Hanoi Postal Code System: Complete Guide for 2026
Hanoi's postal code system has undergone significant updates in 2026, reflecting the city's growing infrastructure and administrative needs. As Vietnam's capital continues to expand, understanding the correct postal codes is essential for efficient mail delivery and business operations.
Current Postal Code Structure
As of 2026, Hanoi uses a six-digit postal code system, with the general postal code for the city being 100000. The postal codes across Hanoi's districts range from 100000 to 140000, with each district having its own specific code for more precise mail routing.
District-Specific Postal Codes
Here are the postal codes for major Hanoi districts:
- Tay Ho: 124000
- Hoang Mai: 128100
- Long Bien: 120000
- Dong Anh: 136000
- Ba Dinh: 100000
- Hoan Kiem: 100000
- Hai Ba Trung: 100000
Implementation of New System
The transition to the six-digit system was implemented gradually throughout 2025 and became fully operational by early 2026. This change aligns with Vietnam's modernization of its postal infrastructure to improve delivery efficiency and accommodate the growing number of addresses in the capital.
Address Format Requirements
As of July 2025, the standard Vietnamese address format requires the following structure: [House Number + Street], [Ward/Commune], [City/Province], [Postal Code]
This standardized format ensures consistency and accuracy in mail delivery across Vietnam.
Practical Applications
For businesses and residents, using the correct postal code is crucial for:
- E-commerce deliveries
- Official correspondence
- Banking and financial transactions
- Government services
The postal code system serves as a vital component of Vietnam's digital transformation, enabling more efficient logistics and communication networks in the rapidly developing capital city.
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