<Dd> Trinidad and Tobago </Dd> <P> In the example above, the digits "12" refer to the delivery office in Diego Martin Regional Corporation; "01" to a certain delivery route served by that office; and "10" to a certain building or zone along that delivery route . </P> <P> Trinidad and Tobago Postal Corporation officially launched the system March 28, 2012, promising that residents and businesses would receive a postcard informing them of their new postal code "before the end of the year". In May 2016, the estimated completion date was given as "within a year or two ." </P> <P> In May 2011, TTPost said it planned to develop a postal code system in part because it is more efficient to sort mail using automated sorting machines, and in part because many areas in Trinidad and Tobago use vague or imprecise descriptive addresses based on "word of mouth and the use of landmarks". TTPost also said it also hoped develop a universal standard for addressing . </P>

Postal code for port of spain trinidad and tobago