Get current AUTO_INCREMENT value for any table
You can get all of the table data by using this query:
SHOW TABLE STATUS FROM `DatabaseName` WHERE `name` LIKE 'TableName' ;
You can get exactly this information by using this query:
SELECT `AUTO_INCREMENT`
FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_SCHEMA = 'DatabaseName'
AND TABLE_NAME = 'TableName';
If you just want to know the number, rather than get it in a query then you can use:
SHOW CREATE TABLE tablename;
You should see the auto_increment at the bottom