IDD (International Direct Dialing) lets you call other countries directly from Hong Kong. You dial an IDD prefix (such as 0060, 001 or 0030) before the destination's country code and number. Charges are usually per minute and vary by where you call — each country has its own per-minute rate.
For trading firms, importers/exporters and cross-border businesses that regularly call overseas suppliers, factories, customers or branch offices.
Same product, different names.
Each carrier brands this differently — here’s how to recognise it when you compare quotes.
The honest pros and cons.
Benefits
- Call anywhere in the world straight from your office phone or mobile — no extra equipment.
- Transparent per-minute pricing by destination, with published rates for common countries.
- Most providers offer discount bundles or cheaper IDD codes for popular destinations like Mainland China and Southeast Asia.
- Can be registered on a mobile from any Hong Kong network — handy for staff on the move.
Watch-outs
- Calls to remote or less-common countries can be pricey — check the per-minute rate for that destination first.
- Different IDD prefixes (e.g. 0060 vs 001) can differ in quality and price — pick the right code.
- If your international volume is high, pure per-minute IDD can cost more than a SIP trunk or VoIP route.
Indicative pricing: charged per minute by destination — popular routes (e.g. Mainland China) can be as low as a few cents to around HK$1 per minute, while remote countries cost far more. Some plans bundle minutes for a monthly fee. Always check the provider's latest IDD rate table.
Common questions
Q01How do I know the per-minute rate to a particular country?
Q02My international call volume is high — is there a cheaper way?
You might also need
SIP Trunk
Keep your existing phone box, run calls over the internet, cut line and IDD costs
Learn more 02Business Phone Line / IP Phone Line
A dedicated fixed phone number for your business — simple, reliable calling
Learn more 03Cloud PBX Phone System
Your office switchboard in the cloud — no physical phone box needed
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