The 740 area code covers southeastern and central Ohio — Zanesville, Newark, Lancaster, Athens, Marion, Chillicothe, Portsmouth and Marietta — the territory that has encircled Columbus since splitting from the capital’s 614 in December 1997 and has shared its map with the 220 overlay since April 22, 2015.
Chances are an unfamiliar 740 number is everyday southeast Ohio calling — a contractor, clinic, or lender from the counties ringing Columbus — but digits are not identity, and a 740 display can be faked outright.
740 at a glance
| Quick fact | Answer |
|---|---|
| In service since | December 6, 1997 |
| Split from | 614 — Columbus kept the old code; the surrounding counties became 740 |
| Overlay | 220, in service April 22, 2015 |
| Territory anchors | Zanesville, Newark, Lancaster, Athens, Marion |
| Dialing | Ten-digit, mandatory since March 21, 2015 |
| Exhaust projection | Q2 2059 for the shared 220/740 pool, per NANPA’s April 2026 analysis |
Its outline is the unusual part: 740 has an inner border as well as an outer one, wrapping Franklin County on every side while serving none of it. And the ring filled up before the hole did — these small towns activated their second area code in April 2015, ten months ahead of the capital they surround.
Marion to Marietta: reading the 740 map
NANPA’s relief paperwork names the anchors plainly: Athens, Cambridge, Delaware, Jackson, Lancaster, Marion, Newark, Marietta, Portsmouth and Zanesville. The rate-center map filed with the overlay letters fills in Chillicothe, Circleville, Coshocton, Mount Vernon, Logan, Gallipolis, Ironton and Steubenville — courthouse towns of the Appalachian foothills alongside the flatter farm counties north of them.
The southern edge runs with the Ohio River, from Steubenville down past Marietta and Gallipolis to Portsmouth and Ironton, while the northern arc reaches Marion and Mount Vernon well above the capital. Between the two sit Lancaster, Newark and Zanesville, and Athens supplies the college-town corner as home of Ohio University. All of it keeps Eastern Time.
Why does 740 wrap around Columbus without touching it?
Ohio opened the numbering plan in 1947 with four codes: 216 at Cleveland, 419 across the northwest, 513 at Cincinnati, and 614 spanning Columbus together with the central and southeastern counties. That last assignment was enormous — the capital shared its digits with towns down on the Ohio River itself — and fifty years of growth in the middle of the state finally forced the map apart.
The split took effect December 6, 1997: Franklin County and Columbus kept 614, and everything else in the old footprint became 740 — NANPA’s database still carries that date as the code’s first day in service. Planning Letter PL-NANP-101 ran permissive dialing through June 6, 1998, wireless carriers had until June 2001 to finish migrating, and the boundary produced the geometry that defines the code to this day: a closed ring with the capital as the hole.
Our 614 guide tells the inside of that story — including how Ohio’s commission redrew the relief boundary between the planning letter’s first draft and its final one — and the two pages describe the same split from opposite banks of the county line.
Two planning letters for one overlay
Relief came back around sixteen years later. On December 11, 2013, the Public Utilities Commission of Ohio approved an all-services overlay for 740 in Case No. 13-700-TP-COI, and NANPA’s database logs 220 as assigned that very day — commission order and code assignment sharing a date stamp. No existing number changed; the region simply gained a second code across the identical footprint, the fix that had displaced boundary splits industry-wide, as our area code guide traces.
Planning Letter PL-462 (February 3, 2014) published the schedule: customer education from March 20, 2014, permissive ten-digit dialing at 12:01 a.m. Eastern on September 20, 2014, mandatory ten-digit dialing on March 21, 2015, and the first 220 prefixes eligible to activate on April 22, 2015 — the overlay’s effective date. Carriers proved their routing against a test number that leaned into the digits, 220-220-1220, live from January 22 through May 22, 2015.
Then the rulebook moved mid-project. On October 24, 2014, the Industry Numbering Committee amended Section 6.1.2 of the central-office code assignment guidelines so that prefixes in a new overlay code could be requested no earlier than 66 days before its effective date. NANPA reissued the letter as PL-471 that same day, and the one line that changed pushed the 220 ordering window from October 22, 2014 to February 15, 2015 — sixty-six days, to the day, ahead of April 22.
