Yes, you can have an many sender IDs as you like in one account or copy them in different accounts. Buy it once, use it forever.
+ When I send SMS, will my mobile number be shown?
+ I did not receive signup OTP, what should I do?
+ How can I get official quotation?
+ How to add OTP messages to my App or website?
+ I want to advertise my business/product, do you provide lists?