^start of line
?repeats the group contents below at most once:
\+the literal + (4310 / 538 / 2B16)
\d{3}a digit, repeated exactly 3 times
\s?optionally matches any whitespace character
\(?optionally matches the literal ( (4010 / 508 / 2816)
6the literal 6 (5410 / 668 / 3616)
\d{2}a digit, repeated exactly 2 times
\)?optionally matches the literal ) (4110 / 518 / 2916)
*matches any number of characters from the set below:
\sany whitespace character
-the literal - (4510 / 558 / 2D16)
\d{2}a digit, repeated exactly 2 times
*matches any number of characters from the set below:
\sany whitespace character
-the literal - (4510 / 558 / 2D16)
\d{2}a digit, repeated exactly 2 times
*matches any number of characters from the set below:
\sany whitespace character
-the literal - (4510 / 558 / 2D16)
\d{2}a digit, repeated exactly 2 times
$end of line
g modifier: global. Finds all matches instead of stopping after the first
m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string