Area code
734
734 is a United States area code. Under the North American Numbering Plan it belongs to Michigan, which has 13 area codes in total.
Validate a number in 734
Paste a full number and the tool checks it against the numbering plan. It returns the standard formats, the line type the plan assigns and the area code region.
Digits with or without punctuation work. Numbers outside the US are read with the +country code.
Area code 734 at a glance
NANPA lists 700 central office codes (prefixes) in use in area code 734, held by 37 holders across 33 rate centers.
| Fact | Value |
|---|---|
| In service since | 1997-12-13 |
| Time zone | Eastern (E) |
| Assigned overlays | 679 (2025-11-07) |
| Prefixes in use | 700 |
| Pooled prefixes | 494 (71%) |
| Rate centers | 33 |
| Companies holding prefixes | 37 |
| Assignment dates on file | 2001-01-22 to 2026-03-04 (189 prefixes) |
| ZIP codes in its places | 43 |
Rate centers in area code 734
| Rate center | Prefixes | Share |
|---|---|---|
| ANN ARBOR | 133 | 19% |
| LIVONIA | 64 | 9% |
| WAYNE | 60 | 9% |
| YPSILANTI | 52 | 7% |
| PLYMOUTH | 43 | 6% |
| MONROE | 40 | 6% |
| WYANDOTTE | 39 | 6% |
| TRENTON | 27 | 4% |
| 25 other rate centers | 242 | 35% |
Who holds the prefixes in 734
Michigan Bell Tel holds the most prefixes, 161 (23%). 71% of the prefixes are pooled, which means their thousands-blocks can belong to different companies.
| Holder | Prefixes | Share |
|---|---|---|
| Michigan Bell Tel | 161 | 23% |
| Verizon Wireless | 71 | 10% |
| Omnipoint Communications Midwest Operations | 55 | 8% |
| Mcimetro Access Transmission Services | 52 | 7% |
| Level 3 Communications | 42 | 6% |
| Onvoy, Llcv | 42 | 6% |
| 31 other carriers | 277 | 40% |
A prefix holder is the company a code was assigned to, not necessarily a number's current carrier, because numbers can be ported to another company. Find which carrier a number is on, or browse the prefix holders.
History of area code 734
- 1947-01-01 Area code 313, named as the parent of 734 in the NANPA report, was in service.
- 1997-12-13 Area code 734 went into service.
Area codes nearest to 734
Distance is measured between the centers of the ZIP code places each area code serves, so it is a rough guide.
Overlay codes in the same area
- 679
ZIP codes in area code 734
43 ZIP codes fall in places that have a rate center in this area code.
| Place | ZIP codes |
|---|---|
| Ann Arbor, MI | 8 |
| Livonia, MI | 5 |
| Belleville, MI | 2 |
A ZIP code and an area code are unrelated systems. A ZIP code can sit in more than one area code, and an area code spans many ZIP codes.
Complaints on file for 734 numbers
2,095 FCC complaints are on file for 1,733 numbers in 734, most often filed as "Unwanted Calls". These are unverified consumer reports.
| Year of latest complaint | Numbers |
|---|---|
| 2023 | 81 |
| 2024 | 107 |
| 2025 | 107 |
Other area codes in Michigan
Michigan is one state with 13 area codes in the NANPA table. 734 is one of them.
Next to 734 in the numbering table
These are the codes just before and after 734 when all are sorted by number. They are neighbours on the list, not necessarily on the map.
What the area code does and does not tell you
A number that starts with 734 was first assigned in Michigan. That is a fact about where the number began, and it is a useful hint when you check a form entry, for example a billing address in Michigan next to a 734 phone number.
It does not show where the person is today. A number stays with its owner after a move or a change of provider (number portability), and mobile numbers travel with the handset. The area code also cannot tell you whether the line is active, who the carrier is, or whether the number is mobile or fixed: the plan shares those ranges. Read more about the area code, the numbering plan and line type.
Check numbers in bulk with the API
| Product | Credits | Docs |
|---|---|---|
| Phone Numbering-Plan Validation | 1 credit per valid number | API docs |
| Phone Intelligence (carrier and line status) | 1 credit per check (invalid numbers outside the US and Canada are free) | Product page |
Questions about area code 734
Where is area code 734?
NANPA assigns area code 734 to Michigan, United States.
In which state does area code 734 sit?
Michigan. 734 is one of 13 area codes the NANPA table assigns to the state.
Which places does area code 734 cover?
The places with the most ZIP codes among the rate centers in 734 are Ann Arbor, MI, Livonia, MI and Belleville, MI. The rate center list on this page shows all of them.
Who owns area code 734?
NANPA assigns area codes. Within 734, Michigan Bell Tel holds the most prefixes, 161 prefixes or 23%.
Which time zone does 734 use?
The NANPA NPA report lists the time zone for 734 as Eastern (E).
What year did 734 enter service?
The NANPA NPA report gives an in-service date of 1997-12-13, so 734 has been in use since 1997.
Does area code 734 have an overlay?
Yes. 679 (in service 2025-11-07) shares the same area with 734, so numbers from all of them are local to each other.
Which area codes are nearest to 734?
The area codes closest to 734, measured between the centers of the ZIP code places they serve, are 248 (about 32 miles), 947 (about 32 miles), 586 (about 44 miles), 517 (about 49 miles) and 810 (about 54 miles).
How many prefixes does area code 734 have?
NANPA's report dated 2026-10-17 lists 700 prefixes in service in 734, spread over 33 rate centers and 37 holders.
Are there complaints about 734 numbers?
The FCC data on file has 2,095 complaints for 1,733 numbers in 734. They are unverified consumer reports. A number with no complaints on file is not proven safe.
Area code assignments: North American Numbering Plan Administrator NPA report, file dated 10/17/2026, retrieved 2026-10-17. Source file. New codes are assigned several times a year. Prefixes, rate centers, holders, time zone, in-service date and overlays: NANPA central office code report dated 2026-10-17 and NPA report dated 2026-10-18. Complaints: FCC consumer complaints open data, fetched 2026-10-17. ZIP code places: Postal code places and coordinates: GeoNames (geonames.org), licensed CC BY 4.0.