Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — AREA-CODE/734

734 area code

Area code 734 is in Michigan. It covers Ann Arbor, Livonia, Westland and 46 other places: 55 ZIP codes in Wayne, Washtenaw, Monroe and 1 other county. Local time there is , Eastern Time. In service since 1997; 679 (2025) overlays it, so a number from there can have either code.

Time zone
Eastern
Largest city
Ann Arbor
Overlays
679
In service since
1997
Rate centres
33
Prefixes assigned
701 (7,010,000 numbers)

Who calls from a 734 number

NANPA records the carrier each block of 734 numbers is assigned to. Of the 6.7 million 734 numbers assigned, 38% are with mobile carriers (Verizon Wireless, T-Mobile and AT&T Mobility); 35% with cable, internet-calling, business and other carriers (Onvoy and Interactive Services Network); 24% with local phone companies (AT&T); 3% with paging companies.

That is who the numbers were assigned to: people keep their number when they change carrier, so any one number may have moved since.

Carriers holding the most 734 numbers
CarrierKindShare
AT&TLandline22%
Verizon WirelessMobile17%
T-MobileMobile13%
OnvoyCable, VoIP, other8%
AT&T MobilityMobile7%
Interactive Services NetworkCable, VoIP, other5%

An area code says where a number was issued, not where the caller is: people keep their numbers when they move, and caller ID can be set to show any number, which the FCC calls spoofing. If a call you did not expect asks for money or personal details, the FCC advises hanging up and calling the company back on a number you look up yourself. Unwanted calls can be reported to the FTC at ReportFraud.ftc.gov.

Places in area code 734

The 31 places with a telephone rate centre of their own using 734, largest first. Each links to its ZIP codes.

Places in area code 734
PlaceZIP codesPopulation
Ann Arbor, MI 8 122,036
Livonia, MI 5 93,851
Romulus, MI 1 24,831
Wyandotte, MI 1 24,489
Monroe, MI 2 20,320
Ypsilanti, MI 2 19,857
Trenton, MI 1 18,125
Wayne, MI 1 17,310
Newport, MI 1 14,056
Flat Rock, MI 1 10,340
Lambertville, MI 1 9,955
New Boston, MI 1 9,576
Plymouth, MI 1 9,214
Saline, MI 1 9,006
Temperance, MI 1 8,914
Whitmore Lake, MI 1 7,878
Erie, MI 1 7,085
Milan, MI 1 5,987
Dundee, MI 1 5,744
Chelsea, MI 1 5,426
Dexter, MI 1 4,521
Willis, MI 1 4,403
Gregory, MI 1 4,157
Belleville, MI 2 3,910
Rockwood, MI 1 3,161
Carleton, MI 1 2,595
Manchester, MI 1 2,522
Pinckney, MI 1 1,911
Petersburg, MI 1 1,179
Ida, MI 1 1,050
Maybee, MI 1 634

Nearby places using 734

These places have no rate centre of their own in NANPA's records; the nearest one uses 734. Near an area-code boundary that can be wrong for part of a town.

ZIP codes in area code 734

55 ZIP codes in 40 towns, by the town each is mailed to, largest first. Each links to its own page.

Where 734 numbers are issued

NANPA's rate centres with the most 734 prefixes (each prefix is 10,000 numbers), under NANPA's own abbreviated names.

Rate centres using area code 734
Rate centrePlacePrefixes
ANN ARBOR Ann Arbor 133
LIVONIA Livonia 64
WAYNE Wayne 60
YPSILANTI Ypsilanti 52
PLYMOUTH Plymouth 44
MONROE Monroe 40

Counties

The counties of its ZIP codes, most residents first, with how many of its ZIP codes each has.

Which code covers where you are now? What area code am I in? answers from your location.

Questions about area code 734

Where is area code 734?

Area code 734 is in Michigan. It covers Ann Arbor, Livonia, Westland and 46 other places: 55 ZIP codes in Wayne, Washtenaw, Monroe and 1 other county.

What ZIP codes are in area code 734?

55 ZIP codes, by the town each is mailed to: Ann Arbor (8, 48103 to 48113), Livonia (5, 48150 to 48154), Westland (2, 48185 to 48186), Romulus (48174) and 36 more towns. The full list is on this page.

What time zone is area code 734 in?

Eastern time.

Is a 734 number a mobile or a landline?

It can be either. 38% of 734 numbers are assigned to mobile carriers and 24% to local phone companies (NANPA, 2026-10-10); the rest are with cable, internet-calling, business and paging carriers. A number keeps its area code when it moves to another carrier.

What area codes overlay 734?

679. They cover the same area as 734, so a new number there can be given any of them.

Does a 734 number mean the caller is in Michigan?

Not necessarily. An area code says where the number was first issued. People keep their numbers when they move or switch carriers, and calling software can show any number, so a 734 call can come from anywhere.

Other area codes in Michigan

All 13 Michigan area codes, by area, with the cities each covers

Source: NANPA NPA database, central office code and thousands-block assignments, 2026-10-10. Places are matched to NANPA's rate centres by name; see sources.

Cite this page

zipcodes.pro. “Area code 734.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/area-code/734

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