43740 ZTK-AS, RU
Adjacency: 4 Upstream: 3 Downstream: 1
Upstream Adjacent AS list
AS12389 ROSTELECOM-AS, RU
AS3216 SOVAM-AS, RU
AS8359 MTS, RU
Downstream Adjacent AS list
AS65102 -Private Use AS-, ZZ
Rank AS Type Originate Addr Space (pfx) Transit Addr space (pfx) Description 25344 AS43740 ORIGIN Originate: 2048 /21.00 Transit: 0 /0.00 ZTK-AS, RU
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 % 22998 AS43740 ZTK-AS, RU 7 2 1 6 1 14.29% Prefix AS Path Aggregation Suggestion 185.149.160.0/24 6939 12389 43740 185.149.161.0/24 37100 3216 43740 185.149.162.0/23 37100 8359 43740 + Announce - aggregate of 185.149.162.0/24 (37100 8359 43740) and 185.149.163.0/24 (37100 8359 43740) 185.149.162.0/24 37100 8359 43740 - Withdrawn - aggregated with 185.149.163.0/24 (37100 8359 43740) 185.149.163.0/24 37100 8359 43740 - Withdrawn - aggregated with 185.149.162.0/24 (37100 8359 43740) 185.179.224.0/24 6939 12389 43740 185.179.226.0/23 6939 12389 43740 194.140.247.0/24 6939 12389 43740
Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.
AS43740 4 More Specifics 4 Total Advertisements ZTK-AS, RU
185.149.161.0/24 185.149.160.0/22
185.179.224.0/24 185.179.224.0/22
185.179.226.0/23 185.179.224.0/22
185.179.226.0/24 185.179.224.0/22
185.149.162.0/24 185.149.160.0/22
185.149.163.0/24 185.149.160.0/22
Prefixes added and withdrawn by this origin AS in the past 7 days.
- 185.149.162.0/24 Withdrawn
- 185.149.163.0/24 Withdrawn
whois: 402590
IANA has recorded AS43740 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS43740\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 'AS43075 - AS44168'
as-block: AS43075 - AS44168
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: 2023-12-11T15:09:58Z
last-modified: 2023-12-11T15:09:58Z
source: RIPE
% Information related to 'AS43740'
% Abuse contact for 'AS43740' is 'abuse@zonatelecom.ru'
aut-num: AS43740
as-name: ZTK-AS
org: ORG-STL140-RIPE
import: from AS3216 accept ANY
export: to AS3216 announce AS43740
import: from AS12389 accept ANY
export: to AS12389 announce AS43740
import: from AS35401 accept ANY
export: to AS35401 announce AS43740
import: from AS8359 accept ANY
export: to AS8359 announce AS43740
import: from AS199599 accept ANY
export: to AS199599 announce AS43740
import: from AS29226 accept ANY
export: to AS29226 announce AS43740
import: from AS57724 accept ANY
export: to AS57724 announce AS43740
import: from AS201706 accept ANY
export: to AS201706 announce AS43740
admin-c: MA25247-RIPE
tech-c: MA25247-RIPE
status: ASSIGNED
mnt-by: RIPE-NCC-END-MNT
mnt-by: lir-ru-ztk-1-MNT
created: 2016-12-22T10:47:14Z
last-modified: 2025-12-23T22:10:55Z
source: RIPE
organisation: ORG-STL140-RIPE
org-name: Secure Telecommunication LLC
country: RU
reg-nr: 1207100006332
org-type: LIR
address: Pushkinskaya 23
address: 300041
address: Tula
address: RUSSIAN FEDERATION
phone: +74872604321
admin-c: MA25247-RIPE
tech-c: MA25247-RIPE
abuse-c: AR67570-RIPE
mnt-ref: lir-ru-ztk-1-MNT
mnt-by: RIPE-NCC-HM-MNT
mnt-by: lir-ru-ztk-1-MNT
created: 2022-02-08T10:42:19Z
last-modified: 2026-05-13T07:39:05Z
source: RIPE # Filtered
%ERROR:201: access denied for 2401:2000:6660:0:0:0:0:13
%
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% Access from your host has been temporarily denied.
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% This query was served by the RIPE Database Query Service version 1.122.1 (DEXTER)