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 2 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.
Get this data and more insights on related domains, allocation dates, registry names, IP counts with IPinfo's IP-to-ASN product.

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
78.31.29.1 AS43757 ICZ a.s. 1.24ms from Prague, CZ
78.31.31.254 AS43757 ICZ a.s. 1.20ms from Prague, CZ
78.31.27.89 AS43757 ICZ a.s. 1.17ms from Prague, CZ
78.31.25.2 AS43757 ICZ a.s. 1.18ms from Prague, CZ
2001:67c:1578:8101:0:1:0:2 AS43757 ICZ a.s. 1.16ms from Prague, CZ
192.108.126.10 AS43757 ICZ a.s. 2.32ms from Bratislava, SK
78.31.26.66 AS43757 ICZ a.s. 1.17ms from Prague, CZ
78.31.24.254 AS43757 ICZ a.s. 0.97ms 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
120.5.117.205 AS4837 CHINA UNICOM China169 Backbone 6.21ms from Beijing, CN
177.75.5.45 AS28178 Networld Provedor e Servicos de Internet Ltda 0.36ms from Brasilia, BR
196.217.109.205 AS36903 Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM 4.00ms from Casablanca, MA
166.155.186.205 AS6167 Verizon Business 15.38ms from Dallas, US
81.154.104.93 AS2856 British Telecommunications PLC 1.62ms from London, GB
184.94.100.29 AS6461 Zayo Bandwidth 0.67ms from Montreal, CA
212.223.36.221 AS8741 Ratiokontakt GmbH 1.00ms from Nuernberg, DE
109.10.85.93 AS15557 Societe Francaise Du Radiotelephone - SFR SA 10.57ms from Paris, FR
90.20.14.13 AS3215 Orange S.A. 16.98ms from Paris, FR
3.209.58.237 AS14618 Amazon.com, Inc. 0.15ms from Reston, US
40.131.38.173 AS7029 Windstream Communications LLC 0.90ms from Secaucus, US
38.17.21.61 AS174 Cogent Communications, LLC 0.70ms from Toronto, CA
67.193.124.93 AS7992 Cogeco Connexion Inc. 7.99ms from Toronto, CA
102.152.141.157 AS327934 SOCIETE NATIONALE DES TELECOMMUNICATIONS (Tunisie Telecom) 1.65ms from Tunis, TN
185.109.20.253 AS211641 ArsTelecom Ltd. 4.80ms from Vladivostok, RU
23.38.28.253 AS16625 Akamai Technologies, Inc. 0.14ms from Amsterdam, NL
137.117.68.45 AS8075 Microsoft Corporation 0.43ms from Ashburn, US
178.26.20.253 AS3209 Vodafone GmbH 5.81ms from Berlin, DE
44.233.142.13 AS16509 Amazon.com, Inc. 0.16ms from Boardman, US
16.146.195.125 AS16509 Amazon.com, Inc. 0.16ms from Boardman, US
84.47.107.29 AS6855 Slovak Telekom, a.s. 5.94ms from Bratislava, SK
179.108.250.205 AS263276 BBG TELECOM LTDA 12.19ms from Fortaleza, BR
144.34.103.61 AS396969 Strada Communications L.L.C. 11.23ms from Grand Rapids, US
68.203.36.45 AS11427 Charter Communications Inc 6.18ms from Houston, US
103.182.245.237 AS17995 PT iForte Global Internet 11.20ms from Jakarta, ID

Traceroute

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

$
traceroute -a -n -q1 -m12 78.31.30.113
traceroute to 78.31.30.113 (78.31.30.113): 12 hops max, 52 byte packets
1 [AS59580] 193.142.30.1 99.885 ms
2 [AS1299] 62.115.193.14 209.838 ms
3 *
4 *
5 [AS1299] 62.115.32.255 206.828 ms
6 *
7 [AS13036] 193.85.231.206 206.895 ms
8 [AS43757] 78.31.24.54 207.312 ms
9 [AS43757] 78.31.24.49 207.409 ms
10 *
11 *
12 *
Measurement taken from IPinfo ProbeNet in Tehran, IR
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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