Hong Kong phone number format
Hong Kong phone numbers use the country code +852. A mobile number looks like 5123 4567 inside Hong Kong and +852 5123 4567 from abroad. Mobiles have 8 digits after the country code, and the E.164 form is +85251234567.
Hong Kong number format at a glance
| Country calling code | +852 |
|---|---|
| International prefix (calling out of Hong Kong) | More than one; + works from any mobile |
| Trunk prefix (domestic dialling) | None |
| Mobile number length | 8 digits after +852 |
| Landline number length | 8 digits after +852 |
| Mobile vs landline from the digits | Yes, separate ranges |
Example Hong Kong phone numbers
These are the example numbers from Google’s libphonenumber data, the same numbering-plan data our validator uses, written three ways.
| Format | Mobile | Landline |
|---|---|---|
| National (inside Hong Kong) | 5123 4567 | 2123 4567 |
| International | +852 5123 4567 | +852 2123 4567 |
| E.164 | +85251234567 | +85221234567 |
How to write a Hong Kong number in E.164
- Remove spaces, dashes, dots and brackets so only digits are left.
- Hong Kong has no trunk prefix, so keep every digit of the national number.
- Put +852 in front. The result has 8 digits after the country code for a mobile.
So 5123 4567 becomes +85251234567. E.164 is the format SMS gateways, dialers and most CRMs store; see the E.164 format explained for why.
Mobile or landline?
Hong Kong allocates separate number ranges to mobiles and landlines, so a numbering-plan check reads the line type straight from the digits, for free. That type describes the range the number came from. It doesn’t prove the number is connected today.
Validate a list of Hong Kong numbers
Check a single number with the free phone number validator. For a whole file, upload the CSV to the verifier: every row gets a status, the E.164 number, the country and the line type, and emails in the same file get a live mailbox check. The Email + Phone plan ($49.99 a month) adds 5,000 live carrier lookups a month for the real line type and current carrier.
Common questions
- What is the country code for Hong Kong?
- The country calling code for Hong Kong is +852. When you call Hong Kong from abroad, dial your international prefix (or +) followed by 852 and the number.
- How many digits is a Hong Kong phone number?
- A Hong Kong mobile number has 8 digits after the country code +852, the same as a landline.
- How do I write a Hong Kong number in international format?
- Start with +852, then add the rest of the number. The mobile number 5123 4567 becomes +852 5123 4567, or +85251234567 in E.164, the form most CRMs and SMS tools expect.
- Can you tell if a Hong Kong number is a mobile?
- Usually, yes. Hong Kong numbers come from ranges allocated separately to mobiles and landlines, so a numbering-plan check reads the line type from the digits. It tells you what the range is for, not whether the number is in service.
That was one number. Your CRM export has thousands.
This tool checks one number at a time. Cleaning a list means every row in E.164, invalid numbers separated out, and the emails beside them checked too.
- Upload a CSV up to 100,000 rows with an email or phone column
- Every phone gets status, E.164 format, country and line type
- Emails in the same file get a real SMTP mailbox check
One plan, cancel anytime, no contract. The free tools stay free and unmetered either way — they are not a trial.