What are the most common four-digit numbers?

The most common four-digit numbers typically include those that are easy to remember or have significant cultural meanings, such as 1111, 1234, 0000, and 9999. These numbers are often chosen for their simplicity or patterns, making them popular in contexts like passWords or codes. Additionally, numbers like 2020 or 2021 have also gained popularity due to their association with recent years.