20884 CZ-CTNET-AS CZ.CTNET Autonomous Sytem
Adjacency: 1 Upstream: 1 Downstream: 0
Upstream Adjacent AS list
AS5610 CZECHTELECOM CZECH TELECOM, a.s
Rank AS Type Originate Addr Space (pfx) Transit Addr space (pfx) Description 8760 AS20884 ORIGIN Originate: 5120 /19.68 Transit: 0 /0.00 CZ-CTNET-AS CZ.CTNET Autonomous Sytem
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 % 13493 AS20884 CZ-CTNET-AS CZ.CTNET Autonomous Sytem 2 0 0 2 0 0.00% Prefix AS Path Aggregation Suggestion 80.74.32.0/22 4637 12956 5610 20884 88.103.224.0/20 4637 12956 5610 20884 20884
Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.
AS20884 1 More Specifics 1 Total Advertisements CZ-CTNET-AS CZ.CTNET Autonomous Sytem
80.74.32.0/22 80.74.32.0/20
whois: 402603
IANA has recorded AS20884 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS20884\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 'AS20859 - AS20927'
as-block: AS20859 - AS20927
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: 2018-11-22T15:27:27Z
last-modified: 2018-11-22T15:27:27Z
source: RIPE
% Information related to 'AS20884'
% Abuse contact for 'AS20884' is 'abuse@o2.cz'
aut-num: AS20884
as-name: CZ-CTNET-AS
import: from AS5610 action pref=100; accept ANY
import: from AS3561 action pref=100; accept ANY
import: from AS28725 action pref=100; accept AS28725
import: from AS51328 action pref=100; accept AS51328
import: from AS198248 action pref=100; accept AS198248
import: from AS57294 action pref=100; accept AS57294
export: to AS5610 announce AS-CTNET
export: to AS3561 announce AS-CTNET
export: to AS28725 announce ANY
export: to AS51328 announce ANY
export: to AS198248 announce ANY
export: to AS57294 announce ANY
remarks: =====
remarks: customers
remarks: =====
remarks: COMANET-NETWORK
import: from AS51382 action pref = 850; accept AS51382
export: to AS51382 announce ANY;
remarks: ========
remarks: ON SEMICONDUCTOR CZECH REPUBLIC, s.r.o
import: from AS21942 action pref = 850; accept AS21942
export: to AS21942 announce {0.0.0.0/0};
remarks: =====
org: ORG-STaN1-RIPE
admin-c: CZO2-RIPE
tech-c: CZO2-RIPE
status: ASSIGNED
mnt-by: RIPE-NCC-END-MNT
mnt-by: CZCTNET-MNT
created: 1970-01-01T00:00:00Z
last-modified: 2023-05-26T07:57:52Z
source: RIPE
organisation: ORG-STaN1-RIPE
org-name: O2 Czech Republic, a.s.
country: CZ
reg-nr: 60193336
org-type: LIR
address: Za Brumlovkou 266/2
address: 140 22
address: Praha 4 - Michle
address: CZECH REPUBLIC
phone: +420 2 71466184
fax-no: +420 2 71464414
admin-c: VAKO1-RIPE
admin-c: MV96-RIPE
admin-c: HVJI1-RIPE
tech-c: CZO2-RIPE
abuse-c: AR14410-RIPE
mnt-ref: RIPE-NCC-HM-MNT
mnt-ref: AS5610-MTN
mnt-by: RIPE-NCC-HM-MNT
mnt-by: AS5610-MTN
created: 2004-04-17T11:04:17Z
last-modified: 2026-05-13T07:30:10Z
source: RIPE # Filtered
role: 5610-Tech-and-Admin
address: Za Brumlovkou 266/2
address: Praha 4 - Michle, PSC 140 22
nic-hdl: CZO2-RIPE
admin-c: VAKO1-RIPE
admin-c: MV96-RIPE
admin-c: HVJI1-RIPE
tech-c: VAKO1-RIPE
tech-c: HVJI1-RIPE
abuse-mailbox: abuse@o2.cz
org: ORG-STaN1-RIPE
mnt-by: AS5610-MTN
created: 2016-02-18T09:58:30Z
last-modified: 2018-04-20T10:44:21Z
source: RIPE # Filtered
% This query was served by the RIPE Database Query Service version 1.122.1 (ABERDEEN)