Apparatus

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sensors Mode-S transponder

AC47DE

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8901Q · BOEING 737 MAX 8 · operated by SOUTHWEST AIRLINES CO

Hex
AC47DE
Octal
53043736
Decimal
11,290,590
Country
US
Tail
N8901Q
Type
B38M
Transponder active on ground
Flights observed
760
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:10 UTC

Last known position

Most recent position reported by Mode-S AC47DE.

Country allocation

The ICAO 24-bit address AC47DE 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
SWA29 Southwest Airlines 6 2026-05-15
SWA1195 Southwest Airlines 6 2026-07-21
SWA2555 - 5 2026-07-09
SWA2266 - 5 2026-07-05
SWA2736 Southwest Airlines 4 2026-05-16
SWA2731 Southwest Airlines 4 2026-06-07
SWA2705 Southwest Airlines 4 2026-06-04
SWA2680 Southwest Airlines 4 2026-05-21
SWA2570 Southwest Airlines 4 2026-06-05
SWA2375 Southwest Airlines 4 2026-06-03
SWA2044 Southwest Airlines 4 2026-07-23
SWA199 Southwest Airlines 4 2026-07-21
SWA1970 Southwest Airlines 4 2026-05-28
SWA1734 - 4 2026-07-03
SWA930 Southwest Airlines 3 2026-05-16
SWA910 Southwest Airlines 3 2026-06-10
SWA752 Southwest Airlines 3 2026-04-21
SWA4684 Southwest Airlines 3 2026-07-25
SWA455 Southwest Airlines 3 2026-05-20
SWA424 - 3 2026-07-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA4234 PSP → OAK Jul 26, 17:40 UTCJul 26, 21:05 UTC3h 25m
2026-07-26 SWA1218 ORD → AUS Jul 26, 13:45 UTCJul 26, 16:25 UTC2h 40m
2026-07-26 SWA1218 ORD → AUS Jul 26, 11:15 UTCJul 26, 12:45 UTC1h 30m
2026-07-26 SWA4127 BWI → ORF Jul 26, 01:35 UTCJul 26, 03:00 UTC1h 25m
2026-07-25 SWA4127 BWI → ORF Jul 25, 23:45 UTCJul 26, 00:45 UTC1h 0m
2026-07-25 SWA3594 OAK → LAS Jul 25, 20:45 UTCJul 25, 21:55 UTC1h 10m
2026-07-25 SWA3594 OAK → LAS Jul 25, 20:42 UTCJul 25, 21:56 UTC1h 15m
2026-07-25 SWA4468 AUS → PHX Jul 25, 17:50 UTCJul 25, 19:35 UTC1h 45m
2026-07-25 SWA3367 OAK → ABQ Jul 25, 14:30 UTCJul 25, 16:35 UTC2h 5m
2026-07-25 SWA2341 RNO → SAN Jul 25, 10:25 UTCJul 25, 13:20 UTC2h 55m
2026-07-25 SWA4684 DEN → SFO Jul 25, 01:45 UTCJul 25, 03:45 UTC2h 0m
2026-07-25 SWA4684 DEN → SFO Jul 25, 01:44 UTCJul 25, 03:41 UTC1h 58m
2026-07-24 SWA4684 DEN → SFO Jul 24, 22:35 UTCJul 25, 00:15 UTC1h 40m
2026-07-24 SWA553 DCA → ATL Jul 24, 19:45 UTCJul 24, 21:30 UTC1h 45m
2026-07-24 SWA553 DCA → ATL Jul 24, 19:43 UTCJul 24, 21:24 UTC1h 41m
2026-07-24 SWA4312 SJC → SEA Jul 24, 16:50 UTCJul 24, 18:40 UTC1h 50m
2026-07-24 SWA523 DAL → BNA Jul 24, 13:30 UTCJul 24, 15:35 UTC2h 5m
2026-07-24 SWA2801 DEN → MEM Jul 24, 10:30 UTCJul 24, 12:00 UTC1h 30m
2026-07-24 SWA2801 DEN → MEM Jul 24, 10:26 UTCJul 24, 11:58 UTC1h 32m
