@tripleee A normalized version,
{{'17863811438', '7863811438'}}
, of that pattern is already on the number blacklist. You can use
!!/bisect-number 7863811438(?#IS NorAm)
to determine which entries on the number lists match that pattern, which would tell you: Matched by
7863811438(?#IS NorAm)
on
line 858 of blacklisted_numbers.txt: 7863811438 found verbatim