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 117,772
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 117,772 domain names hosted across 5,768 IP addresses on this ASN.

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IP Address Domain Domains on this IP
83.167.244.201 ██████████ 12,263
81.31.37.22 ██████████ 12,239
83.167.244.202 ██████████ 9,612
185.25.185.106 ██████████ 4,247
83.167.249.7 ██████████ 2,642
77.93.211.215 ████████ 2,430
80.79.30.99 ██████████ 2,240
81.31.35.130 ██████████ 2,059
89.185.235.28 ██████████ 1,864
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

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

IP Address ASN Details
83.167.253.94 AS24971 MasterDC s.r.o. 0.18ms from Brno, CZ
178.238.41.17 AS24971 MasterDC s.r.o. 0.26ms from Brno, CZ
80.79.22.37 AS24971 MasterDC s.r.o. 0.16ms from Brno, CZ
185.85.164.67 AS24971 MasterDC s.r.o. 0.13ms from Brno, CZ
77.93.218.199 AS24971 MasterDC s.r.o. 0.17ms from Brno, CZ
185.8.166.38 AS24971 MasterDC s.r.o. 0.25ms from Brno, CZ
89.185.234.70 AS24971 MasterDC s.r.o. 0.21ms from Prague, CZ
188.215.19.254 AS24971 MasterDC s.r.o. 0.46ms from Prague, CZ
91.226.218.121 AS24971 MasterDC s.r.o. 0.25ms from Prague, CZ
83.167.247.67 AS24971 MasterDC s.r.o. 0.21ms from Prague, CZ
2a03:3b40:20d::1 AS24971 MasterDC s.r.o. 7.02ms from Prague, CZ
2a01:430:5e:1:beef:ffff:ffff:ffff AS24971 MasterDC s.r.o. 0.33ms from Prague, CZ
80.79.17.128 AS24971 MasterDC s.r.o. 0.26ms from Prague, CZ
2a01:430:176:0:beef:ffff:ffff:fffe AS24971 MasterDC s.r.o. 3.02ms from Prague, CZ
2a01:430:209:0:beef:ffff:ffff:ffff AS24971 MasterDC s.r.o. 0.33ms from Prague, CZ
2a01:430:274::84 AS24971 MasterDC s.r.o. 0.26ms from Prague, CZ
2a01:430:269:0:beef:ffff:ffff:fffe AS24971 MasterDC s.r.o. 0.39ms from Prague, CZ
2a01:430:239::5 AS24971 MasterDC s.r.o. 0.33ms from Prague, CZ
2a01:430:c:0:83:167:240:75 AS24971 MasterDC s.r.o. 0.27ms from Prague, CZ
2a01:430:1:1::1 AS24971 MasterDC s.r.o. 2.88ms from Bratislava, SK
2a01:430:16a::1 AS24971 MasterDC s.r.o. 2.95ms from Bratislava, SK
2a01:430:33::6 AS24971 MasterDC s.r.o. 2.91ms from Bratislava, SK
83.167.255.183 AS24971 MasterDC s.r.o. 0.18ms from Brno, CZ
149.62.148.154 AS24971 MasterDC s.r.o. 0.18ms from Brno, CZ
2a01:430:22d:1::2 AS24971 MasterDC s.r.o. 0.27ms 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
49.231.166.75 AS45458 SBN-ISP/AWN-ISP and SBN-NIX/AWN-NIX 2.58ms from Bangkok, TH
89.238.254.155 AS6663 Euroweb Romania S.R.L. 0.89ms from Bucharest, RO
52.115.90.59 AS8075 Microsoft Corporation 1.16ms from Des Moines, US
209.98.55.219 AS8015 US Signal Company, L.L.C. 0.67ms from Minneapolis, US
125.113.146.27 AS4134 CHINANET-BACKBONE 7.03ms from Ningbo, CN
37.97.81.251 AS8399 SEWAN SAS 0.55ms from Paris, FR
46.212.232.11 AS25400 Telia Norge AS 9.28ms from Sandefjord, NO
211.223.226.11 AS10042 SUSEONG COLLEGE 4.90ms from Seoul, KR
62.21.5.43 AS13110 INEA sp. z o.o. 8.50ms from Warsaw, PL
73.45.230.203 AS7922 Comcast Cable Communications, LLC 8.77ms from Chicago, US
34.242.155.235 AS16509 Amazon.com, Inc. 0.21ms from Dublin, IE
79.205.117.75 AS3320 Deutsche Telekom AG 8.08ms from Frankfurt am Main, DE
80.221.172.203 AS1759 Telia Finland Oyj 8.11ms from Helsinki, FI
81.135.51.59 AS2856 British Telecommunications PLC 4.05ms from London, GB
83.39.39.155 AS3352 TELEFONICA DE ESPANA S.A.U. 1.65ms from Madrid, ES
50.150.131.235 AS7922 Comcast Cable Communications, LLC 0.96ms from Miami, US
108.27.219.107 AS701 Verizon Business 2.28ms from New York City, US
177.75.88.11 AS262544 RazaoInfo Internet Ltda 8.43ms from Novo Hamburgo, BR
122.0.57.27 AS17583 Keumgang Cable Network 4.89ms from Seoul, KR
139.59.98.235 AS14061 DigitalOcean, LLC 0.23ms from Singapore, SG
18.140.195.123 AS16509 Amazon.com, Inc. 0.15ms from Singapore, SG
119.74.142.251 AS9506 Singtel Fibre Broadband 1.76ms from Singapore, SG
35.76.201.219 AS16509 Amazon.com, Inc. 0.22ms from Tokyo, JP
35.164.251.251 AS16509 Amazon.com, Inc. 0.15ms from Boardman, US
69.14.193.155 AS12083 WideOpenWest Finance LLC 11.28ms from Chicago, US

Traceroute

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

$
traceroute -a -n -q1 -f3 194.145.183.54
traceroute to 194.145.183.54 (194.145.183.54): 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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