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sensors Mode-S transponder

A1FD03

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N227WN · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
A1FD03
Octal
50376403
Decimal
10,616,067
Country
US
Tail
N227WN
Type
B737
No current signal · last broadcast 2h ago
Flights observed
674
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S A1FD03.

Country allocation

The ICAO 24-bit address A1FD03 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
SWA3743 - 8 2026-06-23
SWA1149 Southwest Airlines 8 2026-05-23
SWA19 - 7 2026-06-26
SWA834 - 6 2026-07-02
SWA4516 - 6 2026-07-03
SWA264 Southwest Airlines 6 2026-06-12
SWA9003 - 5 2026-06-24
SWA250 Southwest Airlines 5 2026-05-10
SWA1707 Southwest Airlines 5 2026-05-29
SWA1315 Southwest Airlines 5 2026-05-09
SWA1091 Southwest Airlines 5 2026-04-28
SWA693 Southwest Airlines 4 2026-05-28
SWA4576 Southwest Airlines 4 2026-04-15
SWA4264 Southwest Airlines 4 2026-06-02
SWA4128 Southwest Airlines 4 2026-05-20
SWA375 - 4 2026-06-18
SWA371 - 4 2026-07-02
SWA3661 Southwest Airlines 4 2026-04-22
SWA345 - 4 2026-06-23
SWA3199 Southwest Airlines 4 2026-05-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 SWA2460 - Jul 13, 22:55 UTCJul 14, 02:05 UTC3h 10m
2026-07-13 SWA2294 - Jul 13, 19:00 UTCJul 13, 21:30 UTC2h 30m
2026-07-13 SWA2294 - Jul 13, 15:20 UTCJul 13, 17:40 UTC2h 20m
2026-07-13 SWA276 - Jul 13, 11:50 UTCJul 13, 14:10 UTC2h 20m
2026-07-13 SWA4946 - Jul 13, 01:50 UTCJul 13, 04:00 UTC2h 10m
2026-07-13 SWA4946 - Jul 13, 01:40 UTCJul 13, 01:45 UTC5m
2026-07-12 SWA667 DAL → LGA Jul 12, 21:20 UTCJul 13, 00:35 UTC3h 15m
2026-07-12 SWA667 - Jul 12, 16:55 UTCJul 12, 20:05 UTC3h 10m
2026-07-12 SWA667 SMF → GEG Jul 12, 14:30 UTCJul 12, 15:50 UTC1h 20m
2026-07-12 SWA448 SLC → SMF Jul 12, 12:05 UTCJul 12, 13:25 UTC1h 20m
2026-07-12 SWA1737 DEN → SLC Jul 12, 03:01 UTCJul 12, 04:00 UTC59m
2026-07-11 SWA3568 - Jul 11, 23:20 UTCJul 12, 01:10 UTC1h 50m
2026-07-11 SWA4834 - Jul 11, 20:10 UTCJul 11, 22:25 UTC2h 15m
2026-07-11 SWA4834 MCO → SAT Jul 11, 20:09 UTCJul 11, 22:22 UTC2h 13m
2026-07-11 SWA913 - Jul 11, 17:00 UTCJul 11, 18:05 UTC1h 5m
2026-07-11 SWA913 GCM → MCO Jul 11, 16:21 UTCJul 11, 17:51 UTC1h 30m
2026-07-11 SWA3989 BWI → GCM Jul 11, 12:15 UTCJul 11, 14:30 UTC2h 15m
2026-07-11 SWA3989 BWI → GCM Jul 11, 12:14 UTCJul 11, 15:06 UTC2h 52m
2026-07-10 SWA4347 PHX → BWI Jul 10, 23:45 UTCJul 11, 03:40 UTC3h 55m
2026-07-10 SWA1230 - Jul 10, 21:00 UTCJul 10, 22:15 UTC1h 15m
