Main city: Plainfield
Timezone: Central
Phone type: Landline
Operator: Butler - Bremer Mutual Telephone Co.

Plainfield, a city in Bremer County, Iowa, United States. The population was 436 at the 2010 census a decrease of 2, or 0.5%, from 438 at the 2000 census. It is part of the Waterloo–Cedar Falls Metropolitan Statistical Area. ^source

Area code 319 is a telephone area code for southeastern and east-central Iowa. The 319 area code was one of the assignments of area codes in 1947, and originally covered Iowa's eastern third. (The map to the right is clickable; click on any of the area codes on the map to go to the area code for that region.) ^source