% APNIC found the following authoritative answer from: whois.apnic.net

% [whois.apnic.net]
% Whois data copyright terms    http://www.apnic.net/db/dbcopyright.html

% Information related to 'AS135581 - AS136505'

as-block:       AS135581 - AS136505
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:  2016-05-26T03:42:37Z
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 'AS136468'

% Abuse contact for 'AS136468' is 'ipreg@us.ibm.com'

aut-num:        AS136468
as-name:        IBM-SG-AP
descr:          IBM Singapore Pte Ltd
country:        SG
import:         from AS3758 action pref=100; accept ANY
import:         from AS4657 action pref=100; accept ANY
export:         to AS3758 announce AS10120
export:         to AS4657 announce AS10120
org:            ORG-ISPL9-AP
admin-c:        KP35-AP
tech-c:         MM93-AP
abuse-c:        AI693-AP
notify:         mohandas@sg.ibm.com
notify:         pangkb@sg.ibm.com
mnt-lower:      MAINT-AP-IBMSG
mnt-routes:     MAINT-AP-IBMSG
mnt-by:         APNIC-HM
mnt-irt:        IRT-IBM-SG
last-modified:  2025-08-11T06:49:18Z
source:         APNIC

irt:            IRT-IBM-SG
address:        9 Changi Business Park Central 1
address:
address:        Singapore 486048
phone:          +65 6418 9463
e-mail:         ipreg@us.ibm.com
abuse-mailbox:  ipreg@us.ibm.com
admin-c:        KP35-AP
tech-c:         MM93-AP
auth:           # Filtered
remarks:        ipreg@us.ibm.com was validated on 2026-04-07
mnt-by:         MAINT-AP-IBMSG
last-modified:  2026-06-24T11:40:29Z
source:         APNIC

organisation:   ORG-ISPL9-AP
org-name:       IBM Singapore Pte Ltd
org-type:       LIR
country:        SG
address:        The IBM Place II
address:        9 Changi Business Park II
address:        Changi Business Park Central 1
phone:          +65-6418-9463
fax-no:         +65-6587-1463
e-mail:         teokle@sg.ibm.com
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2023-09-05T02:14:48Z
source:         APNIC

role:           ABUSE IBMSG
country:        ZZ
address:        9 Changi Business Park Central 1
address:
address:        Singapore 486048
phone:          +65 6418 9463
e-mail:         ipreg@us.ibm.com
admin-c:        KP35-AP
tech-c:         MM93-AP
nic-hdl:        AI693-AP
remarks:        Generated from irt object IRT-IBM-SG
remarks:        ipreg@us.ibm.com was validated on 2026-04-07
abuse-mailbox:  ipreg@us.ibm.com
mnt-by:         APNIC-ABUSE
last-modified:  2026-04-07T13:10:49Z
source:         APNIC

person:         Koon Boon Pang
address:        Blk 2 Kaki Bukit Ave 1
address:        #06-00
address:        Singapore 419738
country:        SG
phone:          +65-840-9094
fax-no:         +65-748-9553
e-mail:         pangkb@sg.ibm.com
nic-hdl:        KP35-AP
mnt-by:         MAINT-NEW
last-modified:  2008-09-04T07:29:15Z
source:         APNIC

person:         Mohandas Muthusamy
address:        Blk 2 Kaki Bukit Ave 1
address:        #06-00
address:        Singapore 419738
country:        SG
phone:          +65-840-5392
fax-no:         +65-748-8809
e-mail:         mohandas@sg.ibm.com
nic-hdl:        MM93-AP
mnt-by:         MAINT-NEW
last-modified:  2008-09-04T07:29:15Z
source:         APNIC

% This query was served by the APNIC Whois Service version 1.88.48 (WHOIS-AU4)