Autonomous System details

AS39790

Web4U s.r.o.  ·  web4u.cz

Czechia

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AS39790 – Web4U s.r.o.

Field Value
Country Czechia
Website web4u.cz
Hosted domains 47,026
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 10 months ago on Feb 14, 2025

IP Ranges

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

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                                                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 47,026 domain names hosted across 492 IP addresses on this ASN.

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IP Address Domain Domains on this IP
81.91.86.14 █████████ 26,904
81.91.86.12 ██████████ 5,322
81.91.86.13 ██████████ 3,228
81.91.86.11 ██████████ 2,634
81.91.86.10 ███████ 677
81.91.84.215 ██████████ 469
81.91.84.107 ██████████ 367
81.91.84.51 ██████████ 345
81.91.92.221 ██████████ 331
81.91.82.42 ██████████ 268

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Peers

There are 28 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
AS5405 Inter.link GmbH
AS57463 NetIX Communications JSC
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
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ASN API & Database

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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ASN API & Database

Pingable IPs

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

IP Address ASN Details
2001:1568:84:131::1 AS39790 Web4U s.r.o. 0.61ms from Prague, CZ
81.91.95.37 AS39790 Web4U s.r.o. 0.55ms from Prague, CZ
2001:1568:d::187 AS39790 Web4U s.r.o. 0.53ms from Prague, CZ
2001:1568:2::17 AS39790 Web4U s.r.o. 0.51ms from Prague, CZ
2001:1568:900::116 AS39790 Web4U s.r.o. 0.69ms from Prague, CZ
2001:1568:17::92 AS39790 Web4U s.r.o. 0.68ms from Prague, CZ
81.91.89.44 AS39790 Web4U s.r.o. 0.72ms from Prague, CZ
81.91.81.11 AS39790 Web4U s.r.o. 0.45ms from Prague, CZ
2001:1568:b::145 AS39790 Web4U s.r.o. 0.53ms from Prague, CZ
2001:1568:13::216 AS39790 Web4U s.r.o. 0.51ms from Prague, CZ
2001:1568:91:369::30 AS39790 Web4U s.r.o. 0.51ms from Prague, CZ
2001:1568:502::1 AS39790 Web4U s.r.o. 0.58ms from Prague, CZ
81.91.91.39 AS39790 Web4U s.r.o. 0.43ms from Prague, CZ
2001:1568:f::1045 AS39790 Web4U s.r.o. 0.52ms from Prague, CZ
2001:1568:92:41:2::1 AS39790 Web4U s.r.o. 0.54ms from Prague, CZ
81.91.80.32 AS39790 Web4U s.r.o. 0.46ms from Prague, CZ
81.91.93.60 AS39790 Web4U s.r.o. 0.55ms from Prague, CZ
81.91.85.17 AS39790 Web4U s.r.o. 0.40ms from Prague, CZ
2001:1568:9::1 AS39790 Web4U s.r.o. 0.79ms from Prague, CZ
2001:1568:602::1 AS39790 Web4U s.r.o. 0.81ms from Prague, CZ
2001:1568:ac17:2::138 AS39790 Web4U s.r.o. 0.53ms from Prague, CZ
185.14.224.198 AS39790 Web4U s.r.o. 0.39ms from Prague, CZ
81.91.92.84 AS39790 Web4U s.r.o. 0.43ms from Prague, CZ
2001:1568:601::1 AS39790 Web4U s.r.o. 0.78ms from Prague, CZ
2001:1568:fd::241 AS39790 Web4U s.r.o. 0.51ms 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
45.95.35.190 AS212238 Datacamp Limited 1.01ms from Amsterdam, NL
73.236.142.174 AS7922 Comcast Cable Communications, LLC 9.77ms from Ashburn, US
209.164.248.254 AS20222 Plant Telephone Company 6.61ms from Atlanta, US
96.77.81.46 AS7922 Comcast Cable Communications, LLC 4.83ms from Atlanta, US
123.123.200.94 AS4808 China Unicom Beijing Province Network 3.50ms from Beijing, CN
12.55.112.46 AS7018 AT&T Enterprises, LLC 5.89ms from Chicago, US
174.97.28.46 AS10796 Charter Communications Inc 8.16ms from Columbus, US
217.234.33.46 AS3320 Deutsche Telekom AG 4.98ms from Frankfurt am Main, DE
174.4.242.110 AS6327 Shaw Communications 4.81ms from Kelowna, CA
175.138.128.254 AS4788 TM TECHNOLOGY SERVICES SDN. BHD. 1.90ms from Kuala Lumpur, MY
140.248.143.14 AS54113 Fastly, Inc. 0.05ms from Lisbon, PT
64.32.3.46 AS46844 Sharktech 0.18ms from Los Angeles, US
222.107.216.190 AS4766 Korea Telecom 1.16ms from Seoul, KR
222.238.79.46 AS9318 SK Broadband Co Ltd 5.93ms from Seoul, KR
47.102.218.158 AS37963 Hangzhou Alibaba Advertising Co.,Ltd. 3.89ms from Shanghai, CN
184.102.145.254 AS19901 Brightspeed 13.27ms from St. Louis, US
43.163.223.46 AS132203 Tencent Building, Kejizhongyi Avenue 1.18ms from Tokyo, JP
27.116.10.222 AS9378 JCOM Co., Ltd. 10.73ms from Tokyo, JP
78.157.69.126 AS21211 Penkiu kontinentu komunikaciju centras, Ltd. 0.43ms from Vilnius, LT
40.121.239.110 AS8075 Microsoft Corporation 0.39ms from Ashburn, US
71.69.21.94 AS11426 Charter Communications Inc 18.03ms from Charlotte, US
66.90.215.254 AS7459 Grande Communications Networks, LLC 3.52ms from Dallas, US
52.173.182.238 AS8075 Microsoft Corporation 0.22ms from Des Moines, US
36.138.101.190 AS9808 China Mobile Communications Group Co., Ltd. 0.57ms from Hangzhou, CN
129.208.146.62 AS25019 Saudi Telecom Company JSC 7.28ms from Jeddah, SA

Traceroute

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

$
traceroute -a -n -q1 -f4 81.91.85.71
traceroute to 81.91.85.71 (81.91.85.71): 64 hops max, 52 byte packets
4 [AS3356] 212.133.51.18 10.432 ms
5 *
6 *
7 *
8 [AS39790] 81.91.95.26 25.944 ms
9 *
10 [AS39790] 81.91.85.71 10.653 ms
Measurement taken from IPinfo ProbeNet in Budapest, HU
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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