sensors Mode-S transponder

AC5ADA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8954Q · operated by SOUTHWEST AIRLINES CO

Hex
AC5ADA
Octal
53055332
Decimal
11,295,450
Country
US
Tail
N8954Q
Type
B38M
No current signal · last broadcast 1d ago
Flights observed
18
Distinct callsigns
8
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S AC5ADA.

Country allocation

The ICAO 24-bit address AC5ADA 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 8 distinct

Callsign Airline Flights Last seen
SWA1966 - 5 2026-04-13
SWA486 - 4 2026-04-13
SWA595 - 3 2026-04-13
SWA3160 - 2 2026-04-12
SWA3812 - 1 2026-04-13
SWA3303 - 1 2026-04-13
SWA2865 - 1 2026-04-12
SWA1848 - 1 2026-04-13

Recent flights last 18

DateFlightRouteTakeoffLandingDuration
2026-04-13 SWA1848 - Apr 13, 22:59 UTCApr 14, 00:39 UTC1h 40m
2026-04-13 SWA3303 - Apr 13, 20:01 UTCApr 13, 21:52 UTC1h 51m
2026-04-13 SWA1966 OAK → ONT Apr 13, 18:01 UTCApr 13, 19:04 UTC1h 3m
2026-04-13 SWA1966 OAK → ONT Apr 13, 18:02 UTCApr 13, 18:59 UTC57m
2026-04-13 SWA1966 - Apr 13, 16:15 UTCApr 13, 17:05 UTC50m
2026-04-13 SWA1966 - Apr 13, 15:50 UTCApr 13, 17:05 UTC1h 15m
2026-04-13 SWA1966 - Apr 13, 14:50 UTCApr 13, 16:15 UTC1h 25m
2026-04-13 SWA595 - Apr 13, 12:20 UTCApr 13, 13:25 UTC1h 5m
2026-04-13 SWA595 - Apr 13, 11:55 UTCApr 13, 13:25 UTC1h 30m
2026-04-13 SWA595 - Apr 13, 10:55 UTCApr 13, 12:15 UTC1h 20m
2026-04-13 SWA486 - Apr 13, 04:20 UTCApr 13, 07:10 UTC2h 50m
2026-04-13 SWA486 - Apr 13, 04:12 UTCApr 13, 07:10 UTC2h 58m
2026-04-13 SWA486 - Apr 13, 02:55 UTCApr 13, 03:05 UTC10m
2026-04-13 SWA486 - Apr 13, 01:47 UTCApr 13, 02:39 UTC52m
2026-04-13 SWA3812 - Apr 13, 00:20 UTCApr 13, 01:20 UTC1h 0m
2026-04-12 SWA2865 - Apr 12, 19:03 UTCApr 12, 20:25 UTC1h 22m
2026-04-12 SWA3160 - Apr 12, 16:05 UTCApr 12, 17:40 UTC1h 35m
2026-04-12 SWA3160 - Apr 12, 17:15 UTCApr 12, 17:40 UTC25m

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 N8954Q page for operator, model, and routing details .

Mode-S AC5ADA frequently asked

What is Mode-S code AC5ADA?
AC5ADA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8954Q.
Where is Mode-S AC5ADA registered?
Mode-S code AC5ADA 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 AC5ADA broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC5ADA, octal 53055332, decimal 11,295,450.
What flights does AC5ADA operate?
Mode-S AC5ADA has broadcast 8 distinct callsigns, including SWA1966, SWA486, SWA595, SWA3160, SWA3812.