Ten digits since March 21, 2015
Since March 21, 2015, every local call within 740 or 220 — and between them — has taken ten digits, with 1-plus-ten completing as well; toll calls take the full eleven. The early conversion is why the 988 transition passed the region by: NANPA’s PL-556 (January 8, 2021) listed the 82 seven-digit codes required to change for the crisis line, and Ohio appeared just twice, for 440 and 513. By then, 740 had nothing left to convert.
Room to spare until 2059
NANPA’s April 2026 exhaust analysis — the 2026-1 study, computed from utilization and prefix data as of March 1, 2026 — projects the shared 220/740 pool into the second quarter of 2059. That is fifteen quarters beyond the October 2025 forecast of third-quarter 2055, a move NANPA attributes to reduced historical and projected demand, and the July 6, 2026 revision — four Texas complexes and nothing else — left Ohio’s dates alone.
The database shows the pair in neither jeopardy nor relief planning. The core-and-ring rivalry does continue in the forecast tables: the 380/614 complex inside the hole now projects to third-quarter 2066, seven years past the ring around it. Both sides of the county line hold decades of headroom either way.
The handshake value of a 740 display
For a business calling into these counties, the display is the handshake. A Zanesville contractor, a Chillicothe clinic, or a lender working Athens files all benefit from digits the neighbors recognize, and the answer-rate arithmetic behind that sits in our local-presence dialing guide. 740 and 220 carry identical weight everywhere on the map; which one a new order draws depends only on prefix inventory that day.
Digits are not identity, though — caller ID spoofing can fake a southeast Ohio number outright — so verification has to come from the carrier signing the call, not the screen displaying it.
SIPNEX, an FCC-licensed carrier, provisions local DID numbers by rate center — 740-territory exchanges included as order-day inventory shows — and delivers them over SIP trunking to whatever PBX or dialer the desk already uses. Every outbound call is signed at A-level attestation under the STIR/SHAKEN certificate SIPNEX holds in its own name.
740 area code FAQ
What part of Ohio uses the 740 area code?
Southeastern and central Ohio outside Columbus: Zanesville, Newark, Lancaster, Marion, Athens, Chillicothe, Portsmouth, Marietta, Cambridge and Steubenville, with the code wrapping Franklin County on all sides. NANPA’s overlay letters name Athens, Cambridge, Delaware, Jackson, Lancaster, Marion, Newark, Marietta, Portsmouth and Zanesville as the anchor communities, and the entire footprint has doubled as 220 territory since April 22, 2015.
Does a 220 number mean the same thing as a 740 area code number?
Yes — identical territory, identical dialing, identical local standing. 220 is an all-services overlay activated on April 22, 2015, so it simply marks the newer pool of numbers on the same map. The Public Utilities Commission of Ohio ordered the overlay on December 11, 2013 in Case No. 13-700-TP-COI, and NANPA’s Planning Letters PL-462 and PL-471 set the rollout. Nothing about any existing number changed when 220 arrived.
What date did the 740 area code go ten-digit?
March 21, 2015 — the day the 220 overlay’s permissive window closed and ten-digit local dialing became mandatory across the region. The permissive period had run since September 20, 2014 under PL-462. Because the conversion came in 2015, the 2021 push that moved 82 seven-digit codes to ten digits for the 988 crisis line — NANPA’s PL-556 — listed 440 and 513 for Ohio and skipped 740 entirely.
How many years of numbers does the 740 area code have left?
Roughly three more decades on the current forecast: NANPA’s April 2026 study projects the combined 220/740 supply to the second quarter of 2059. That is fifteen quarters later than the October 2025 estimate, a shift NANPA attributes to reduced historical and projected demand, and the July 6, 2026 forecast revisions dealt only with Texas complexes. The pair sits in neither jeopardy nor active relief planning.
Can I use a 740 area code number from another state?
Yes. A 740 number is tied to a rate center like Zanesville or Athens, not to a street address, so it can ring a SIP endpoint anywhere. SIPNEX assigns local DID numbers by rate center and routes them over SIP to any PBX, softphone or dialer, letting an out-of-state team answer southeast Ohio calls with a southeast Ohio identity. Availability depends on what the rate center holds on order day.
Numbers that read as Lancaster, Marion or Marietta earn their answer rates one ring at a time — and SIPNEX backs them with direct FCC licensure, dialer-grade SIP trunking, RespOrg-registered toll-free, and A-level attestation under its own certificate. Call (833) 665-2220, write to the carrier team, or see published pricing.
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