How to call Oklahoma, United States from Vietnam
Dial the following international dialing codes:

00 + 1 + City Code + Local Number

How to call Oklahoma in United States from Vietnam:

00 - Exit code when making an international call from Vietnam
1 - US country code for inbound calls
00 + 1 + City Code + Local Number - International dialing code format

World time zone information:

The time in Vietnam is now 09:06:38 AM (09:06:38 AM)
The time in Oklahoma United States is now (CLICK FOR TIME ZONES)

Save on your call:

, Oklahoma

Mobile codes:

To call a mobile phone in United States from Vietnam use the following dialing code format: 00 + 1 + The Number
Click here to search for another mobile country code.

The Oklahoma, United States area code chart below gives you the necessary information for calling Oklahoma cities. For international dialing instructions to Oklahoma, United States, use our drop down boxes at the top of this page or check out our easy-to-use country code search tool.

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Area Codes 91-120 (of 583)

Oklahoma Cities	City Code
Carrier	580
Carter	580
Cartwright	580
Cashion	405
Castle	918
Catoosa	918
Cement	405
Centrahoma	580
Chandler	405
Chattanooga	580
Checotah	918
Chelsea	918
Cherokee	580
Chester	580
Cheyenne	580
Chickasha	405
Choctaw	405
Chouteau	918
Claremore	918
Clarita	580
Clayton	918
Cleo Springs	580
Cleveland	918
Clinton	580
Coalgate	580 or 918
Colbert	580
Colcord	918
Coleman	580
Collinsville	918
Colony	405

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How to call Oklahoma, United States from Vietnam Dial the following international dialing codes: