^start of string
?repeats the group contents below at most once:
1the literal 1 (4910 / 618 / 3116)
\s?optionally matches any whitespace character
?repeats the group contents below at most once:
\d{6}a digit, repeated exactly 6 times
\(the literal ( (4010 / 508 / 2816)
\d{3}a digit, repeated exactly 3 times
\)the literal ) (4110 / 518 / 2916)
\d{3}a digit, repeated exactly 3 times
?matches at most one character from the set below:
\sany whitespace character
\-the literal - (4510 / 558 / 2D16)
\d{3}a digit, repeated exactly 3 times
?matches at most one character from the set below:
\sany whitespace character
\-the literal - (4510 / 558 / 2D16)
\d{4}a digit, repeated exactly 4 times
$end of string, or before its final line terminator
g modifier: global. Finds all matches instead of stopping after the first