Apparatus

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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
Broadcasting now · callsign SWA1343 · 41,000 ft
Flights observed
755
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 23:00 UTC

Current position

A2C9EC is currently broadcasting. Map zoomed to live position.

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
SWA3341 Southwest Airlines 6 2026-07-22
SWA2586 Southwest Airlines 6 2026-05-02
SWA106 - 6 2026-07-11
SWA1037 Southwest Airlines 6 2026-07-25
SWA868 - 5 2026-07-14
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
SWA500 - 4 2026-07-21
SWA4389 Southwest Airlines 4 2026-07-21
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

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA805 LAX → SFO Jul 26, 22:00 UTCJul 26, 22:55 UTC55m
2026-07-26 SWA3306 BWI → MSY Jul 26, 17:25 UTCJul 26, 20:45 UTC3h 20m
2026-07-26 SWA3306 BWI → MSY Jul 26, 17:21 UTCJul 26, 20:46 UTC3h 25m
2026-07-26 SWA2368 BWI → LGA Jul 26, 13:45 UTCJul 26, 16:25 UTC2h 40m
2026-07-26 SWA2850 LAX → PDX Jul 26, 01:45 UTCJul 26, 04:05 UTC2h 20m
2026-07-25 SWA2850 LAX → PDX Jul 25, 22:50 UTCJul 26, 00:35 UTC1h 45m
2026-07-25 SWA3062 LGB → OAK Jul 25, 19:00 UTCJul 25, 21:55 UTC2h 55m
2026-07-25 SWA3062 LGB → OAK Jul 25, 18:59 UTCJul 25, 21:52 UTC2h 53m
2026-07-25 SWA3062 LGB → OAK Jul 25, 16:55 UTCJul 25, 17:55 UTC1h 0m
2026-07-25 SWA4947 LAS → IND Jul 25, 15:00 UTCJul 25, 15:50 UTC50m
2026-07-25 SWA1037 PVD → BWI Jul 25, 01:22 UTCJul 25, 03:29 UTC2h 7m
2026-07-25 SWA1037 PVD → BWI Jul 25, 01:25 UTCJul 25, 03:30 UTC2h 5m
2026-07-24 SWA1037 PVD → BWI Jul 24, 20:35 UTCJul 25, 00:05 UTC3h 30m
2026-07-24 SWA1037 PVD → BWI Jul 24, 18:20 UTCJul 24, 18:55 UTC35m
2026-07-24 SWA1037 PVD → BWI Jul 24, 15:20 UTCJul 24, 17:20 UTC2h 0m
2026-07-24 SWA1037 PVD → BWI Jul 24, 12:45 UTCJul 24, 14:20 UTC1h 35m
2026-07-24 SWA2153 ATL → LGA Jul 24, 10:30 UTCJul 24, 11:20 UTC50m
2026-07-24 SWA1992 OAK → LAS Jul 24, 02:30 UTCJul 24, 03:10 UTC40m
2026-07-24 SWA1992 OAK → LAS Jul 24, 02:25 UTCJul 24, 03:22 UTC57m
2026-07-24 SWA4704 MHT → BWI Jul 24, 00:30 UTCJul 24, 01:15 UTC45m
2026-07-23 SWA1984 SJC → BOI Jul 23, 22:50 UTCJul 23, 23:35 UTC45m
2026-07-23 SWA1984 SJC → BOI Jul 23, 22:49 UTCJul 23, 23:35 UTC46m
2026-07-23 SWA1544 KOA → OAK Jul 23, 18:40 UTCJul 23, 20:40 UTC2h 0m
2026-07-23 SWA247 PVD → MDW Jul 23, 16:10 UTCJul 23, 17:30 UTC1h 20m
2026-07-23 SWA247 PVD → MDW Jul 23, 16:07 UTCJul 23, 17:31 UTC1h 24m
2026-07-23 SWA2125 SNA → DEN Jul 23, 11:25 UTCJul 23, 14:50 UTC3h 25m
2026-07-23 SWA2125 SNA → DEN Jul 23, 11:20 UTCJul 23, 14:43 UTC3h 23m
2026-07-23 SWA539 BOS → BWI Jul 23, 01:35 UTCJul 23, 02:15 UTC40m
2026-07-23 SWA539 BOS → BWI Jul 23, 01:30 UTCJul 23, 02:11 UTC41m
2026-07-22 SWA3341 DEN → SNA Jul 22, 23:25 UTCJul 23, 00:30 UTC1h 5m
2026-07-22 SWA3341 DEN → SNA Jul 22, 23:21 UTCJul 23, 00:25 UTC1h 4m
2026-07-22 SWA3341 DEN → SNA Jul 22, 20:35 UTCJul 22, 22:10 UTC1h 35m
2026-07-22 SWA3281 BWI → BDL Jul 22, 17:05 UTCJul 22, 18:30 UTC1h 25m
2026-07-22 SWA3281 BWI → BDL Jul 22, 17:03 UTCJul 22, 18:29 UTC1h 26m
2026-07-22 SWA1540 DAL → AMA Jul 22, 14:45 UTCJul 22, 16:05 UTC1h 20m
2026-07-22 SWA1540 DAL → AMA Jul 22, 12:30 UTCJul 22, 13:35 UTC1h 5m
2026-07-21 SWA2567 SJC → SNA Jul 21, 23:50 UTCJul 22, 02:40 UTC2h 50m
2026-07-21 SWA2567 SJC → SNA Jul 21, 23:46 UTCJul 22, 02:35 UTC2h 49m
2026-07-21 SWA500 DEN → LAX Jul 21, 20:45 UTCJul 21, 22:37 UTC1h 53m
2026-07-21 SWA500 - Jul 21, 20:50 UTCJul 21, 22:40 UTC1h 50m
2026-07-21 SWA500 BNA → DEN Jul 21, 17:30 UTCJul 21, 19:45 UTC2h 15m
2026-07-21 SWA500 BUF → BNA Jul 21, 14:35 UTCJul 21, 16:25 UTC1h 50m
2026-07-21 SWA771 SJC → SAN Jul 21, 11:25 UTCJul 21, 13:45 UTC2h 20m
2026-07-21 SWA771 SJC → SAN Jul 21, 11:21 UTCJul 21, 13:44 UTC2h 23m
2026-07-21 SWA2173 SJC → SEA Jul 21, 02:35 UTCJul 21, 04:00 UTC1h 25m
2026-07-21 SWA4389 PHX → HOU Jul 21, 00:45 UTCJul 21, 01:25 UTC40m
2026-07-21 SWA4389 PHX → HOU Jul 21, 00:44 UTCJul 21, 01:21 UTC37m
2026-07-20 SWA4389 PHX → HOU Jul 20, 22:45 UTCJul 21, 00:05 UTC1h 19m
2026-07-20 SWA4389 PHX → HOU Jul 20, 21:00 UTCJul 20, 21:50 UTC50m
2026-07-20 SWA2451 - Jul 20, 19:15 UTCJul 20, 19:55 UTC40m

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?
Yes. Mode-S A2C9EC is currently airborne.
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 SWA3341, SWA2586, SWA106, SWA1037, SWA868.