<Tr> <Th> Time zone </Th> <Td> AST (UTC - 4) </Td> </Tr> <Tr> <Th> Zip code </Th> <Td> 00775 </Td> </Tr> <P> Isla Culebra (Spanish pronunciation: (kuˈleβɾa), Snake Island) is an island - municipality of Puerto Rico and geographically part of the Virgin Islands . It is located approximately 17 miles (27 km) east of the Puerto Rican mainland, 12 miles (19 km) west of St. Thomas and 9 miles (14 km) north of Vieques . Culebra is spread over 5 wards and Culebra Pueblo (Dewey), the downtown area and the administrative center of the city . Residents of the island are known as Culebrenses . With a population of 1,818 as of the latest census, it is Puerto Rico's least populous municipality . </P> <P> Originally called Isla Pasaje and Isla de San Ildefonso, Culebra is also known as Isla Chiquita ("Little Island"), Cuna del Sol Borincano ("Cradle of the Puerto Rican Sun") and Última Virgen ("Last Virgin", due to its position at the end of the Virgin Islands archipelago). </P>

Where in the caribbean is culebra island located