How to dial it
This number does not connect from overseas; the dial strings below only work inside Japan.
Standard formats
- E.164 (international standard)
- As written in Japan
- International format
Free tool · Verified 2026-09-17
Japan Phone Number Checker
Paste a Japanese number and see what kind it is, how to dial it from the US or Taiwan, whether it can be reached from overseas at all, and how to say it out loud in Japanese. No app, no signup, no server round trip — and every rule links back to the official page it came from.
Sources: Japan's MIC designation status (1 Sep 2026), the MIC numbering Q&A, the MIC area-code list (1 Mar 2026), and NTT Communications' official FAQ pages for 0120 and 0570.
This page is also available in Traditional Chinese: 日本電話號碼查詢與撥打工具
Check a number
One number at a time. When the tool cannot identify a number it says so and points you at the official list instead of guessing.
Paste a number above and this area shows the number type, whether it works from overseas, the dial strings, the standard formats and the Japanese reading.
We cannot identify this number. Check the length and the first digit: Japanese landlines are 10 digits and mobile numbers on 070, 080 or 090 are 11 digits, and both start with 0 (behind the +81 country code the leading 0 is dropped). If the number came from a business card or a website, include the area code. The format table and the MIC area-code list can help you confirm it.
Verified 2026-09-17. This tool does not place calls, charges nothing and cannot promise that a number will answer. Always confirm against the official pages before you rely on a result.
Japanese number formats at a glance
Japan splits its numbers into 0A0 bands (mobile, IP phone), 0AB0 bands (free-dial, navi-dial and other service numbers) and 0ABC landlines. Area codes are 1 to 5 digits long (03, 011, 0466, 04992, 09802 all exist), so where the hyphen goes changes from city to city — a Tokyo number is 03-1234-5678 while Fujisawa is 0466-12-3456.
| Type | Length and format | Example | From overseas |
|---|---|---|---|
| Landline | 10 digits: 0 + area code (1–5 digits) + exchange + 4-digit subscriber number | 03-1234-5678 · 0466-12-3456 · 011-123-4567 | Yes |
| Mobile (070 / 080 / 090) | 11 digits | 090-1234-5678 | Yes (callee can block it) |
| 060 (assigned, not yet live) | 11 digits | 060-1234-5678 | No service yet |
| IP phone (050) | 11 digits: 050 + 4 + 4 | 050-1234-5678 | Depends on provider |
| Free-dial (0120) | 10 digits: 0120 + 3 + 3 | 0120-123-456 | No (operator FAQ) |
| Free-dial (0800) | 11 digits: 0800 + 3 + 4 | 0800-123-4567 | Not stated — ask the service |
| Navi-dial (0570) | 10 digits: 0570 + 3 + 3 | 0570-123-456 | No (operator FAQ) |
| 0180 (テレドーム) | 10 digits | 0180-123-456 | Depends |
| 0990 (information-fee) | 10 digits | 0990-123-456 | Not stated — ask the service |
| 020 / 0200 (M2M) | 11 digits / 14 digits | 020-123-45678 | Not a voice number |
| 0204 (paging) | 11 digits | 0204-123-4567 | Not a voice number |
The MIC designation page lists 0180 (テレドーム) as 指定なし — no numbers are currently designated in that band — so the checker answers “depends” rather than “no”. The MIC area-code list also notes that some 0ab0-style bands share their first digits with real area codes (04 and 047, for example), which is why the checker matches on the full prefix and honours the way you grouped the number.
Why 0120 and 0570 numbers fail from overseas
Both bands are domestic-only. The caller pays nothing (or less) and the business receiving the call covers the difference, so the operators do not open them to inbound international traffic. It is not a setting on your phone, and changing carriers will not fix it.
Q. 海外からフリーダイヤルへかけてつながるでしょうか？
A. 海外からはおつなぎできません。フリーダイヤルは、日本国内専用のサービスです。
“Calls from overseas cannot be connected. Free-dial is a Japan-only service.”
Official FAQ (Japanese)Q. 海外からナビダイヤルへかけてつながるでしょうか？
A. 海外から国際電話でナビダイヤルへ電話しても、おつなぎすることはできません。
“Even an international call to a navi-dial number from overseas cannot be connected.”
Official FAQ (Japanese)If you hit one of these numbers
- Look for another number for the same company: support pages usually list a 03 or 06 landline or a 050 IP number too.
- Use a web form, the company's app or email — most large Japanese companies run online support desks.
- Have someone call from Japan: a friend, the hotel front desk, or a service that dials from a Japanese number can reach 0120 and 0570 lines.
