The Kansas City MO area code is 816, and the city also uses 975, a newer overlay code that covers the same territory. An area code is the first three digits of a US phone number, and it points to the region where the number was first assigned. Both codes serve most of the Missouri side of the metro, including Kansas City, Independence, Lee's Summit and St. Joseph, and both run on Central time. The Kansas side of the metro uses 913, not 816.
This article explains why Kansas City has two codes, which counties and cities each one covers, and how 816 differs from 913 and the other codes around it. You also get a plain-language map, the time zone, and practical steps for dialing, screening unknown callers and getting a Kansas City number for your business.
Numoreé sells premium local phone numbers across hundreds of area codes. For the buyers we work with, the difference between an 816, a 975 and a 913 number is not trivia. It decides whether a number looks local to the customers they want to reach.
Why the Kansas City area codes matter
Kansas City has two area codes because 975 was laid over 816 as an overlay instead of splitting the region in two. Nobody had to change an existing number, and every local call now takes ten digits. That small change affects how you dial, how you read caller ID and how a business number comes across.
What the 975 overlay means in practice
An overlay adds a second area code to the same geographic area. Existing 816 customers kept their numbers, and new lines can be assigned either code, usually 975 once the supply of 816 numbers runs low. This is the new Kansas City area code people ask about. It does not replace 816.
The consequence is that two neighbors on the same street can have different area codes. An area code no longer tells you how long someone has lived in town. It only tells you the number is tied to the Kansas City region.
Kansas City's new area code is an addition, not a replacement: 816 stays, and 975 sits on top of it.
How it changes calls and caller ID
Every local call in an overlay region requires dialing all ten digits, even to the house next door. Saved contacts and business listings need the area code too. Old seven-digit speed dials and alarm systems may need reprogramming.
Caller ID deserves some caution. Scammers routinely spoof local codes so a call looks like it comes from a neighbor. An 816 or 975 prefix tells you where the number is registered, not that the caller is who they claim to be.
Why businesses care about the code
A local area code signals proximity. A plumber in Gladstone or a dentist in Liberty looks more rooted with an 816 or 975 number than with a toll-free line or an out-of-state code. Customers rarely say this out loud, but they act on it. Local presence builds trust before the first word of the call.
Where 816 and 975 apply
Area codes 816 and 975 cover the same footprint: most of the Missouri side of the Kansas City metro plus the northwest corner of the state. That footprint spans ten counties, with the dense core in Jackson, Clay, Platte and Cass counties and St. Joseph in the north.
Counties and cities covered
Kansas City, Missouri itself stretches across four counties, so the city name alone does not map neatly to a county. Use this table as a quick map of the main areas.
County | Main cities and towns
Jackson | Kansas City, Independence, Lee's Summit, Blue Springs, Raytown, Grandview
Clay | Liberty, Gladstone, North Kansas City, Excelsior Springs
Platte | Parkville, Platte City, Riverside
Cass | Belton, Raymore, Harrisonville
Buchanan | St. Joseph
Andrew, Clinton, DeKalb, Caldwell, Ray | Smaller towns and rural areas
If a number is in any of these places, its area code is either 816 or 975.
If the address is on the Missouri side of the Kansas City metro or in St. Joseph, expect 816 or 975.
Reading the map
Picture the metro as split by the state line. Everything east of State Line Road, which separates Kansas City, Missouri from the Kansas suburbs, belongs to the 816 and 975 footprint. Everything west of it is 913 territory. The Missouri River loops north of downtown, and Clay and Platte counties sit above it, but they still share the same codes as the south side.
For a quick reference, the rule is simple. Missouri side of the metro means 816 or 975, and the Kansas side means 913. The Kansas City, Missouri codes also reach well past the city limits, down to Harrisonville and up to St. Joseph.
Time zone
Both codes sit in the Central time zone. That means UTC-6 in winter and UTC-5 during daylight saving time. The Kansas side of the metro is also on Central time, so a call across State Line Road never involves a time difference.
816 vs 913 and the other nearby codes
The 816 and 975 codes belong to Missouri, and 913 belongs to Kansas. The two sides of the metro are separate states with separate cities, and the area codes follow that border.
Kansas City, Missouri vs Kansas City, Kansas
Kansas City, Kansas is its own city in Wyandotte County. The 913 area code covers it, along with Johnson County suburbs such as Overland Park, Olathe, Lenexa and Shawnee, and Leavenworth County. Kansas City, Missouri is the larger city and uses 816 and 975.
This is why the question "is Kansas City in Missouri or Kansas?" has a two-part answer. Both exist. The Chiefs play at Arrowhead Stadium in Kansas City, Missouri, so that team is a Missouri address. Sporting KC plays across the state line in Kansas City, Kansas. A number's area code usually tells you which side of the line it started on.
The state line decides everything: Missouri side is 816 or 975, Kansas side is 913.
Other codes around the metro
Some lookup sites label 660 or 417 as Kansas City. They are not part of the metro. They sit in other regions of Missouri, and they are easy to confuse with 816 because they were split from it decades ago.
Code | State | Region
816 and 975 | Missouri | Kansas City, MO metro and St. Joseph
913 | Kansas | Kansas City, KS, Johnson County, Leavenworth County
660 | Missouri | North-central and west-central Missouri, such as Sedalia and Warrensburg
417 | Missouri | Southwest Missouri, such as Springfield and Joplin
573 (with 235 overlay) | Missouri | Central and eastern Missouri, such as Columbia and Jefferson City
785 | Kansas | Northern and northeast Kansas, such as Topeka and Lawrence
620 | Kansas | Southern and western Kansas, such as Hutchinson and Dodge City
How to dial, check and use a Kansas City number
Dial all ten digits for any local call, use +1 for numbers from abroad, and treat the area code as a hint rather than proof of who is calling. Beyond that, a Kansas City number is easy to own even if you do not live in the city.
Dialing formats
The format depends on where you call from.
- Within the Kansas City area: area code plus seven digits, for example 816-555-0100.
- From elsewhere in the US: 1, then the area code and number.
- From another country: +1, then the area code and number.
The same formats work for 975 and 913.
Screening unknown callers
A 816 or 975 caller you do not recognize deserves the same care as any other. Let unknown numbers go to voicemail, and look up the full number, not just the prefix. Never act on a call that asks for payment, codes or account details, even if the caller ID looks local. Your carrier's spam blocking and your phone's block list handle repeat offenders.
Getting an 816 or 975 number for your business
You do not have to live in Kansas City to hold an 816 or 975 number. You can buy a local number and transfer it to your carrier or VoIP provider. With Numoreé, the buyer receives the account number, transfer PIN and porting instructions by email, and most transfers finish within 4 to 10 business days, depending on the carrier and number type. The purchase price is a one-time cost for the number, and your carrier may charge separate monthly service fees. Transfers generally cannot be refunded once they begin.
Between the two codes, 816 is the established one that many longtime residents associate with the city, while 975 numbers are newer. Both read as local. If a memorable pattern matters to you, search by area code and compare what is available.
Both 816 and 975 read as Kansas City, so pick the one with the pattern you can remember.
The short answer on Kansas City codes
Kansas City, Missouri uses 816 and the 975 overlay, both on Central time, and both limited to the Missouri side of the metro and the northwest part of the state. The Kansas side uses 913. Dial ten digits for every local call, and do not trust a local-looking area code on its own.
If you want a Kansas City presence for your business, a local number is a simple way to get it. You can search local premium numbers by area code on Numoreé and see which memorable patterns are currently available.