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sensors Mode-S transponder

AC5AFD

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8955Q · operated by SOUTHWEST AIRLINES CO

Hex
AC5AFD
Octal
53055375
Decimal
11,295,485
Country
US
Tail
N8955Q
Type
B38M
No current signal · last broadcast 4h ago
Flights observed
671
Distinct callsigns
20
Country
US
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S AC5AFD.

Country allocation

The ICAO 24-bit address AC5AFD 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 20 distinct

Callsign Airline Flights Last seen
SWA381 Southwest Airlines 6 2026-06-08
SWA120 - 6 2026-07-06
SWA4529 Southwest Airlines 4 2026-05-31
SWA4112 Southwest Airlines 4 2026-05-08
SWA398 - 4 2026-06-23
SWA3417 - 4 2026-06-14
SWA2719 - 4 2026-07-06
SWA2485 Southwest Airlines 4 2026-04-16
SWA1926 Southwest Airlines 4 2026-05-09
SWA704 - 3 2026-07-12
SWA544 - 3 2026-06-21
SWA446 - 3 2026-07-11
SWA3936 Southwest Airlines 3 2026-06-01
SWA3778 Southwest Airlines 3 2026-04-14
SWA376 Southwest Airlines 3 2026-05-19
SWA3541 Southwest Airlines 3 2026-05-15
SWA3521 Southwest Airlines 3 2026-05-19
SWA3151 - 3 2026-06-23
SWA2942 - 3 2026-06-29
SWA280 - 3 2026-04-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 SWA4164 - Jul 15, 01:45 UTCJul 15, 02:15 UTC30m
2026-07-15 SWA4164 BWI → PIT Jul 15, 01:41 UTCJul 15, 02:15 UTC34m
2026-07-14 SWA822 - Jul 14, 15:10 UTCJul 14, 23:20 UTC8h 9m
2026-07-14 SWA3559 - Jul 14, 10:30 UTCJul 14, 13:35 UTC3h 5m
2026-07-14 SWA296 - Jul 14, 05:35 UTCJul 14, 06:30 UTC55m
2026-07-14 SWA1822 - Jul 14, 03:25 UTCJul 14, 04:20 UTC55m
2026-07-14 SWA2254 PHX → SAT Jul 14, 00:25 UTCJul 14, 02:30 UTC2h 5m
2026-07-14 SWA2254 PHX → SAT Jul 14, 00:23 UTCJul 14, 02:26 UTC2h 3m
2026-07-13 SWA4129 DAL → PHX Jul 13, 21:10 UTCJul 13, 23:15 UTC2h 5m
2026-07-13 SWA2757 MDW → DAL Jul 13, 17:45 UTCJul 13, 19:30 UTC1h 45m
2026-07-13 SWA2757 MDW → DAL Jul 13, 17:41 UTCJul 13, 19:24 UTC1h 43m
2026-07-13 SWA4037 MCO → MDW Jul 13, 13:30 UTCJul 13, 15:45 UTC2h 15m
2026-07-13 SWA4037 MCO → MDW Jul 13, 13:26 UTCJul 13, 15:38 UTC2h 12m
2026-07-13 SWA4483 - Jul 13, 10:15 UTCJul 13, 12:10 UTC1h 55m
2026-07-13 SWA2556 - Jul 13, 01:50 UTCJul 13, 03:25 UTC1h 35m
2026-07-12 SWA2029 - Jul 12, 22:55 UTCJul 13, 00:30 UTC1h 35m
2026-07-12 SWA331 - Jul 12, 20:01 UTCJul 12, 21:35 UTC1h 35m
2026-07-12 SWA3917 PHX → ATL Jul 12, 15:05 UTCJul 12, 18:20 UTC3h 15m
2026-07-12 SWA2236 - Jul 12, 10:45 UTCJul 12, 13:50 UTC3h 5m
2026-07-12 SWA704 - Jul 12, 02:25 UTCJul 12, 05:35 UTC3h 10m
