asterisk users - Mar 2013 - CDR-Logging with leading "0" in src field clid and/or src

Hi,

I am using Asterisk 11.2.1. I am logging CDRs to a mysql database (via 
odbc). The table contains the fields clid and src. Both fields are 
varchar(100). But alls entries are without the leading "0". For
example
0211 for Germany-D?sseldorf.

Where can I configure that behaviour, please?

-Thorsten-