Sign Up issue: phone number is already associated with a Vercel account

I’m signing up with my work email but when adding my phone number I’m getting rejected because it is already used (on my personal account), how can I unlink my phone number to my personal account so I can use it for my work signup? The thing is I don’t know which account is linked with my phone number.

Message:

  • This phone number is already associated with a Vercel account