2026-07-12 SWA704 LAS → SDF Jul 12, 02:23 UTCJul 12, 05:33 UTC3h 10m
2026-07-11 SWA704 - Jul 11, 23:30 UTCJul 12, 00:55 UTC1h 25m
2026-07-11 SWA2315 - Jul 11, 21:10 UTCJul 11, 22:15 UTC1h 5m
2026-07-11 SWA2315 OAK → BOI Jul 11, 21:08 UTCJul 11, 22:11 UTC1h 3m
2026-07-11 SWA446 - Jul 11, 19:15 UTCJul 11, 20:05 UTC50m
2026-07-11 SWA446 - Jul 11, 16:55 UTCJul 11, 18:00 UTC1h 5m
2026-07-11 SWA446 DEN → TUS Jul 11, 14:15 UTCJul 11, 15:45 UTC1h 30m
2026-07-11 SWA3909 STL → DEN Jul 11, 11:15 UTCJul 11, 13:00 UTC1h 45m
2026-07-11 SWA3909 STL → DEN Jul 11, 11:11 UTCJul 11, 13:01 UTC1h 50m
2026-07-11 SWA1756 DEN → STL Jul 11, 04:38 UTCJul 11, 06:06 UTC1h 29m
2026-07-11 SWA1756 DEN → STL Jul 11, 04:40 UTCJul 11, 06:15 UTC1h 35m
2026-07-10 SWA2557 - Jul 10, 22:25 UTCJul 11, 02:20 UTC3h 55m
2026-07-10 SWA4530 BNA → RIC Jul 10, 19:48 UTCJul 10, 20:58 UTC1h 10m
2026-07-10 SWA719 - Jul 10, 15:15 UTCJul 10, 18:10 UTC2h 55m
2026-07-10 SWA4287 - Jul 10, 11:45 UTCJul 10, 13:55 UTC2h 10m
2026-07-10 SWA2912 - Jul 10, 03:45 UTCJul 10, 05:05 UTC1h 20m
2026-07-10 SWA3441 RIC → MDW Jul 10, 01:10 UTCJul 10, 03:00 UTC1h 50m
2026-07-10 SWA3441 RIC → MDW Jul 10, 01:10 UTCJul 10, 02:42 UTC1h 32m
2026-07-09 SWA1693 - Jul 9, 21:05 UTCJul 9, 23:55 UTC2h 50m
2026-07-09 SWA392 LAS → DEN Jul 9, 15:40 UTCJul 9, 20:00 UTC4h 20m
2026-07-09 SWA392 OKC → LAS Jul 9, 11:40 UTCJul 9, 13:45 UTC2h 5m
2026-07-09 SWA608 BNA → OKC Jul 9, 03:25 UTCJul 9, 04:50 UTC1h 25m
2026-07-09 SWA2157 - Jul 9, 01:05 UTCJul 9, 02:20 UTC1h 15m
2026-07-08 SWA2502 - Jul 8, 21:20 UTCJul 8, 23:20 UTC2h 0m
2026-07-08 SWA4719 MCO → AUS Jul 8, 18:00 UTCJul 8, 20:15 UTC2h 15m
2026-07-08 SWA4719 MCO → AUS Jul 8, 17:59 UTCJul 8, 20:09 UTC2h 10m
2026-07-08 SWA4889 LAS → MCO Jul 8, 12:10 UTCJul 8, 16:20 UTC4h 10m
2026-07-08 SWA4889 LAS → MCO Jul 8, 12:08 UTCJul 8, 16:15 UTC4h 7m
2026-07-08 SWA372 SEA → OAK Jul 8, 03:30 UTCJul 8, 04:10 UTC40m
2026-07-08 SWA646 SJC → ONT Jul 8, 01:45 UTCJul 8, 02:40 UTC55m

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 N8955Q page for operator, model, and routing details .

Mode-S AC5AFD frequently asked

What is Mode-S code AC5AFD?
AC5AFD is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8955Q.
Where is Mode-S AC5AFD registered?
Mode-S code AC5AFD 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 AC5AFD broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC5AFD, octal 53055375, decimal 11,295,485.
What flights does AC5AFD operate?
Mode-S AC5AFD has broadcast 20 distinct callsigns, including SWA381, SWA120, SWA4529, SWA4112, SWA398.