North American Numbers Source-cited · ownership disclosed
Area code
989
In service
United States · since 2001

Saginaw / Bay City / Midland

Central and northeastern Lower Michigan (the Tri-Cities and beyond), created by a 2001 split of area code 517; notable as the highest-numbered area code possible under current NANP rules.

The essentials Numbering data · NumberResearch · as of 2026-09-18
Place
Saginaw / Bay City / Midland
Type
geographic
Status
in service
In service since
2001
Projected exhaust
2038 Q2

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 989 is

Central Michigan, northeastern Lower Peninsula and part of The Thumb..

Communities served wholly or partly by 989:

SaginawBay CityMidlandMount PleasantAlpenaGaylordGrayling
B · Relationships

How it relates to other codes

The codes 989 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 · 2001 517 Lansing Split from 517.
Related 810 Flint / The Thumb Adjacent to the south/east.
Related 231 Traverse City / Muskegon Adjacent to the west/northwest.
What's changing. No overlay; single code. Highest-numbered NANP code currently in use.
C · History

How 989 got here

2001
Split off from area code 517, which had served most of the eastern half of the Lower Peninsula (except the southeast) for 54 years.
Source: Wikipedia
2021-10-24
Transitioned to 10-digit dialing (988 lifeline rollout).
Source: Wikipedia
D · Capacity

How full it is

Prefixes assigned
738
Prefixes available
62
Thousands-blocks assigned
3,106

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

Compare 989 with another code →
Sources
Wikipedia ↗
Area code 989
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.