2026-07-24 SWA4035 LAS → OMA Jul 24, 03:15 UTCJul 24, 05:30 UTC2h 15m
2026-07-24 SWA2140 MDW → DCA Jul 24, 00:35 UTCJul 24, 02:25 UTC1h 50m
2026-07-23 SWA927 BWI → MSY Jul 23, 21:20 UTCJul 23, 23:20 UTC2h 0m
2026-07-23 SWA2096 OAK → LAS Jul 23, 18:45 UTCJul 23, 19:45 UTC1h 0m
2026-07-23 SWA2096 OAK → LAS Jul 23, 15:55 UTCJul 23, 17:20 UTC1h 25m
2026-07-23 SWA1182 BWI → BOS Jul 23, 11:35 UTCJul 23, 14:50 UTC3h 15m
2026-07-23 SWA2044 LGB → OAK Jul 23, 03:45 UTCJul 23, 05:45 UTC2h 0m
2026-07-23 SWA2044 LGB → OAK Jul 23, 03:43 UTCJul 23, 05:43 UTC2h 0m
2026-07-22 SWA3532 SJC → OGG Jul 22, 21:25 UTCJul 23, 00:55 UTC3h 30m
2026-07-22 SWA1242 - Jul 22, 19:15 UTCJul 22, 20:15 UTC1h 0m
2026-07-22 SWA1561 BOS → BWI Jul 22, 16:25 UTCJul 22, 17:50 UTC1h 25m
2026-07-22 SWA3195 ONT → OAK Jul 22, 12:50 UTCJul 22, 15:00 UTC2h 10m
2026-07-21 SWA199 SJC → BUR Jul 21, 06:20 UTCJul 21, 08:00 UTC1h 40m
2026-07-21 SWA199 SJC → BUR Jul 21, 06:16 UTCJul 21, 07:54 UTC1h 38m
2026-07-21 SWA1195 KOA → SJC Jul 21, 04:00 UTCJul 21, 05:10 UTC1h 10m
2026-07-21 SWA1195 KOA → SJC Jul 21, 03:58 UTCJul 21, 05:13 UTC1h 16m
2026-07-21 SWA1195 KOA → SJC Jul 21, 01:10 UTCJul 21, 03:00 UTC1h 50m
2026-07-20 SWA3912 SAN → OAK Jul 20, 22:05 UTCJul 20, 23:55 UTC1h 50m
2026-07-20 SWA4642 - Jul 20, 18:35 UTCJul 20, 20:15 UTC1h 40m
2026-07-20 SWA2833 - Jul 20, 15:15 UTCJul 20, 17:25 UTC2h 10m
2026-07-20 SWA3066 OAK → PHX Jul 20, 12:21 UTCJul 20, 13:56 UTC1h 35m
2026-07-20 SWA3066 OAK → PHX Jul 20, 12:25 UTCJul 20, 14:00 UTC1h 35m
2026-07-20 843 - Jul 20, 04:10 UTCJul 20, 07:05 UTC2h 55m
2026-07-20 843 - Jul 20, 00:50 UTCJul 20, 02:35 UTC1h 45m
2026-07-19 SWA2850 LAX → PDX Jul 19, 22:35 UTCJul 19, 23:40 UTC1h 5m
2026-07-19 SWA2904 - Jul 19, 20:15 UTCJul 19, 21:15 UTC1h 0m
2026-07-19 SWA2367 SFO → LAS Jul 19, 17:10 UTCJul 19, 19:00 UTC1h 50m
2026-07-19 SWA3910 STL → DEN Jul 19, 14:15 UTCJul 19, 16:00 UTC1h 45m
2026-07-19 SWA1756 DEN → STL Jul 19, 01:55 UTCJul 19, 03:35 UTC1h 40m
2026-07-18 SWA3147 LGB → SJC Jul 18, 22:35 UTCJul 19, 00:30 UTC1h 55m
2026-07-18 SWA3147 LGB → SJC Jul 18, 22:35 UTCJul 19, 00:21 UTC1h 46m

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 N8901Q page for operator, model, and routing details .

Mode-S AC47DE frequently asked

What is Mode-S code AC47DE?
AC47DE is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8901Q.
Where is Mode-S AC47DE registered?
Mode-S code AC47DE 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 AC47DE broadcasting right now?
Mode-S AC47DE is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC47DE, octal 53043736, decimal 11,290,590.
What flights does AC47DE operate?
Mode-S AC47DE has broadcast 20 distinct callsigns, including SWA29, SWA1195, SWA2555, SWA2266, SWA2736.