% 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 'REK1-AP'

role:           REKIND HOSTMASTERS
address:        PT. Rekayasa Industri
address:        EPC company
address:        Jakarta Selatan
address:        Indonesia 12710
country:        ID
phone:          +62-21-7988700
fax-no:         +62-21-7949323
e-mail:         hostmaster@rekayasa.co.id
remarks:        spam and abuse report : abuse@rekayasa.co.id
remarks:        technical and routing : hostmaster@rekayasa.co.id
remarks:        administrative request : hostmaster@rekayasa.co.id
admin-c:        FY300-AP
tech-c:         TS385-AP
nic-hdl:        REK1-AP
remarks:        REKIND hostmasters role object
notify:         hostmaster@rekayasa.co.id
mnt-by:         MAINT-ID-REKINDNET
last-modified:  2011-12-06T00:11:09Z
source:         APNIC

person:         Ferizal Yusni
nic-hdl:        FY300-AP
e-mail:         ferizal@rekayasa.co.id
address:        PT. Rekayasa Industri
address:        Jl. Kalibata Timur 1 No.36
address:        Jakarta Selatan - Indonesia
phone:          +62-21-7988700
fax-no:         +62-21-7949323
country:        ID
mnt-by:         MAINT-ID-REKINDNET
last-modified:  2008-09-04T07:47:10Z
source:         APNIC

person:         Teja Santosa
nic-hdl:        TS385-AP
e-mail:         teja@rekayasa.co.id
address:        PT. Rekayasa Industri
address:        Jl. Kalibata Timur 1 no.36
address:        Jakarta Selatan
address:        Indonesia
phone:          +62-21-7988700
fax-no:         +62-21-7949323
country:        ID
mnt-by:         MAINT-ID-REKINDNET
last-modified:  2008-09-04T07:47:10Z
source:         APNIC

% This query was served by the APNIC Whois Service version 1.88.36-SNAPSHOT (WHOIS-AU5)