Autonomous System details

AS24971

MasterDC s.r.o.  ·  master.cz

Czechia

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AS24971 – MasterDC s.r.o.

Field Value
Country Czechia
Website master.cz
Hosted domains 119,424
IPv4 addresses 58,880
IPv6 addresses 1,665,032,979,616,295,314,167,600,000,000
ASN type Hosting
Registry ripe
Allocated 24 years ago on Jun 11, 2002
Updated 4 days ago on Apr 15, 2026

IP Ranges

Netblock Company Num of IPs
77.93.192.0/19 MasterDC s.r.o. 8,192
83.167.224.0/19 MasterDC s.r.o. 8,192
89.185.224.0/19 MasterDC s.r.o. 8,192
80.79.16.0/20 MasterDC s.r.o. 4,096
81.31.32.0/20 MasterDC s.r.o. 4,096
178.238.32.0/20 MasterDC s.r.o. 4,096
85.118.128.0/21 MasterDC s.r.o. 2,048
149.62.144.0/21 MasterDC s.r.o. 2,048
5.180.200.0/22 Bydzovsky s.r.o. 1,024
37.205.8.0/22 vpsFree.cz, z.s. 1,024
37.205.12.0/22 vpsFree.cz, z.s. 1,024
91.214.192.0/22 QCM, s.r.o. 1,024
91.226.216.0/22 W HOSTING, s.r.o. 1,024
185.25.184.0/22 NETIO Solutions s.r.o. 1,024
185.32.160.0/22 ANAFRA a.s. 1,024
185.58.40.0/22 MasterDC s.r.o. 1,024
185.85.164.0/22 ServerNow s.r.o. 1,024
185.145.160.0/22 Etnetera Core a.s. 1,024
185.239.216.0/22 AdminIT, s. r. o. 1,024
194.145.180.0/22 ServerNow s.r.o. 1,024
195.140.252.0/22 Virtualmaster, s.r.o. 1,024
176.227.168.0/23 HostingSolutions s.r.o. 512
185.8.164.0/23 vpsFree.cz - Prague3 512
185.8.166.0/23 vpsFree.cz - Brno3 512
188.213.234.0/23 NETIO Solutions s.r.o. 512
188.215.18.0/23 NETIO Solutions s.r.o. 512
193.169.160.0/23 Imarto Inc. 512
37.140.220.0/24 ProfiSMS s.r.o. 256
83.223.52.0/24 Yoursafe Holding B.V. 256
91.213.160.0/24 Internet Info, s.r.o. 256
91.216.179.0/24 oXyShop s.r.o. 256
92.63.56.0/24 NEW TELEKOM, spol. s r.o. 256
130.193.16.0/24 BNV Technologies, s.r.o. 256

Netblock Company
2a07:4880::/29 Etnetera Core a.s.
2a0c:6380::/29 AdminIT, s. r. o.
2a00:8220::/32 NETIO Solutions s.r.o.
2a00:a5a0::/32 ANAFRA a.s.
2a01:430::/32 MasterDC s.r.o.
2a03:7460::/32 ServerNow s.r.o.
2a0b:3240::/32 Bydzovsky s.r.o.
2a03:3b40:200::/39 vpsFree.cz, z.s.
2a03:3b40::/40 vpsFree.cz - IPv6 - Prague 2
2a03:3b40:100::/40 vpsFree.cz - IPv6 - Brno 2
2001:678:a50::/48 Imarto Inc.
2001:67c:68::/48 Internet Info, s.r.o.
2a04:16c0:200::/48 Yoursafe Holding B.V.

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WHOIS Details

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                                                ASHandle:       AS24971
                                                OrgID:          AS24971
                                                ASName:         AS24971
                                                ASNumber:       AS24971
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA
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Hosted Domains

There are 119,424 domain names hosted across 5,809 IP addresses on this ASN.

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IP Address Domain Domains on this IP
83.167.244.201 ██████████ 11,503
81.31.37.22 ██████████ 9,451
83.167.244.202 ██████████ 9,160
83.167.249.7 ██████████ 2,116
81.31.35.130 ██████████ 2,102
80.79.30.99 ██████████ 1,963
77.93.211.215 ████████ 1,766
89.185.235.28 ██████████ 1,694
77.93.211.212 ██████████ 1,441
5.180.200.5 █████████ 1,327

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Peers

There are 51 peers for this ASN.

