Do you ever think back to your first love from childhood and want to meet them again, but you only remember their name and phone number? Or perhaps a friend owes you money, but deliberately avoids your calls and has disappeared? Everyone has at least one person they want to reconnect with, but only have their name and phone number as a clue. How can you find someone's address in such situations? Is it possible to search for an address with just a name? Can the household registration office search for addresses in any situation? Follow this guide to learn the ins and outs of address searching and discover 3 major resources and methods for finding someone's address.
Table of Contents
- Can the general public use a name to search for an address at the household registration office?
- How to search for an address using a landline? Understand the logic behind phone number arrangement.
- Searching for an address using neighborhood information.
- Private Investigation Agency Address Search Service: Phone and Name Address Search is Possible
- You Don’t Have to Do It Yourself, Let Reliable Private Investigators Handle It
Can the general public use a name to search for an address at the household registration office?
When people think about finding an address, the first place that comes to mind is usually the household registration office. However, using a name to search for an address at the household registration office has certain limitations. Generally, if there is a legal relationship between the parties, you can use public resources to find someone. For example, if you are involved in a traffic accident and the other party flees the scene, you can ask the police for help, review the surveillance footage to get their car number, and then use the vehicle registration to find basic details like their name and address.
If the situation involves debt collection, it falls under civil disputes, and public agencies are not obligated to search for personal data. In such cases, you must have the basic information (such as the ID number or the address where legal documents can be served) before filing a lawsuit. If this information is unavailable, the court cannot assist in handling the debt case.
As seen from the example above, searching for an address via public agencies is not only legally regulated but also involves a complicated and tedious process, making it difficult to obtain an address through the household registration office. Therefore, we have compiled 3 resources that can help you find an address.
How to search for an address using a landline? Understand the logic behind phone number arrangement.
If you are not using a private investigation agency, a common method is to analyze the "landline phone number" arrangement logic to infer the address. The arrangement of phone numbers in Taiwan starts with a "0" followed by the area code of each city or district (for example, Taichung City's area code is "4," so the phone number will start with "04"). Below are the area codes for Taiwan's cities and counties:
- 02: Taipei, New Taipei, Keelung
- 04: Taichung, Changhua
- 07: Kaohsiung
- 03: Taoyuan, Yilan, Hualien
- 037: Miaoli
- 049: Nantou
- 05: Yunlin, Chiayi City, Chiayi County
- 08: Pingtung
- 089: Taitung
- 069: Penghu
- 082: Kinmen
- 0836: Lienchiang
In addition, you can use the area code after the "0" to narrow down the general location of the call. For example, a number starting with "0221" indicates that the phone call is likely from the Zhongshan District of Taipei.
You can also use physical telephone directories, which are still available for sale. These thick yellow pages list telephone numbers for businesses, residences, and even hotels across different regions. For example, if you receive a call from a number like "0425XXXXX," you can look it up in the directory to learn that the number is likely from Taichung's Fengyuan District or surrounding areas.
Additionally, apps like "Whoscall" can quickly tell you the registered business behind the call.
Searching for an address using neighborhood information.
Besides phone numbers, you can also use neighborhood information systems to search for street addresses, changes in street names, and postal codes. Below are some resources for neighborhood address queries:
- Taipei City Government Civil Affairs Bureau Address Query System
- Ministry of the Interior Household Registration Office Village/Street Address Query
- New Taipei City Geographic Information System
- Taoyuan City Neighborhood Address Query
- Zhongli District Neighborhood Address Query
- Taichung City Neighborhood Address Query
Private Investigation Agency Address Search Service: Phone and Name Address Search is Possible
If you have tried the above two methods and still cannot find the address, it is recommended to seek the help of a private investigation agency. Although address search services from private investigators come with a fee, they can access many routes to help you find the needed information. Below is a list of the information needed for address searches:
| Item | Information That Can Be Retrieved | Information Required to Provide | Processing Time | Fee |
| Landline Number to Address | Address registered under the target’s landline number | Target’s landline number | 1–2 days | Special quote |
| Mobile Number to Address | Address registered under the target’s mobile number | Target’s mobile number | 1–2 days | Special quote |
| License Plate to Address | Address registered under the target’s vehicle registration | Target’s license plate number | 1–2 days | Special quote |
| Personal Household Register | Target’s household registration details | Target’s name, ID number, date of birth | 1–2 days | Special quote |
You Don’t Have to Do It Yourself, Let Reliable Private Investigators Handle It
In daily life, we often encounter situations where we cannot find someone—whether it’s an old classmate, teacher, colleague, or a habitual debtor who avoids paying back. Trying to find someone's address on your own can be difficult. In such cases, turning to a professional investigation agency with extensive experience and resources can save you time and effort.
With 40 years of experience, Yitong Private Investigation Agency guarantees to help you find the person you're looking for. In addition to address searches, we also provide services for locating people, tracking personal movements, and various other investigations. If you need assistance, feel free to contact us.
