> ## Documentation Index
> Fetch the complete documentation index at: https://docs.voxo.co/llms.txt
> Use this file to discover all available pages before exploring further.

# Callers get a "cannot be completed" message

> When certain callers can't reach your number, the most common fix is on their side — dialing the full 1 + area code + number.

When certain callers — often businesses on older landline or office phone systems — can't reach your number and hear "the call cannot be completed as dialed," the most common fix is on the caller's side: have them dial the full number.

## Ask the caller to dial 1 plus the area code

Many older office systems still dial 7 digits. Most U.S. areas now require the full 10-digit number, and some require `1` first. Ask the caller to dial **1 + area code + the 7-digit number**. This resolves it more often than you'd expect.

<Note>
  If 11-digit dialing works where 7-digit dialing failed, the caller's phone system needs a dialing-plan update. Only their phone vendor can make that change.
</Note>

**Contact support** if cell phones reach your number fine but multiple landline callers still can't get through after dialing the full number, so we can check for a carrier-level block on the calling side.