Introduction
The 573 area code covers most of eastern Missouri outside St. Louis, stretching all the way down into a strange little sliver of land known as the Bootheel.
If that three-digit prefix just showed up on your phone, this guide explains exactly who might be calling and why.
Missouri residents and business owners both rely on these digits daily, since this territory covers the childhood home of one of America's most famous authors.
In this guide, you will learn where this prefix reaches today, why the state's newest overlay didn't need the usual ten-digit dialing switch, and how to spot the scams that try to hide behind it.
Stick around, because the story behind these three digits explains a lot about how eastern Missouri keeps issuing new numbers.
- The 573 area code went into service on January 7, 1996, created through a split of area code 314.
- It covers Columbia, Jefferson City, Cape Girardeau, Hannibal, Rolla, and the Missouri Bootheel region.
- A new overlay, area code 235, arrived in 2024 without requiring the usual switch to ten-digit dialing.
- Understanding what area code is 573 helps residents and business owners recognize which calls are genuinely local.
Getting Oriented With the 573 Area Code
The 573 area code identifies calls placed to or from Columbia, Jefferson City, and the surrounding communities of eastern Missouri. It covers a huge stretch of the state outside the St.
Louis metro area, reaching from the northeast corner down to the Arkansas border.
Pairing that local identity with reliable VoIP service providers helps a small team sound like an established local player rather than an outsider cold-calling into the market.
Any business that wants to look and sound local in mid-Missouri typically starts with a matching local number.
Home to Mark Twain's Hannibal
Hannibal, one of the eight principal cities in this area code, is where Samuel Clemens grew up before he became known to the world as Mark Twain. His childhood home along the Mississippi River still draws visitors today, giving this corner of the state a genuinely famous literary connection. A local business number here shares its numbering plan with one of American literature's most storied hometowns.
Where the 573 Area Code Actually Reaches
The 573 area code covers most of eastern Missouri outside St. Louis, including the distinctive stretch of land known as the Missouri Bootheel.
Columbia anchors the region as its largest city, home to roughly 128,000 residents and the University of Missouri, based on the most recent census figures. The whole area sits inside the Central time zone, matching St.
Louis and Kansas City.
Cities Covered by the 573 Area Code
- Columbia and Jefferson City, home to the state capital and a major state university
- Cape Girardeau and Hannibal, river towns along the Mississippi
- Rolla and Farmington, established in the state's mineral-rich Ozark foothills
- Sikeston and Poplar Bluff, anchoring the Missouri Bootheel to the south
A Strange Little Sliver Called the Bootheel
The Missouri Bootheel is a small, boot-shaped extension of the state that juts down into Arkansas, and it falls entirely within this area code. That odd-shaped region exists because of a 19th-century land dispute, giving Missouri one of the more unusual state borders in the country. Residents and businesses down in the Bootheel dial the same 573 prefix as those hundreds of miles north in Hannibal.
The History Behind the 573 Area Code
Area codes rarely appear out of nowhere, and this one is no exception. It exists today because Missouri's original area code 314 could no longer efficiently cover both St. Louis and the vast rural territory beyond it.
A Split That Redrew Missouri's Map
The 573 area code went into service on January 7, 1996, created by splitting away from area code 314, which had previously covered most of eastern Missouri including St. Louis. According to Wikipedia's area code 573 entry, regulators cited rapid subscriber growth threatening to exhaust the region's available numbers as the reason for the split. A permissive dialing period ran until July 7, 1996, giving residents time to adjust before the new code became mandatory.
A New Overlay Without the Usual Disruption
Missouri added area code 235 as an overlay on March 24, 2024, after the state's Public Service Commission approved it back in 2022. Unlike most modern overlays, this one didn't require a fresh switch to mandatory ten-digit dialing, since the nationwide 988 crisis line rollout had already made that the norm here years earlier. That timing made 235's arrival unusually smooth compared to overlays in other states.
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How to Get a Business Phone Number from Teloz
Teloz gives businesses a cloud-based phone system that works entirely through a browser, so there is no bulky hardware to install or maintain.
A company can claim a number in this area code, route calls with a built-in AI receptionist, and manage texts and voice traffic from one connected dashboard. Teloz is built for teams that want a real Columbia presence without opening a physical office there.
- 1. Visit the website and start a free trial or request a live demo.
- 2. Create your account using your business email address.
- 3. Choose a plan that fits your team's size and expected call volume.
- 4. Select your business number and pick a 573 area code, a toll-free prefix, or a local number elsewhere.
- 5. Set up your team, call routing, and IVR menu right inside the browser dashboard.
- 6. Configure the AI receptionist, voicemail transcription, and SMS settings to match your workflow.
- 7. Start making and receiving calls immediately from the webphone or any connected device.
Building Trust With a 573 Business Number
Businesses that serve Columbia, Jefferson City, or the surrounding communities gain something real by using a matching area code.
Local callers answer faster, trust faster, and refer their neighbors faster when the number on their screen looks familiar, especially once they recognize area code 573 on the display.
What area code is 573 signals to a customer here is simple: this business understands eastern Missouri and is reachable.
Choosing a Local Number Over Toll-Free
A toll-free number still has its place for national brands, but it can work against a business trying to look rooted in one specific region. A 573 area code number tells a caller in Cape Girardeau or Rolla that the company on the other end is part of their community, not a distant call center. For local service businesses especially, that distinction often decides whether the phone gets answered at all.
“This is not a random string of digits — it is the calling identity of eastern Missouri, from Mark Twain's Hannibal to the Bootheel near the Arkansas line.”
Spotting Scams on the 573 Area Code
The 573 area code itself is completely legitimate, used daily by real residents, hospitals, and small businesses across eastern Missouri. Scammers know that, which is why they spoof 573 caller IDs to make fraudulent calls look local and trustworthy.
The area code on the screen never tells the full story; the behavior of the caller does.
Warning Signs to Watch For
- Urgent demands to pay a bill immediately or face disconnection
- Requests for gift cards, wire transfers, or cryptocurrency payment
- Callers claiming to be law enforcement or a utility company demanding personal information
- One-ring calls designed to trigger a costly callback
Habits That Keep You Safe
Treat any unexpected call under area code 573 with the same caution you would use anywhere else. Hang up and dial the official number on a bill or website instead of trusting whatever shows up on caller ID, especially when the request involves money or personal details. Letting unfamiliar numbers go to voicemail costs nothing and blocks nearly every version of this scam before it starts, giving you time to verify who is actually calling.
Conclusion
The 573 area code is more than a random string of digits; it is the calling identity of eastern Missouri, from Mark Twain's Hannibal to the Bootheel near the Arkansas line. It has served the region since 1996, split away from area code 314 as St.
Louis and the surrounding countryside outgrew a single numbering plan. A new overlay, area code 235, joined the territory in 2024 without disrupting the dialing habits residents already knew.
Understanding what area code is 573 helps residents and business owners alike make sense of who is really on the line.
Eastern Missouri businesses that want to be taken seriously locally should treat their area code as more than an afterthought.
A matching 573 area code number signals roots in the community, while a smart platform behind it keeps every call, text, and voicemail organized in one place.
Claiming that number and building that trust is straightforward, from sign-up to your very first answered call.
Whether you are protecting yourself from a spoofed call or setting up a new business line, the next step in eastern Missouri starts with the right number.
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