Call Denver from Japan

Phone Number Formats to Call Denver from Japan

In the US, phone number formats are highly standardized with no variation across the country. As well, landline and mobile phone numbers are formatted exactly the same. It is not possible to tell, simply by looking at a American phone number, whether it is a mobile or landline number - and it doesn't matter for dialing purposes.

All United States phone numbers are 10-digits long and include a 3-digit area code and 7-digit local subscriber number. Increasingly, the same region may have multiple area codes. Local subscriber numbers are unique within an area code. Please check here for more information on Denver area codes.

United States phone numbers may be written to include a leading ' 1 '. This ' 1 ' can serve as either the United States country code for inbound international calls or as a national direct code for national long distance dialing in the US.

If the Denver phone number you have does not contain the full 10-digit phone number, then you'll need to double check to find the correct number.

To make an international phone call to Denver from Japan, you need to dial a phone number formatted as follows:

Call Denver Landline Phone from Japan

010*	1	aaa	nnn nnnn
international access code	country code	3-digit area code	7-digit landline number

Call Denver Mobile Phone from Japan

010*	1	aaa	nnn nnnn
international access code	country code	3-digit area code	7-digit mobile number

* If you are calling from a payphone or your calling plan does not specify an international carrier, you will need to select an international carrier by dialing an additional dialing code. See further details below.

Click here for more on Denver landline vs. mobile phone numbers.

Dialing Steps to Call Denver from Japan

To call a Denver landline or mobile phone number from Japan, follow this dialing procedure.

1. If needed, dial MYLINE carrier access code

A carrier-specific access code may be used or is required in some cases. See MYLINE / MYLINEPLUS details below

2. Dial Japan int'l access code / IDD:  010*

Note that some mobile operators may not require you to dial an IDD and/or may allow use of substitute characters (such as '+') in lieu of an IDD.

3. Dial USA country code: + 1 

If your Denver destination phone number starts with a ' 1 ' - e.g., 1 303 454 8180, then this serves as the country code. Don't dial ' 1 ' twice.

4. Dial a 10-digit Denver phone number

To reach a Denver landline number or a Denver mobile phone, dial a 10-digit number as follows:

a. Dial a 3-digit Denver area code:  aaa 

b. Dial a 7-digit local subscriber number: nnn nnnn

The main Denver area codes are 303, 720 - more Denver area codes

MYLINE / MYLINE PLUS Carrier Access Codes

You will need to dial a MYLINE / MYLINE PLUS carrier access code to make an international call in situations such as the following:

• if your phone plan does not specify a default carrier
• if you want to specify a different carrier than your preferred MYLINE carrier
• if you are calling from a payphone

Here are the MYLINE access codes for several major Japanese international carriers.

Due to mergers, new entrants, and other factors, the list above is likely to change frequently. Please doublecheck directly with your provider before dialing.

If your carrier is not listed, click here for the official list of Japan's MYLINE carrier access codes. Or check the list of MYLINE codes in Wikipedia.