ASN Lookup Tool

MasterDC s.r.o. master.cz CZ CZ 46 Routes

AS Data

AS24971

AS24971MasterDC s.r.o.

AS Number 24971
AS Name MASTER-AS
Organization MasterDC s.r.o.(org-mis2-ripe)
Country CZ
Website master.cz
Number of IPv4 Routes 33
Number of IPv6 Routes 13
ASN type ISP
Allocation Status ASSIGNED
Registry RIPE
Date Allocated 2002-06-11

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Use ASN data for AS24971 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route # IPs
194.145.180.0/22 1024
185.32.160.0/22 1024
149.62.144.0/21 2048
188.213.234.0/23 512
85.118.128.0/21 2048
37.205.12.0/22 1024
2001:678:a50::/48 ~1×10²⁴
81.31.32.0/20 4096
2a00:8220::/32 ~79×10²⁷
2a07:4880::/29 ~634×10²⁷

Raw Whois Response

% This is the RIPE Database query service.
% The objects are in RPSL format.
%
% The RIPE Database is subject to Terms and Conditions.
% See https://docs.db.ripe.net/terms-conditions.html

% Note: this output has been filtered.
%       To receive output for a database update, use the "-B" flag.

% Information related to 'AS24879 - AS24986'

as-block:       AS24879 - AS24986
descr:          RIPE NCC ASN block
remarks:        These AS Numbers are assigned to network operators in the RIPE NCC service region.
mnt-by:         RIPE-NCC-HM-MNT
created:        2018-11-22T15:27:30Z
last-modified:  2018-11-22T15:27:30Z
source:         RIPE

% Information related to 'AS24971'

% Abuse contact for 'AS24971' is 'abuse@master.cz'

aut-num:        AS24971
as-name:        MASTER-AS
org:            ORG-MIs2-RIPE
remarks:        .  .              _  _
remarks:        |\/| _. __|_ _ ._| \/
remarks:        |  |(_|_> |_(/_| |_/\_
remarks:
descr:          Czech Republic / www.master.cz
descr:          e-mail: noc@master.cz
remarks:
remarks:        ========================  Upstream  ========================
remarks:
remarks:        = Arelion FKA Telia
remarks:
import:         from AS1299 action pref=90; accept ANY AND NOT {0.0.0.0/0};
export:         to AS1299  announce  AS24971:AS-MASTERCZ
remarks:
remarks:        = RETN
remarks:
import:         from AS9002 action pref=90; accept ANY AND NOT {0.0.0.0/0};
export:         to AS9002  announce  AS24971:AS-MASTERCZ
remarks:
remarks:        ========================  Downstream ========================
remarks:
remarks:        = Q-Net CZ
import:         from AS21045 action pref=10; accept AS21045
export:         to AS21045 announce ANY
remarks:        = netsafe
import:         from AS48921 action pref=10; accept AS48921 AS-FDR
export:         to AS48921 announce ANY
remarks:        = INTACTO GAMES a.s.
import:         from AS51134 action pref=10; accept AS51134
export:         to  AS51134 announce ANY
remarks:        = DCIT, a.s.
import:         from AS199806  action pref=10; accept AS199806
export:         to  AS199806 announce ANY
remarks:        = amccomp s.r.o.
import:         from AS207167 action pref=10; accept AS207167 AS201922 AS208143 AS215777 AS206321 AS207583 AS207575 AS207576
export:         to AS207167 announce {0.0.0.0/0};
remarks:        = LAYER6
import:         from AS204957 action pref=10; accept AS204957;
export:         to AS204957 announce {0.0.0.0/0};
remarks:        = Dragon-Capital
import:         from AS64481 action pref=10; accept AS64481;
export:         to AS64481 announce {0.0.0.0/0};
remarks:
remarks:        ========================  peering.cz peering ========================
remarks:
import:         from AS24971:AS-MAI-PEERING-CZ-PEER action pref = 50; accept as-peeringcz-rs
export:         to   AS24971:AS-MAI-PEERING-CZ-PEER announce AS24971:AS-MASTERCZ-CZPEERING
remarks:
remarks:        ========================  NIX Prague peering ========================
remarks:
import:         from AS24971:AS-MAI-NIX-PEER action pref = 50; accept AS47200:AS-NIXCZ-RSCLIENTS
export:         to   AS24971:AS-MAI-NIX-PEER announce AS24971:AS-MASTERCZ-CZNIX
remarks:
remarks:        ========================  NIX Bratislava peering ========================
remarks:
import:         from AS24971:AS-MAI-NIX-PEER action pref = 50; accept AS47627:AS-NIXSK-RSCLIENTS
export:         to   AS24971:AS-MAI-NIX-PEER announce AS24971:AS-MASTERCZ-SKNIX
remarks:
admin-c:        MAIc-RIPE
admin-c:        MZI-RIPE
tech-c:         MAIc-RIPE
tech-c:         MZI-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         MASTER-MNT
created:        2002-06-11T14:14:49Z
last-modified:  2025-10-26T06:21:55Z
source:         RIPE

