SQL> select ts# , name from v$tablespace;

       TS# NAME
---------- ------------------------------
         0 SYSTEM
         1 UNDOTBS1
         2 SYSAUX
         4 USERS
         3 TEMP
         6 EXAMPLE

6 rows selected.

SQL> select * from v$version;

BANNER
----------------------------------------------------------------
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Prod
PL/SQL Release 10.2.0.1.0 - Production
CORE    10.2.0.1.0      Production
TNS for Linux: Version 10.2.0.1.0 - Production
NLSRTL Version 10.2.0.1.0 - Production

SQL> select initial_extent,min_extents,max_extents from dba_tablespaces where tablespace_name='USERS';

INITIAL_EXTENT MIN_EXTENTS MAX_EXTENTS
-------------- ----------- -----------
         65536           1  2147483645

SQL> select pct_increase, next_extent from dba_tablespaces where tablespace_name='USERS';

PCT_INCREASE  NEXT_EXTENT
------------  -----------