2026-07-10 SWA1230 COS → PHX Jul 10, 20:56 UTCJul 10, 22:15 UTC1h 19m
2026-07-10 SWA1230 - Jul 10, 17:45 UTCJul 10, 19:55 UTC2h 10m
2026-07-10 SWA4345 MSP → MDW Jul 10, 15:35 UTCJul 10, 16:35 UTC1h 0m
2026-07-10 SWA3961 STL → MSP Jul 10, 13:35 UTCJul 10, 14:45 UTC1h 10m
2026-07-10 SWA3961 STL → MSP Jul 10, 13:33 UTCJul 10, 14:40 UTC1h 7m
2026-07-10 SWA3435 - Jul 10, 11:40 UTCJul 10, 12:25 UTC45m
2026-07-10 SWA3435 - Jul 10, 10:35 UTCJul 10, 11:35 UTC1h 0m
2026-07-09 SWA8801 - Jul 9, 22:30 UTCJul 9, 23:00 UTC30m
2026-07-09 SWA1665 DEN → ORF Jul 9, 18:05 UTCJul 9, 21:10 UTC3h 5m
2026-07-09 SWA4574 - Jul 9, 15:05 UTCJul 9, 17:00 UTC1h 55m
2026-07-09 SWA1427 BNA → LGB Jul 9, 01:00 UTCJul 9, 04:40 UTC3h 40m
2026-07-08 SWA1427 DCA → BNA Jul 8, 20:35 UTCJul 8, 22:05 UTC1h 30m
2026-07-08 SWA1185 CMH → DCA Jul 8, 18:05 UTCJul 8, 19:00 UTC55m
2026-07-08 SWA1185 CMH → DCA Jul 8, 18:05 UTCJul 8, 18:59 UTC54m
2026-07-08 SWA4427 - Jul 8, 16:10 UTCJul 8, 17:05 UTC55m
2026-07-08 SWA724 SEA → SJC Jul 8, 13:00 UTCJul 8, 15:10 UTC2h 10m
2026-07-08 SWA1374 - Jul 8, 00:50 UTCJul 8, 02:40 UTC1h 50m
2026-07-07 SWA2717 - Jul 7, 20:25 UTCJul 7, 21:50 UTC1h 25m
2026-07-07 SWA2717 - Jul 7, 18:15 UTCJul 7, 19:15 UTC1h 0m
2026-07-07 SWA3010 OKC → AUS Jul 7, 16:20 UTCJul 7, 17:10 UTC50m
2026-07-07 SWA3010 DEN → OKC Jul 7, 14:15 UTCJul 7, 15:25 UTC1h 10m
2026-07-07 SWA2446 AUS → DEN Jul 7, 02:50 UTCJul 7, 12:35 UTC9h 45m
2026-07-06 SWA336 - Jul 6, 23:35 UTCJul 7, 01:55 UTC2h 20m
2026-07-06 SWA2901 - Jul 6, 18:40 UTCJul 6, 21:15 UTC2h 35m
2026-07-06 SWA2901 - Jul 6, 17:00 UTCJul 6, 17:50 UTC50m
2026-07-06 SWA2732 - Jul 6, 13:55 UTCJul 6, 16:00 UTC2h 5m
2026-07-06 SWA8806 - Jul 6, 11:35 UTCJul 6, 12:40 UTC1h 5m
2026-07-06 SWA3977 - Jul 6, 02:55 UTCJul 6, 05:00 UTC2h 5m
2026-07-06 SWA3977 MIA → BWI Jul 6, 02:52 UTCJul 6, 04:54 UTC2h 2m
2026-07-05 SWA4524 - Jul 5, 20:15 UTCJul 5, 23:00 UTC2h 45m

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 N227WN page for operator, model, and routing details .

Mode-S A1FD03 frequently asked

What is Mode-S code A1FD03?
A1FD03 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N227WN.
Where is Mode-S A1FD03 registered?
Mode-S code A1FD03 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 A1FD03 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1FD03, octal 50376403, decimal 10,616,067.
What flights does A1FD03 operate?
Mode-S A1FD03 has broadcast 20 distinct callsigns, including SWA3743, SWA1149, SWA19, SWA834, SWA4516.