Autonomous System details

AS39790

Web4U s.r.o.  ·  web4u.cz

Need more data or want to access it via API or data downloads? Sign up to get free access

Sign up for free ›

AS39790 – Web4U s.r.o.

Field Value
Country Czechia
Website web4u.cz
Hosted domains 47,562
IPv4 addresses 5,120
IPv6 addresses 158,456,325,028,528,676,000,000,000,000
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.
Get this data and more with IPinfo's powerful IP Ranges API - quickly and easily identify company-owned IP ranges.
IP Ranges API

WHOIS Details


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

                                            
Get this data and more with IPinfo's WHOIS product - effortless access to POCs, ORGs, and Networks, for actionable intelligence.

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 █████████ 21,682
81.91.86.12 ██████████ 4,483
81.91.86.13 █████████ 2,641
81.91.86.11 ██████████ 2,288
81.91.86.10 ███████ 627
81.91.84.215 ██████████ 438
81.91.84.107 ██████████ 334
81.91.84.51 ██████████ 312
81.91.92.221 █████████ 286
81.91.82.42 ██████████ 250

Discover all domains hosted on a single IP address with IPinfo's powerful Hosted Domains (Reverse IP) solution.
Useful for Cybersecurity

Peers

There are 25 peers for this ASN.

Peers Name
AS1764 Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH
AS198150 SIACOM JSC
AS199803 ComSource
AS212483 LEVEL EIGHTY-SIX COMMUNICATIONS LTD
AS24482 SG.GS
AS24940 Hetzner Online GmbH
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.
AS43733 Viva Armenia CJSC
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
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.

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

Pingable IPs

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

IP Address ASN Details
185.14.224.198 AS39790 Web4U s.r.o. 0.39ms from Prague, CZ
2001:1568:f::162:221 AS39790 Web4U s.r.o. 0.49ms from Prague, CZ
2001:1568:d::114 AS39790 Web4U s.r.o. 0.53ms from Prague, CZ
2001:1568:85:178::1 AS39790 Web4U s.r.o. 0.68ms from Prague, CZ
81.91.92.226 AS39790 Web4U s.r.o. 0.47ms from Prague, CZ
81.91.82.230 AS39790 Web4U s.r.o. 0.44ms from Prague, CZ
2001:1568:900::116 AS39790 Web4U s.r.o. 0.61ms from Prague, CZ
2001:1568::22 AS39790 Web4U s.r.o. 0.56ms from Prague, CZ
81.91.80.15 AS39790 Web4U s.r.o. 0.52ms from Prague, CZ
2001:1568:ffff:32::34 AS39790 Web4U s.r.o. 0.57ms from Prague, CZ
81.91.84.108 AS39790 Web4U s.r.o. 0.43ms from Prague, CZ
2001:1568:91:152::1 AS39790 Web4U s.r.o. 0.51ms from Prague, CZ
2001:1568:ac17:2::138 AS39790 Web4U s.r.o. 0.63ms from Prague, CZ
2001:1568:502::1 AS39790 Web4U s.r.o. 0.61ms from Prague, CZ
2001:1568:17::92 AS39790 Web4U s.r.o. 0.68ms from Prague, CZ
81.91.85.11 AS39790 Web4U s.r.o. 0.42ms from Prague, CZ
2001:1568:601::1 AS39790 Web4U s.r.o. 1.01ms from Prague, CZ
2001:1568:82:1::230 AS39790 Web4U s.r.o. 0.61ms from Prague, CZ
2001:1568:84:131::1 AS39790 Web4U s.r.o. 0.57ms from Prague, CZ
2001:1568:13::317 AS39790 Web4U s.r.o. 0.50ms from Prague, CZ
2001:1568:92:41:3::1 AS39790 Web4U s.r.o. 0.61ms from Prague, CZ
81.91.86.17 AS39790 Web4U s.r.o. 0.43ms from Prague, CZ
81.91.89.43 AS39790 Web4U s.r.o. 0.56ms from Prague, CZ
2001:1568:9::376 AS39790 Web4U s.r.o. 0.78ms from Prague, CZ
81.91.91.91 AS39790 Web4U s.r.o. 0.43ms 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
100.40.26.94 AS701 Verizon Business 1.90ms from Boston, US
62.182.57.254 AS34762 Combell NV 1.08ms from Brussels, BE
64.210.138.78 AS29789 Reflected Networks, Inc. 0.78ms from Chicago, US
85.195.26.254 AS35706 Net at Once Sweden AB 6.03ms from Copenhagen, DK
189.101.65.190 AS28573 Claro NXT Telecomunicacoes Ltda 7.34ms from Curitiba, BR
67.64.242.62 AS7018 AT&T Enterprises, LLC 2.80ms from Dallas, US
109.255.201.110 AS6830 Liberty Global Europe Holding B.V. 3.44ms from Dublin, IE
46.89.59.46 AS3320 Deutsche Telekom AG 4.09ms from Frankfurt am Main, DE
89.125.60.206 AS57043 HOSTKEY B.V. 0.22ms from Frankfurt am Main, DE
77.0.16.62 AS6805 Telefonica Germany GmbH & Co.OHG 2.38ms from Hamburg, DE
71.221.249.254 AS19901 Brightspeed 1.99ms from Houston, US
220.117.134.254 AS4766 Korea Telecom 1.28ms from Incheon, KR
222.133.84.46 AS4837 CHINA UNICOM China169 Backbone 7.73ms from Jinan, CN
116.55.149.110 AS4134 CHINANET BACKBONE 12.55ms from Kunming, CN
204.102.50.254 AS2152 CENIC 2.67ms from Los Angeles, US
172.95.166.222 AS5650 Frontier Communications of America, Inc. 3.22ms from Los Angeles, US
185.211.182.142 AS213005 Invermae Solutions SL 1.15ms from Madrid, ES
121.232.87.30 AS4134 CHINANET BACKBONE 5.72ms from Nanjing, CN
88.33.164.110 AS3269 Telecom Italia S.p.A. 14.66ms from Naples, IT
65.115.133.62 AS209 CenturyLink Communications, LLC 1.03ms from Orlando, US
52.87.128.158 AS14618 Amazon.com, Inc. 0.23ms from Reston, US
52.20.14.254 AS14618 Amazon.com, Inc. 0.40ms from Reston, US
187.108.244.46 AS263415 EGR NET TELECOMUNICACOES LTDA 9.15ms from Sao Paulo, BR
128.91.48.78 AS55 University of Pennsylvania 2.74ms from Secaucus, US
211.80.55.254 AS4538 China Education and Research Network Center 5.25ms from Shanghai, CN

Traceroute

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

$
traceroute -a -n -q1 -f4 81.91.92.152
traceroute to 81.91.92.152 (81.91.92.152): 64 hops max, 52 byte packets
4 [] 91.210.16.49 0.694 ms
5 *
6 [] 185.138.110.51 0.658 ms
7 [AS39790] 81.91.95.10 0.626 ms
8 *
9 [AS39790] 81.91.92.152 0.641 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.

Data built with users in mind: reliable, accurate, and easy-to-use

Discover why industry-leading companies around the globe love our data. IPinfo's accurate insights fuel use cases from cybersecurity, data enrichment, web personalization, and much more.

IPinfo for all your IP geolocation needs

Our IP tools

Explore all tools
What is my IP

What is my IP

Test our data accuracy by viewing insights from your IP address.

See your IP address
Map IPs

Map IPs

Paste up to 500,000 IPs to see where they're located on a map.

Try Map IPs
Summarize IPs

Summarize IPs

Use our data visualization tool to create a visual overview of multiple IPs.

Try Summarize IPs