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Hearing Carry-Over Caller

HCO allows a person with a speech disability to listen to the person they are calling. The HCO user types his/her conversation for the Communications Assistant to read aloud to the standard telephone user. 

711 or
800-877-9965 (English)
800-829-2783 (Spanish)

Hearing Carry-Over (HCO)

How Does HCO Relay Work?

Dial 711 or 800-877-9965.


Notify the Communications Assistant that you are making a HCO call and give the area code and telephone number of the person that you wish to call.

The HCO user types to the Communications Assistant.​

The Communications Assistant reads aloud the typed message to the other party.​

The other party speaks directly to the HCO user.

How HCO works diagram


Other HCO Services

The Communications Assistant specializes in all types of HCO calls, such as HCO to TTY, or HCO to HCO. With this service, you have to specify your call type to the Communications Assistant.


HCO users can listen while the Communications Assistant is reading/voicing the TTY user's typed message. The HCO user types his/her conversation directly to the TTY user.


HCO users can contact other HCO users through Wyoming Relay Service. The Communications Assistant will voice to both parties what is typed on each user's TTY.

Customer Profile

The Wyoming Relay Customer Profile form allows consumers to list their preferences for calls, such as:

  • Frequently dialed numbers

  • Emergency numbers

  • Preferred gender of Communications Assistant

  • Announcing relay service


Learn more about Customer Profile.

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