E.164 is an international standard developed by the International Telecommunication Union (ITU) that defines the format of telephone numbers for the global Public Switched Telephone Network (PSTN) and other data transmission networks.
In the international E.164 format, any leading zeros are removed, and all spaces, dashes, and parentheses are excluded.
By following the recommendations of E.164, you will ensure reliable and efficient communication with customers around the world.
Maximum Length
15 digits
Country Code (CC)
One to three digits identifying the country
National Destination Code (NDC)
Code defining the geographic area, telecommunications operator, or type of service within the country
Subscriber Number (SN)
Unique number assigned to a specific subscriber
Local mobile number
91234567
Country Code
+65
E.164 format
+6591234567
Universality
A single format for all countries, ensuring compatibility between different networks and operators
Accuracy
Reduces the likelihood of errors in call routing and message delivery
Convenience
Simplifies the processing and storage of phone numbers in information systems