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Use Case: Will tell you when an operator was last heard. Helpful to see if the operator is currently on APRS and within range of a digi/igate. Good to use this tool before attempting to send APRS message.
To: FIND
Body: <Call Sign + SSID>
Use case: Send/receive sms text message to/from cell phones. Phone number must be opted in through the website. See this video
To:SMS
Body: @<Phone Number> <message>
Use case: Spot your POTA activation using APRS
Use Case: Will return operator's name, class, and state
To: WHO-IS
Body: <Call Sign>
Use Case: Get weather based on your current location. Location is determined by the last position report unless you specify a location.
To: WXBOT
Body: Today, Tonight, Tomorrow, Zip Code (Pick One)
Use Case: Get local repeater info. N1 in the body will get you the closest repeater. N2 will get you the closest two repeaters.
To: REPEAT
Body: N1
To much to list. See this page or this video
Use Case: Send email to any email address
To: EMAIL
Body: <email address> <message>
Example body: km4ack@arrl.net This is my email message sent from APRS
Use case: Send/receive Winlink message over APRS. Cumbersome but works
Note: Service down 30MARCH2026 per APRS Service Registry Use case: Get next ISS pass based on your location
To: ISS
Body: Next
Use case: Group messaging. APRS Thursday uses this for checkins.
To: ANSRVR
Body:
J <GROUP> (Create or join a group)
CQ <GROUP> <Your message> (Send message to the group)
U <GROUP> (Leave the group)
LIST (returns which groups you belong to)
Note: Subscriptions to groups expire in 24 hours. For APRS Thursday, you can check in with CQ HOTG (Your Message)
Use case: Send WhatsApp messages
See this page for usage details
Last revised 12NOV2025