E.164 Format Phone Numbers

E.164 is an international standard that defines a numbering system for the worldwide Public Switched Telephone Network (PSTN) and some other data networks. It ensures that phone numbers are globally unique by by following its general format.

E.164 numbers are formatted [+] [country code] [area code and subscriber number] and can have a maximum of fifteen digits.

For example: 

*https://www.twilio.com/docs/glossary/what-e164 

On Remarkety, your contacts’ SMS phone numbers must be written in the E.164 format in order to send properly. 

To make sure your phone numbers are following E.164 protocol, on Microsoft Excel: 

1. Highlight the column of phone numbers.
2. Under the Home tab, select Format and open Format Cells.
3. Choose a Custom Category
4. Inside the “Type” field, type “+# ?/?” and Hit Enter.
   
   
   
   
5. You should redirect your worksheet with the column updated in the format. 

For example, in this situation, 442077056000 will be converted to +442077056000.

To learn more about uploading contact information via CSV, read here. 

If you have any further questions on formatting your SMS phone numbers, reach out to us at support@remarkety.com.