You are exploring Japan's area codes, dialing codes, and how to make phone calls from Japan to Vietnam. Read this article to get the most detailed information.
Japan Area Code
An area code is a string of numbers used to identify a specific geographical area within the mobile or landline phone network system of a country. Phone area codes are typically used to determine how to identify a phone number and guide the call connection process.
Each geographical area is associated with a unique area code, which you input into your phone when making a call. Below are some area codes for Japan:
Note: Phone area codes may change over time due to the development of telephone services and population changes. Additionally, as demand increases, new area codes may be added to accommodate it.
Japan's area codes
How to Check Japanese Phone Numbers
In Japan, the phone number system is organized into groups such as mobile, landline, and special numbers. Area codes can range from one to five digits, depending on the area. When purchasing a new SIM card, it's often necessary to know the phone number, which is typically obtained by calling a relative. Below, Hallo will guide you on how to check without needing to call someone.
To check the phone number currently in use, here's how:
Checking Docomo SIM Numbers
Checking Softbank SIM Numbers
Checking Rakuten Mobile Numbers
This can apply to all three carriers above:
Method 1: Checking on the Phone
Step 1: Go to the settings on your phone and select "Phone."
Step 2: Your phone will display your number under "My Number."
Method 2: Checking on the SIM Card
Information about the phone number is often stored on the SIM card. You can remove the SIM card from your phone and check the printed information on the card to see your phone number.
Method 3: Checking on Phone Bills or Online Accounts
If you use fixed-line or mobile phone services, information about the phone number typically appears on your phone bill or in your online account.
Method 4: Dialing Codes on the Dialer (only for Docomo SIMs)
You can open the dialer and press the following codes: 1112#, 555#, 5550#, 7770#, 1310#, and follow the instructions on the screen.
How to Make Phone Calls from Japan to Vietnam, and Vice Versa
Calling from Vietnam to Japan
To call from Vietnam to Japan, follow this format:
00 - 81 - Japanese city code - phone number
Where:
00 is the international dialing code
81 is the Japanese telephone code
For example, if you have a relative working in Hiroshima, Japan, with the phone number 123, you would dial as follows: 00-81-82-123.
Calling from Japan to Vietnam
To call from Japan to Vietnam, use the following format:
00-84-Vietnamese city code - phone number
Note: If the number you are calling is a mobile phone number, the dialing format is 00 - country code - phone number.
Illustrated Guide for Making Calls
Hallo has provided you with information on how to make calls from Japan to Vietnam and vice versa. If you're looking for a reputable place to buy a SIM card, you can visit Hallo's website at Hallo.co to choose a SIM card that suits you!
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