Negative Lookahead(?!(?:000|666|9)) Non-Capturing Group(?:000|666|9) 9the literal 9 (5710 / 718 / 3916)
\d{3}a Unicode decimal digit, repeated exactly 3 times
-the literal - (4510 / 558 / 2D16)
\d{2}a Unicode decimal digit, repeated exactly 2 times
-the literal - (4510 / 558 / 2D16)
Negative Lookahead(?!0000) 0000the literal text 0000 \d{4}a Unicode decimal digit, repeated exactly 4 times
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