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New area code number announced for the 573 area code region

Image Courtesy MGN Online
Rawpixel Ltd / CC BY 2.0
Image Courtesy MGN Online


The latest area code, 235, will soon be joining the current 573 area code in Missouri.

Officials say that an increase in demand for residential and business telephone numbers created the need to add a new area code to the existing 573 area code region.

The North American Numbering Plan Administrator (NANPA) says the new area code will ensure that customers will have a sufficient supply of telephone numbers to serve this area of the state. Officials with the NANPA indicated the 573 area code will exhaust its available supply of telephone numbers during the first quarter of 2025.

“The 573 area code is not going away and customers who have a telephone number with the
573 area code will not lose or have to change their telephone number,” said Missouri Public Service Commission Chairman Ryan Silvey in a release. “An overlay is a more efficient and less disruptive way to alleviate the exhaustion of available telephone numbers by simply assigning the new area code to new numbers.”

Telephone customers should know the following key facts about an area code overlay:

  • Telephone numbers will not change for any existing customers but new customers may be provided with telephone numbers containing the new 235 area code.
  • The price of a call, coverage area, or other rates and services will not change due to the overlay.
  • What is a local call now will remain a local call.
  • Customers in the overlay region must dial 10 digits for local calls.
  • Three-digit abbreviated dialing, to the extent currently available, such as 911, as well as 211, 311, 411, 511, 611, 711, or 811 will continue to work and not be affected.

Karl Wehmhoener


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