Corporate Clients : E-mail : englishatwork@callan.co.th Tel : 022539371-2 Home Study : E-mail : info@callan.co.th Tel : 022539371-2 General Inquiries E-mail : info@callan.co.th For individual students please contact the school closest to you. Sukhumvit School 246 Times Square Building, 3rd Floor, Suhumvit Road Kongtoey, Bangkok 10110 Tel: +66(0)22539371-2 Fax: +66(0)22539373 E-mail: sukhumvit@callan.co.th Ladprao School Elephant Building, Tower B, 16th Floor, 3300/92 Phahonyotin Road Chatuchak, Bangkok 10900 Tel: +66(0)29374480-1 Fax: +66(0)29374482 E-mail: ladprao@callan.co.th