58912 CTSL-BD - Chittagong Telecom Services Ltd, BD
Adjacency: 2 Upstream: 2 Downstream: 0
Upstream Adjacent AS list
AS139009 WSCL-AS-AP - Windstream Communication Limited, BD
AS58717 SUMMITCOMMUNICATIONS-BD - Summit Communications Ltd, BD
Rank AS Type Originate Addr Space (pfx) Transit Addr space (pfx) Description 25539 AS58912 ORIGIN Originate: 2048 /21.00 Transit: 0 /0.00 CTSL-BD - Chittagong Telecom Services Ltd, BD
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 % 13403 AS58912 CTSL-BD - Chittagong Telecom Services Ltd, BD 8 4 1 5 3 37.50% Prefix AS Path Aggregation Suggestion 45.124.12.0/24 4777 2497 2914 132602 139009 58912 45.124.13.0/24 4777 4713 2914 58717 58912 58912 58912 45.124.14.0/24 4777 4713 2914 58717 58912 58912 58912 45.124.15.0/24 4777 2497 2914 132602 139009 58912 103.25.80.0/22 4777 4713 2914 58717 58912 58912 58912 + Announce - aggregate of 103.25.80.0/23 (4777 4713 2914 58717 58912 58912 58912) and 103.25.82.0/23 (4777 4713 2914 58717 58912 58912 58912) 103.25.80.0/24 4777 4713 2914 58717 58912 58912 58912 - Withdrawn - aggregated with 103.25.81.0/24 (4777 4713 2914 58717 58912 58912 58912) 103.25.81.0/24 4777 4713 2914 58717 58912 58912 58912 - Withdrawn - aggregated with 103.25.80.0/24 (4777 4713 2914 58717 58912 58912 58912) 103.25.82.0/24 4777 4713 2914 58717 58912 58912 58912 - Withdrawn - aggregated with 103.25.83.0/24 (4777 4713 2914 58717 58912 58912 58912) 103.25.83.0/24 4777 4713 2914 58717 58912 58912 58912 - Withdrawn - aggregated with 103.25.82.0/24 (4777 4713 2914 58717 58912 58912 58912)
Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.
AS58912 8 More Specifics 8 Total Advertisements CTSL-BD - Chittagong Telecom Services Ltd, BD
45.124.12.0/24 45.124.12.0/22
45.124.13.0/24 45.124.12.0/22
45.124.14.0/24 45.124.12.0/22
45.124.15.0/24 45.124.12.0/22
103.25.80.0/24 103.25.80.0/22
103.25.81.0/24 103.25.80.0/22
103.25.82.0/24 103.25.80.0/22
103.25.83.0/24 103.25.80.0/22
whois: 402603
IANA has recorded AS58912 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS58912\n % [whois.apnic.net]
% Whois data copyright terms http://www.apnic.net/db/dbcopyright.html
% Information related to 'AS58368 - AS59391'
as-block: AS58368 - AS59391
descr: APNIC ASN block
remarks: These AS numbers are further assigned by APNIC
remarks: to APNIC members and end-users in the APNIC region
admin-c: HM20-AP
tech-c: HM20-AP
mnt-by: APNIC-HM
mnt-lower: APNIC-HM
last-modified: 2011-08-10T06:21:41Z
source: APNIC
role: APNIC Hostmaster
address: 6 Cordelia Street
address: South Brisbane
address: QLD 4101
country: AU
phone: +61 7 3858 3100
fax-no: +61 7 3858 3199
e-mail: helpdesk@apnic.net
admin-c: AMS11-AP
tech-c: AH256-AP
nic-hdl: HM20-AP
remarks: Administrator for APNIC
notify: hostmaster@apnic.net
mnt-by: MAINT-APNIC-AP
last-modified: 2013-10-23T04:06:51Z
source: APNIC
% Information related to 'AS58912'
% Abuse contact for 'AS58912' is 'info@ctgtel.net'
aut-num: AS58912
as-name: CTSL-BD
descr: Chittagong Telecom Services Ltd
country: BD
org: ORG-CTSL1-AP
admin-c: CTSL2-AP
tech-c: CTSL2-AP
abuse-c: AC2149-AP
mnt-lower: MAINT-CTSL-BD
mnt-routes: MAINT-CTSL-BD
mnt-by: APNIC-HM
mnt-irt: IRT-CTSL-BD
last-modified: 2020-10-05T22:46:12Z
source: APNIC
irt: IRT-CTSL-BD
address: Chittagong Telecom Services Ltd.
address: Progressive Tower, 1st Floor, 1837, Sk. Mujib Road, Agrabad, Chittagong-4100.
e-mail: azim@ctgtel.net
abuse-mailbox: info@ctgtel.net
admin-c: CTSL2-AP
tech-c: CTSL2-AP
auth: # Filtered
remarks: azim@ctgtel.net was validated on 2025-12-03
remarks: info@ctgtel.net was validated on 2025-12-17
mnt-by: MAINT-CTSL-BD
last-modified: 2025-12-17T03:54:31Z
source: APNIC
organisation: ORG-CTSL1-AP
org-name: Chittagong Telecom Services Limited
org-type: LIR
country: BD
address: Progressive Tower (1st Floor)
address: 1837, Sheikh Mujib Road,
address: Agrabad
phone: +8809638660066
e-mail: info@ctgtel.net
mnt-ref: APNIC-HM
mnt-by: APNIC-HM
last-modified: 2023-12-03T13:02:02Z
source: APNIC
role: ABUSE CTSLBD
country: ZZ
address: Chittagong Telecom Services Ltd.
address: Progressive Tower, 1st Floor, 1837, Sk. Mujib Road, Agrabad, Chittagong-4100.
phone: +000000000
e-mail: azim@ctgtel.net
admin-c: CTSL2-AP
tech-c: CTSL2-AP
nic-hdl: AC2149-AP
remarks: Generated from irt object IRT-CTSL-BD
remarks: azim@ctgtel.net was validated on 2025-12-03
remarks: info@ctgtel.net was validated on 2025-12-17
abuse-mailbox: info@ctgtel.net
mnt-by: APNIC-ABUSE
last-modified: 2025-12-17T03:54:56Z
source: APNIC
role: Chittagong Telecom Services Limited administrator
address: CTGTEL, Progressive Tower (1st Floor), 1837, Sheikh Mujib Road, Agrabad, Chittagong
country: BD
phone: +88 01713428098
fax-no: +88 01713428098
e-mail: azim@ctgtel.net
admin-c: CTSL2-AP
tech-c: CTSL2-AP
nic-hdl: CTSL2-AP
mnt-by: MAINT-CTSL-BD
last-modified: 2023-12-03T12:32:46Z
source: APNIC
% This query was served by the APNIC Whois Service version 1.88.48 (WHOIS-AU5)