Here’s what to know and why it’s happening:

On July 16, 2020, the FCC adopted an Order (FCC 20- 100) approving the designation of 988 as the 3-digit abbreviated dialing code for the National Suicide Prevention Lifeline, requiring all telecommunications carriers, interconnected Voice over Internet Protocol (VoIP) providers, and one-way VoIP providers (covered providers) to make any network changes necessary to ensure that users can dial 988 to reach the existing National Suicide Prevention Lifeline: 1-800-273-8255 (TALK) starting July 16, 2022.

What is the impact of making the 988 a 3-digit dialing code?

In the area codes where the 988 is an assigned, working prefix, local calls will have to be dialed using all 10-digits of the phone number. To complete all local calls, you will need to dial area code + telephone number. This applies to all calls within your area code that are currently dialed with 7-digits.

What states/area codes are impacted by this Order?

There are 37 states and 83 area codes that are impacted by this Order where the 988 prefix is a working prefix and has 7-digit local dialing. This includes the entire Michigan 616, 810, 906, and 989 area codes.

...

When will 10-digit local dialing become mandatory?

Beginning October 24, 2021, you must dial 10-digits (area code + telephone number) for all local calls. On and after this date, local calls dialed with only 7-digits may not be completed, and a recording will inform you that your call cannot be completed as dialed. If you get this recording, you must hang up and dial again using the area code and the 7-digit telephone number.

https://www.clickondetroit.com/news/michigan/2021/09/27/mandatory-10-digit-local-dialing-starts-for-4-michigan-area-codes-in-october-what-to-know/