Jim, AutoFilter dropdown list will only show 1000 entries.
Have a look here for details

http://www.contextures.com/xlautofilter02.html#Limits
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Paul B
Always backup your data before trying something new
Please post any response to the newsgroups so others can benefit from it
Feedback on answers is always appreciated!
Using Excel 2002 & 2003

"Jim Willy" <Jim wrote in message
...
I have a spreadsheet with client information in approx 3900 rows. Using
auto
filter to scroll through alphabetized last name field, the data ends part
way
through alphabet. Deleting that row, or a group of rows surrounding that
one,
doesn't change the result, it always stops at the same line number. This
is a
recent problem, it worked fine for two years!