What are the minimum and maximum digits for an extension number?
Short answer: By default, extensions are exactly 2 digits — from 10 to 99.
If your organization needs 3-digit or longer extensions, we can enable a custom setup on request.
Why the default is 2 digits
- Fast, low-error dialing: Short codes reduce misdials and make dial-by-extension quicker.
- IVR harmony: Two-digit extensions minimize conflicts with IVR menu keys and DTMF timeouts.
- Simple admin & reporting: A small, fixed range keeps assignment and audits straightforward.
Valid & invalid examples
✅ Valid (2 digits): 10, 21, 45, 99
❌ Invalid: 9 (too short), 007 / 100 (more than 2 digits)
Where to set or change a user’s extension (3 steps)
- Open Users → Go to Settings → Users in your MyOperator dashboard.
- Select a user → Open the user profile and find Extension.
- Assign & Save → Enter a two-digit code (10–99) and Save.
Expected result: The extension appears on the user profile, and dial-by-extension works for teammates.
For external callers, ensure IVR → Menu → Dial-by-Extension is enabled.
Need more digits (3+)?
We support custom ranges (e.g., 100–999) for teams that want department prefixes or large user counts.
- How to request: Email support@myoperator.co with your desired length (3 or 4) and range.
- Heads-up: We’ll adjust your dial-by-extension listener to the new length and verify IVR prompts/routing so callers aren’t blocked by timeouts.
Troubleshooting & edge cases
- “Extension already in use” → Pick a different code; every extension must be unique.
- “Invalid length” → Enter exactly two digits unless a custom 3+ digit range is enabled for your account.
- Caller can’t reach by extension → Confirm IVR → Dial-by-Extension is toggled on and the user has a valid extension.
- Conflicts with IVR keys → Avoid assigning extensions that overlap with single-digit IVR menu choices in prompts (e.g., don’t instruct “press 1” and expect a two-digit extension starting with
1at the same time).
Screenshots
Caption: Go to Manage, Users and then click on the 3 dots
Caption: Click Edit
Caption: Set or change the extension number by clicking here
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