The use of a changing table is more about convenience for parents than a specific age requirement for babies. Typically, changing tables are most commonly used during a baby's first year, when nappy changes are frequent. However, many parents continue to use them into the toddler years, especially if the changing table is integrated with storage solutions for clothing or other essentials.
Once your child is potty-trained and no longer requires regular nappy changes, the need for a changing table diminishes. That said, the exact duration can vary based on individual needs and the design of the changing table, especially if it's convertible and can be repurposed for other uses.