Autonomous System details

AS39790

Web4U s.r.o.  ·  web4u.cz

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AS39790 – Web4U s.r.o.

Field Value
Country Czechia
Website web4u.cz
Hosted domains 47,212
IPv4 addresses 5,120
IPv6 addresses 158,456,325,028,528,675,187,087,900,672
ASN type Hosting
Registry ripe
Allocated 20 years ago on Apr 25, 2006
Updated a year ago on Feb 14, 2025
Netblock Company Num of IPs
81.91.80.0/20 Web4U s.r.o. 4,096
81.91.80.0/21 Web4U s.r.o. 2,048
81.91.88.0/21 Web4U s.r.o. 2,048
185.14.224.0/22 Web4U s.r.o. 1,024
185.14.224.0/23 WEB4U - customers 512
Netblock Company
2001:1568::/32 Web4U s.r.o.
2001:1568::/33 Web4U s.r.o.
2001:1568:8000::/33 Web4U s.r.o.
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WHOIS Details


                                                ASHandle:       AS39790
                                                OrgID:          AS39790
                                                ASName:         AS39790
                                                ASNumber:       AS39790
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA

                                            
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Hosted Domains

There are 47,212 domain names hosted across 488 IP addresses on this ASN.

IP Address Domain Domains on this IP
81.91.86.14 █████████ 27,116
81.91.86.12 ██████████ 5,309
81.91.86.13 ██████████ 3,221
81.91.86.11 ██████████ 2,626
81.91.86.10 ███████ 675
81.91.84.215 ██████████ 471
81.91.84.107 ██████████ 365
81.91.84.51 ██████████ 345
81.91.92.221 ██████████ 330
81.91.82.42 ██████████ 268

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Useful for Cybersecurity

Peers

There are 26 peers for this ASN.

Peers Name
AS14840 BR.Digital Telecom
AS1764 Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH
AS198150 SIACOM JSC
AS199803 ComSource
AS212483 LEVEL EIGHTY-SIX COMMUNICATIONS LTD
AS22356 Durand do Brasil Ltda
AS24482 SG.GS
AS25248 RADIOKOMUNIKACE a.s.
AS263444 Open X Tecnologia Ltda
AS29504 Freenet Liberec, z.s.
AS32590 Valve Corporation
AS33891 Core-Backbone GmbH
AS36236 NetActuate, Inc
AS39120 Convergenze S.p.A.
AS40994 Hohl IT e.U.
AS44306 OMONIA d.o.o.
AS4455 IX Reach Ltd
AS47200 NIX.CZ z.s.p.o.
AS49544 i3D.net B.V
AS51184 Fonira Telekom GmbH
AS53062 ALT | GRUPO BRASIL TECPAR
AS6204 INTERKVM HOST SRL
AS6663 Euroweb Romania S.R.L.
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.

Upstreams

There are 3 upstreams for this ASN.

upstreams Name
AS199803 ComSource
AS25248 RADIOKOMUNIKACE a.s.
AS6939 Hurricane Electric LLC
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Downstreams

There are no downstreams for this ASN.

