# Check CDR

Class 4 provides a very comprehensive filter for you to look up CDRs that you are looking for.  To search for CDRs, you go to Statistics > CDR Lists:

![](/files/-MYWxX54NzoOFuXikIz2)

Then, you can see all the search criteria:

![](/files/-MYWxdRXQVJlYt0UdEKl)

Class 4 gives you complete set of fields to view your CDRs:

![](/files/-MYWxlBERXjsVsMqMp8K)

If you are search for CDRs within a long period of time, it may take a while.  Class 4 let you run your CDR search job in the background by selecting "Excel CSV" option.

![](/files/-MYWy4jfiatgeYRoEWQf)

When this option is selected, your CDR download will be available in the Export tag when ready:

![](/files/-MYWyHuuwHPLji4e6qom)


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