US Phone Number in GO

\(?\d{3}\)?[\s.\-]?\d{3}[\s.\-]?\d{4}   (flags: g)

package main

import (
	"fmt"
	"regexp"
)

func main() {
	re := regexp.MustCompile(`\(?\d{3}\)?[\s.\-]?\d{3}[\s.\-]?\d{4}`)
	input := `(555) 867-5309`
	for _, match := range re.FindAllString(input, -1) {
		fmt.Println(match)
	}
}