Often prefixed with a generic tag (e.g., "Techno Bipu") to keep marketing leads distinct from personal contacts.

Must include country codes for WhatsApp to recognize them correctly. Typical Workflow Export iPhone Contacts to Excel - Step by Step Tutorial

They are typically shared as .xlsx (Excel) or .csv files, which are standard formats for data tables that can be converted into .vcf (vCard) files for mobile import.

A standard list usually includes columns for:

These files allow for the rapid addition of hundreds or thousands of contacts into a phonebook at once, primarily for use in WhatsApp broadcast lists or marketing campaigns.