Apparatus

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sensors Mode-S transponder

A211EF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N232WN · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
A211EF
Octal
50410757
Decimal
10,621,423
Country
US
Tail
N232WN
Type
B737
No current signal · last broadcast 1h ago
Flights observed
671
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A211EF.

Country allocation

The ICAO 24-bit address A211EF 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
SWA428 Southwest Airlines 9 2026-04-16
SWA2970 Southwest Airlines 7 2026-04-26
SWA4675 Southwest Airlines 6 2026-05-25
SWA1665 Southwest Airlines 6 2026-06-15
SWA957 Southwest Airlines 5 2026-04-26
SWA576 Southwest Airlines 5 2026-05-21
SWA3523 Southwest Airlines 5 2026-05-28
SWA3142 Southwest Airlines 5 2026-04-16
SWA1198 Southwest Airlines 5 2026-05-28
SWA1147 - 5 2026-06-13
SWA882 - 4 2026-07-14
SWA4523 - 4 2026-07-06
SWA4245 Southwest Airlines 4 2026-06-23
SWA4128 Southwest Airlines 4 2026-05-13
SWA4055 Southwest Airlines 4 2026-04-21
SWA3472 Southwest Airlines 4 2026-05-07
SWA3438 Southwest Airlines 4 2026-05-14
SWA2673 - 4 2026-07-13
SWA257 Southwest Airlines 4 2026-06-07
SWA2288 Southwest Airlines 4 2026-05-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SWA3842 - Jul 14, 03:15 UTCJul 14, 03:45 UTC30m
2026-07-14 SWA882 - Jul 14, 00:50 UTCJul 14, 01:55 UTC1h 5m
2026-07-13 SWA882 PHX → ABQ Jul 13, 23:10 UTCJul 14, 00:10 UTC1h 0m
2026-07-13 SWA4138 LAS → PHX Jul 13, 21:22 UTCJul 13, 22:11 UTC49m
2026-07-13 SWA4138 LAS → PHX Jul 13, 21:25 UTCJul 13, 22:15 UTC50m
2026-07-13 SWA2673 - Jul 13, 17:05 UTCJul 13, 19:20 UTC2h 15m
2026-07-13 SWA2673 OMA → LAS Jul 13, 17:00 UTCJul 13, 19:16 UTC2h 17m
2026-07-13 SWA2673 - Jul 13, 13:35 UTCJul 13, 16:15 UTC2h 40m
2026-07-13 SWA2673 ORF → MCO Jul 13, 10:35 UTCJul 13, 12:05 UTC1h 30m
2026-07-13 SWA3214 BNA → ORF Jul 13, 02:05 UTCJul 13, 03:25 UTC1h 20m
2026-07-13 SWA3214 BNA → ORF Jul 13, 02:06 UTCJul 13, 03:13 UTC1h 7m
2026-07-12 SWA2264 - Jul 12, 23:40 UTCJul 13, 00:50 UTC1h 10m
2026-07-12 SWA2264 - Jul 12, 20:15 UTCJul 12, 22:40 UTC2h 25m
2026-07-12 SWA2416 - Jul 12, 14:35 UTCJul 12, 18:05 UTC3h 30m
2026-07-12 SWA2735 - Jul 12, 11:40 UTCJul 12, 13:30 UTC1h 50m
2026-07-12 SWA1852 - Jul 12, 00:30 UTCJul 12, 02:25 UTC1h 55m
2026-07-12 SWA1852 FLL → BNA Jul 12, 00:29 UTCJul 12, 02:16 UTC1h 47m
2026-07-11 SWA121 - Jul 11, 20:00 UTCJul 11, 22:45 UTC2h 45m
2026-07-11 SWA254 - Jul 11, 17:50 UTCJul 11, 18:55 UTC1h 5m
2026-07-11 SWA1806 - Jul 11, 14:45 UTCJul 11, 16:45 UTC2h 0m
