Why Hong Kong's postal code is 999077 — and what to write instead
Hong Kong does not use postal codes. There is no numbering system for districts, no equivalent of a ZIP code, and Hongkong Post sorts mail by the written address alone. The number 999077 you see in drop-down menus is not a Hong Kong code — it is a convention imported from mainland systems.
1What Hongkong Post actually uses
Mail in Hong Kong is sorted mechanically by the address as written, then manually by district and building. There is no postcode field in the system, which is why the official position is simple: no postal code is required.
This works because Hong Kong addresses are unusually precise — building name, block, floor, flat number and street — and because the territory is small. A correctly written address is enough.
2Where 999077 comes from
999077 is a placeholder used by some mainland Chinese systems to fill a mandatory postal code field for Hong Kong. It is not assigned by Hongkong Post, it does not correspond to any district, and no sorting decision in Hong Kong depends on it.
It is also not the only number in circulation — 000000, 999078 and the dialling code 852 all appear in online forms, none of them official.
3What to write in a form that insists
| Situation | What to enter |
|---|---|
| International form with an optional postal code field | Leave it blank |
| Field is mandatory and rejects letters | 999077 or 000000 — either is accepted; neither affects delivery |
| Parcel from mainland China (Taobao, JD, consolidators) | Use the code the platform's Hong Kong warehouse address specifies — usually 999077 |
| Local Hong Kong mail | Nothing. There is no code to write. |
For cross-border e-commerce the number matters for the platform's own routing, not for Hongkong Post. Use whatever the warehouse address block gives you, exactly as given.
4What actually delays a parcel
- A missing flat or floor number. The single most common cause of failed delivery in Hong Kong.
- A building name without the street. Many buildings share names across districts.
- Writing "Hong Kong" as the city but omitting the district. Districts matter for sorting.
- Using a residential address for a carrier that only delivers to business addresses, or vice versa.
Spending thirty seconds on the address format is worth more than any postal code. Our guide to writing a Hong Kong address covers the order and the common mistakes.
Quick answers
What is the postal code for Hong Kong?
There is none. Hong Kong does not operate a postal code system, and Hongkong Post does not require one.
Is 999077 an official Hong Kong postal code?
No. It is a placeholder used by some mainland systems for mandatory postal code fields. It has no official status in Hong Kong and does not affect sorting.
What should I put in a mandatory postal code field?
999077 or 000000 are both commonly accepted by forms. Delivery depends on the street address, not the code.
Is 852 a postal code?
No. 852 is Hong Kong's international dialling code.
Do online shops ship to Hong Kong without a postal code?
Yes. Most international carriers deliver to Hong Kong using the written address alone. For mainland platforms, use the code supplied with their Hong Kong consolidation address.
Sources: Hongkong Post — postal code enquiry · Hongkong Post — address format guidance. Last checked 28 October 2026; operators and government departments can change fares and arrangements at any time.