Area Code 405

About Area Code 405

Area code 405 is a geographic telephone area code assigned to Oklahoma City, Oklahoma. It operates in the Central time zone and was first introduced in 1947. Original NANP code. Central Oklahoma.

Within Oklahoma, area code 405 shares numbering capacity with 3 other area codes. The state's 4,059,394-person population (2023 Census Bureau estimate) is served by a combined 4 active codes, with 405 primarily responsible for the Oklahoma City region. Oklahoma's state capital is Oklahoma City, and its largest city is Oklahoma City.

When you receive a call from a 405 number on your Caller ID, the call originated from a phone number assigned to the 405 area code — but be aware that Local Number Portability (in effect since 2003) means the caller could be physically located anywhere in the US or Canada. Area code 405 only confirms where the number was originally assigned.

Where is the 405 area code located?

Area code 405 is assigned to Oklahoma City, Oklahoma, in the Central time zone. The state of Oklahoma uses 4 active area codes, and 405 is one of them. Calls placed from the 405 area code originate from numbers assigned by NANPA — the North American Numbering Plan Administrator — and the 405 prefix appears on Caller ID for both landline and wireless calls placed from this region.

The Central time zone observes Daylight Saving Time, shifting from UTC-6 to UTC-5 in summer. The local time shown above is always current, so you can quickly check whether it's a reasonable hour to call back.

What cities and counties use the 405 area code?

The 405 area code serves 11 notable cities, listed below in order of population. The largest city in the 405 territory is Oklahoma City (694,800 residents in Oklahoma County).

• Oklahoma City, OK — 694,800 residents (38.8% of 405 numbers)
• Tulsa, OK — 411,401 residents (23% of 405 numbers)
• Norman, OK — 128,771 residents (7.2% of 405 numbers)
• Broken Arrow, OK — 114,248 residents (6.4% of 405 numbers)
• Edmond, OK — 96,724 residents (5.4% of 405 numbers)
• Lawton, OK — 88,820 residents (5% of 405 numbers)
• Moore, OK — 62,389 residents (3.5% of 405 numbers)
• Midwest City, OK — 57,313 residents (3.2% of 405 numbers)
• Enid, OK — 50,394 residents (2.8% of 405 numbers)
• Stillwater, OK — 49,737 residents (2.8% of 405 numbers)

Phone number format in area code 405

All phone numbers within area code 405 follow the standard North American 10-digit format:(405) NXX-XXXX. The NXX is the central office prefix (also called an "exchange") and XXXX is the subscriber line number. For long-distance calls within the NANP, dial 1 + 405 + NXX + XXXX. From outside North America, dial your country's international access code, then 1 (the NANP country code), then the 10-digit number.

If you need to verify whether a specific 405 number is wireless, landline, or VoIP, you can use our reverse phone lookup tool. Be aware that number portability means the area code no longer guarantees the caller's physical location — only where the number was first assigned.

History of area code 405

Original NANP code. Central Oklahoma.

The original 86 area codes were assigned by AT&T and Bell Labs in 1947 as part of the North American Numbering Plan. At the time, rotary-dial phones meant codes with lower digits (like 212 for NYC, 213 for LA, 312 for Chicago) were given to the largest cities because they took less time to dial. Today's area code assignments still reflect those early choices, even though touch-tone and cell phones made the original reason obsolete.

Is the 405 area code safe to answer?

Area code 405 itself is a normal geographic code with no elevated spam risk. That said, scammers can spoof any area code — including 405 — so if you don't recognize the full number, let it go to voicemail and verify the caller's identity before calling back.