The share registry will send you a holding or dividend statement that may look something like this. You'll normally find the share registry's details in the top-right corner. Go to the company's website and search for an Investor Relations section. The share registry will be shown there.
There are usually fewer than 100 companies on the dividend aristocrats list at any given time. At the start of 2024, there were close to 70 companies on the S&P 500 dividend aristocrats list, and 55 dividend kings.