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Short Code Regulation
Guidelines
Short codes (generally 5 - 6 digits) allow direct customer communication through SMS. Using short codes results in higher message volumes, within shorter time periods, than long-code or toll-free numbers.
Both Calilio and its customers must follow local phone number regulations when transferring numbers between service providers. To support compliance and reduce the risk of service disruption, we provide a country-by-country guide to phone number porting requirements.
Local regulations may require identity verification, proof of number ownership, or business documentation before a carrier can approve a porting request. To avoid delays or urgent escalations, please provide complete and accurate information for the selected country and number type.
Frequently asked questions
What is a business phone service?
A business phone service is a communication solution that delivers Voice over Internet Protocol technology for voice communication over the Internet. Calilio offers a robust and reliable VoIP service that elevates business communications.

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