The LISTDS TSO command can be used to list information about a data set

For exmaple

LISTDS ('TS898908.PROGS.COBOL') STATUS
For non-VSAM data sets this can display information such as the type of data set , the logical record length and format, the volume it resides on etc.

If ran on a VSAM data set, only the data set organization information will be displayed

CATALOG parameter

This can be used when you need to see info about a data set that is being stored in a different catalog than the master catalog

HISTORY parameter

This will display the creation and expiration details for the selected data sets.
It will also display any password protection against them.

LABEL parameter

This will display the chain of DSCBs for the data set specified.
DSCB information is used to defined the data set on the VTOC

LEVEL parameter

This will select all data sets with the specified HLQ

MEMBERS parameter

This will display the information on the member data sets when ran against a PDS

STATUS parameter

This will display the associated ddnames and data set disposition