Squawk Codes – 7000, 7500, 7600, 7700

A squawk code is a four-digit number set into the aircraft’s transponder, allowing ATC to identify and monitor the aircraft on radar. These codes are assigned by ATC or pre-assigned in flight plans and help controllers correlate radio callsigns with radar returns.

• Four digits, using only numbers from 0 to 7
• Example: 7000, 1234, 4520
• Codes are set using transponder dials or digital avionics
• The code is transmitted automatically once the transponder is active

• “Squawk 7000” → Set code 7000
• “Squawk standby” → Stop transmitting temporarily
• “Squawk ident” → Press IDENT button to flash on radar
• “Reset squawk xxxx” → Re-enter code due to incorrect data or loss of radar contact
• “Confirm squawk” → ATC verifying the code you’re transmitting

Important: These codes must not be set by mistake — misuse can trigger major emergency responses.

• When assigned by ATC
• Automatically via Mode S transponder (for flight plan correlation)
• 7000 when operating VFR without a discrete code
• Switch to 2000 when entering another FIR if no code was received (country-specific)

ATC: “D-EABC, squawk 4725”
Pilot: “Squawk 4725, D-EABC”
(Pilot sets 4725 and confirms transmission with IDENT if requested)

When instructed to “Squawk Ident”, the pilot presses the IDENT button. This causes the aircraft’s radar return to highlight or flash on the ATC radar screen, helping the controller quickly locate the aircraft.

Always verify the current code when switching frequencies. If in doubt, confirm with ATC using:
“Confirm squawk for D-EABC?”