25512 CDT-AS The Czech Republic, CZ
Adjacency: 22 Upstream: 3 Downstream: 19
Upstream Adjacent AS list
AS6461 ZAYO-6461 - Zayo Bandwidth, US
AS1299 TWELVE99 Arelion, fka Telia Carrier, SE
AS174 COGENT-174 - Cogent Communications, LLC, US
Downstream Adjacent AS list
AS20708 SKODA-AUTO Tr. Vaclava Klementa 869, CZ
AS20609 KAZACZSRO, CZ
AS216450 PRGAERO, CZ
AS6881 NIXCZ NIX.CZ z.s.p.o., CZ
AS206159 CZ-FRESH, CZ
AS51331 MODERNTV, CZ
AS200678 ARENIS, CZ
AS50975 AVX_AS, CZ
AS47131 PH, CZ
AS43614 ECONOMIA-, CZ
AS56827 ASMIRNET, CZ
AS56450 ALBERON_AS, CZ
AS213387 TESUNET, CZ
AS3161 ASITPROFI, CZ
AS200355 CADCANET, SK
AS43507 RETE-AS, CZ
AS197550 ASINET4YOU, CZ
AS51524 ASNETDELUXE, CZ
AS47868 SUPRO-AS AS SUPRO-NET, CZ
Rank AS Type Originate Addr Space (pfx) Transit Addr space (pfx) Description 2120 AS25512 ORG+TRN Originate: 117760 /15.15 Transit: 34816 /16.91 CDT-AS The Czech Republic, 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 % 37584 AS25512 CDT-AS The Czech Republic, CZ 11 0 0 11 0 0.00% Prefix AS Path Aggregation Suggestion 81.19.32.0/20 4608 7575 6461 25512 82.117.128.0/19 4608 7575 6461 25512 82.202.64.0/18 4608 7575 6461 25512 85.13.64.0/18 4608 7575 6461 25512 85.184.16.0/20 4608 7575 6461 25512 89.203.128.0/17 4608 7575 6461 25512 131.117.192.0/21 4608 7575 6461 25512 185.134.0.0/22 4777 2516 1299 25512 195.146.96.0/19 4777 2516 1299 25512 212.11.96.0/19 4608 7575 6461 25512 213.235.128.0/18 4608 7575 6461 25512
whois: 402332
IANA has recorded AS25512 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS25512\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 'AS25365 - AS25542'
as-block: AS25365 - AS25542
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 'AS25512'
% Abuse contact for 'AS25512' is 'abuse@cdt.cz'
aut-num: AS25512
as-name: CDT-AS
descr: The Czech Republic
org: ORG-CTa3-RIPE
remarks: # TRANSIT
import: from AS1299 accept ANY # TELIA
export: to AS1299 announce AS-CDT-NETWORKS
import: from AS174 accept ANY # COGENT
export: to AS174 announce AS-CDT-NETWORKS
remarks: # Peering
import: from AS6881 accept ANY # NIXCZ
export: to AS6881 announce AS-CDT-NETWORKS
import: from AS47200 accept ANY # NIX Routeservers
export: to AS47200 announce ANY
import: from AS47627 accept ANY # NIXSK Routeservers
export: to AS47627 announce ANY
remarks: # CUSTOMERS
import: from AS6881 accept ANY # NIX
export: to AS6881 announce ANY
import: from AS21241 accept ANY # MUZO
export: to AS21241 announce ANY
import: from AS34040 accept ANY # TTNET
export: to AS34040 announce ANY
import: from AS35046 accept ANY # Omega
export: to AS35046 announce ANY
import: from AS43507 accept ANY # RETE
export: to AS43507 announce ANY
import: from AS44424 accept ANY # MALL
export: to AS44424 announce ANY
import: from AS47767 accept ANY # RCO
export: to AS47767 announce ANY
import: from AS47868 accept ANY # SUPRO
export: to AS47868 announce ANY
import: from AS48417 accept ANY # ITS
export: to AS48417 announce ANY
import: from AS56450 accept ANY # ALBERON
export: to AS56450 announce ANY
import: from AS197550 accept ANY # INTERNET4YOU
export: to AS197550 announce ANY
import: from AS49101 accept ANY # KTCZ
export: to AS49101 announce ANY
import: from AS51524 accept ANY # ATESACEK
export: to AS51524 announce ANY
import: from AS56827 accept ANY # MIRNET SRO
export: to AS56827 announce ANY
import: from AS198403 accept ANY # MATRIGO
export: to AS198403 announce ANY
import: from AS56717 accept ANY # RESAL
export: to AS56717 announce ANY
import: from AS197698 accept ANY # D-H-T
export: to AS197698 announce ANY
import: from AS47131 accept ANY # PHSPOL
export: to AS47131 announce ANY
import: from AS43614 accept ANY # ECONOMIA
export: to AS43614 announce ANY
import: from AS56456 accept ANY # C2NET
export: to AS56456 announce ANY
import: from AS20708 accept ANY # SKODA AUTO a.s.