Peers Name
AS1299 Arelion Sweden AB
AS13194 Bite IP Network
AS14840 BR.Digital Telecom
AS1764 Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH
AS197451 Brno University of Technology
AS198150 SIACOM JSC
AS202857 INIZIO Internet Media s.r.o.
AS204957 GREEN FLOID LLC
AS207167 mapnet IT services s.r.o.
AS21045 K-net Technical International Group, s.r.o.
AS211085 mapnet IT services s.r.o.
AS212483 LEVEL EIGHTY-SIX COMMUNICATIONS LTD
AS21320 GEANT Vereniging
AS22356 Durand do Brasil Ltda
AS24482 SG.GS
AS24940 Hetzner Online GmbH
AS263444 Open X Tecnologia Ltda
AS264409 GRUPO YAX
AS28917 Fiord Networks, UAB
AS29049 Delta Telecom Ltd
AS29504 Freenet Liberec, z.s.
AS3212 Telemach Slovenija d.o.o.
AS32590 Valve Corporation
AS33891 Core-Backbone GmbH
AS35369 LINZ STROM GAS WAERME GmbH fuer Energiedienstleistungen und Telekommunikation
AS36236 NetActuate, Inc
AS37721 Virtual Technologies & Solutions
AS39120 Convergenze S.p.A.
AS40994 Hohl IT e.U.
AS41327 Fiber Telecom S.p.A.
AS43733 Viva Armenia CJSC
AS4455 IX Reach Ltd
AS47232 ISP Alliance a.s.
AS48921 Yoursafe Holding B.V.
AS49544 i3D.net B.V
AS50629 LWLcom GmbH
AS51134 Development 777 s.r.o.
AS51184 Fonira Telekom GmbH
AS53062 ALT | GRUPO BRASIL TECPAR
AS5405 Inter.link GmbH
AS57304 JSC RetnNet
AS57463 NetIX Communications JSC
AS59890 Kabel-TV Lampert GmbH & Co KG
AS6204 INTERKVM HOST SRL
AS64481 Joint Venture Dragon Capital LLC
AS6663 Euroweb Romania S.R.L.
AS6881 NIX.CZ z.s.p.o.
AS6939 Hurricane Electric LLC
AS8218 Zayo Infrastructure France SA
AS8529 Zain Omantel International FZ-LLC
AS9002 RETN Limited
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ASN API & Database

Upstreams

There are 3 upstreams for this ASN.

upstreams Name
AS1299 Arelion Sweden AB
AS6939 Hurricane Electric LLC
AS9002 RETN Limited
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ASN API & Database

Downstreams

There are 8 downstreams for this ASN.

Downstreams Name
AS202857 INIZIO Internet Media s.r.o.
AS204957 GREEN FLOID LLC
AS207167 mapnet IT services s.r.o.
AS21045 K-net Technical International Group, s.r.o.
AS211085 mapnet IT services s.r.o.
AS48921 Yoursafe Holding B.V.
AS51134 Development 777 s.r.o.
AS64481 Joint Venture Dragon Capital LLC
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ASN API & Database

