This free Hong Kong phone number checker shows whether a number is valid.
A Hong Kong phone number checker tells you whether a number is real, which means it follows Hong Kong's numbering rules and is assigned. Enter a +852 number above and 1Lookup's free checker returns valid or invalid in seconds, with the line type and country, checked against Hong Kong's numbering plan.
Pick the country, then enter the number without the country code.
Free & rate-limited. No signup required to try.
- Country code
- +852
- Mobile numbers
- 8 digits after +852, starting 5, 6 or 9
- Landlines
- 8 digits after +852, starting 2 or 3, such as +852Â 2XXXÂ XXXX
- Written at home
- 5123 4567
- Written for apps and SMS
- +85251234567
- Dialed from the US
- 011 852 5123 4567
A Hong Kong mobile number is +852 followed by 8 digits, and the first one is 5, 6 or 9.
Written with the country code
- +852Country code
- 5Mobile start
- 123 45677 more digits
The +852 comes before the number and is dropped when you dial inside Hong Kong.
A Hong Kong phone number checker reads a number's format first and then checks it against Hong Kong's numbering plan.
This is the path one check takes. A number can be written correctly and still not be assigned to anyone, so the format check alone is not the answer.
- You enter the numberType it the way it is written at home, such as 5123 4567, or paste it with +852.
- Its format is checkedEach type of number has its own rules. A mobile needs 8 digits after +852 and starts with 5, 6 or 9 at home.
- It is checked against the numbering planNumbers outside the US and Canada are checked against the numbering plan of their country, which for this page is Hong Kong's.Nothing is sent to the number, so it never rings and its owner is never told.
- You see valid or invalidWith the line type and country in a few seconds, and the carrier or network where one is listed.
A Hong Kong mobile number has 8 digits after +852 and starts with 5, 6 or 9, so any other length is not a valid mobile.
These lengths come from the numbering data for Hong Kong. Hong Kong has no area codes and no leading 0, so a number reads the same at home and abroad. A few smaller mobile ranges start with 4, 7 or 8.
| Number type | Starts with at home | Digits after +852 | Written at home |
|---|---|---|---|
| Mobile | 5, 6 or 9 | 8 | 5123 4567 |
| Landline | 2 or 3 | 8 | 2XXX XXXX |
Three common mistakes make a Hong Kong number fail the check, and each one is quick to fix.
Repeating +852 adds digits.
Write +852 5123 4567 once, with the country code at the front.
Typing too few or too many digits makes a number invalid.
A mobile number has 8 digits after +852. With 7 or 9 it cannot be a valid mobile, so look for a missing or doubled digit.
Leaving the wrong country selected changes how the number is read.
The checker reads a number by the rules of the country selected above, so keep Hong Kong selected for a +852 number. Paste a number with its + and country code and the country is read from the number itself.
These are the questions people ask most about checking Hong Kong phone numbers.
How do I check if a Hong Kong phone number is valid?
Enter the number in the box above with Hong Kong selected. The free checker returns valid or invalid in seconds, with the line type and country. Type it the way it is written at home, such as 5123 4567, or in full as +852 5123 4567.
How many digits is a Hong Kong phone number?
A mobile number has 8 digits after +852. A landline has 8 digits after +852, such as +852 2XXX XXXX.
What does a Hong Kong mobile number start with?
Mobile numbers start with 5, 6 or 9 at home, which is 5, 6 or 9 after +852.
How do I write a Hong Kong number for an app or an SMS tool?
Use the E.164 form: a plus sign, 852, then the number and no spaces, such as +85251234567.
Does the Hong Kong phone number checker show the carrier?
It shows the carrier or network where one is listed. Numbers outside the US and Canada are checked against the numbering plan of their country rather than live carrier data, so some come back with no carrier name.
Does valid mean the Hong Kong number is active?
No. Valid means the number is real, correctly written for Hong Kong and assigned. Whether a line is switched on and reachable right now is a different question, and the free HLR lookup answers it.
Can I check a whole list of Hong Kong phone numbers?
Yes. This free tool checks one number at a time. A 7-day free trial opens CSV upload and the API, at 1 credit a number.
Does the person know I checked their number?
No. The check reads records only. No call or text goes to the number, so its owner is never told.
You can check numbers from other countries on their own pages.
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These free tools answer the next question about a number.
- The +852 country code pageHow to dial Hong Kong, the time there now and the landline places.
- HLR lookupCheck whether a mobile number is switched on and reachable right now.
- Line type lookupSee whether a number is a mobile, a landline or VoIP.
- Carrier lookupFind the carrier or network behind a number.
- Phone validator for any countryThe same check with the country picker open to every country.
- Phone validation APIRun the same check from your own software, one request per number.
Sources: Google's libphonenumber numbering data for lengths, mobile starts and landline starts, as of September 24, 2026; the ITU list of country codes.