The 734 area code covers Ann Arbor, Livonia and 29 more places in Michigan.
Area code 734 is in Michigan, on Eastern Time. In the 734 area, phone numbers are given out most in Wayne County, then Washtenaw and Monroe counties. It has been in service since December 13, 1997. 679 covers the same area, so two neighbours can have different area codes.
- Where
- 4 counties in Michigan, mostly Wayne County, Washtenaw County and Monroe County
- Time zone
- Eastern Time
- In service since
- December 13, 1997
- Shares its area with
- 679 (since 2025)
- Prefixes in use
- 701
- How to dial
- Local calls inside 734 can still be dialed with just 7 digits.
Find out who called you from a 734 number.
Enter the full 10-digit number to see who it is listed to and the city and state on the listing. It is the same free check as our who called me lookup. To see only the caller ID name on the number, use our free CNAM lookup. To see whether it is a mobile, a landline or a VoIP line, use our free VoIP checker. To see which carrier a (734) number is on today, use our free carrier lookup.
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Ann Arbor holds 19% of the phone prefixes in area code 734.
A prefix is the three digits after the area code, and NANPA assigns each one to a town. Counting the 701 prefixes in use shows where 734 numbers are actually given out.
- Ann Arbor133 prefixes, 19%
- Livonia64 prefixes, 9%
- Wayne60 prefixes, 9%
- Ypsilanti52 prefixes, 7%
- Plymouth44 prefixes, 6%
- Monroe40 prefixes, 6%
- Wyandotte39 prefixes, 6%
- Trenton27 prefixes, 4%
Also served: Romulus, Dexter, New Boston and Flat Rock and 19 smaller places.
Michigan Bell (AT&T) holds the most phone number prefixes in area code 734: 161 of 701.
NANPA, which runs the North American numbering plan, assigns each prefix (the three digits after the area code) to one carrier. Here is how the 701 prefixes in use in 734 divide between carriers; holders this page does not name are grouped as other carriers.
| Carrier | Prefixes | Share |
|---|---|---|
| Michigan Bell (AT&T)AT&T's landline company | 161 | 23% |
| T-MobileMobile network | 55 | 8% |
| AT&T MobilityMobile network | 42 | 6% |
| Level 3 (Lumen)Lumen's business and wholesale network | 42 | 6% |
| PAETEC (Windstream)Windstream's business phone network | 42 | 6% |
| Teleport (AT&T)AT&T's business phone network | 37 | 5% |
| 29 other carriers | 322 | 46% |
71% of these prefixes are pooled, which means the blocks of 1,000 numbers inside them can belong to other carriers. Any number can also have been moved to another carrier since, so this shows who holds the prefixes, not who serves a given number.
Want the carrier of one exact number? Our free carrier lookup checks it, because numbers move between carriers.
Source: NANPA central office code assignments, October 1, 2026.
734 has covered the same ground since 1997.
1997
734 starts on December 13, 1997, split off from 313.
A 734 number on your screen can still be a scam, because caller ID is easy to fake.
- Let an unknown call go to voicemail. A real caller leaves a message; a robocaller usually does not.
- Look the number up with the box above before you call back, because calling back tells a robocaller your line is live.
- Hang up on anyone who wants gift cards, crypto or a wire transfer, or asks you to read out a code that was just texted to you.
- Report unwanted robocalls at reportfraud.ftc.gov, or paste a suspicious message into our free scam checker.
The area codes closest to 734 are 248, 586 and 810.
This list measures the distance between the centres of each area, across state lines, and shows codes that share one area together.
These are the questions people ask most about area code 734.
Where is area code 734?
734 covers Ann Arbor, Livonia, Wayne and Ypsilanti and 27 more places in Michigan. In the 734 area, phone numbers are given out most in Wayne County, then Washtenaw and Monroe counties.
What state is area code 734 in?
Michigan. 734 is a Michigan area code on Eastern Time.
What cities use area code 734?
The places holding the most 734 prefixes are Ann Arbor, Livonia, Wayne, Ypsilanti, Plymouth, Monroe, Wyandotte and Trenton, out of 31 places in all. The count comes from NANPA's prefix assignments as of October 1, 2026.
Which phone company owns area code 734?
No single phone company owns 734. NANPA's records show Michigan Bell (AT&T) holds the most 734 prefixes, 161 of 701, followed by T-Mobile and AT&T Mobility. Numbers move between carriers, so check one exact number with a carrier lookup.
What time zone is area code 734 in?
734 is on Eastern Time.
When did area code 734 start?
734 went into service on December 13, 1997, when it was split off from 313.
Is 734 the same area as 679?
Yes. 679 (since 2025) covers the same ground as 734. Nobody's number changed when it was added; new lines simply get whichever code has numbers left, so two neighbours can have different codes.
How do I dial a 734 number?
Local calls inside 734 can still be dialed with just 7 digits.
Is 734 a toll-free number?
No. 734 is a regular area code for Ann Arbor and Livonia in Michigan, not a toll-free one. The toll-free codes in North America are 800, 833, 844, 855, 866, 877 and 888.
What area codes are near 734?
The closest are 248/947 (Pontiac, Michigan), 586 (Mount Clemens, Michigan), 810 (Flint, Michigan) and 517 (Lansing, Michigan), measured between the centres of each area.
Who called me from a 734 number?
Enter the full 10-digit number in the lookup above. It returns the listed owner where there is a public record, where the number is registered, and whether it is a mobile, a landline or a VoIP line.
Is area code 734 a scam?
734 is a real Michigan area code, so the code itself is not a warning sign. Scam callers fake local-looking numbers on purpose, so judge the call by what the caller asks for, and look the number up before calling back.
Put this lookup on your site: our free area code widget takes two lines of code and shows any US area code's state, time zone and local time.
Source: NANPA, the North American Numbering Plan Administrator: its area code database and prefix assignments, as of October 1, 2026.