@Makyen A normalized version,
{{'8445399831', '18445399831'}}
, of that pattern is already on the number blacklist. You can use
!!/bisect-number 1 844 5399831
to determine which entries on the number lists match that pattern, which would tell you: Matched by
+1(844)-539-9831
on
line 160 of blacklisted_numbers.txt: 8445399831 found normalized; 18445399831 found normalized