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sensors Mode-S transponder

A2C9EC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N279WN · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
A2C9EC
Octal
50544754
Decimal
10,668,524
Country
US
Tail
N279WN
Type
B737
Transponder active on ground
Flights observed
654
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A2C9EC.

Country allocation

The ICAO 24-bit address A2C9EC 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
SWA2586 Southwest Airlines 6 2026-05-02
SWA106 - 6 2026-07-11
SWA2223 Southwest Airlines 5 2026-05-29
SWA1655 Southwest Airlines 5 2026-06-09
SWA1423 - 5 2026-06-17
SWA1264 Southwest Airlines 5 2026-04-16
SWA1223 - 5 2026-04-13
SWA859 Southwest Airlines 4 2026-06-10
SWA635 - 4 2026-07-09
SWA57 Southwest Airlines 4 2026-04-20
SWA3747 Southwest Airlines 4 2026-06-20
SWA2723 - 4 2026-04-13
SWA244 Southwest Airlines 4 2026-05-02
SWA2042 Southwest Airlines 4 2026-05-11
SWA1706 Southwest Airlines 4 2026-05-22
SWA934 Southwest Airlines 3 2026-06-19
SWA9001 - 3 2026-06-14
SWA868 - 3 2026-07-14
SWA786 - 3 2026-07-09
SWA760 - 3 2026-06-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SWA868 - Jul 14, 02:35 UTCJul 14, 05:00 UTC2h 25m
2026-07-13 SWA868 - Jul 13, 20:00 UTCJul 14, 00:55 UTC4h 55m
2026-07-13 SWA868 - Jul 13, 17:35 UTCJul 13, 18:50 UTC1h 15m
2026-07-13 SWA1003 - Jul 13, 15:40 UTCJul 13, 16:40 UTC1h 0m
2026-07-13 SWA4904 - Jul 13, 14:00 UTCJul 13, 14:40 UTC40m
2026-07-13 SWA4904 ORF → BWI Jul 13, 13:59 UTCJul 13, 14:37 UTC39m
2026-07-13 SWA1035 - Jul 13, 12:25 UTCJul 13, 13:05 UTC40m
2026-07-13 SWA4612 - Jul 13, 10:00 UTCJul 13, 11:20 UTC1h 20m
2026-07-13 SWA4612 SDF → BWI Jul 13, 09:56 UTCJul 13, 11:07 UTC1h 11m
2026-07-13 SWA671 - Jul 13, 03:05 UTCJul 13, 03:30 UTC25m
2026-07-13 SWA671 BNA → SDF Jul 13, 03:01 UTCJul 13, 03:34 UTC33m
2026-07-12 SWA3628 - Jul 12, 23:30 UTCJul 13, 00:40 UTC1h 10m
2026-07-12 SWA418 STL → VPS Jul 12, 21:15 UTCJul 12, 22:35 UTC1h 20m
2026-07-12 SWA418 STL → VPS Jul 12, 21:11 UTCJul 12, 22:36 UTC1h 25m
2026-07-12 SWA4742 SAV → STL Jul 12, 18:26 UTCJul 12, 20:02 UTC1h 36m
2026-07-12 SWA4742 SAV → STL Jul 12, 18:30 UTCJul 12, 20:10 UTC1h 40m
2026-07-12 SWA4319 BNA → SAV Jul 12, 16:20 UTCJul 12, 17:20 UTC1h 0m
2026-07-12 SWA4319 BNA → SAV Jul 12, 16:16 UTCJul 12, 17:15 UTC59m
2026-07-12 SWA4319 AUS → BNA Jul 12, 13:20 UTCJul 12, 15:05 UTC1h 45m
2026-07-12 SWA2600 MCO → AUS Jul 12, 02:15 UTCJul 12, 04:20 UTC2h 5m
