Hong Kong Voice Features and Restrictions

International reach:

• Calls from International numbers are supported.

Domestic reach:

• Domestic Vonage numbers must only be used to place calls via Vonage Voice API.
• Domestic calls from non-Vonage numbers are best effort only. However, number port-in is possible for Hong Kong numbers. Please contact your account manager if you would like to port your non-Vonage number to us.
• The self-service buying of numbers is not available for Hong Kong at this time on Vonage's Customer Dashboard. Customers can still request a new number from Customer Dashboard by filling in and submitting the required information or by contacting their Account Manager to start the order. After the request is reviewed and there is no issue, the new number will be reserved for customer.
• Outbound calls from Toll Free numbers are not supported.

As regulatory obligations, the Hong Kong Regulator requires carriers in Hong Kong to overwrite the calling party CLI for all international inbound fixed calls to Hong Kong, and supersede the CLI by an identifier to enable inter-operator interconnection charging. The terminating carrier in Hong Kong will not be display this identifier to called party, depending on the customer equipment, the call may display as “international call”, “unidentified caller”, etc and no CLI displayed on the device.

No other limitations apart from Local CLI or Invalid CLIs as explained in In-Country, Local, or No-CLI Calls Rejected