The LISTCAT command has no required parameters.

When the LISTCAT command is entered as a job step (that is, not through TSO/E) and no parameters are specified, an entire catalog is listed. See Catalog Search Order for LISTCAT for a description of how the catalog to be listed is selected.

Catalog management does not maintain the statistics of a catalog's own cluster entry. While LISTCAT will record statistics for data sets defined into a catalog, most of the statistics for the catalog's own entries are not accurately recorded.

Volume High Used RBA statistics do not apply for mutli-striped VSAM data sets. For multi-stripe VSAM data sets, the index component is not striped across volumes. The index component primary space is only obtained on the first volume as non-guaranteed space.

LISTCAT LEVEL(TSO/E user prefix) 

For RACF® users, in a non-SMS environment, LISTCAT checks the authorization at the catalog level before checking the authorization at the data set level. For a SMS environment, LISTCAT checks the authorization at the data set level before checking the authorization at the catalog level.