Complete guide to filling out Australian postal codes: a must-read guide to avoid address errors!

Hello everyone, I am the assistant of Australian Encyclopedia. Recently, some friends have consulted me about **Filling in Australian postal codes**. Now I will summarize the relevant issues and hope it will be helpful to those friends who want to know.

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### 1. The basics of Australian postal codes
Australia's postal code (Postcode) consists of 4 digits and is an important basis for the accurate delivery of the postal system. Its arrangement rules are based on geographical areas:
- **The first digit represents the state/territory** (e.g. 2 for New South Wales, 3 for Victoria)
- **Subsequent figures are broken down to specific suburbs** (e.g. Sydney CBD postcode is 2000, Melbourne CBD is 3000)
- **Special postal codes**: 0800-0999 series are used for corporate mailboxes, 0000-0999 are reserved for government agencies

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### 2. 4 ways to find Australia’s postal code
1. **Australia Post official website query** ([postcode.com.au](https://www.postcode.com.au))
2. **Google Maps search**: Enter "address + postcode" to display directly
3. **Community Post Office Enquiry**: There are more than 4,000 post offices across Australia for on-site consultation
4. **Telephone enquiry hotline**: 13 13 18 (calls from within Australia)

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### 3. Practical examples of filling in scenarios
#### Scenario 1: Fill in the online shopping address
```Markdown
Recipient: Zhang San
Address: Level 5, 123 Queen Street
City: Melbourne
State: VIC
Zip code: 3000
```

#### Scenario 2: Visa application form
```Markdown
Address Line 1: Suite 8, 456 George St
Address Line 2: [Leave blank if no address is available]
Suburb/Town: Sydney
State: NSW
Postcode: 2000
```

#### Scenario 3: International Express Delivery
```Markdown
Country: Australia
Postal Code: 6000 (Perth city centre)
Address: 78 St Georges Terrace
```

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### 4. Notes on filling in the form (must read!)
1. **Number of digits**: 4 digits are required, with zeros added if the digits are less than 4 digits (e.g. the postal code of the University of Adelaide in South Australia is 5000)
2. **Format Specification**:
- Write on a separate line: Postcode: XXXX
- Address line: Add ", NSW 2000" at the end
3. **Common Mistakes**:
- Obfuscated telephone area code (Sydney area code 02 ≠ postal code)
- Use abbreviations (correct: NSW 2000; incorrect: Syd 2000)
- The address is out of order (house number should be written before street name)

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5 common questions about Australian postcodes

#### 1. What should I do if I forget my zip code?
- Use Australia Post's postcode map tool
- Reverse search by Suburb (e.g. enter "Parramatta NSW" and it will automatically show 2150)
- Call Post Office Customer Service on 13 76 78

#### 2. Comparison table of the first digits of different states
| State/Territory| Postcode Range| Example City |
|---------|----------|----------|
| New South Wales | 2000-2999 | Sydney (2000) |
| Victoria | 3000-3999 | Melbourne (3000) |
| Queensland | 4000-4999 | Brisbane (4000) |
| Western Australia | 6000-6999 | Perth (6000) |
| South Australia | 5000-5999 | Adelaide (5000) |

#### 3. Is it necessary to add a country code for international mailing?
- Mailing from China to Australia requires marking: AU+postal code (e.g. AU 2000)
- If you are shipping from Australia, you only need to enter the 4-digit postal code

#### 4. Special circumstances for business addresses
- Postal codes for large companies: such as Sydney Opera House’s exclusive postal code 2000
- PO Box: PO Box 123, Sydney NSW 2001

#### 5. How to deal with postal code changes?
- Log in to the [Postal Address Change System](https://moversguide.com.au) to declare online
- Post offices provide free address update services (ID required)

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### Summary
Correctly filling in the Australian postal code is related to mail delivery, document processing, online shopping delivery and other aspects. Remember these three key points: **4-digit numbers should not be abbreviated, address order should be aligned, and state abbreviations should be standardized**. It is recommended to save the postal code query tool link in this article and check it at any time when you encounter an uncertain address.

Thank you for reading this article. I hope this article can help you fully understand the **Australian postal code filling**. If you are applying for an Australian visa, preparing to study abroad, or handling cross-border packages, please follow us for more practical guides! (Note: The data in this article is updated to July 2023. The specific information is subject to the Australia Post official website)