En Trinité-et-Tobago, les numéros de téléphone comptent généralement 7 chiffres. Le format d'affichage des numéros de téléphone est généralement xxx xxxx, avec des préfixes courants tels que 271,272,273,274,275,276,277,278,279,280,281,282,283,284,285,286,287,288,289,290,291,292,293,294,295,296,297,298,299,301,302,303,304,305,306,307,308,309,310,312,313,314,315,316,317,318,319,320,321,322,323,324,325,326,327,328,329,330,331,332,333,334,335,336,337,338,339,340,341,342,343,344,345,346,347,348,349,350,351,352,353,354,355,356,357,358,359,360,361,362,363,364,365,366,367,368,369,370,371,372,373,374,375,376,377,378,379,380,381,382,383,384,385,386,387,388,389,390,391,392,393,394,395,396,397,398,399,460,461,462,463,464,465,466,467,468,469,470,471,472,473,474,475,476,477,478,479,480,481,482,483,484,490,491,492,493,494,495,496,497,498,499,620,678,680,681,682,683,684,685,686,687,688,689,710,712,713,714,715,716,717,718,719,720,721,722,723,724,725,726,727,728,729,730,731,732,733,734,735,736,737,738,739,740,741,742,743,744,745,746,747,748,749,750,751,752,753,754,755,756,757,758,759,760,761,762,763,764,765,766,767,768,769,770,771,772,773,774,775,776,777,778,779,780,781,782,783,784,785,786,787,788,789,790,791,792,793,794,795,796,797,798,799,868.
L'indicatif de numérotation international pour Trinité-et-Tobago est 1868. Lors d'un appel international vers ce pays, vous devez ajouter le code du pays avant le numéro. Le format de numéro complet est : +1868 xxx xxxx.