1. All IP Ranges
  2. 81.0.0.0/8
  3. 81.91.0.0/16
  4. AS39790  | 81.91.88.0/21

81.91.88.0/21

AS39790  ·  Web4U s.r.o.

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Summary

Country Czechia
Domain web4u.cz
ASN AS39790
Parent Range 81.91.80.0/20
Registry RIPE
ID CZ-WEB4USRO-20060425

WHOIS Details

inetnum:        81.91.80.0 - 81.91.95.255
netname:        CZ-WEB4USRO-20060425
country:        CZ
org:            ORG-WS296-RIPE
admin-c:        WM3536-RIPE
tech-c:         WM3536-RIPE
status:         ALLOCATED PA
mnt-by:         MNT-WEB4U
mnt-by:         RIPE-NCC-HM-MNT
created:        2022-09-28T14:32:39Z
last-modified:  2022-09-28T14:32:39Z
source:         RIPE
abuse-email:    abuse@web4u.cz
abuse-c:        AR68991-RIPE
abuse-org:      ORG-WS296-RIPE

organisation:   ORG-WS296-RIPE
org-name:       Web4U s.r.o.
country:        CZ
org-type:       LIR
address:        Mahlerovy sady 1
address:        13000
address:        Praha 3
address:        CZECH REPUBLIC
phone:          +420270001456
e-mail:         ripe@web4u.cz
admin-c:        WM3536-RIPE
tech-c:         WM3536-RIPE
abuse-c:        AR68991-RIPE
mnt-ref:        MNT-WEB4U
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         MNT-WEB4U
created:        2022-09-20T07:29:12Z
last-modified:  2022-09-20T07:29:13Z
source:         RIPE
abuse-email:    abuse@web4u.cz
abuse-c:        AR68991-RIPE
abuse-org:      undefined

role:           WEB4U network operations
address:        CZECH REPUBLIC
address:        Praha 3
address:        13000
address:        Mahlerovy sady 1
phone:          +420270001456
e-mail:         praha@web4u.cz
admin-c:        FP15631-RIPE
tech-c:         FP15631-RIPE
abuse-mailbox:  abuse@web4u.cz
nic-hdl:        WM3536-RIPE
mnt-by:         MNT-WEB4U
created:        2022-09-20T07:29:12Z
last-modified:  2022-10-17T12:21:14Z
source:         RIPE

route:          81.91.80.0/21
origin:         AS39790
mnt-by:         MNT-WEB4U
created:        2024-05-16T12:05:41Z
last-modified:  2024-05-16T12:05:41Z
source:         RIPE

Overlapping Ranges

BGP prefixes that contain 81.91.88.0/21

Range ASN Company Num of IPs
81.91.80.0/20 AS39790 Web4U s.r.o. 4,096

Nearby Ranges

BGP prefixes that overlap with 81.91.0.0/16

Range ASN Company Num of IPs
81.91.32.0/19 AS8359 MTS PJSC 8,192
81.91.0.0/20 AS197308 Telia Cygate AB 4,096
81.91.112.0/20 AS12180 ALKIM BASIN YAYIN ILETISIM LTD. STI. 4,096
81.91.144.0/20 AS206065 Tose'h Fanavari Ertebabat Pasargad Arian Co. PJS 4,096
81.91.224.0/20 AS28683 SOCIETE BENINOISE D'INFRASTRUCTURES NUMERIQUES 4,096
81.91.192.0/20 AS29009 UK Broadband Ltd. 4,096
81.91.112.0/20 AS29060 ALKIM BASIN YAYIN ILETISIM LTD. STI. 4,096
81.91.80.0/20 AS39790 Web4U s.r.o. 4,096
81.91.208.0/20 AS39817 OvaNet, a.s. 4,096
81.91.160.0/20 AS8763 DENIC eG 4,096
81.91.96.0/21 AS60981 Associated Networks (UK) Limited 2,048
81.91.24.0/21 AS30873 Public Telecommunication Corporation 2,048
81.91.152.0/21 AS206065 Tose'h Fanavari Ertebabat Pasargad Arian Co. PJS 2,048
81.91.104.0/21 AS13101 Amtswerke Eggebek Verwaltungs GmbH trading as Amtswerke Eggebek GmbH & Co.KG. 2,048
81.91.16.0/21 AS199163 DATAGROUP Operations GmbH 2,048
81.91.248.0/22 AS29668 vXtream Ltd 1,024
81.91.242.0/24 AS29668 vXtream Ltd 256
81.91.244.0/24 AS29668 vXtream LTD 256
81.91.252.0/24 AS29668 vXtream - Switzerland /24 - # 2 256
81.91.253.0/24 AS29668 vXtream - Switzerland /24 - # 1 256
81.91.41.0/24 AS8359 MTS Ural branch, fixed Broadband access 256
81.91.189.0/24 AS44705 Obyedinennye Nakhabinskie seti LLC 256
81.91.180.0/24 AS48503 Tele2 Kazakhstan 256
81.91.181.0/24 AS48503 Tele2 Kazakhstan 256
81.91.182.0/24 AS48503 Tele2 Kazakhstan 256
81.91.183.0/24 AS48503 Tele2 Kazakhstan 256
81.91.184.0/24 AS48503 Tele2 Kazakhstan 256
81.91.185.0/24 AS48503 Tele2 Kazakhstan 256
81.91.190.0/24 AS202090 Aktivnie Tehnologii LLC 256
81.91.191.0/24 AS202090 Aktivnie Tehnologii LLC 256
81.91.186.0/24 AS48503 Tele2 Kazakhstan 256
81.91.187.0/24 AS48503 Tele2 Kazakhstan 256
81.91.225.0/24 AS28683 SOCIETE BENINOISE D'INFRASTRUCTURES NUMERIQUES 256
81.91.224.0/24 AS28683 SOCIETE BENINOISE D'INFRASTRUCTURES NUMERIQUES 256
81.91.228.0/24 AS28683 SOCIETE BENINOISE D'INFRASTRUCTURES NUMERIQUES 256
81.91.234.0/24 AS28683 SOCIETE BENINOISE D'INFRASTRUCTURES NUMERIQUES 256
81.91.235.0/24 AS28683 SOCIETE BENINOISE D'INFRASTRUCTURES NUMERIQUES 256
81.91.236.0/24 AS28683 SOCIETE BENINOISE D'INFRASTRUCTURES NUMERIQUES 256
81.91.188.0/24 AS48503 Tele2 Kazakhstan 256

