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 09:17:55 AM (09:17:55 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 1-30 (of 583)

Oklahoma Cities	City Code
Achille	580
Ada	580
Adair	918
Adams	580
Addington	580
Afton	918
Agra	918
Albany	580
Albert	405
Albion	918
Alderson	918
Alex	405
Aline	580
Allen	580
Altus	580
Altus Afb	580
Alva	580
Amber	405
Ames	580
Amorita	580
Anadarko	405 or 580
Antlers	405 or 580
Apache	580
Arapaho	580
Arcadia	405
Ardmore	580
Arkoma	918
Arnett	580
Asher	405
Atoka	580

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