Check the person’s social media profiles for contact details
Search the phone number in search engines with the person’s name
Look up the number in public directories and reverse phone lookup services
Review the person’s business website or personal website
Check messaging apps where the number may be linked to an email profile
Search professional networking sites such as LinkedIn
Use email-finder tools that accept a phone number as a starting point
Check data broker sites that may associate phone numbers with emails
Ask the person directly for their email address
Contact them through the phone number and request their email
Search public records or company directories if the number is work-related
Verify any found email address through a legitimate confirmation method