Pingable IPs

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

IP Address ASN Details
77.93.202.27 AS24971 MasterDC s.r.o. 0.23ms from Brno, CZ
130.193.16.19 AS24971 MasterDC s.r.o. 0.14ms from Brno, CZ
2a01:430:24a:0:beef:ffff:ffff:ffff AS24971 MasterDC s.r.o. 0.45ms from Prague, CZ
185.145.161.213 AS24971 MasterDC s.r.o. 0.46ms from Prague, CZ
2a01:430:279:0:beef:ffff:ffff:ffff AS24971 MasterDC s.r.o. 0.34ms from Prague, CZ
178.238.42.196 AS24971 MasterDC s.r.o. 0.22ms from Prague, CZ
2a01:430:307::1 AS24971 MasterDC s.r.o. 0.48ms from Prague, CZ
5.180.202.1 AS24971 MasterDC s.r.o. 0.24ms from Prague, CZ
2a01:430:52:1::1 AS24971 MasterDC s.r.o. 0.38ms from Prague, CZ
89.185.254.36 AS24971 MasterDC s.r.o. 0.21ms from Prague, CZ
2a01:430:280::2 AS24971 MasterDC s.r.o. 0.31ms from Prague, CZ
2a01:430:62:0:beef:ffff:ffff:ffff AS24971 MasterDC s.r.o. 2.91ms from Bratislava, SK
2a01:430:17c::1 AS24971 MasterDC s.r.o. 2.93ms from Bratislava, SK
2a01:430:115:0:beef:ffff:ffff:fffe AS24971 MasterDC s.r.o. 2.96ms from Bratislava, SK
2a01:430:12a:0:beef:ffff:ffff:ffff AS24971 MasterDC s.r.o. 2.95ms from Bratislava, SK
77.93.222.64 AS24971 MasterDC s.r.o. 0.16ms from Brno, CZ
185.8.166.52 AS24971 MasterDC s.r.o. 0.23ms from Brno, CZ
81.31.42.245 AS24971 MasterDC s.r.o. 0.19ms from Brno, CZ
2a01:430:269:0:beef:ffff:ffff:ffff AS24971 MasterDC s.r.o. 0.40ms from Prague, CZ
37.205.9.35 AS24971 MasterDC s.r.o. 0.26ms from Prague, CZ
2a01:430:27b::36 AS24971 MasterDC s.r.o. 0.24ms from Prague, CZ
2a01:430:221:0:beef:ffff:ffff:ffff AS24971 MasterDC s.r.o. 0.41ms from Prague, CZ
2a01:430:205:0:beef:ffff:ffff:ffff AS24971 MasterDC s.r.o. 0.41ms from Prague, CZ
2a01:430:264:1::1 AS24971 MasterDC s.r.o. 0.28ms from Prague, CZ
185.25.185.105 AS24971 MasterDC s.r.o. 0.30ms 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
130.35.90.91 AS31898 Oracle Corporation 0.36ms from Ashburn, US
35.164.251.251 AS16509 Amazon.com, Inc. 0.13ms from Boardman, US
54.184.182.91 AS16509 Amazon.com, Inc. 0.14ms from Boardman, US
50.66.190.155 AS6327 Shaw Communications 4.39ms from Calgary, CA
74.139.240.43 AS10796 Charter Communications Inc 16.10ms from Columbus, US
79.223.79.155 AS3320 Deutsche Telekom AG 6.61ms from Frankfurt am Main, DE
117.80.225.219 AS4134 CHINANET-BACKBONE 5.28ms from Nanjing, CN
24.185.107.235 AS6128 Cablevision Systems Corp. 7.85ms from New York City, US
177.196.88.155 AS26599 TELEFÔNICA BRASIL S.A 3.44ms from Osasco, BR
120.214.56.11 AS24445 Henan Mobile Communications Co.,Ltd 18.38ms from Qingdao, CN
173.31.253.219 AS30036 Mediacom Communications Corp 10.69ms from Atlanta, US
101.98.248.139 AS9790 Two Degrees Networks Limited 1.29ms from Auckland, NZ
13.245.97.11 AS16509 Amazon.com, Inc. 0.11ms from Cape Town, ZA
187.65.217.187 AS28573 Claro NXT Telecomunicacoes Ltda 12.49ms from Curitiba, BR
34.245.91.11 AS16509 Amazon.com, Inc. 0.40ms from Dublin, IE
206.42.62.91 AS28126 BRISANET SERVICOS DE TELECOMUNICACOES S.A 5.03ms from Fortaleza, BR
84.175.195.107 AS3320 Deutsche Telekom AG 5.41ms from Frankfurt am Main, DE
156.34.82.59 AS855 Bell Canada 6.90ms from Fredericton, CA
212.88.109.107 AS20294 MTN Uganda 0.51ms from Kampala, UG
172.88.221.75 AS20001 Charter Communications Inc 6.59ms from Los Angeles, US
87.26.51.187 AS3269 Telecom Italia S.p.A. 6.75ms from Milan, IT
104.159.212.11 AS20115 Charter Communications LLC 14.92ms from Minneapolis, US
129.85.170.27 AS98 The Rockefeller University 0.71ms from New York City, US
52.202.122.235 AS14618 Amazon.com, Inc. 0.20ms from Reston, US
113.234.55.59 AS4837 CHINA UNICOM China169 Backbone 10.29ms from Tieling, CN

Traceroute

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

$
traceroute -a -n -q1 -f3 89.185.255.235
traceroute to 89.185.255.235 (89.185.255.235): 64 hops max, 52 byte packets
Measurement taken from IPinfo ProbeNet in Brno, 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 AS24971 at robtex.

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