Area Code 983

Area code 983 is used in Denver and the surrounding areas of the state of Colorado. As an overlay code, it covers exactly the same geographic zone as the codes in the complex 303/720/983.

The main city associated with area code 983 is Denver, in the state of Colorado. However, this code may appear on phones throughout the region, including landlines, mobile phones, and VoIP services.

Area code 983 operates in the Mountain Time time zone. This is important to keep in mind when making calls to avoid contacting someone outside normal hours.

Yes, area code 983 is an overlay. It shares the same geographic zone as codes 303, 720, forming the complex 303/720/983. This means numbers with different area codes can coexist in the same area.

In the United States you always dial 10 digits directly: 983 + the 7 digits of the number, with no need to dial 1 first. This applies whether you're calling from the same area, a different code, a mobile, or a landline. Example: for the number 983-555-1234, dial 9835551234. If your carrier requires it you can add the 1 in front (1 + 983 + 7 digits), but in practice it's no longer necessary on most plans.

To call area code 983 from outside the United States, use the international format: +1 983 XXX XXXX. The +1 is the country code for the USA within the NANP. From countries where the exit prefix is 00, it would be: 00 1 983 XXX XXXX. In apps like WhatsApp, save the number as +1983XXXXXXX.

The incumbent carrier (ILEC) for area code 983 is QWEST CORPORATION. However, multiple companies operate in this area — approximate distribution: 71% landlines, 29% mobile.

Area code 983 is used for all types of lines: landlines, mobile, and VoIP. The current breakdown is approximately 71% landline, 29% mobile. Any carrier can assign numbers with this code regardless of the service type.

To ensure WhatsApp, iMessage, Telegram, or any messaging app correctly recognizes a 983 number, always save it in international format: +1 983 XXX XXXX. The +1 is the United States country code. Without that prefix, messaging apps may not find the account or may flag the number as unknown. Example: +1 983 555 1234.

Area code 983 is a legitimate code assigned to Denver, Colorado. Like any area code, it can be used by individuals, businesses, and in isolated cases by unwanted calls or spam. If you receive a suspicious call from a 983 number, you can verify the prefix in our search before calling back.