@Cow A normalized version,
{{'18665426830', '8665426830'}}
, of that pattern is already on the number blacklist. You can use
!!/bisect-number 18665426830
to determine which entries on the number lists match that pattern, which would tell you: Matched by
+1-866-542-6830
on
line 3709 of blacklisted_numbers.txt: 18665426830 found normalized