export: to AS20708 announce ANY
import: from AS62178 accept ANY # MASTER IT
export: to AS62178 announce ANY
import: from AS49488 accept ANY # TLD via NIX
export: to AS49488 announce ANY
import: from AS60275 accept ANY # RVTECH
export: to AS60275 announce ANY
import: from AS3161 accept ANY # IT Profi Vimperk
export: to AS3161 announce ANY
import: from AS20609 accept ANY # Kaza
export: to AS20609 announce ANY
import: from AS30738 accept ANY # Netart
export: to AS30738 announce ANY
import: from AS50975 accept ANY # AVX_AS
export: to AS50975 announce ANY
import: from AS62159 accept ANY # HAPPY Technik
export: to AS62159 announce ANY
import: from AS197019 accept ANY # Wedos
export: to AS197019 announce ANY
import: from AS200155 accept ANY # TCPISEK-CZ
export: to AS200155 announce ANY
import: from AS200355 accept ANY # CADCANET
export: to AS200355 announce ANY
import: from AS201457 accept ANY # KOOPERATIVA-AS
export: to AS201457 announce ANY
import: from AS42908 accept ANY # AS-NORDICTELECOM
export: to AS42908 announce ANY
import: from AS213387 accept ANY # TESUNET
export: to AS213387 announce ANY
import: from AS206159 accept ANY # Fresh Data
export: to AS206159 announce ANY
remarks: End of list
admin-c: CDT-RIPE
tech-c: CDT-RIPE
status: ASSIGNED
mnt-by: RIPE-NCC-END-MNT
mnt-by: CDT-MNT
created: 2002-12-17T14:28:40Z
last-modified: 2025-07-29T11:30:12Z
source: RIPE
organisation: ORG-CTa3-RIPE
org-name: CD-Telematika a.s.
country: CZ
org-type: LIR
address: Pernerova 2819/2a
address: 130 00,
address: Praha 3
address: CZECH REPUBLIC
phone: +420210021695
fax-no: +420210021610
admin-c: MS58623-RIPE
admin-c: PL1116-RIPE
abuse-c: CDT-RIPE
mnt-ref: RIPE-NCC-HM-MNT
mnt-ref: CDT-MNT
mnt-by: RIPE-NCC-HM-MNT
mnt-by: CDT-MNT
created: 2004-04-17T11:04:09Z
last-modified: 2025-09-02T12:06:21Z
source: RIPE # Filtered
role: CDT hostmaster
address: CD-Telematika a.s.
address: Pod Taborem 6
address: Praha 9
address: 191 00
address: The Czech Republic
phone: +420 210021 685
fax-no: +420 210021 699
remarks: --------------------------------------------------
remarks: abuse and spam reports please mail to abuse@cdt.cz
remarks:
remarks: peering and technical communication
remarks: mail to ip(at)cdt.cz
remarks: --------------------------------------------------
admin-c: PL1116-RIPE
admin-c: CJ167-RIPE
admin-c: ZP642-RIPE
admin-c: MS58623-RIPE
tech-c: PL1116-RIPE
tech-c: CJ167-RIPE
tech-c: ZP642-RIPE
tech-c: MS58623-RIPE
abuse-mailbox: abuse@cdt.cz
nic-hdl: CDT-RIPE
mnt-by: CDT-MNT
created: 2004-01-26T14:58:45Z
last-modified: 2025-09-02T12:07:16Z
source: RIPE # Filtered
% This query was served by the RIPE Database Query Service version 1.121.2 (ABERDEEN)