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 47,562
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 47,562 domain names hosted across 488 IP addresses on this ASN.

IP Address Domain Domains on this IP
81.91.86.14 █████████ 27,519
81.91.86.12 ██████████ 5,305
81.91.86.13 ██████████ 3,215
81.91.86.11 ██████████ 2,621
81.91.86.10 ███████ 672
81.91.84.215 ██████████ 476
81.91.84.107 ██████████ 366
81.91.84.51 ██████████ 344
81.91.92.221 █████████ 327
81.91.82.42 ██████████ 267

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Useful for Cybersecurity

Peers

There are 23 peers for this ASN.

Peers Name
AS1764 Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH
AS198150 SIACOM JSC
AS199803 ComSource s.r.o.
AS212483 LEVEL EIGHTY-SIX COMMUNICATIONS LTD
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
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 s.r.o.
AS25248 RADIOKOMUNIKACE a.s.
AS6939 Hurricane Electric LLC
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

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

IP Address ASN Details
2001:1568:b:145::1 AS39790 Web4U s.r.o. 0.49ms from Prague, CZ
2001:1568:84:131::1 AS39790 Web4U s.r.o. 0.56ms from Prague, CZ
2001:1568:91:21::1 AS39790 Web4U s.r.o. 0.54ms from Prague, CZ
81.91.86.35 AS39790 Web4U s.r.o. 0.40ms from Prague, CZ
2001:1568:900::116 AS39790 Web4U s.r.o. 0.59ms from Prague, CZ
2001:1568:17::92 AS39790 Web4U s.r.o. 0.68ms from Prague, CZ
81.91.93.59 AS39790 Web4U s.r.o. 0.48ms from Prague, CZ
2001:1568:82:1::230 AS39790 Web4U s.r.o. 0.58ms from Prague, CZ
2001:1568:f::162:221 AS39790 Web4U s.r.o. 0.52ms from Prague, CZ
81.91.95.34 AS39790 Web4U s.r.o. 0.50ms from Prague, CZ
2001:1568:ffff:32::34 AS39790 Web4U s.r.o. 0.51ms from Prague, CZ
81.91.85.17 AS39790 Web4U s.r.o. 0.39ms from Prague, CZ
2001:1568:602::1 AS39790 Web4U s.r.o. 0.76ms from Prague, CZ
2001:1568:601::1 AS39790 Web4U s.r.o. 0.80ms from Prague, CZ
2001:1568:ac17:2::138 AS39790 Web4U s.r.o. 0.64ms from Prague, CZ
81.91.81.12 AS39790 Web4U s.r.o. 0.45ms from Prague, CZ
81.91.84.51 AS39790 Web4U s.r.o. 0.41ms from Prague, CZ
81.91.91.109 AS39790 Web4U s.r.o. 0.40ms from Prague, CZ
81.91.83.228 AS39790 Web4U s.r.o. 0.40ms from Prague, CZ
2001:1568:93:40::1 AS39790 Web4U s.r.o. 0.59ms from Prague, CZ
2001:1568:92:41:3::1 AS39790 Web4U s.r.o. 0.56ms from Prague, CZ
2001:1568:19::4 AS39790 Web4U s.r.o. 0.61ms from Prague, CZ
81.91.82.40 AS39790 Web4U s.r.o. 0.38ms from Prague, CZ
81.91.80.16 AS39790 Web4U s.r.o. 0.48ms from Prague, CZ
2001:1568:fd:104::235 AS39790 Web4U s.r.o. 0.54ms 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
108.31.190.206 AS701 Verizon Business 2.31ms from Ashburn, US
108.156.104.222 AS16509 Amazon.com, Inc. 0.08ms from Chicago, US
94.205.142.254 AS15802 Emirates Integrated Telecommunications Company PJSC 2.70ms from Dubai, AE
108.131.137.174 AS16509 Amazon.com, Inc. 0.42ms from Dublin, IE
92.198.194.126 AS20676 Plusnet GmbH 11.77ms from Frankfurt am Main, DE
47.55.63.30 AS855 Bell Canada 7.59ms from Fredericton, CA
139.13.174.254 AS680 Verein zur Foerderung eines Deutschen Forschungsnetzes e.V. 14.33ms from Hamburg, DE
91.150.10.174 AS42343 Karjaan Puhelin Oy 2.38ms from Helsinki, FI
58.153.250.254 AS4760 HKT Limited 0.70ms from Hong Kong, HK
116.49.161.254 AS4760 HKT Limited 0.88ms from Hong Kong, HK
168.70.38.254 AS4760 HKT Limited 1.14ms from Hong Kong, HK
118.62.136.254 AS4766 Korea Telecom 5.41ms from Incheon, KR
195.123.123.254 AS25174 Osokorky Online LLC 1.19ms from Kyiv, UA
212.229.86.238 AS5378 Vodafone Limited 3.45ms from London, GB
90.198.211.206 AS5607 Sky UK Limited 3.84ms from London, GB
51.48.179.222 AS16509 Amazon.com, Inc. 5.69ms from Madrid, ES
99.122.156.78 AS7018 AT&T Enterprises, LLC 2.79ms from Miami, US
90.25.85.190 AS3215 Orange S.A. 3.51ms from Paris, FR
24.137.227.62 AS14638 Liberty Communications of Puerto Rico LLC 0.34ms from San Juan, PR
65.102.179.254 AS209 CenturyLink Communications, LLC 0.80ms from Seattle, US
221.150.96.78 AS4766 Korea Telecom 1.06ms from Seoul, KR
61.81.199.254 AS4766 Korea Telecom 4.52ms from Seoul, KR
219.68.89.254 AS9416 Hoshin Multimedia Center Inc. 4.78ms from Taipei, TW
171.122.1.206 AS4837 CHINA UNICOM China169 Backbone 7.90ms from Taiyuan, CN
126.120.63.126 AS17676 SoftBank Corp. 8.30ms from Tokyo, JP

Traceroute

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

$
traceroute -a -n -q1 -f2 81.91.86.17
traceroute to 81.91.86.17 (81.91.86.17): 64 hops max, 52 byte packets
2 [] 91.210.16.49 0.278 ms
3 [] 185.138.110.47 0.557 ms
4 [] 185.138.110.51 0.797 ms
5 [AS39790] 81.91.95.26 25.865 ms
6 *
7 [AS39790] 81.91.86.17 0.503 ms
Measurement taken from IPinfo ProbeNet in Prague, CZ
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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