Dialing Codes for Selected Countries

International Phone Number Format to Call Denver

To make an international phone call to Denver, CO, you will need to dial a phone number formatted roughly as follows:

International Phone Number Format

ddd	1	aaa	nnn nnnn
international access code	United States country code	area code	local subscriber number

Aside from the USA country code, all the other dialing codes still need to be plugged in with the correct information.

The international access code (or IDD) will be 1- to 4-digits long, depending on your country. You can find the IDD for selected countries below. If your country is not listed, please look up other IDDs here.

Phone Number Formats for Calling Denver

The phone number formats for making international calls to Denver landline or mobile phone numbers are listed below for selected countries.

Follow country links for additional dialing details. If your country is not listed, you can find general Denver dialing information here.

International Dialing Codes for Selected Countries