
Assuming countif is required, the following 2 results were found.
one because if you copy the formula down, it may automatically modify the range. So the formula in the first row will be =COUNTIF(A2:A100, B2) but the formula in the second row will be =COUNTIF(A3:A101, B3): =COUNTIF(A2:A100, B2) -- Returns 1 if value...
a fair few solutions that didn't work and then found this hidden away in a forum: Quick Count =INT(SUMPRODUCT((A3:A1000"")/COUNTIF(A3:A1000,A3:A1000&""))) This returns the number of unique values in the range A3 to A1000 and excludes the blank/empty...

 bc1qf6elrdxc968h0k673l2djc9wrpazhqtxw8qqp4
bc1qf6elrdxc968h0k673l2djc9wrpazhqtxw8qqp4
 0xb038962F3809b425D661EF5D22294Cf45E02FebF
0xb038962F3809b425D661EF5D22294Cf45E02FebF