Area Code 816

About Area Code 816

Area code 816 is a geographic telephone area code assigned to Kansas City, Missouri. It operates in the Central time zone and was first introduced in 1947. Original NANP code. Western Missouri Kansas City area.

Within Missouri, area code 816 shares numbering capacity with 5 other area codes. The state's 6,184,543-person population (2023 Census Bureau estimate) is served by a combined 6 active codes, with 816 primarily responsible for the Kansas City region. Missouri's state capital is Jefferson City, and its largest city is Kansas City.

When you receive a call from a 816 number on your Caller ID, the call originated from a phone number assigned to the 816 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 816 only confirms where the number was originally assigned.

Where is the 816 area code located?

Area code 816 is assigned to Kansas City, Missouri, in the Central time zone. The state of Missouri uses 6 active area codes, and 816 is one of them. Calls placed from the 816 area code originate from numbers assigned by NANPA — the North American Numbering Plan Administrator — and the 816 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 816 area code?

The 816 area code serves 11 notable cities, listed below in order of population. The largest city in the 816 territory is Kansas City (508,090 residents in Wyandotte County).

• Kansas City, MO — 508,090 residents (30.5% of 816 numbers)
• Saint Louis, MO — 286,578 residents (17.2% of 816 numbers)
• Springfield, MO — 171,591 residents (10.3% of 816 numbers)
• Independence, MO — 122,924 residents (7.4% of 816 numbers)
• Columbia, MO — 126,532 residents (7.6% of 816 numbers)
• Lee's Summit, MO — 102,092 residents (6.1% of 816 numbers)
• O'Fallon, MO — 92,652 residents (5.6% of 816 numbers)
• Saint Joseph, MO — 72,779 residents (4.4% of 816 numbers)
• Saint Charles, MO — 71,036 residents (4.3% of 816 numbers)
• Blue Springs, MO — 61,043 residents (3.7% of 816 numbers)

Phone number format in area code 816

All phone numbers within area code 816 follow the standard North American 10-digit format:(816) 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 + 816 + 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 816 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 816

Original NANP code. Western Missouri Kansas City area.

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 816 area code safe to answer?

Area code 816 itself is a normal geographic code with no elevated spam risk. That said, scammers can spoof any area code — including 816 — so if you don't recognize the full number, let it go to voicemail and verify the caller's identity before calling back.