To create a new subaccount, make an HTTP POST request to your Accounts list resource URI:

https://api.twilio.com/2010-04-01/Accounts.json

You are required to provide the FriendlyName Account property as the name of the subaccount. The FriendlyName property is useful for organizing accounts and linking them back to information in your system.

⚠️ Important :

A main account can only have up to 1000 subaccounts by default. To get more subaccount contact support.

Trial accounts only get one subaccount.