51840 CSL-AS, MT
Adjacency: 4 Upstream: 4 Downstream: 0
Upstream Adjacent AS list
AS13335 CLOUDFLARENET - Cloudflare, Inc., US
AS33874 VFM-AS Epic Communications Limited, MT
AS12709 MELITACABLE, MT
AS15735 DATASTREAM-NET, MT
Rank AS Type Originate Addr Space (pfx) Transit Addr space (pfx) Description 10469 AS51840 ORIGIN Originate: 9728 /18.75 Transit: 0 /0.00 CSL-AS, MT
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 % 6013 AS51840 CSL-AS, MT 25 12 4 17 8 32.00% Prefix AS Path Aggregation Suggestion 91.220.139.0/24 4777 13335 51840 185.27.56.0/22 4777 2497 1273 6758 33874 51840 185.27.56.0/22 4777 13335 51840 + Announce - aggregate of 185.27.56.0/23 (4777 13335 51840) and 185.27.58.0/23 (4777 13335 51840) 185.27.56.0/24 4777 13335 51840 - Withdrawn - aggregated with 185.27.57.0/24 (4777 13335 51840) 185.27.57.0/24 4777 13335 51840 - Withdrawn - aggregated with 185.27.56.0/24 (4777 13335 51840) 185.27.58.0/24 4777 13335 51840 - Withdrawn - aggregated with 185.27.59.0/24 (4777 13335 51840) 185.27.59.0/24 4777 13335 51840 - Withdrawn - aggregated with 185.27.58.0/24 (4777 13335 51840) 185.64.56.0/22 4777 2497 1273 6758 33874 51840 185.64.56.0/23 4777 13335 51840 + Announce - aggregate of 185.64.56.0/24 (4777 13335 51840) and 185.64.57.0/24 (4777 13335 51840) 185.64.56.0/24 4777 13335 51840 - Withdrawn - aggregated with 185.64.57.0/24 (4777 13335 51840) 185.64.57.0/24 4777 13335 51840 - Withdrawn - aggregated with 185.64.56.0/24 (4777 13335 51840) 185.64.58.0/24 4777 13335 51840 185.64.59.0/24 4777 2497 1299 12709 51840 185.176.196.0/24 4777 2497 1273 6758 33874 51840 185.176.197.0/24 4777 13335 51840 185.176.198.0/23 4777 2497 1299 12709 51840 185.176.198.0/23 4777 13335 51840 + Announce - aggregate of 185.176.198.0/24 (4777 13335 51840) and 185.176.199.0/24 (4777 13335 51840) 185.176.198.0/24 4777 13335 51840 - Withdrawn - aggregated with 185.176.199.0/24 (4777 13335 51840) 185.176.199.0/24 4777 13335 51840 - Withdrawn - aggregated with 185.176.198.0/24 (4777 13335 51840) 185.177.48.0/22 4777 2497 1299 12709 51840 185.177.48.0/23 4777 13335 51840 + Announce - aggregate of 185.177.48.0/24 (4777 13335 51840) and 185.177.49.0/24 (4777 13335 51840) 185.177.48.0/24 4777 13335 51840 - Withdrawn - aggregated with 185.177.49.0/24 (4777 13335 51840) 185.177.49.0/24 4777 13335 51840 - Withdrawn - aggregated with 185.177.48.0/24 (4777 13335 51840) 185.177.50.0/24 4777 2497 1273 6758 33874 51840 185.177.51.0/24 4777 2516 1299 15735 51840 185.218.148.0/22 4777 2516 1299 15735 51840 185.218.148.0/24 4777 2516 1299 15735 51840 - Withdrawn - matching aggregate 185.218.148.0/22 4777 2516 1299 15735 51840 185.218.150.0/24 4777 13335 51840 185.218.151.0/24 4777 2516 1299 15735 51840 - Withdrawn - matching aggregate 185.218.148.0/22 4777 2516 1299 15735 51840
Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.
AS51840 20 More Specifics 25 Total Advertisements CSL-AS, MT
185.27.56.0/24 185.27.56.0/22
185.27.57.0/24 185.27.56.0/22
185.27.58.0/24 185.27.56.0/22
185.27.59.0/24 185.27.56.0/22
185.64.56.0/24 185.64.56.0/22
185.64.57.0/24 185.64.56.0/22
185.64.58.0/24 185.64.56.0/22
185.64.59.0/24 185.64.56.0/22
185.176.196.0/24 185.176.196.0/22
185.176.197.0/24 185.176.196.0/22
185.176.198.0/23 185.176.196.0/22
185.176.198.0/24 185.176.196.0/22
185.176.199.0/24 185.176.196.0/22
185.177.48.0/24 185.177.48.0/22
185.177.49.0/24 185.177.48.0/22
185.177.50.0/24 185.177.48.0/22
185.177.51.0/24 185.177.48.0/22
185.218.148.0/24 185.218.148.0/22
185.218.150.0/24 185.218.148.0/22
185.218.151.0/24 185.218.148.0/22
whois: 402332
IANA has recorded AS51840 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS51840\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 'AS51819 - AS51843'
as-block: AS51819 - AS51843
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: 2026-02-02T15:31:00Z
last-modified: 2026-02-02T15:31:00Z
source: RIPE
% Information related to 'AS51840'
% Abuse contact for 'AS51840' is 'abuse@csl.com.mt'
aut-num: AS51840
as-name: CSL-AS
org: ORG-CSL22-RIPE
import: from AS33874 accept ANY
import: from AS15735 accept ANY
export: to AS33874 announce AS51840
export: to AS15735 announce AS51840
admin-c: HMD3-RIPE
tech-c: AS16338-RIPE
status: ASSIGNED
mnt-by: RIPE-NCC-END-MNT
mnt-by: MNT-CSL-AS
created: 2010-11-15T07:46:43Z
last-modified: 2018-09-04T10:55:56Z
source: RIPE
organisation: ORG-CSL22-RIPE
org-name: CSL Data Centre Services Limited
country: MT
org-type: LIR
address: Demajo Technology Centre, Dun Karm Street
address: BKR9038
address: Birkirkara
address: MALTA
phone: +356 79790066
phone: +35622767676
fax-no: +35622767654
mnt-ref: MNT-CSL-AS
mnt-ref: RIPE-NCC-HM-MNT
mnt-by: RIPE-NCC-HM-MNT
mnt-by: MNT-CSL-AS
admin-c: CSL53-RIPE
abuse-c: CA5425-RIPE
created: 2013-05-22T10:47:21Z
last-modified: 2020-12-16T13:27:54Z
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 1.121.2 (ABERDEEN)