# Revision history [back]

### Why is ip.tos.precedence empty?

Hello,

I have created a new column with:

Type: Custom
Fields: ip.tos.precedence


However, this column is always empty. What I would expect is to find the three leftmost bits of the ip.dsfield field there, but as I said it is empty for all packets. I have created a column with ip.dsfield and it does show values.

Am I missing anything?

Thanks, Fran