Ships Companies Ports Documents Distances FAQ Contacts Antigua Time: GMT -4. International dialling code: +1 809. Territorial waters: Antigua claims a limit of 12nm for territorial waters and a limit of 200nm for fisheries jurisdiction. Capital city: St John's. PORT LATITUDE LONGITUDE REMARK UNCTAD TIME ZONE MAX DRAFT MAIN PORT DETAILS St John's 17° 06.0' N 061° 51.0' W Port Open AGSJO GMT -4 13.10   Details