Portuguese phone number. The +351 country code is required rather than optional, because Portugal has no trunk prefix and a number written without the country code is nine bare digits, exactly the shape of a Portuguese tax number.
Label: PT_PHONE
(?<![\w+])\+351(?:[\s.-]?\d){9}(?!\w)Telefone para +351 912 345 678 depois das nove. → +351 912 345 678A loja atende no +351 21 123 4567. → +351 21 123 4567O ramal e 912 345Contribuinte 123 456 789Tags: pt, contact