organisation:   ORG-MIs2-RIPE
org-name:       MasterDC s.r.o.
country:        CZ
org-type:       LIR
address:        Purkynova 3030/35e
address:        612 00
address:        Brno
address:        CZECH REPUBLIC
phone:          +420 777919700
mnt-ref:        MASTER-MNT
mnt-ref:        RIPE-NCC-HM-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         MASTER-MNT
admin-c:        PV352-RIPE
admin-c:        JIPA-RIPE
admin-c:        MZI-RIPE
admin-c:        PZAK-RIPE
abuse-c:        MAIc-RIPE
created:        2004-04-17T11:04:37Z
last-modified:  2025-04-29T09:47:49Z
source:         RIPE # Filtered

role:           MasterDC contact
address:        MasterDC s.r.o
address:        Purkynova 3030/35e
address:        612 00 Brno
address:        Czech Republic
phone:          +420777919484
abuse-mailbox:  abuse@master.cz
admin-c:        PV352-RIPE
tech-c:         MZI-RIPE
tech-c:         JIPA-RIPE
tech-c:         MMAS-RIPE
nic-hdl:        MAIc-RIPE
mnt-by:         MASTER-MNT
created:        2009-03-28T19:44:57Z
last-modified:  2025-04-30T12:45:18Z
source:         RIPE # Filtered

person:         Martin Zidek
address:        MasterDC s.r.o.
address:        Cejl 20
address:        602 00 Brno
address:        Czech Republic
phone:          +420 777919700
nic-hdl:        MZI-RIPE
mnt-by:         MASTER-MNT
created:        2008-04-11T07:45:37Z
last-modified:  2025-04-30T12:45:18Z
source:         RIPE # Filtered

% This query was served by the RIPE Database Query Service version 1.121.1 (ABERDEEN)

Parsed Whois Response

Peers

AS Number Description Country
AS40994 Hohl IT e.U. AT
AS6881 NIX.CZ z.s.p.o. CZ
AS21320 GEANT Vereniging NL
AS6939 Hurricane Electric LLC US
AS6204 ZET.NET IP Transit RO
AS60602 Inovare-Prim SRL MD
AS44901 Belcloud LTD BG
AS22356 Durand do Brasil Ltda BR
AS9136 Wobcom GmbH DE
AS198150 SIACOM JSC GE

Upstreams

AS Number Description Country
AS39120 Convergenze S.p.A. IT
AS21320 GEANT Vereniging NL
AS14840 BR.Digital Telecom BR
AS9002 RETN Limited GB
AS1764 Next Layer Telekommunikationsdienstleistungs und Beratungs GmbH AT
AS263444 Open X Tecnologia Ltda BR
AS6939 Hurricane Electric LLC US
AS6204 ZET.NET IP Transit RO
AS5405 Inter.link GmbH DE
AS6663 Euroweb Romania S.R.L. RO

Downstreams

AS Number Description Country
AS207167 mapnet IT services s.r.o. CZ
AS21045 K net Technical International Group, s.r.o. CZ
AS48921 Yoursafe Holding B.V. NL
AS51134 Development 777 s.r.o. CZ
AS204957 GREEN FLOID LLC US
AS64481 Joint Venture Dragon Capital LLC UA
AS211085 mapnet IT services s.r.o. CZ

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Frequently Asked Questions

ASN AS24971 is an Autonomous System Number used to identify a network for BGP internet routing.
AS24971 is listed under MasterDC s.r.o..
Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.
Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.
WHOIS provides registration and contact context for ASN ownership, administration, and operational reference.
This page previews large ASN datasets. Use See more to load additional rows, and upgrade your plan to view complete peer, route, upstream, and downstream data.