203951 TOSAN, IR
Adjacency: 2 Upstream: 2 Downstream: 0
Upstream Adjacent AS list
AS58224 TCI, IR
AS200370 FPCC-AS, IR
Rank AS Type Originate Addr Space (pfx) Transit Addr space (pfx) Description 29411 AS203951 ORIGIN Originate: 1792 /21.19 Transit: 0 /0.00 TOSAN, IR
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 % 26702 AS203951 TOSAN, IR 4 1 0 3 1 25.00% Prefix AS Path Aggregation Suggestion 185.119.4.0/22 4777 2497 5511 49666 12880 200370 203951 185.119.4.0/24 4777 2497 12389 49666 48159 58224 203951 185.119.6.0/24 4777 2497 12389 49666 48159 58224 203951 185.119.7.0/24 4777 2497 5511 49666 12880 200370 203951 - Withdrawn - matching aggregate 185.119.4.0/22 4777 2497 5511 49666 12880 200370 203951
Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.
AS203951 3 More Specifics 4 Total Advertisements TOSAN, IR
185.119.4.0/24 185.119.4.0/22
185.119.6.0/24 185.119.4.0/22
185.119.7.0/24 185.119.4.0/22
whois: 402332
IANA has recorded AS203951 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS203951\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 'AS203940 - AS205662'
as-block: AS203940 - AS205662
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: 2026-03-05T15:29:31Z
last-modified: 2026-03-05T15:29:31Z
source: RIPE
% Information related to 'AS203951'
% Abuse contact for 'AS203951' is 'ripe-manager@tosan.com'
aut-num: AS203951
as-name: TOSAN
org: ORG-TSNN2-RIPE
import: from AS41881 accept ANY
export: to AS41881 announce AS203951
import: from AS58224 accept ANY
export: to AS58224 announce AS203951
admin-c: AAS515-RIPE
tech-c: AAS515-RIPE
status: ASSIGNED
mnt-by: RIPE-NCC-END-MNT
mnt-by: tosan
created: 2015-09-28T09:31:52Z
last-modified: 2019-09-14T06:07:54Z
source: RIPE
organisation: ORG-TSNN2-RIPE
org-name: Toseh Samanehay-e Narmafzari-e Negin (Tosan) PJSC
country: IR
org-type: LIR
address: No.10, Noor Dd. End, Nelson Mandela Africa Ave.
address: 1917733376
address: Tehran
address: IRAN, ISLAMIC REPUBLIC OF
phone: +982182198000
fax-no: +982188657824
reg-nr: 10103637809 // 323417
abuse-c: AC28637-RIPE
mnt-ref: tosan
mnt-ref: RIPE-NCC-HM-MNT
mnt-by: RIPE-NCC-HM-MNT
mnt-by: tosan
created: 2015-08-26T15:11:08Z
last-modified: 2026-04-29T05:35:19Z
source: RIPE # Filtered
%ERROR:201: access denied for 2401:2000:6660:0:0:0:0:13
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% This query was served by the RIPE Database Query Service version 1.122 (BUSA)