Using and customizing DTMF codes In Zoom App

This post was most recently updated on July 23rd, 2022

In Zoom Phone, you can conveniently access certain features such as checking your voicemail or hiding your caller ID by using DTMF codes. In addition, you can customize some codes if you’re an admin.

Prerequisites for using and customizing DTMF codes

  • License for Zoom Phone
  • DTMF Codes need to be enabled by your administrator in order to function
  • Function To customize them you must be the owner of the account or an administrator

How to use default DTMF codes

These are the default DTMF codes for Zoom Phone. By clicking the embedded links in the Feature column, you can view more information and prerequisites for each feature.

Feature Keycode Customizable Details
Check voicemail or record voicemail greeting *86 No Select one of your direct numbers as the caller ID, then call *86 and enter your voicemail PIN Code to listen to voicemail messages or record a voicemail greeting.

This DTMF code also works for shared line groups by selecting the group’s direct number before calling *86.

Enforce caller ID *82 No Dial *82 before the phone number to enforce caller ID.
Park a call *5 Yes Dial *5 during an active call to park it. To retrieve parked call, press * followed by the retrieval code; for example, *811.
Park pickup *801 Yes Dial *801 to pick the call which is parking in location “801”.
Test audio connectivity *8378


No Call *8378 to test audio connectivity.
Hide caller ID *67 No Dial *67 before the phone number to hide Caller ID. This may not work in certain countries or regions.
Activating a device *90 No Call *90 to assign a device to yourself.
Sign in to hot desking session *91 No Call *91 and follow the audio prompts.
Sign out of hot desking session *92 No Call *92 and follow the audio prompts.
Group call pickup *98+[group extension number] No Call *98 followed the extension number of the call pickup group.
Call queue pickup *99+[call queue code] No Call *99 followed by the call queue code.
Monitor call (listen, whisper, barge, take over) Listen: *336

Whisper: *339

Barge: *332

Take over: *338

No Call the keycode followed by the extension number of the phone user you can monitor.

For example, if you can monitor extension 118, calling *338118 while the phone user is on a call will take over their call.

Switching call monitoring feature while monitoring a call Listen: *6

Whisper: *9


Takeover: *8

No While in monitoring a phone user, use these keycodes to switch between listen, whisper, barge, and take over.

You can’t use these codes when you takeover a call.

Barge into a call (internal safety response team) 3 or *2 No While monitoring an emergency call, members of an internal safety response team can press 3 or *2 to barge into the call.
Transfer to other extension’s voicemail **(extension) No Press the soft key to transfer to voicemail, press **(extension), then press Transfer.

The Zoom desktop client / mobile app, Yealink phones, and Poly phones have menu options for this, so there’s no need to use the DTMF code.

Start or stop ad hoc call recording

Stop automatic recording

*7 Yes Dial *7 during an active call to start or stop an ad hoc call recording, or stop an automatic recording.

Your admin can control your access to record calls. Contact your admin if this code doesn’t work for you.

Reserved testing number for VDI media detection only !9-6-6-6-8-3-4! No This number is a reserved number and cannot be used for setup.


How to customize DTMF codes (admins)

  1. Zoom’s web portal can be accessed by signing in.
  2. Select Phone System Management and select Company Info from the navigation menu.
  3. Select Account Settings.
  4. Click on Desk Phones.
  5. The next time you want to customize a code, click Edit next to it under Customize * and # Codes.
  6. You may enter 1 to 3 digits followed by *, **, or #.
  7. Codes that conflict with existing DTMF codes won’t be available.
  8. Then click Save.