Area code 231 serves Michigan, United States. Eastern Time. In service since June 1999, split from 616.
Michigan
Area code 231 · United States · Eastern Time
The state and time zone on this page ride every phone parse. Send any number and they come back with validity, line type, and clean formats.
curl -s "https://api.parseapi.com/phone/2315550100" \ -H "X-Api-Key: $PARSEAPI_KEY"