North American Numbers Source-cited · ownership disclosed
Area code
734
Suspended
United States · since 1997

Ann Arbor / western Wayne

Southeast Michigan west and south of Detroit, created by a 1997 split of area code 313; anchored by Ann Arbor.

The essentials Numbering data · NumberResearch · as of 2026-09-18
Place
Ann Arbor / western Wayne
Type
geographic
Status
suspended
In service since
1997
Projected exhaust
2044 Q4

Status, dates and counts are read from NumberResearch (NANPA / CNAC / FCC records). Assignment records show initial assignees, not the carrier serving a number today.

A · Where it is

Where 734 is

All of Washtenaw and Monroe counties plus southern and western Wayne County..

Communities served wholly or partly by 734:

Ann ArborYpsilantiLivoniaWestlandCantonPlymouthMonroeSalineChelseaBellevilleWayneGarden CityMilanPinckney
B · Relationships

How it relates to other codes

The codes 734 was split from, spawned, or shares its area with. A split divides the map and changes some numbers; an overlay shares the same ground and changes none — what's the difference?

Split from · 1997 313 Detroit Split from 313.
Related 517 Lansing Adjacent to the north/west.
Related 248 Oakland County Adjacent to the north.
What's changing. No overlay; single code for its area.
C · History

How 734 got here

1997
Created by a split of area code 313 (announced May 30, 1997); serves Ann Arbor, Monroe and western Wayne.
Source: Wikipedia
D · Capacity

How full it is

Prefixes assigned
729
Prefixes available
71
Thousands-blocks assigned
3,265

Prefix-assignment counts describe allocation to carriers, not how many individual numbers are in use. Full technical records: NumberResearch ↗.

Compare 734 with another code →
Sources
Wikipedia ↗
Area code 734
NumberResearch.org ↗
Live status, dates, assignment counts and exhaust forecast — data as of 2026-09-18 (CC BY 4.0).

Place, relationships and history above are compiled by North American Numbers from the sources listed and last checked 2026-09-18. A check date is not an expert review — see how this is made. Flag an error.