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 1,665,032,979,616,295,313,626,846,199,808
ASN type Hosting
Registry ripe
Allocated 24 years ago on Jun 11, 2002
Updated 3 days ago on Mar 21, 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 ██████████ 12,395
81.31.37.22 ██████████ 12,310
83.167.244.202 ██████████ 9,708
185.25.185.106 ██████████ 4,371
83.167.249.7 ██████████ 2,654
77.93.211.215 ████████ 2,416
81.31.35.130 ██████████ 2,253
80.79.30.99 ██████████ 2,239
89.185.235.28 ██████████ 1,879
77.93.211.212 ██████████ 1,612

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Peers

There are 48 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
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
AS24482 SG.GS
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.
AS4455 IX Reach Ltd
AS44901 Belcloud 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 7 downstreams for this ASN.

Downstreams Name
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

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

IP Address ASN Details
2a01:430:115::1 AS24971 MasterDC s.r.o. 2.96ms from Bratislava, SK
2a01:430:14e::1 AS24971 MasterDC s.r.o. 2.95ms from Bratislava, SK
81.31.35.252 AS24971 MasterDC s.r.o. 0.23ms from Brno, CZ
77.93.219.247 AS24971 MasterDC s.r.o. 0.18ms from Brno, CZ
80.79.28.162 AS24971 MasterDC s.r.o. 0.12ms from Brno, CZ
2a01:430:2c::1:2 AS24971 MasterDC s.r.o. 0.24ms from Prague, CZ
178.238.34.1 AS24971 MasterDC s.r.o. 0.32ms from Prague, CZ
2a01:430:17:1::ffff:1536 AS24971 MasterDC s.r.o. 0.29ms from Prague, CZ
2a01:430:275:0:beef:ffff:ffff:ffff AS24971 MasterDC s.r.o. 0.43ms from Prague, CZ
2a03:3b40:25::1 AS24971 MasterDC s.r.o. 0.44ms from Prague, CZ
2a01:430:24f::2 AS24971 MasterDC s.r.o. 0.31ms from Prague, CZ
2a01:430:200:1c::200 AS24971 MasterDC s.r.o. 0.24ms from Prague, CZ
2a01:430:21e::1 AS24971 MasterDC s.r.o. 0.36ms from Prague, CZ
89.185.226.34 AS24971 MasterDC s.r.o. 0.61ms from Prague, CZ
85.118.132.162 AS24971 MasterDC s.r.o. 0.23ms from Prague, CZ
2a01:430:270::f8 AS24971 MasterDC s.r.o. 0.32ms from Prague, CZ
2a01:430:129::1 AS24971 MasterDC s.r.o. 2.98ms from Bratislava, SK
2a01:430:1:1::1 AS24971 MasterDC s.r.o. 2.88ms from Bratislava, SK
2a01:430:126:0:66d1:54ff:fee0:245b AS24971 MasterDC s.r.o. 2.87ms from Bratislava, SK
2a01:430:103:4::2 AS24971 MasterDC s.r.o. 2.90ms from Bratislava, SK
2a01:430:13f:0:beef:ffff:ffff:ffff AS24971 MasterDC s.r.o. 2.95ms from Bratislava, SK
77.93.202.26 AS24971 MasterDC s.r.o. 0.27ms from Brno, CZ
83.167.253.93 AS24971 MasterDC s.r.o. 0.21ms from Brno, CZ
185.8.166.57 AS24971 MasterDC s.r.o. 0.26ms from Brno, CZ
77.93.218.199 AS24971 MasterDC s.r.o. 0.16ms from Brno, 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
34.86.248.43 AS396982 Google LLC 0.13ms from Ashburn, US
132.193.210.251 AS668 United States Department of Defense (DoD) 0.63ms from Atlanta, US
41.141.189.155 AS36903 Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM 2.05ms from Casablanca, MA
188.237.220.11 AS8926 Moldtelecom SA 3.19ms from Chisinau, MD
169.46.198.123 AS36351 IBM Cloud 0.82ms from Dallas, US
84.153.85.59 AS3320 Deutsche Telekom AG 9.53ms from Frankfurt am Main, DE
45.248.145.203 AS201838 Community Fibre Limited 1.81ms from London, GB
38.100.67.11 AS174 Cogent Communications, LLC 0.74ms from Los Angeles, US
90.253.253.155 AS5378 Vodafone Limited 3.07ms from Manchester, GB
50.150.131.235 AS7922 Comcast Cable Communications, LLC 0.94ms from Miami, US
15.206.180.235 AS16509 Amazon.com, Inc. 0.12ms from Mumbai, IN
91.170.223.107 AS12322 Free SAS 2.27ms from Paris, FR
79.43.183.11 AS3269 Telecom Italia S.p.A. 7.70ms from Rome, IT
78.36.245.107 AS12389 PJSC Rostelecom 7.90ms from Saint Petersburg, RU
177.74.187.203 AS52783 ALCANS TELECOM LTDA 5.38ms from Sao Paulo, BR
52.187.17.155 AS8075 Microsoft Corporation 0.47ms from Singapore, SG
221.201.224.155 AS4837 CHINA UNICOM China169 Backbone 7.72ms from Tieling, CN
79.223.79.155 AS3320 Deutsche Telekom AG 6.65ms from Frankfurt am Main, DE
123.96.179.123 AS4134 CHINANET-BACKBONE 9.35ms from Hangzhou, CN
95.120.20.11 AS3352 TELEFONICA DE ESPANA S.A.U. 9.57ms from Madrid, ES
54.94.136.107 AS16509 Amazon.com, Inc. 0.17ms from Osasco, BR
102.25.236.123 AS327934 SOCIETE NATIONALE DES TELECOMMUNICATIONS (Tunisie Telecom) 14.87ms from Tunis, TN
173.31.253.219 AS30036 Mediacom Communications Corp 10.14ms from Atlanta, US
49.231.166.75 AS45458 SBN-ISP/AWN-ISP and SBN-NIX/AWN-NIX 2.57ms from Bangkok, TH
139.209.253.155 AS4837 CHINA UNICOM China169 Backbone 7.75ms from Changchun, 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 -m7 77.93.212.203
traceroute to 77.93.212.203 (77.93.212.203): 7 hops max, 52 byte packets
4 [AS21928] 100.199.0.57 0.079 ms
5 *
6 *
7 *
Measurement taken from IPinfo ProbeNet in Liuzhou, CN
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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