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Puerto Rico is on the North American Numbering Plan under +1, with two area codes: 787 and 939. It is a US territory, so numbers look and route like domestic ones. Spanish is the main written language, and á, í, ó and ú all fall outside GSM-7 — a Spanish-language message with those letters is unicode at 70 characters a segment, though ñ, é and ¿ are covered.