24971 MASTER-AS - MasterDC s.r.o., CZ
Adjacency: 9 Upstream: 2 Downstream: 7
Upstream Adjacent AS list
AS9002 RETN-AS - RETN Limited, GB
AS1299 TWELVE99 - Arelion Sweden AB, SE
Downstream Adjacent AS list
AS207167 amccomp-master-brno - mapnet IT services s.r.o., CZ
AS51134 INTACTO-AS - Development 777 s.r.o., CZ
AS202857 CZ-AS - INIZIO Internet Media s.r.o., CZ
AS211085 amccomp-master-praha - mapnet IT services s.r.o., CZ
AS64481 Dragon-Capital-AS - Joint Venture Dragon Capital LLC, UA
AS21045 QnetCZ - K-net Technical International Group, s.r.o., CZ
AS204957 GREENFLOID-AS - GREEN FLOID LLC, US
Rank AS Type Originate Addr Space (pfx) Transit Addr space (pfx) Description 4058 AS24971 ORG+TRN Originate: 58880 /16.15 Transit: 9216 /18.83 MASTER-AS - MasterDC s.r.o., CZ
Aggregation Suggestions
Filter: Aggregates, Specifics
This report does not take into account conditions local to each origin AS in terms of policy or traffic engineering requirements, so this is an approximate guideline as to aggregation possibilities.
Rank AS AS Name Current Wthdw Aggte Annce Redctn % 16253 AS24971 MASTER-AS - MasterDC s.r.o., CZ 33 4 2 31 2 6.06% Prefix AS Path Aggregation Suggestion 5.180.200.0/22 4777 2516 1299 24971 37.140.220.0/24 4777 2516 1299 24971 37.205.8.0/21 4777 2516 1299 24971 + Announce - aggregate of 37.205.8.0/22 (4777 2516 1299 24971) and 37.205.12.0/22 (4777 2516 1299 24971) 37.205.8.0/22 4777 2516 1299 24971 - Withdrawn - aggregated with 37.205.12.0/22 (4777 2516 1299 24971) 37.205.12.0/22 4777 2516 1299 24971 - Withdrawn - aggregated with 37.205.8.0/22 (4777 2516 1299 24971) 77.93.192.0/19 4777 2516 1299 24971 80.79.16.0/20 4777 2516 1299 24971 81.31.32.0/20 4777 2516 1299 24971 83.167.224.0/19 4777 2516 1299 24971 83.223.52.0/24 4777 2516 1299 24971 85.118.128.0/21 4777 2516 1299 24971 89.185.224.0/19 4777 2516 1299 24971 91.213.160.0/24 4777 2516 1299 24971 91.214.192.0/22 4777 2516 1299 24971 91.216.179.0/24 4777 2516 1299 24971 91.226.216.0/22 4777 2516 1299 24971 92.63.56.0/24 4777 2516 1299 24971 130.193.16.0/24 4777 2516 1299 24971 149.62.144.0/21 4777 2516 1299 24971 176.227.168.0/23 4777 2516 1299 24971 178.238.32.0/20 4777 2516 1299 24971 185.8.164.0/22 4777 2516 1299 24971 + Announce - aggregate of 185.8.164.0/23 (4777 2516 1299 24971) and 185.8.166.0/23 (4777 2516 1299 24971) 185.8.164.0/23 4777 2516 1299 24971 - Withdrawn - aggregated with 185.8.166.0/23 (4777 2516 1299 24971) 185.8.166.0/23 4777 2516 1299 24971 - Withdrawn - aggregated with 185.8.164.0/23 (4777 2516 1299 24971) 185.25.184.0/22 4777 2516 1299 24971 185.32.160.0/22 4777 2516 1299 24971 185.58.40.0/22 4777 2516 1299 24971 185.85.164.0/22 4777 2516 1299 24971 185.145.160.0/22 4777 2516 1299 24971 185.239.216.0/22 4777 2516 1299 24971 188.213.234.0/23 4777 2516 1299 24971 188.215.18.0/23 4777 2516 1299 24971 193.169.160.0/23 4777 2516 1299 24971 194.145.180.0/22 4777 2516 1299 24971 195.140.252.0/22 4777 2516 1299 24971
Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.
AS24971 8 More Specifics 33 Total Advertisements MASTER-AS - MasterDC s.r.o., CZ
37.205.8.0/22 37.205.8.0/21
37.205.12.0/22 37.205.8.0/21
83.223.52.0/24 83.223.32.0/19
92.63.56.0/24 92.63.48.0/20
130.193.16.0/24 130.193.16.0/21
176.227.168.0/23 176.227.168.0/21
185.8.164.0/23 185.8.164.0/22
185.8.166.0/23 185.8.164.0/22
whois: 402603
IANA has recorded AS24971 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS24971\n % 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.
% 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 AS202051;
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: = INIZIO Internet Media s.r.o.
import: from AS202857 action pref=10; accept AS202857;
export: to AS202857 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: 2026-04-15T16:46:36Z
source: RIPE
organisation: ORG-MIs2-RIPE
org-name: MasterDC s.r.o.
country: CZ
reg-nr: 26277557
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: 2026-05-13T07:29:49Z
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
%ERROR:201: access denied for 2401:2000:6660:0:0:0:0:13
%
% Queries from your IP address have passed the daily limit of controlled objects.
% Access from your host has been temporarily denied.
% For more information, see
% https://docs.db.ripe.net/FAQ#why-did-i-receive-an-error-201-access-denied
% This query was served by the RIPE Database Query Service version 1.122.1 (SHETLAND)