@Anerdw A normalized version,
{{'07439121890'}}
, of that pattern is already on the number blacklist. You can use
!!/bisect-number 0743-91+21-890
to determine which entries on the number lists match that pattern, which would tell you: Matched by
0743-91+21-890
on
line 1775 of blacklisted_numbers.txt: 0743-91+21-890 found verbatim