Ohio area codes
Ohio uses 15 area codes. The oldest is 216, in service since 1947; the newest is 436, from 2024. Across them 7,304 of 11,790 possible number blocks are allocated, 62.0% of capacity. 330, 740, 513, 419, 937, 614 and 440 are at or past 95%, which is why new numbers there come from overlays rather than the original code. AT&T holds 26.5% of the 7,304 assigned blocks across the state, ahead of Verizon at 14.5%; a further 9.0% sits with CLEC and VoIP holders outside the national carriers. In the 33 days to 30 October 2026, FTC complaints named an Ohio caller ID 7,876 times – 3.5% of all complaints in the window, most often 614 with 1,157 (22nd of 422 nationally). NANPA records 1,177 rate centers across the state's codes.
All 15 codes
| Code | In service | Blocks used | Largest holder | Complaints | Shares area with |
|---|---|---|---|---|---|
| 216 | 1947 | 613/786 | AT&T 44% | 848 | no overlay |
| 220 | 2015 | 142/786 | Other CLEC / VoIP 29.6% | 305 | 740 |
| 234 | 2000 | 398/786 | Other CLEC / VoIP 25.6% | 423 | 330 |
| 283 | 2023 | 49/786 | Onvoy 40.8% | 53 | 513 |
| 326 | 2020 | 88/786 | Other CLEC / VoIP 55.7% | 140 | 937 |
| 330 | 1996 | 787/786 | AT&T 35.6% | 757 | 234 |
| 380 | 2016 | 138/786 | Onvoy 30.4% | 240 | 614 |
| 419 | 1947 | 783/786 | AT&T 21.3% | 614 | 567 |
| 436 | 2024 | 0/786 | – | – | 440 |
| 440 | 1997 | 757/786 | AT&T 26.8% | 879 | 436 |
| 513 | 1947 | 784/786 | Altafiber 33.2% | 847 | 283 |
| 567 | 2002 | 421/786 | Other CLEC / VoIP 23.3% | 361 | 419 |
| 614 | 1947 | 777/786 | AT&T 42.6% | 1,157 | 380 |
| 740 | 1997 | 786/786 | AT&T 22.3% | 574 | 220 |
| 937 | 1996 | 781/786 | AT&T 31.2% | 678 | 326 |
Block share is share of allocated number blocks, not of subscribers. Complaint counts cover 28 Sep – 30 Oct 2026 and reflect spoofed caller IDs as much as real calls.
How full Ohio’s codes are
A code holds at most 786 blocks of 10,000 numbers each. When a code fills up, the administrator does not reclaim numbers – it adds an overlay, and from then on new numbers in the same area come from the new code.
Full or nearly full
436 is in service with no blocks assigned at all, so nobody can hold a number there yet – a caller ID showing one is necessarily spoofed.
Who holds the number blocks
Counted from every assigned block in the state: 7,304 blocks, each with the holder NANPA recorded for it. Percentages are measured, not estimated.
| Holder | Blocks | Share of Ohio | Largest in |
|---|---|---|---|
| AT&T | 1,932 | 26.5% | 7 codes |
| Verizon | 1,058 | 14.5% | – |
| T-Mobile | 689 | 9.4% | – |
| Other CLEC / VoIP | 656 | 9% | 4 codes |
| Lumen | 546 | 7.5% | – |
| Onvoy | 447 | 6.1% | 2 codes |
| Frontier | 362 | 5% | – |
| Brightspeed | 301 | 4.1% | – |
| Windstream | 298 | 4.1% | – |
| Altafiber | 273 | 3.7% | 1 code |
| Charter | 238 | 3.3% | – |
| Bandwidth | 168 | 2.3% | – |
“Other CLEC / VoIP” is not one company: it is every holder outside the national carriers counted together, which is what resellers and app-based numbers look like in the records. This is allocation, not subscribers.
Spam complaints naming Ohio codes
FTC Do Not Call complaints where the caller ID shown was a Ohio number, 28 Sep – 30 Oct 2026 (33 days). Caller IDs on spam calls are routinely faked, so these are complaints about the code, not calls proven to come from it.
How Ohio got its codes
4 in the 1940s, 4 in the 1990s, 2 in the 2000s, 2 in the 2010s, 3 in the 2020s. Each code after the first was split off from or overlaid on one already in service.
- 1947 216 goes into service.
- 1947 419 goes into service.
- 1947 513 goes into service.
- 1947 614 goes into service.
- 1996 330 goes into service, split from or overlaid on 216.
- 1996 937 goes into service, split from or overlaid on 513.
- 1997 440 goes into service, split from or overlaid on 216.
- 1997 740 goes into service, split from or overlaid on 614.
- 2000 234 goes into service, split from or overlaid on 330.
- 2002 567 goes into service, split from or overlaid on 419.
- 2015 220 goes into service, split from or overlaid on 740.
- 2016 380 goes into service, split from or overlaid on 614.
- 2020 326 goes into service, split from or overlaid on 937.
- 2023 283 goes into service, split from or overlaid on 513.
- 2024 436 goes into service, split from or overlaid on 440.
Time zones
Ohio is in Eastern time.
Frequently asked about Ohio area codes
How many area codes does Ohio have?
15 in service. They are 216, 220, 234, 283, 326, 330, 380, 419, 436, 440, 513, 567, 614, 740 and 937.
What is the oldest area code in Ohio?
216, in service since 1947. Every later code in the state was split off from or overlaid on an existing one.
What is the newest area code in Ohio?
436, from 2024, overlaying 440.
Is Ohio running out of numbers?
330, 740, 513, 419, 937, 614 and 440 are at or past 95% of capacity, but NANPA has not opened relief planning for them, so no new code is announced.
What time zone is Ohio in?
Eastern time.
Which Ohio area code gets the most spam complaints?
614 – 1,157 FTC complaints in the 33 days to 30 October 2026, 22nd of 422 codes nationally. Those are complaints about the caller ID shown, and spam callers routinely fake a local-looking number, so this says the code is imitated often, not that the calls come from there.
Which carrier holds the most Ohio numbers?
AT&T, with 26.5% of the 7,304 blocks assigned across Ohio, ahead of Verizon at 14.5%. This is allocation of blocks by the numbering administrator, not a count of subscribers – people keep their numbers when they switch carriers.
Sources and verification
- NANPA – NPA Database (npa_report.csv), file date 11/01/2026, retrieved Nov 1, 2026
- NANPA – CO Code Assignment Records, All States (utilized), file updated 11/01/2026, retrieved Nov 1, 2026
- FTC – Do Not Call Reported Calls Data, 28 Sep – 30 Oct 2026, retrieved Nov 1, 2026
Figures on this page are counted from those files, not copied from other sites. Spotted an error? Request a correction. How we collect and check: methodology.