Dialing rules
10-Digit Dialing
In most of the country you now have to dial the area code even for a call across the street. Here's why the rules changed.
Last updated June 5, 2026
Ten-digit dialing means dialing the area code plus the 7-digit number for every call, including local ones. It's mandatory in all overlay areas, and a 2020 FCC order extended it nationwide to free up 988 as the Suicide and Crisis Lifeline. Calling 911 still works the same as always.
What 10-digit dialing means
For decades, a local call needed only seven digits. As overlays spread, that stopped working: two neighbors could share the same seven-digit number under different area codes. The fix is 10-digit dialing — always dial the 3-digit area code first, even for a local call.
Why the rules changed nationwide
In 2020 the FCC designated 988 as the nationwide number for the Suicide and Crisis Lifeline. But many areas still allowed seven-digit dialing, and some local numbers started with "988". To make the 988 shortcut work everywhere, the FCC required those areas to switch to 10-digit dialing. The transition completed in October 2021. Learn more about the 988 line.
Where 10-digit dialing applies
It is mandatory in every overlay metro and in any area that previously permitted seven-digit local calls but contained "988" prefixes. In practice, dialing all 10 digits works everywhere in the US, so it's the safe habit. Single-code regions may still accept seven digits, but there's no downside to always dialing 10.
Does this affect 911, 988, or 411?
No. Three-digit service codes are unaffected. You still dial 911 for emergencies, 988 for the crisis line, 211 for community help, and 411 for directory assistance. Ten-digit dialing applies only to regular phone numbers.
Quick answers
Frequently asked questions
Why do I have to dial the area code for local calls now?
Because overlays put two area codes over the same region, the network needs the area code to know which number you mean. The FCC also standardized 10-digit dialing to enable the 988 crisis line.
Will my old 7-digit speed dials still work?
In overlay areas, no — you'll need to update them to include the area code. In single-code regions, seven digits may still connect, but adding the area code always works.
Did 10-digit dialing change my phone number?
No. Your number is the same. Only the way you dial changed: you now include the area code.
Keep reading
Related guides
How US Area Codes Work · Overlay Area Codes Explained · Area Code Splits · Toll-Free Numbers · Newest & Upcoming Area Codes · Retired & Changed Area Codes · Spam & Scam-Risk Area Codes · Area Codes Near Me