North American Numbers Source-cited · ownership disclosed
Area code
947
In service
United States · since 2002

Oakland County (overlay)

All-services overlay of area code 248, covering the same Oakland County territory; added number supply rather than new geography.

The essentials Numbering data · NumberResearch · as of 2026-09-18
Place
Oakland County (overlay)
Type
geographic
Status
in service
In service since
2002
Projected exhaust
2065 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 947 is

Same as 248 — Oakland County (plus small parts of Wayne County)..

Communities served wholly or partly by 947:

PontiacTroySouthfieldFarmington HillsRochester HillsRoyal OakNoviAuburn Hills

Shares 248's exact footprint.

B · Relationships

How it relates to other codes

The codes 947 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?

Overlay · 2002 248 Oakland County Overlays the identical 248 geography.
What's changing. Active overlay of 248 since 2002.
C · History

How 947 got here

2000
Assigned as an overlay code for the 248 region (central-office-code exhaustion).
Source: Wikipedia
2002-01-26
Ten-digit dialing became mandatory after the permissive period ended.
Source: Wikipedia
D · Capacity

How full it is

Prefixes assigned
225
Prefixes available
575
Thousands-blocks assigned
2,010

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

Compare 947 with another code →
Sources
Wikipedia ↗
Area codes 248 and 947
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.