Hosted domains

There are 2,865 domain names hosted across 210 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
81.91.92.221 minijeraby.cz 330
81.91.92.70 velolipno.eu 176
81.91.91.14 anavy.cz 97
81.91.91.54 altx.cz 95
81.91.91.22 mikov.com 92
81.91.91.138 keyokna.cz 79
81.91.91.39 drbna.cz 76
81.91.91.91 veleslavinovarezidence.cz 68
81.91.92.215 tersl.info 59
81.91.92.157 jalousierechner.at 58
81.91.92.203 zonazabavy.cz 52
81.91.92.148 aeronauticamilitare.cz 51
81.91.92.32 hyha.cz 46
81.91.92.52 lahome.cz 42
81.91.92.98 ifp.cz 41
81.91.91.121 uzitkove-vozy.cz 40
81.91.93.19 cleantaxx.cz 39
81.91.92.83 good-art.eu 39
81.91.92.82 linchpin.cz 37
81.91.93.62 plexizahubicku.cz 34

Hosted domains API

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Pingable IPs

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

IP Address ASN Details
81.91.93.32 AS39790 Web4U s.r.o. 0.48ms from Prague, CZ
81.91.91.27 AS39790 Web4U s.r.o. 0.42ms from Prague, CZ
81.91.95.115 AS39790 Web4U s.r.o. 0.51ms from Prague, CZ
81.91.89.43 AS39790 Web4U s.r.o. 0.67ms from Prague, CZ
81.91.92.222 AS39790 Web4U s.r.o. 0.40ms 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
51.183.37.245 AS5607 Sky UK Limited 1.01ms from Dublin, IE
171.229.35.181 AS7552 Viettel Group 6.00ms from Hanoi, VN
176.166.241.133 AS5410 Bouygues Telecom SA 3.00ms from Marseille, FR
60.141.28.117 AS17676 SoftBank Corp. 4.27ms from Osaka, JP
222.2.69.133 AS2516 KDDI CORPORATION 13.62ms from Osaka, JP
176.150.235.245 AS5410 Bouygues Telecom SA 1.45ms from Paris, FR
48.221.121.21 AS8075 Microsoft Corporation 0.76ms from Quincy, US
50.17.140.69 AS14618 Amazon.com, Inc. 0.22ms from Reston, US
115.141.118.197 AS17858 LG POWERCOMM 2.00ms from Seoul, KR
175.233.31.197 AS4766 Korea Telecom 1.92ms from Seoul, KR
125.153.163.85 AS4766 Korea Telecom 5.90ms from Seoul, KR
186.239.216.245 AS10429 TELEFÔNICA BRASIL S.A 0.74ms from São Paulo, BR
78.132.28.53 AS8412 T-Mobile Austria GmbH 8.92ms from Vienna, AT
83.179.3.181 AS1257 Tele2 Sverige AB 14.85ms from Vilnius, LT
122.188.155.21 AS4837 CHINA UNICOM China169 Backbone 5.34ms from Wuhan, CN
77.57.115.197 AS6730 Sunrise GmbH 4.79ms from Zuerich, CH
34.190.248.149 AS15169 Google LLC 0.12ms from Council Bluffs, US
20.37.162.197 AS8075 Microsoft Corporation 0.14ms from Des Moines, US
78.100.56.37 AS8781 Ooredoo Q.S.C. 0.21ms from Doha, QA
52.49.251.69 AS16509 Amazon.com, Inc. 0.29ms from Dublin, IE
34.244.18.85 AS16509 Amazon.com, Inc. 0.16ms from Dublin, IE
23.40.208.165 AS16625 Akamai Technologies, Inc. 0.13ms from Dublin, IE
116.63.175.197 AS58519 Cloud Computing Corporation 0.69ms from Guiyang, CN
61.191.208.21 AS4134 CHINANET-BACKBONE 4.26ms from Huai'an, CN
102.32.107.245 AS327782 Metrofibre Networx 2.62ms from Johannesburg, ZA

Traceroute

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

$
traceroute -a -n -q1 -f4 81.91.91.129
traceroute to 81.91.91.129 (81.91.91.129): 64 hops max, 52 byte packets
4 [] 91.210.16.49 0.552 ms
5 *
6 [] 185.138.110.51 0.617 ms
7 [AS39790] 81.91.95.10 2.815 ms
8 [AS39790] 81.91.95.14 6.054 ms
9 [AS39790] 81.91.91.129 0.597 ms
Measurement taken from IPinfo ProbeNet in Prague, CZ
On

What are IP address ranges?

IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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