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 117,768
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 117,768 domain names hosted across 5,762 IP addresses on this ASN.

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IP Address Domain Domains on this IP
83.167.244.201 ██████████ 12,271
81.31.37.22 ██████████ 12,230
83.167.244.202 ██████████ 9,604
185.25.185.106 ███████ 4,245
83.167.249.7 ██████████ 2,629
77.93.211.215 ████████ 2,450
80.79.30.99 ██████████ 2,248
81.31.35.130 ██████████ 2,060
89.185.235.28 ██████████ 1,861
77.93.211.212 ██████████ 1,649

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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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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

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

IP Address ASN Details
2a01:430:115:0:beef:ffff:ffff:fffe AS24971 MasterDC s.r.o. 3.00ms from Bratislava, SK
2a01:430:70:1::21 AS24971 MasterDC s.r.o. 2.88ms from Bratislava, SK
2a01:430:215:1::1:1 AS24971 MasterDC s.r.o. 2.96ms from Bratislava, SK
2a01:430:188:11::10 AS24971 MasterDC s.r.o. 2.91ms from Bratislava, SK
2a01:430:18b::1 AS24971 MasterDC s.r.o. 3.08ms from Bratislava, SK
2a03:3b40:100::1 AS24971 MasterDC s.r.o. 2.88ms from Bratislava, SK
2a01:430:175::2 AS24971 MasterDC s.r.o. 2.92ms from Bratislava, SK
37.140.220.93 AS24971 MasterDC s.r.o. 0.12ms from Brno, CZ
81.31.47.152 AS24971 MasterDC s.r.o. 0.15ms from Brno, CZ
89.185.250.96 AS24971 MasterDC s.r.o. 0.16ms from Brno, CZ
77.93.205.17 AS24971 MasterDC s.r.o. 0.30ms from Brno, CZ
81.31.34.151 AS24971 MasterDC s.r.o. 0.16ms from Brno, CZ
85.118.134.252 AS24971 MasterDC s.r.o. 0.16ms from Brno, CZ
2a01:430:25b:5::194 AS24971 MasterDC s.r.o. 0.24ms from Prague, CZ
2a01:430:269:0:beef:ffff:ffff:ffff AS24971 MasterDC s.r.o. 0.36ms from Prague, CZ
2a01:430:3b::1 AS24971 MasterDC s.r.o. 0.36ms from Prague, CZ
2a01:430:262::1 AS24971 MasterDC s.r.o. 0.38ms from Prague, CZ
2a01:430:264:1::1 AS24971 MasterDC s.r.o. 0.26ms from Prague, CZ
2a01:430:100:3c::2 AS24971 MasterDC s.r.o. 0.27ms from Prague, CZ
85.118.130.54 AS24971 MasterDC s.r.o. 0.22ms from Prague, CZ
2a01:430:27f:0:beef:ffff:ffff:fffe AS24971 MasterDC s.r.o. 0.37ms from Prague, CZ
2a01:430:18f:0:beef:ffff:ffff:fffe AS24971 MasterDC s.r.o. 3.21ms from Prague, CZ
2a01:430:132::101 AS24971 MasterDC s.r.o. 2.90ms from Bratislava, SK
2a01:430:189:0:beef:ffff:ffff:ffff AS24971 MasterDC s.r.o. 3.15ms from Bratislava, SK
2a01:430:133::1 AS24971 MasterDC s.r.o. 2.99ms 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
82.168.51.155 AS1136 KPN B.V. 3.43ms from Amsterdam, NL
196.130.120.235 AS24835 Vodafone Data 13.34ms from Cairo, EG
94.24.132.11 AS8369 Intersvyaz-2 JSC 0.92ms from Chelyabinsk, RU
129.24.122.11 AS3388 University of New Mexico 11.58ms from Cheyenne, US
52.180.208.11 AS8075 Microsoft Corporation 1.59ms from Des Moines, US
206.42.62.91 AS28126 BRISANET SERVICOS DE TELECOMUNICACOES S.A 4.96ms from Fortaleza, BR
49.81.245.251 AS4134 CHINANET-BACKBONE 9.53ms from Huai'an, CN
62.97.41.91 AS31115 INTRED S.P.A. 2.27ms from Milan, IT
64.19.187.91 AS7078 Monmouth Internet Corp 6.39ms from New York City, US
20.235.37.219 AS8075 Microsoft Corporation 0.27ms from Saint Thomas Mount, IN
109.105.106.11 AS2603 NORDUnet 3.60ms from Skanderborg, DK
113.224.193.91 AS4837 CHINA UNICOM China169 Backbone 3.89ms from Tieling, CN
57.182.219.43 AS16509 Amazon.com, Inc. 0.21ms from Tokyo, JP
46.36.14.155 AS48642 Joint stock company "For" 0.99ms from Yekaterinburg, RU
141.140.87.203 AS6079 RCN 1.84ms from Ashburn, US
95.148.0.123 AS2856 British Telecommunications PLC 12.33ms from London, GB
90.253.253.155 AS5378 Vodafone Limited 2.36ms from Manchester, GB
209.98.55.219 AS8015 US Signal Company, L.L.C. 0.68ms from Minneapolis, US
142.41.247.91 AS852 TELUS Communications Inc. 3.95ms from Montreal, CA
79.36.178.43 AS3269 Telecom Italia S.p.A. 4.23ms from Rome, IT
119.202.226.139 AS4766 Korea Telecom 6.70ms from Seoul, KR
194.141.251.235 AS6802 Bulgarian Research and Education Network Association (BREN) 0.34ms from Sofia, BG
197.11.87.251 AS327934 SOCIETE NATIONALE DES TELECOMMUNICATIONS (Tunisie Telecom) 3.03ms from Tunis, TN
207.193.245.91 AS7018 AT&T Enterprises, LLC 9.93ms from Atlanta, US
181.82.58.75 AS7303 Telecom Argentina S.A. 7.73ms from Buenos Aires, AR

Traceroute

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

$
traceroute -a -n -q1 -f2 89.185.231.216
traceroute to 89.185.231.216 (89.185.231.216): 64 hops max, 52 byte packets
2 [] 194.30.187.85 2.841 ms
3 *
4 *
Measurement taken from IPinfo ProbeNet in Bratislava, SK
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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