sensors Mode-S transponder

AC5697

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8940Q · BOEING 737 MAX 8 · operated by SOUTHWEST AIRLINES CO

Hex
AC5697
Octal
53053227
Decimal
11,294,359
Country
US
Tail
N8940Q
Type
B38M
No current signal · last broadcast 23h ago
Flights observed
17
Distinct callsigns
7
Country
US
Last broadcast
23h ago

Last known position

Most recent position reported by Mode-S AC5697.

Country allocation

The ICAO 24-bit address AC5697 falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 7 distinct

Callsign Airline Flights Last seen
SWA1578 - 4 2026-04-13
SWA3784 Southwest Airlines 3 2026-04-13
SWA2387 - 3 2026-04-13
SWA548 - 2 2026-04-12
SWA4930 - 2 2026-04-13
SWA107 - 2 2026-04-13
SWA1891 - 1 2026-04-13

Recent flights last 17

DateFlightRouteTakeoffLandingDuration
2026-04-13 SWA107 - Apr 13, 23:19 UTCApr 14, 02:14 UTC2h 55m
2026-04-13 SWA107 - Apr 13, 20:46 UTCApr 13, 22:14 UTC1h 28m
2026-04-13 SWA1578 - Apr 13, 19:50 UTCApr 13, 20:10 UTC20m
2026-04-13 SWA1578 - Apr 13, 19:22 UTCApr 13, 20:10 UTC48m
2026-04-13 SWA1578 - Apr 13, 16:15 UTCApr 13, 18:15 UTC2h 0m
2026-04-13 SWA1578 - Apr 13, 16:00 UTCApr 13, 16:15 UTC15m
2026-04-13 SWA1891 SJC → PDX Apr 13, 13:11 UTCApr 13, 14:50 UTC1h 39m
2026-04-13 SWA4930 - Apr 13, 06:25 UTCApr 13, 06:55 UTC30m
2026-04-13 SWA4930 - Apr 13, 05:01 UTCApr 13, 06:10 UTC1h 9m
2026-04-13 SWA2387 - Apr 13, 04:20 UTCApr 13, 04:40 UTC20m
2026-04-13 SWA2387 - Apr 13, 03:55 UTCApr 13, 04:40 UTC45m
2026-04-13 SWA2387 - Apr 13, 02:56 UTCApr 13, 03:59 UTC1h 3m
2026-04-13 SWA3784 DEN → ELP Apr 13, 02:10 UTCApr 13, 02:25 UTC15m
2026-04-13 SWA3784 DEN → ELP Apr 13, 00:39 UTCApr 13, 01:55 UTC1h 16m
2026-04-12 SWA3784 DEN → ELP Apr 12, 18:50 UTCApr 12, 20:15 UTC1h 25m
2026-04-12 SWA548 - Apr 12, 16:09 UTCApr 12, 17:35 UTC1h 26m
2026-04-12 SWA548 - Apr 12, 17:15 UTCApr 12, 17:35 UTC20m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the N8940Q page for operator, model, and routing details .

Mode-S AC5697 frequently asked

What is Mode-S code AC5697?
AC5697 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8940Q.
Where is Mode-S AC5697 registered?
Mode-S code AC5697 is allocated to United States (US). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is AC5697 broadcasting right now?
No active broadcast right now. Last signal was 23h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC5697, octal 53053227, decimal 11,294,359.
What flights does AC5697 operate?
Mode-S AC5697 has broadcast 7 distinct callsigns, including SWA1578, SWA3784, SWA2387, SWA548, SWA4930.