Area code 679 vs 734
679 and 734 are overlay codes: they cover the same ground in Michigan, and a number in one is a local call to the other. 734 is the original, in service since 1997. 679 was added in 2025 because the first was filling up – that is what an overlay is for. Today 679 has 0 of 786 blocks assigned (0.0%) and 734 has 701 of 786 (89.2%), so a new number in the area now almost always comes from 679. 734 appears in the complaint data with 664 complaints in the window; 679 does not appear at all, which is what you would expect of a code that is barely used so far. Neither code is better or safer than the other. They are the same geography, the same carriers and the same dialing rules; the difference is only how long each has existed and how full it is.
Side by side
| 679 | 734 | |
|---|---|---|
| In service since | 2025 | 1997 |
| Region | Michigan | Michigan |
| Blocks assigned | 0 of 786 (0%) | 701 of 786 (89.2%) |
| Largest block holder | – | AT&T 34.4% |
| Complaints, 28 Sep – 30 Oct 2026 | not in the data | 664 (#151) |
| Rate centers | – | 33 |
Block share is allocation by the numbering administrator, not subscribers. Complaint counts cover 28 Sep – 30 Oct 2026 and measure how often each code is spoofed on caller ID.
Frequently asked
What is the difference between area codes 679 and 734?
None geographically – they overlay the same area, so the difference is age and how many numbers are left.
Do I need to dial the area code between 679 and 734?
Yes. Overlay areas use ten-digit dialing for local calls, including between the two codes. Seven digits reaches a recording.
Will a new number be 679 or 734?
Whichever has blocks left – currently 679, at 0% allocated against 89.2% for the other. Carriers draw from the code with free blocks, which is why the newer code spreads over time.
Is 679 or 734 more likely to be a spam call?
The data does not support a comparison: only one of the two appears in the complaint window.
Sources
- 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
Each code on its own: 679 · 734. All codes in Michigan: Michigan area codes.