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Pingable IPs

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

IP Address ASN Details
2001:1568:92:28::1 AS39790 Web4U s.r.o. 0.55ms from Prague, CZ
2001:1568:93:60::1 AS39790 Web4U s.r.o. 0.55ms from Prague, CZ
81.91.95.115 AS39790 Web4U s.r.o. 0.51ms from Prague, CZ
2001:1568:13::216 AS39790 Web4U s.r.o. 0.49ms from Prague, CZ
2001:1568:f::1045 AS39790 Web4U s.r.o. 0.47ms from Prague, CZ
81.91.92.222 AS39790 Web4U s.r.o. 0.40ms from Prague, CZ
2001:1568:601::1 AS39790 Web4U s.r.o. 0.85ms from Prague, CZ
81.91.87.90 AS39790 Web4U s.r.o. 0.41ms from Prague, CZ
2001:1568::21 AS39790 Web4U s.r.o. 0.48ms from Prague, CZ
81.91.83.168 AS39790 Web4U s.r.o. 0.39ms from Prague, CZ
2001:1568:17::92 AS39790 Web4U s.r.o. 0.66ms from Prague, CZ
81.91.84.51 AS39790 Web4U s.r.o. 0.38ms from Prague, CZ
2001:1568:2::11 AS39790 Web4U s.r.o. 0.48ms from Prague, CZ
185.14.224.198 AS39790 Web4U s.r.o. 0.38ms from Prague, CZ
81.91.93.32 AS39790 Web4U s.r.o. 0.48ms from Prague, CZ
2001:1568:fd:104::236 AS39790 Web4U s.r.o. 0.52ms from Prague, CZ
2001:1568:19::3 AS39790 Web4U s.r.o. 0.57ms from Prague, CZ
2001:1568:ac17:2::138 AS39790 Web4U s.r.o. 0.58ms from Prague, CZ
81.91.91.27 AS39790 Web4U s.r.o. 0.42ms from Prague, CZ
2001:1568:b:145::1 AS39790 Web4U s.r.o. 0.50ms from Prague, CZ
2001:1568:91:108::1 AS39790 Web4U s.r.o. 0.48ms from Prague, CZ
81.91.82.19 AS39790 Web4U s.r.o. 0.39ms from Prague, CZ
2001:1568:d:289::f7 AS39790 Web4U s.r.o. 0.51ms from Prague, CZ
81.91.80.33 AS39790 Web4U s.r.o. 0.43ms from Prague, CZ
2001:1568:502::1 AS39790 Web4U s.r.o. 0.52ms 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
84.84.33.174 AS1136 KPN B.V. 1.08ms from Amsterdam, NL
74.178.196.222 AS8075 Microsoft Corporation 0.28ms from Amsterdam, NL
71.217.23.254 AS19901 Brightspeed 11.21ms from Ashburn, US
66.84.189.126 AS7029 Windstream Communications LLC 6.22ms from Ashburn, US
23.122.150.30 AS7018 AT&T Enterprises, LLC 2.29ms from Atlanta, US
43.209.244.14 AS16509 Amazon.com, Inc. 1.57ms from Bangkok, TH
163.171.105.46 AS4651 National Telecom Public Company Limited 0.78ms from Bangkok, TH
20.44.124.142 AS8075 Microsoft Corporation 0.33ms from Boydton, US
81.243.0.46 AS5432 Proximus NV 1.12ms from Brussels, BE
193.240.111.46 AS3549 Level 3 Parent, LLC 0.30ms from Frankfurt am Main, DE
110.138.47.30 AS7713 PT Telekomunikasi Indonesia 1.81ms from Jakarta, ID
128.234.159.14 AS25019 Saudi Telecom Company JSC 4.17ms from Jeddah, SA
136.33.178.158 AS16591 Google Fiber Inc. 0.72ms from Kansas City, US
60.49.177.254 AS4788 TM TECHNOLOGY SERVICES SDN. BHD. 1.90ms from Kuala Lumpur, MY
203.106.187.254 AS4788 TM TECHNOLOGY SERVICES SDN. BHD. 4.54ms from Kuala Lumpur, MY
202.187.183.78 AS9930 TTNET-MY 1.93ms from Kuala Lumpur, MY
93.5.121.46 AS15557 Societe Francaise Du Radiotelephone - SFR SA 7.43ms from Lyon, FR
181.136.120.78 AS13489 UNE EPM TELECOMUNICACIONES S.A. 8.58ms from Medellin, CO
75.146.157.142 AS7922 Comcast Cable Communications, LLC 5.12ms from Minneapolis, US
195.91.190.254 AS31363 JSC ER-Telecom Holding 1.03ms from Moscow, RU
46.50.199.110 AS21127 Joint Stock Company TransTeleCom 9.15ms from Novosibirsk, RU
133.18.40.174 AS24282 KAGOYA JAPAN Inc. 0.97ms from Osaka, JP
2.231.25.142 AS12874 Fastweb SpA 7.39ms from Rome, IT
96.74.67.238 AS7922 Comcast Cable Communications, LLC 6.24ms from San Jose, US
70.89.124.222 AS7922 Comcast Cable Communications, LLC 4.35ms from Seattle, US

Traceroute

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

$
traceroute -a -n -q1 -f4 81.91.81.71
traceroute to 81.91.81.71 (81.91.81.71): 64 hops max, 52 byte packets
4 [AS3356] 212.133.51.18 123.557 ms
5 *
6 *
7 *
8 [AS39790] 81.91.95.26 152.262 ms
9 [AS39790] 81.91.95.22 131.428 ms
10 [AS39790] 81.91.81.71 123.965 ms
Measurement taken from IPinfo ProbeNet in Mount Prospect, US
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 AS39790 at robtex.

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