International Phone Number (Loose) in GO

Match international phone numbers in a variety of loose formats including country codes, area codes, and separators.

Pattern

\+?[1-9]\d{0,3}[\s.\-]?(?:\(?\d{1,4}\)?[\s.\-]?){2,4}\d{1,9}   (flags: g)

Go (RE2) code

package main

import (
	"fmt"
	"regexp"
)

func main() {
	re := regexp.MustCompile(`\+?[1-9]\d{0,3}[\s.\-]?(?:\(?\d{1,4}\)?[\s.\-]?){2,4}\d{1,9}`)
	input := `+1 (415) 555-2671`
	for _, match := range re.FindAllString(input, -1) {
		fmt.Println(match)
	}
}

Uses `regexp.MustCompile` (panics on bad patterns at startup) and `FindAllString` for all matches.

How the pattern works

Examples

Same pattern, other engines