all your numbers belong to SingTel City South Telephone Exchange
at Choon Guan St, a annexe building of International Plaza.
So the numbers are likely to be in the neighbouring vicinity e.g.
Tg Pagar, Spottiswoode, Marina South, Shenton Way, Marina/Suntec,
City Hall, Neil Rd and Maxwell area.
the subs 02/27/31/39 do not have fixed vicinities.