How to use Japan's country code +81
From abroad you dial international access code + 81 + the number with its leading 0 removed. The MIC Q&A puts it this way: 「国際プレフィックス、日本の国番号「81」、そして日本国内の電話番号を続けてダイヤルします。」 and 「日本国内の電話番号には国内プレフィックス（市外局番の前の「0」）を省略して市外局番からダイヤルすることです。」 The first 0 is Japan's domestic trunk prefix (“国内プレフィックス”), so it disappears once the call comes from outside the country.
| As written in Japan | International (E.164) | Why |
|---|---|---|
| 03-1234-5678 | +81 3-1234-5678 | Tokyo: drop the 0, so area code 03 becomes 3 |
| 0466-12-3456 | +81 466-12-3456 | Fujisawa: a 4-digit area code with a 2-digit exchange |
| 090-1234-5678 | +81 90-1234-5678 | Mobile: 11 digits, same leading-0 rule |
| 0120-123-456 | +81 120-123-456 | Correctly formatted — but this band cannot be reached from overseas |
Calling Japan from the US
Using the Tokyo number 03-1234-5678 as the example. 011 is the US international prefix; phones that accept the + sign can use +81 on the same route.
| Option | Dial | Notes |
|---|---|---|
| 011 (landline or mobile) | 011 81 3 1234 5678 | The MIC's example is 011-81-3-3504-XXXX |
| +81 | +81 3-1234-5678 | Use this on any phone that accepts the + sign, including while roaming |
International prefix and country code source: MIC numbering Q&A, Q4 (verified 2026-09-17).
Calling Japan from Taiwan
Chunghwa Telecom's international direct dial service uses the access code 002 (009 also works). Other Taiwanese carriers publish their own codes, so the checker only shows carriers whose official pages we could verify.
| Option | Dial | Notes |
|---|---|---|
| +81 | +81 3-1234-5678 | Works on any phone that accepts the + sign |
| Chunghwa Telecom 002 | 002 81 3 1234 5678 | 009 is the same carrier's other access code |
Access-code source: Chunghwa Telecom, international direct dial (009/002) (verified 2026-09-17). Availability and rates depend on your own line and plan.
Data
The prefix table behind this tool is downloadable. Every row carries the official page it came from so you can check it yourself or load it into your own code.
Source list
- Designation status of telecommunications numbers — MIC (Ministry of Internal Affairs and Communications, Japan): Designation status (as of 1 Sep 2026) and number format for 0120, 0800, 0570, 0990, 050, 060, 070, 080, 090, 020 and 0204.
- Q&A on telephone numbers — MIC (Japan): Country code 81, the US international prefix 011, dropping the leading 0, 10-digit landlines vs 11-digit mobiles, and the called-party-pays rule for 0120/0800.
- List of area codes (as of 1 March 2026) — MIC (Japan): The complete landline area-code table shipped in this tool, including each area code's length.
- List of area codes (Word file actually consulted) — MIC (Japan): Raw file used to check each area code and exchange length one by one.
- Adding 060 numbers for mobile phones — MIC (Japan): 060 is designated for 11-digit mobile numbers, but carriers announced a postponement on 8 July 2026.
- M2M dedicated numbers — MIC (Japan): Purpose of 020 (11 digits) and 0200 (14 digits), their designation requirements (no call connection to Type-1 facilities), and the 0204 paging band.
- Free-dial (0120) FAQ — NTT Communications (NTT Docomo Business): Official statement that 0120 numbers cannot be connected from overseas.
- Navi-dial (0570) FAQ — NTT Communications (NTT Docomo Business): Official statement that 0570 numbers cannot be connected from overseas.
- International direct dial (009/002) — Chunghwa Telecom: The 002/009 international access codes used when dialling from Taiwan.
Data verified 2026-09-17. Number bands and rules change — check the official pages before relying on a result.
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Common questions
How many digits does a Japanese phone number have?
Landlines are 10 digits: the leading 0 plus an area code of 1 to 5 digits, the exchange and a 4-digit subscriber number. Mobile numbers starting 070, 080 or 090 are 11 digits, IP phone numbers on 050 are 11 digits, toll-free 0120 and navi-dial 0570 are 10 digits, and toll-free 0800 is 11 digits. All of those lengths come from the MIC's designation-status page and numbering Q&A.
How do I call Japan from the US?
Dial the US international prefix 011, then Japan's country code 81, then the number with its leading 0 removed. The MIC's own example is 011-81-3-3504-XXXX for a Tokyo number. If your phone accepts the + sign, +81 3-1234-5678 works on the same route.
Why can't I call a 0120 or 0570 number from overseas?
NTT Communications' official FAQ says of free-dial (0120): 海外からはおつなぎできません。フリーダイヤルは、日本国内専用のサービスです。 — calls from overseas cannot be connected because free-dial is a Japan-only service. For navi-dial (0570) it says: 海外から国際電話でナビダイヤルへ電話しても、おつなぎすることはできません。 — even an international call from overseas cannot be connected. Both bands have to be dialed from a Japanese phone number.
How do I read a Japanese phone number out loud?
Read it digit by digit and say the hyphen as の, for example 03-1234-5678 is ゼロサン の イチニサンヨン の ゴロクナナハチ. Use ヨン for 4, ナナ for 7 and キュウ for 9, which is what Japanese speakers say on the phone. Staff often repeat the number back in chunks, so ask them to say it again if you miss a digit.
What are 050 and 060 numbers?
050 is the IP phone band (11 digits). Whether a 050 number accepts calls from abroad depends on the provider and the contract. 060 was designated in December 2024 for new 11-digit mobile numbers, but carriers announced a postponement on 8 July 2026, so no 060 numbers are in general service as of this page's verification date. Existing 070, 080 and 090 numbers keep working.
When the call has to come from a Japanese number
0120 and 0570 lines only answer calls placed from a Japanese phone number. If you are outside Japan, one option besides asking a friend or your hotel front desk is a service that dials from a Japanese number, such as NativeCall. It is just one option: whether a number answers still depends on the business, and it does not bypass anyone's booking or support rules.