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Denver Dialing Codes - At a Glance
Below is a recap of the important dialing codes you may need for making calls to, from, or within Denver.
Follow links for additional information on any code - or to look up that code for other countries.
National long distance code (NDD):
Denver phone numbers are 10-digits long consisting of a 3-digit area code and a 7-digit local subscriber number. The phone number format is the same for both landline and mobile phones.
Additional Denver dialing and calling information is provided throughout this site.
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