@Cow A normalized version,
{{'8557384265', '18557384265'}}
, of that pattern is already on the number blacklist. You can use
!!/bisect-number 18557384265
to determine which entries on the number lists match that pattern, which would tell you: Matched by
18557384265
on
line 2829 of blacklisted_numbers.txt: 18557384265 found verbatim