AS number 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 46,487
Number of IPv4 5,120
Number of IPv6 158,456,325,028,528,675,187,087,900,672
ASN type Hosting
Registry ripe
Allocated 19 years ago on Apr 25, 2006
Updated 7 months 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 46,487 domain names hosted across 490 IP addresses on this ASN.

IP Address Domain Domains on this IP
81.91.86.14 █████████ 26,268
81.91.86.12 ██████████ 5,393
81.91.86.13 ████████ 3,292
81.91.86.11 ██████████ 2,649
81.91.86.10 ███████ 682
81.91.84.215 ██████████ 458
81.91.84.107 ██████████ 353
81.91.84.51 ██████████ 352
81.91.92.221 ██████████ 341
81.91.82.42 ██████████ 276

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Useful for Cybersecurity

Peers

There are 24 peers for this ASN.

Peers Name
AS14840 BR.Digital Provider
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.
AS33891 Core-Backbone GmbH
AS36236 NetActuate, Inc
AS39120 Convergenze S.p.A.
AS40994 Hohl IT e.U.
AS4455 IX Reach Ltd
AS47200 NIX.CZ z.s.p.o.
AS49544 i3D.net B.V
AS5405 Inter.link GmbH
AS57463 NetIX Communications JSC
AS6204 INTERKVM HOST SRL
AS6881 NIX.CZ z.s.p.o.
AS6939 Hurricane Electric LLC
AS8218 Zayo Infrastructure France SA
AS9498 BHARTI Airtel Ltd.
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

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

IP Address ASN Details
2001:1568:ac17:2::138 AS39790 Web4U s.r.o. 0.59ms from Prague, CZ
2001:1568:2::18 AS39790 Web4U s.r.o. 0.49ms from Prague, CZ
81.91.82.19 AS39790 Web4U s.r.o. 0.38ms from Prague, CZ
2001:1568:13::317 AS39790 Web4U s.r.o. 0.52ms from Prague, CZ
2001:1568:d::187 AS39790 Web4U s.r.o. 0.54ms from Prague, CZ
81.91.91.27 AS39790 Web4U s.r.o. 0.43ms from Prague, CZ
81.91.95.114 AS39790 Web4U s.r.o. 0.49ms from Prague, CZ
81.91.89.43 AS39790 Web4U s.r.o. 0.68ms from Prague, CZ
81.91.86.21 AS39790 Web4U s.r.o. 0.42ms from Prague, CZ
81.91.83.136 AS39790 Web4U s.r.o. 0.39ms from Prague, CZ
2001:1568:85:178::1 AS39790 Web4U s.r.o. 0.66ms from Prague, CZ
81.91.80.117 AS39790 Web4U s.r.o. 0.39ms from Prague, CZ
81.91.85.19 AS39790 Web4U s.r.o. 0.42ms from Prague, CZ
2001:1568:82:1::230 AS39790 Web4U s.r.o. 0.58ms from Prague, CZ
2001:1568:ffff:: AS39790 Web4U s.r.o. 0.57ms from Prague, CZ
81.91.87.86 AS39790 Web4U s.r.o. 0.39ms from Prague, CZ
2001:1568:19::4 AS39790 Web4U s.r.o. 0.64ms from Prague, CZ
81.91.93.22 AS39790 Web4U s.r.o. 0.50ms from Prague, CZ
2001:1568:f::162:221 AS39790 Web4U s.r.o. 0.56ms from Prague, CZ
2001:1568:84:210::1 AS39790 Web4U s.r.o. 0.61ms from Prague, CZ
2001:1568:b::145 AS39790 Web4U s.r.o. 0.50ms from Prague, CZ
2001:1568:91:21::1 AS39790 Web4U s.r.o. 0.53ms from Prague, CZ
2001:1568:92:32::175 AS39790 Web4U s.r.o. 0.58ms from Prague, CZ
185.14.224.198 AS39790 Web4U s.r.o. 0.40ms from Prague, CZ
81.91.84.51 AS39790 Web4U s.r.o. 0.39ms 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
71.219.136.254 AS19901 Brightspeed 6.71ms from Ashburn, US
209.164.248.254 AS20222 Plant Telephone Company 6.52ms from Atlanta, US
76.227.135.142 AS7018 AT&T Enterprises, LLC 2.02ms from Chicago, US
212.178.174.46 AS44869 FIBIA P/S 2.77ms from Copenhagen, DK
67.64.242.62 AS7018 AT&T Enterprises, LLC 2.71ms from Dallas, US
67.41.114.158 AS209 CenturyLink Communications, LLC 17.47ms from Denver, US
50.194.136.190 AS7922 Comcast Cable Communications, LLC 6.95ms from Denver, US
95.91.40.254 AS3209 Vodafone GmbH 1.78ms from Frankfurt am Main, DE
79.251.0.190 AS3320 Deutsche Telekom AG 1.63ms from Frankfurt am Main, DE
193.240.111.46 AS3549 Level 3 Parent, LLC 0.32ms from Frankfurt am Main, DE
181.114.10.30 AS52286 LIBERTY NETWORKS GUATEMALA, LIMITADA 0.57ms from Guatemala City, GT
12.245.144.14 AS7018 AT&T Enterprises, LLC 1.91ms from Houston, US
202.185.109.94 AS9930 TTNET-MY 2.14ms from Kuala Lumpur, MY
88.27.137.238 AS3352 TELEFONICA DE ESPANA S.A.U. 2.47ms from Madrid, ES
117.223.81.254 AS9829 National Internet Backbone 8.56ms from Mumbai, IN
5.3.183.254 AS51570 JSC "ER-Telecom Holding" 0.91ms from Saint Petersburg, RU
27.105.209.174 AS18182 Sony Network Taiwan Limited 0.20ms from Sao Paulo, BR
34.95.189.142 AS396982 Google LLC 0.10ms from Sao Paulo, BR
121.183.52.254 AS4766 Korea Telecom 7.17ms from Seoul, KR
112.165.109.254 AS4766 Korea Telecom 4.87ms from Seoul, KR
106.15.7.62 AS37963 Hangzhou Alibaba Advertising Co.,Ltd. 1.57ms from Shanghai, CN
62.46.108.94 AS8447 A1 Telekom Austria AG 3.39ms from Vienna, AT
50.250.58.142 AS7922 Comcast Cable Communications, LLC 9.06ms from Boston, US
73.142.144.46 AS7922 Comcast Cable Communications, LLC 9.71ms from Boston, US
66.17.153.254 AS46281 Wi-Five Broadband 1.84ms from Dallas, 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 81.91.85.208
traceroute to 81.91.85.208 (81.91.85.208): 64 hops max, 52 byte packets
4 [AS3356] 212.133.51.18 47.168 ms
5 *
6 *
7 *
8 [AS39790] 81.91.95.26 66.847 ms
9 [AS39790] 81.91.95.22 55.926 ms
10 [AS39790] 81.91.85.208 47.388 ms
Measurement taken from IPinfo ProbeNet in Helsinki, FI
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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