075 Microsoft Corporation 0.14ms from Dublin, IE
86.186.169.221 AS2856 British Telecommunications PLC 2.21ms from London, GB
192.3.240.237 AS36352 HostPapa 0.30ms from Los Angeles, US
98.208.137.29 AS7922 Comcast Cable Communications, LLC 8.06ms from Miami, US
37.213.146.221 AS6697 Republican Unitary Telecommunication Enterprise Beltelecom 5.07ms from Minsk, BY
68.202.18.189 AS33363 Charter Communications, Inc 7.80ms from Orlando, US
34.200.43.205 AS14618 Amazon.com, Inc. 0.22ms from Reston, US
14.78.237.253 AS4766 Korea Telecom 8.88ms from Seoul, KR
117.185.255.45 AS9808 China Mobile Communications Group Co., Ltd. 2.33ms from Shanghai, CN
153.204.1.109 AS4713 NTT DOCOMO BUSINESS,Inc. 3.63ms from Tokyo, JP
119.4.50.109 AS4837 CHINA UNICOM China169 Backbone 2.19ms from Chengdu, CN
1.181.173.237 AS4134 CHINANET-BACKBONE 14.00ms from Hohhot, CN
116.120.204.157 AS9318 SK Broadband Co Ltd 7.11ms from Incheon, KR
195.64.243.125 AS50115 Lekol LLC 7.76ms from Kyiv, UA
103.130.159.125 AS140039 Master Communication Pvt. Ltd. 1.86ms from Lahore, PK
97.221.157.157 AS6167 Verizon Business 10.91ms from Miami, US
5.143.179.205 AS15468 PJSC Rostelecom 9.46ms from Moscow, RU
90.20.14.13 AS3215 Orange S.A. 16.94ms from Paris, FR
13.210.146.13 AS16509 Amazon.com, Inc. 0.09ms from Sydney, AU
218.171.15.173 AS3462 Data Communication Business Group 5.03ms from Taichung, TW
213.127.170.157 AS33915 Vodafone Libertel B.V. 4.93ms from Amsterdam, NL
73.52.230.237 AS7922 Comcast Cable Communications, LLC 13.14ms from Ashburn, US
101.51.166.109 AS23969 TOT Public Company Limited 3.05ms from Bangkok, TH

Traceroute

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

$
traceroute -a -n -q1 -f2 -m10 78.31.30.147
traceroute to 78.31.30.147 (78.31.30.147): 10 hops max, 52 byte packets
2 [AS15169] 192.178.252.182 255.836 ms
3 *
4 [AS5610] 194.228.21.251 251.177 ms
5 [AS5610] 80.188.182.114 265.774 ms
6 [AS43757] 78.31.24.54 251.085 ms
7 [AS43757] 78.31.24.49 250.499 ms
8 *
9 *
10 *
Measurement taken from IPinfo ProbeNet in Seoul, KR
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 AS43757 at robtex.

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