Area code 810 is a telephone area code in the North American Numbering Plan (NANP) for East Central Michigan. The numbering plan area (NPA) comprises the cities of Flint, Lapeer, Port Huron, and the southern portion of the Thumb.
Area code 810 was split off from area code 313 on December 1, 1993, with a permissive dialing period that ended on August 10, 1994. The initial numbering plan area included the counties of Oakland, Macomb, Genesee, Lapeer, St. Clair, and Sanilac as well as small sections of Saginaw, Shiawassee, Livingston, Washtenaw, and Wayne counties north of Detroit. Most of Washtenaw County, all of Monroe County, and the southern and western portions of Wayne County (including the City of Detroit) remained in the 313 area code. The split created Michigan's first new area code since 1961.
Only three years later, demand for telephone numbers increased such that Ameritech once again applied to the North American Numbering Plan Administrator for additional relief. As a result, Oakland County received the new area code 248, with a start of permissive dialing on May 10, 1997. Thus, the Oakland County numbering plan area was surrounded on three side by area code 810, with 313 to the south.
Then, only four years after splitting off area code 248, continued demand in the area necessitated the Michigan Public Service Commission to request another relief code, creating yet another numbering plan area in southeastern Michigan. Area code 586 was assigned to the eleven rate centers that comprise Macomb County, including Mt. Clemens, Roseville, Warren and Utica. The commission permitted the permanent grandfathering of wireless central office codes residing in rate centers that moved to the new NPA.
Area code 810 has telephone numbers assigned for the central office code 988. 988 has been designated nationwide as a dialing code for the National Suicide Prevention Lifeline, which creates a conflict for exchanges that permit seven-digit dialing. This area code is therefore scheduled to transition to ten-digit dialing, mandatory after October 24, 2021.
Prior TWX assignment
Area code 810 was originally one of three US regional area codes for the AT&T TWX (TeletypeWriter eXchange) network, sold to Western Union in 1969, and renamed as Telex II. The area of TWX service included Michigan, Ohio, Indiana and the US South (North Carolina, South Carolina, Georgia, Florida, Louisiana, Mississippi, Alabama, and Kentucky).
The original TWX area codes were 510 in the US and 610 in Canada. The addition of 710 in the Northeast (New England, New York, New Jersey, Pennsylvania, Maryland, Washington DC, Virginia and West Virginia), 810 from Michigan southward and 910 west of the Mississippi allowed each major city one or more local exchange prefixes in the special area code.
The special US TWX area codes (510, 710, 810, 910) were decommissioned in 1981; Canada moved its remaining 1-610 numbers to area code 600 in 1992.
In popular culture
Jimmy "B-Rabbit" Smith (Eminem) refers to area code 810 while free-styling as he fixes his car in the movie 8 Mile to insult "posers" who live in upperclass southern Macomb County suburbs (which were part of the area code in 1995 when the movie was set) instead of the lower income area code 313, which serves Detroit and Wayne County.
- NANP, Planning Letter No. IL-92/11-022 (November 23, 1992)
- NANPA Planning Letter PL-NANP-012 (October 8, 1996)
- NANPA Planning Letter PL-265 (March 1, 2001)
- "Transition to 10-digit dialing (for 988 as 3-digit access to National Suicide Prevention Hotline)" (PDF). North American Numbering Plan Administrator. January 8, 2021. Retrieved March 9, 2021.
- Traffic Routing Guide, sec. 15-16, AT&T, 1975
- Schafer, Joseph. "Violent pits, knife fights, and being shot: an interview with the notoriously violent King 810". Noisey.Vice.com. Noisey.Vice. Retrieved 5 February 2015.
|West: 517, 989||area code 810||East: 519/226, Lake Huron|
|South: 734, 248/947, 586|
|Ontario area codes: 226/519/548, 249/705, 289/365/905, 343/613, 416/437/647, 807|