2026-07-11 SWA1806 - Jul 11, 13:25 UTCJul 11, 13:55 UTC30m
2026-07-11 SWA301 - Jul 11, 11:30 UTCJul 11, 12:05 UTC35m
2026-07-11 SWA1481 - Jul 11, 03:45 UTCJul 11, 05:40 UTC1h 55m
2026-07-11 SWA2573 AUS → DEN Jul 11, 00:25 UTCJul 11, 02:40 UTC2h 15m
2026-07-10 SWA1285 LAS → AUS Jul 10, 20:45 UTCJul 10, 23:00 UTC2h 15m
2026-07-10 SWA1285 SMF → LAS Jul 10, 18:15 UTCJul 10, 19:20 UTC1h 5m
2026-07-10 SWA3868 - Jul 10, 15:50 UTCJul 10, 16:55 UTC1h 5m
2026-07-10 SWA3715 - Jul 10, 14:15 UTCJul 10, 14:55 UTC40m
2026-07-10 SWA4422 SBA → LAS Jul 10, 12:15 UTCJul 10, 13:05 UTC50m
2026-07-10 SWA4422 SBA → LAS Jul 10, 12:14 UTCJul 10, 13:02 UTC48m
2026-07-10 SWA3842 - Jul 10, 04:05 UTCJul 10, 06:15 UTC2h 10m
2026-07-10 SWA882 ABQ → DEN Jul 10, 02:05 UTCJul 10, 03:00 UTC55m
2026-07-09 SWA882 - Jul 9, 23:15 UTCJul 10, 00:40 UTC1h 25m
2026-07-09 SWA1230 COS → PHX Jul 9, 20:40 UTCJul 9, 22:05 UTC1h 25m
2026-07-09 SWA1230 - Jul 9, 17:35 UTCJul 9, 19:40 UTC2h 5m
2026-07-09 SWA4345 MSP → MDW Jul 9, 15:35 UTCJul 9, 16:35 UTC1h 0m
2026-07-09 SWA4345 MSP → MDW Jul 9, 15:34 UTCJul 9, 16:40 UTC1h 6m
2026-07-09 SWA3961 STL → MSP Jul 9, 13:35 UTCJul 9, 14:40 UTC1h 5m
2026-07-09 SWA3435 RDU → STL Jul 9, 10:34 UTCJul 9, 12:19 UTC1h 45m
2026-07-09 SWA793 BWI → RDU Jul 9, 00:10 UTCJul 9, 01:00 UTC50m
2026-07-08 SWA209 ATL → BWI Jul 8, 21:55 UTCJul 8, 23:20 UTC1h 25m
2026-07-08 SWA209 ATL → LAS Jul 8, 21:55 UTCJul 8, 23:18 UTC1h 23m
2026-07-08 SWA447 - Jul 8, 01:45 UTCJul 8, 02:20 UTC35m
2026-07-07 SWA2606 MCO → BNA Jul 7, 21:05 UTCJul 7, 22:40 UTC1h 35m
2026-07-07 SWA2606 MCO → BNA Jul 7, 21:03 UTCJul 7, 22:30 UTC1h 27m
2026-07-07 SWA908 CLE → MCO Jul 7, 17:45 UTCJul 7, 20:00 UTC2h 15m
2026-07-07 SWA908 STL → CLE Jul 7, 15:40 UTCJul 7, 16:45 UTC1h 5m
2026-07-07 SWA2087 - Jul 7, 12:35 UTCJul 7, 14:10 UTC1h 35m
2026-07-07 SWA2087 JAX → STL Jul 7, 12:30 UTCJul 7, 14:06 UTC1h 36m
2026-07-07 SWA4797 - Jul 7, 02:55 UTCJul 7, 04:40 UTC1h 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 N232WN page for operator, model, and routing details .

Mode-S A211EF frequently asked

What is Mode-S code A211EF?
A211EF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N232WN.
Where is Mode-S A211EF registered?
Mode-S code A211EF 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 A211EF broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A211EF, octal 50410757, decimal 10,621,423.
What flights does A211EF operate?
Mode-S A211EF has broadcast 20 distinct callsigns, including SWA428, SWA2970, SWA4675, SWA1665, SWA957.