@VLAZ A normalized version,
{{'18557409516', '8557409516'}}
, of that pattern is already on the number blacklist. You can use
!!/bisect-number 1-855-740-9516
to determine which entries on the number lists match that pattern, which would tell you: Matched by
1-855-740-9516
on
line 3661 of blacklisted_numbers.txt: 1-855-740-9516 found verbatim; 8557409516 found normalized