Apparatus

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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 Jul 26, 21:15 UTC
Flights observed
757
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:15 UTC

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
SWA1355 - 5 2026-07-15
SWA596 Southwest Airlines 4 2026-07-24
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
SWA542 Southwest Airlines 3 2026-07-23
SWA4959 Southwest Airlines 3 2026-07-21
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

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA2980 ORD → TPA Jul 26, 19:35 UTCJul 26, 21:15 UTC1h 40m
2026-07-26 SWA236 STL → HOU Jul 26, 17:15 UTCJul 26, 18:10 UTC55m
2026-07-26 SWA1540 DAL → AMA Jul 26, 15:30 UTCJul 26, 16:10 UTC40m
2026-07-26 SWA973 LAS → AUS Jul 26, 13:00 UTCJul 26, 14:20 UTC1h 20m
2026-07-26 SWA3886 MDW → BWI Jul 26, 06:16 UTCJul 26, 09:50 UTC3h 34m
2026-07-26 SWA3886 MDW → BWI Jul 26, 06:20 UTCJul 26, 09:55 UTC3h 36m
2026-07-26 SWA3753 STL → JAX Jul 26, 03:45 UTCJul 26, 04:40 UTC55m
2026-07-25 SWA4457 BUR → PHX Jul 25, 23:10 UTCJul 26, 02:05 UTC2h 55m
2026-07-25 SWA4457 BUR → PHX Jul 25, 23:08 UTCJul 26, 01:56 UTC2h 49m
2026-07-25 SWA164 PDX → OAK Jul 25, 19:05 UTCJul 25, 21:55 UTC2h 50m
2026-07-25 SWA164 PDX → OAK Jul 25, 19:00 UTCJul 25, 21:50 UTC2h 50m
2026-07-25 SWA4084 SMF → DAL Jul 25, 15:40 UTCJul 25, 18:00 UTC2h 20m
2026-07-25 SWA4084 SMF → DAL Jul 25, 13:00 UTCJul 25, 14:45 UTC1h 45m
2026-07-24 SWA4244 STL → TPA Jul 24, 21:20 UTCJul 25, 00:50 UTC3h 30m
2026-07-24 SWA4244 STL → TPA Jul 24, 21:19 UTCJul 25, 00:51 UTC3h 32m
2026-07-24 SWA2488 SFO → LAS Jul 24, 19:10 UTCJul 24, 20:00 UTC50m
2026-07-24 SWA4958 LGA → BNA Jul 24, 17:10 UTCJul 24, 18:10 UTC1h 0m
2026-07-24 SWA4958 LGA → BNA Jul 24, 17:09 UTCJul 24, 18:06 UTC57m
2026-07-24 SWA3209 OAK → LAS Jul 24, 14:35 UTCJul 24, 16:10 UTC1h 35m
2026-07-24 SWA471 OAK → ONT Jul 24, 12:15 UTCJul 24, 13:25 UTC1h 10m
2026-07-24 SWA596 ISP → BNA Jul 24, 07:25 UTCJul 24, 08:30 UTC1h 5m
2026-07-24 SWA596 ISP → BNA Jul 24, 07:24 UTCJul 24, 08:30 UTC1h 6m
2026-07-24 SWA596 ISP → BNA Jul 24, 03:10 UTCJul 24, 06:25 UTC3h 15m
2026-07-24 SWA596 ISP → BNA Jul 24, 00:20 UTCJul 24, 01:00 UTC40m
2026-07-23 SWA449 MKE → DEN Jul 23, 21:25 UTCJul 23, 23:10 UTC1h 45m
2026-07-23 SWA542 BNA → PHL Jul 23, 19:15 UTCJul 23, 20:20 UTC1h 5m
2026-07-23 SWA542 BNA → PHL Jul 23, 19:10 UTCJul 23, 20:16 UTC1h 6m
2026-07-23 SWA4472 MSY → TPA Jul 23, 15:55 UTCJul 23, 18:00 UTC2h 5m
2026-07-23 SWA2731 SJC → DEN Jul 23, 13:00 UTCJul 23, 14:35 UTC1h 35m
2026-07-23 SWA1008 SAN → DAL Jul 23, 11:05 UTCJul 23, 11:55 UTC50m
2026-07-23 SWA1414 HOU → LGA Jul 23, 04:45 UTCJul 23, 06:00 UTC1h 15m
2026-07-23 SWA1521 EUG → SJC Jul 23, 01:55 UTCJul 23, 03:30 UTC1h 35m
2026-07-22 SWA2632 ONT → DEN Jul 22, 20:10 UTCJul 23, 00:15 UTC4h 5m
2026-07-22 SWA2632 ONT → DEN Jul 22, 20:05 UTCJul 23, 00:17 UTC4h 12m
2026-07-22 SWA463 SJC → BUR Jul 22, 17:10 UTCJul 22, 18:50 UTC1h 40m
2026-07-22 SWA463 SJC → BUR Jul 22, 15:35 UTCJul 22, 16:15 UTC40m
2026-07-22 SWA1528 HOU → VPS Jul 22, 12:10 UTCJul 22, 13:36 UTC1h 26m
2026-07-22 SWA1528 HOU → VPS Jul 22, 12:10 UTCJul 22, 13:15 UTC1h 5m
2026-07-22 SWA4880 ATL → STL Jul 22, 02:15 UTCJul 22, 03:25 UTC1h 10m
2026-07-21 SWA3236 MCO → STL Jul 21, 22:55 UTCJul 22, 01:00 UTC2h 5m
2026-07-21 SWA4959 MCI → DCA Jul 21, 19:55 UTCJul 21, 20:50 UTC55m
2026-07-21 SWA4959 MCI → DCA Jul 21, 18:10 UTCJul 21, 18:20 UTC10m
2026-07-21 SWA4959 MCI → DCA Jul 21, 18:08 UTCJul 21, 20:41 UTC2h 33m
2026-07-21 SWA4443 MCO → PVD Jul 21, 16:35 UTCJul 21, 16:55 UTC20m
2026-07-21 SWA4443 MCO → PVD Jul 21, 12:55 UTCJul 21, 15:00 UTC2h 5m
2026-07-21 SWA3622 TPA → MHT Jul 21, 04:55 UTCJul 21, 09:15 UTC4h 20m
2026-07-21 SWA3170 TPA → IND Jul 21, 01:35 UTCJul 21, 02:35 UTC1h 0m
2026-07-21 SWA3170 TPA → IND Jul 21, 01:32 UTCJul 21, 02:31 UTC59m
2026-07-20 SWA3808 DEN → BZN Jul 20, 23:25 UTCJul 21, 00:25 UTC59m
2026-07-20 SWA3547 OAK → BUR Jul 20, 21:20 UTCJul 20, 22:30 UTC1h 10m

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 Jul 26, 21:15 UTC.
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, SWA1355, SWA596, SWA4529.