Call San Diego from Singapore

Phone Number Formats to Call San Diego from Singapore

In the United States, 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 US phone number, whether it is a mobile or landline number - and it doesn't matter for dialing purposes.

All US 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 San Diego area codes.

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

If the San Diego 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 San Diego from Singapore, you need to dial a phone number formatted as follows:

Call San Diego Landline Phone from Singapore

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

Call San Diego Mobile Phone from Singapore

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

* In Singapore, specific carriers and service plans have unique IDDs - see details below. All calls to Malaysia via all carriers use the prefix 020 without the Malaysia country code.

Click here for more on San Diego landline vs. mobile phone numbers.

Dialing Steps to Call San Diego from Singapore

To call a San Diego landline or mobile phone number from Singapore, follow this dialing procedure.

1. Dial Singapore int'l access code / IDD:  xxxx*

Individual carriers and even individual calling plans have unique IDDs in Singapore. The following is a partial list of IDDs and their associated service plans (if any) for the most popular Singapore carriers. Most IDDs are 3-digits long, some are 4-digits. Please confirm with your carrier before dialing.

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.

* Calls to Malaysia do not require use of a country code.

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

2. Dial US country code: + 1 

If your San Diego destination phone number starts with a ' 1 ' - e.g., 1 619 454 8180, then this serves as the country code. Don't dial ' 1 ' twice.

3. Dial a 10-digit San Diego phone number

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

a. Dial a 3-digit San Diego area code:  aaa 

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

Some common San Diego area codes are: 619 , 858 , and 760 . List of San Diego area codes