2026-07-11 SWA106 - Jul 11, 22:55 UTCJul 12, 01:15 UTC2h 20m
2026-07-11 SWA106 SAT → MCO Jul 11, 22:55 UTCJul 12, 01:12 UTC2h 17m
2026-07-11 SWA106 - Jul 11, 21:15 UTCJul 11, 21:55 UTC40m
2026-07-11 SWA106 - Jul 11, 18:40 UTCJul 11, 20:10 UTC1h 30m
2026-07-11 SWA106 - Jul 11, 16:05 UTCJul 11, 17:40 UTC1h 35m
2026-07-11 SWA106 SMF → LAX Jul 11, 13:35 UTCJul 11, 14:45 UTC1h 10m
2026-07-11 SWA136 DEN → SMF Jul 11, 04:35 UTCJul 11, 06:45 UTC2h 10m
2026-07-11 SWA1303 DAL → DEN Jul 11, 00:40 UTCJul 11, 02:45 UTC2h 5m
2026-07-10 SWA1303 OKC → DAL Jul 10, 22:35 UTCJul 10, 23:15 UTC40m
2026-07-10 SWA4400 - Jul 10, 20:45 UTCJul 10, 21:40 UTC55m
2026-07-10 SWA4400 HOU → OKC Jul 10, 20:40 UTCJul 10, 21:36 UTC56m
2026-07-10 SWA4468 - Jul 10, 16:50 UTCJul 10, 18:55 UTC2h 5m
2026-07-10 SWA411 - Jul 10, 13:45 UTCJul 10, 15:45 UTC2h 0m
2026-07-10 SWA411 DEN → AUS Jul 10, 11:10 UTCJul 10, 12:50 UTC1h 40m
2026-07-10 SWA2418 - Jul 10, 03:25 UTCJul 10, 05:20 UTC1h 55m
2026-07-10 SWA2418 - Jul 10, 01:25 UTCJul 10, 02:15 UTC50m
2026-07-09 SWA2418 - Jul 9, 20:55 UTCJul 9, 23:50 UTC2h 55m
2026-07-09 SWA786 - Jul 9, 17:20 UTCJul 9, 19:35 UTC2h 15m
2026-07-09 SWA786 BUR → LAS Jul 9, 15:30 UTCJul 9, 16:15 UTC45m
2026-07-09 SWA4843 SJC → BUR Jul 9, 13:37 UTCJul 9, 14:23 UTC46m
2026-07-09 SWA4843 SJC → BUR Jul 9, 13:40 UTCJul 9, 14:25 UTC45m
2026-07-09 SWA635 SEA → SJC Jul 9, 02:35 UTCJul 9, 04:10 UTC1h 35m
2026-07-09 SWA635 BNA → PHX Jul 9, 02:31 UTCJul 9, 04:09 UTC1h 38m
2026-07-08 SWA3585 PHX → SEA Jul 8, 22:35 UTCJul 9, 01:10 UTC2h 35m
2026-07-08 SWA1594 - Jul 8, 19:25 UTCJul 8, 21:30 UTC2h 5m
2026-07-08 SWA1594 - Jul 8, 16:55 UTCJul 8, 18:10 UTC1h 15m
2026-07-08 SWA1473 BNA → MDW Jul 8, 14:35 UTCJul 8, 15:35 UTC1h 0m
2026-07-08 SWA1473 - Jul 8, 12:25 UTCJul 8, 13:30 UTC1h 5m
2026-07-08 SWA482 - Jul 8, 01:50 UTCJul 8, 02:45 UTC55m
2026-07-07 SWA3341 - Jul 7, 22:45 UTCJul 7, 23:50 UTC1h 5m

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 N279WN page for operator, model, and routing details .

Mode-S A2C9EC frequently asked

What is Mode-S code A2C9EC?
A2C9EC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N279WN.
Where is Mode-S A2C9EC registered?
Mode-S code A2C9EC 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 A2C9EC broadcasting right now?
Mode-S A2C9EC 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 A2C9EC, octal 50544754, decimal 10,668,524.
What flights does A2C9EC operate?
Mode-S A2C9EC has broadcast 20 distinct callsigns, including SWA2586, SWA106, SWA2223, SWA1655, SWA1423.