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 117,722
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 months ago on Oct 26, 2025

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 117,722 domain names hosted across 5,756 IP addresses on this ASN.

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IP Address Domain Domains on this IP
83.167.244.201 ██████████ 12,259
81.31.37.22 ██████████ 12,231
83.167.244.202 ██████████ 9,610
185.25.185.106 █████████ 4,245
83.167.249.7 ██████████ 2,636
77.93.211.215 ████████ 2,443
80.79.30.99 ██████████ 2,242
81.31.35.130 ██████████ 2,059
89.185.235.28 ██████████ 1,861
77.93.211.212 ██████████ 1,650

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Peers

There are 47 peers for this ASN.

Peers Name
AS1299 Arelion Sweden AB
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
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
AS44901 Belcloud LTD
AS47232 ISP Alliance a.s.
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
AS6424 EDGOO NETWORKS
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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Downstreams

There are 6 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.
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
2a01:430:281:100::f AS24971 MasterDC s.r.o. 2.92ms from Bratislava, SK
2a01:430:69::2 AS24971 MasterDC s.r.o. 2.89ms from Bratislava, SK
2a01:430:149::2 AS24971 MasterDC s.r.o. 2.90ms from Bratislava, SK
83.167.253.94 AS24971 MasterDC s.r.o. 0.18ms from Brno, CZ
89.185.255.249 AS24971 MasterDC s.r.o. 0.12ms from Brno, CZ
91.214.193.254 AS24971 MasterDC s.r.o. 0.22ms from Brno, CZ
2a01:430:222::1 AS24971 MasterDC s.r.o. 0.36ms from Prague, CZ
178.238.45.12 AS24971 MasterDC s.r.o. 0.24ms from Prague, CZ
178.238.43.75 AS24971 MasterDC s.r.o. 0.22ms from Prague, CZ
185.8.164.26 AS24971 MasterDC s.r.o. 0.28ms from Prague, CZ
2a01:430:248::2 AS24971 MasterDC s.r.o. 0.28ms from Prague, CZ
185.239.217.1 AS24971 MasterDC s.r.o. 0.37ms from Prague, CZ
2a01:430:70:1::21 AS24971 MasterDC s.r.o. 2.88ms from Bratislava, SK
2a01:430:12e::1 AS24971 MasterDC s.r.o. 2.96ms from Bratislava, SK
2a01:430:1a::216 AS24971 MasterDC s.r.o. 3.27ms from Bratislava, SK
2a01:430:16:1c00::9 AS24971 MasterDC s.r.o. 2.93ms from Bratislava, SK
81.31.33.141 AS24971 MasterDC s.r.o. 0.18ms from Brno, CZ
2a01:430:243:0:beef:ffff:ffff:ffff AS24971 MasterDC s.r.o. 0.39ms from Prague, CZ
2a01:430:27f::1 AS24971 MasterDC s.r.o. 0.41ms from Prague, CZ
2a01:430:18c:0:beef:ffff:ffff:ffff AS24971 MasterDC s.r.o. 3.11ms from Prague, CZ
2a01:430:268:0:beef:ffff:ffff:ffff AS24971 MasterDC s.r.o. 0.38ms from Prague, CZ
176.227.168.1 AS24971 MasterDC s.r.o. 0.28ms from Prague, CZ
83.167.252.136 AS24971 MasterDC s.r.o. 0.21ms from Prague, CZ
2a01:430:31:0:beef:ffff:ffff:ffff AS24971 MasterDC s.r.o. 2.95ms from Bratislava, SK
2a01:430:137:1::2 AS24971 MasterDC s.r.o. 2.87ms from Bratislava, SK

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
154.252.33.187 AS36947 Telecom Algeria 12.45ms from Algiers, DZ
23.254.245.139 AS54290 Hostwinds LLC. 0.22ms from Dallas, US
177.75.88.11 AS262544 RazaoInfo Internet Ltda 8.43ms from Novo Hamburgo, BR
125.195.52.139 AS2518 BIGLOBE Inc. 10.94ms from Osaka, JP
177.74.187.203 AS52783 ALCANS TELECOM LTDA 5.20ms from Sao Paulo, BR
20.193.8.155 AS8075 Microsoft Corporation 0.67ms from Sydney, AU
23.100.99.59 AS8075 Microsoft Corporation 0.19ms from Tokyo, JP
99.253.195.59 AS812 Rogers Communications Canada Inc. 4.91ms from Toronto, CA
104.13.88.11 AS7018 AT&T Enterprises, LLC 1.25ms from Atlanta, US
89.238.254.155 AS6663 Euroweb Romania S.R.L. 0.89ms from Bucharest, RO
142.202.164.43 AS398203 MidSouth Fiber 0.17ms from Dallas, US
217.231.1.27 AS3320 Deutsche Telekom AG 7.56ms from Frankfurt am Main, DE
222.114.46.139 AS4766 Korea Telecom 3.12ms from Incheon, KR
119.162.154.11 AS4837 CHINA UNICOM China169 Backbone 3.06ms from Jinan, CN
92.238.209.27 AS5089 Virgin Media Limited 9.69ms from London, GB
213.31.141.251 AS6871 Plusnet 5.47ms from London, GB
81.38.39.123 AS3352 TELEFONICA DE ESPANA S.A.U. 9.24ms from Madrid, ES
79.25.103.139 AS3269 Telecom Italia S.p.A. 2.57ms from Milan, IT
221.226.35.139 AS4134 CHINANET-BACKBONE 1.05ms from Nanjing, CN
217.108.43.203 AS3215 Orange S.A. 3.05ms from Paris, FR
183.113.229.251 AS4766 Korea Telecom 1.79ms from Seoul, KR
20.249.125.187 AS8075 Microsoft Corporation 0.29ms from Seoul, KR
139.59.98.235 AS14061 DigitalOcean, LLC 0.23ms from Singapore, SG
61.242.176.27 AS4837 CHINA UNICOM China169 Backbone 2.23ms from Wuhan, CN
24.91.187.139 AS7922 Comcast Cable Communications, LLC 5.21ms from Boston, US

Traceroute

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

$
traceroute -a -n -q1 -m5 178.238.39.175
traceroute to 178.238.39.175 (178.238.39.175): 5 hops max, 52 byte packets
2 [AS15169] 192.178.99.18 18.717 ms
3 *
4 *
5 *
Measurement taken from IPinfo ProbeNet in Berlin, DE
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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