Callsign blocks:- TE TI. ISO 3166 code:- CRI.NA Timezone:- Amateur Allocations are as follows:- TE2 TI2 = San Jose TE3 TI3 = Cartago TE4 TI4 = Heredia TE5 TI5 = Alajuela TE6 TI6 = Limon TE7 TI7 = Peninsula de Nicïya TE8 TI8 = Puntarenas & Golfito TE9 TI9 = Cocos Island