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 117,682
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 2 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 117,682 domain names hosted across 5,761 IP addresses on this ASN.

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IP Address Domain Domains on this IP
83.167.244.201 ██████████ 12,212
81.31.37.22 ██████████ 12,187
83.167.244.202 ██████████ 9,587
185.25.185.106 ██████████ 4,218
83.167.249.7 ██████████ 2,620
77.93.211.215 ████████ 2,455
80.79.30.99 ██████████ 2,250
81.31.35.130 ██████████ 2,142
89.185.235.28 ██████████ 1,855
77.93.211.212 ██████████ 1,679

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Peers

There are 49 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
AS22356 Durand do Brasil Ltda
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.
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
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 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
2a01:430:13f::1 AS24971 MasterDC s.r.o. 2.96ms from Bratislava, SK
2a01:430:184::1 AS24971 MasterDC s.r.o. 3.00ms from Bratislava, SK
2a01:430:16b::42:1 AS24971 MasterDC s.r.o. 2.90ms from Bratislava, SK
2a01:430:215:1::1:1 AS24971 MasterDC s.r.o. 3.00ms from Bratislava, SK
2a01:430:187:0:beef:ffff:ffff:fffe AS24971 MasterDC s.r.o. 2.96ms from Bratislava, SK
81.31.39.186 AS24971 MasterDC s.r.o. 0.15ms from Brno, CZ
77.93.205.1 AS24971 MasterDC s.r.o. 0.32ms from Brno, CZ
185.58.40.71 AS24971 MasterDC s.r.o. 0.14ms from Brno, CZ
77.93.206.89 AS24971 MasterDC s.r.o. 0.13ms from Brno, CZ
185.32.160.120 AS24971 MasterDC s.r.o. 0.23ms from Brno, CZ
77.93.203.172 AS24971 MasterDC s.r.o. 0.14ms from Brno, CZ
178.238.41.49 AS24971 MasterDC s.r.o. 0.24ms from Brno, CZ
2a01:430:28a::2 AS24971 MasterDC s.r.o. 0.28ms from Prague, CZ
185.8.165.241 AS24971 MasterDC s.r.o. 0.25ms from Prague, CZ
2a01:430:277::10 AS24971 MasterDC s.r.o. 0.30ms from Prague, CZ
2a01:430:42:0:beef:ffff:ffff:ffff AS24971 MasterDC s.r.o. 0.35ms from Prague, CZ
2a03:3b40:209::1 AS24971 MasterDC s.r.o. 6.26ms from Prague, CZ
193.169.161.1 AS24971 MasterDC s.r.o. 0.24ms from Prague, CZ
83.167.240.132 AS24971 MasterDC s.r.o. 0.24ms from Prague, CZ
2a01:430:282:0:beef:ffff:ffff:ffff AS24971 MasterDC s.r.o. 0.38ms from Prague, CZ
2a01:430:100:3c::3 AS24971 MasterDC s.r.o. 0.28ms from Prague, CZ
2a0c:6380:1:104::1 AS24971 MasterDC s.r.o. 0.40ms from Prague, CZ
2a03:3b40:2d6::2 AS24971 MasterDC s.r.o. 27.90ms from Vienna, AT
2a01:430:16e:0:beef:ffff:ffff:fffe AS24971 MasterDC s.r.o. 2.96ms from Bratislava, SK
2a03:3b40:101:55::1 AS24971 MasterDC s.r.o. 2.94ms 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
13.73.144.171 AS8075 Microsoft Corporation 0.26ms from Amsterdam, NL
44.222.33.27 AS14618 Amazon.com, Inc. 0.55ms from Ashburn, US
75.67.128.91 AS7922 Comcast Cable Communications, LLC 10.63ms from Boston, US
174.134.146.187 AS33363 Charter Communications, Inc 9.69ms from Los Angeles, US
94.34.189.59 AS8612 Tiscali Italia S.P.A. 7.75ms from Milan, IT
209.98.55.219 AS8015 US Signal Company, L.L.C. 0.67ms from Minneapolis, US
80.138.53.155 AS3320 Deutsche Telekom AG 3.70ms from Nuernberg, DE
91.172.62.251 AS12322 Free SAS 4.15ms from Paris, FR
211.179.161.235 AS9318 SK Broadband Co Ltd 6.03ms from Seoul, KR
79.185.81.11 AS5617 Orange Polska Spolka Akcyjna 17.89ms from Warsaw, PL
201.209.29.107 AS8048 CANTV Servicios, Venezuela 14.38ms from Willemstad, CW
77.164.200.235 AS1136 KPN B.V. 2.54ms from Amsterdam, NL
81.157.5.43 AS2856 British Telecommunications PLC 2.05ms from London, GB
89.105.122.235 AS39545 Fluidone Ltd. 0.55ms from London, GB
51.7.71.27 AS6871 Plusnet 7.14ms from London, GB
80.189.122.155 AS6871 Plusnet 6.59ms from London, GB
90.253.253.155 AS5378 Vodafone Limited 2.47ms from Manchester, GB
68.197.209.187 AS6128 Cablevision Systems Corp. 3.37ms from New York City, US
111.125.164.11 AS45577 Intervolve Pty Ltd 0.19ms from Sydney, AU
61.194.159.107 AS2514 NTT PC Communications, Inc. 6.51ms from Tokyo, JP
209.221.13.43 AS17054 Expedient 7.40ms from Toronto, CA
140.186.254.11 AS11232 Midcontinent Communications 6.54ms from Minneapolis, US
49.66.179.187 AS4134 CHINANET-BACKBONE 4.69ms from Nanjing, CN
153.185.143.155 AS4713 NTT DOCOMO BUSINESS,Inc. 5.15ms from Osaka, JP
20.168.41.107 AS8075 Microsoft Corporation 0.19ms from Phoenix, US

Traceroute

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

$
traceroute -a -n -q1 -f2 -m7 185.239.218.4
traceroute to 185.239.218.4 (185.239.218.4): 7 hops max, 52 byte packets
2 [AS9002] 87.245.232.163 68.461 ms
3 [AS9002] 87.245.246.87 67.522 ms
5 *
6 *
7 *
Measurement taken from IPinfo ProbeNet in Omsk, RU
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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