another way:

=IF(ISERROR(MATCH(LEFT(B1,11),$A$1:$A$1313,)),""," match")

then use autofilter if need be

On 6 Mar, 07:02, gcotterl wrote:
COL A has 1,313 cells whose contents look like this:

107211009-1
114650003-4
122413021-6

COL B has 987,601 cells whose contents look like this:

008100465-2 *01 * * * * 58.86
008100465-2 *02 * * * * 58.86
008100493-7 *01 * * * * 16.12

How do I find the cell(s) in COL B whose eleven left-most characters
match the contents in the cells in COL A?