Mashable: Several Instagram users have added codes like o22 and o45 to their profiles recently.

Social media sites are buzzing with a new trend of people updating their bios with letter and number combinations, the most common of which is 'o22'. While the meaning behind this code has been shrouded in mystery, it has now been revealed to be part of a wider Instagram Notes number trend that hints at the name of one's crush.

The code corresponds with the alphabet, where each letter is replaced by a specific number combination. 'o22' stands in for the letter 'A', while 'o33' represents 'M' and 'o45' is a code for 'J'. This suggests that anyone who uses the term 'o22' in their social media posts could be dating someone whose name begins with the letter 'A,' such as Adam, Alex, or Austin.

The fad has made it to TikTok, where users play a game in which others guess their name based on their code. This game has developed into the use of number codes for crushes, with lovers rushing to the video sharing platform to post their romantic updates and a snapshot of their code to their TikToks.

The trend has spread like wildfire, with social media users from all around the world participating and sharing their codes. It has become a fun and creative way for people to express their feelings and share their crushes with the world without revealing too much personal information.