Apparatus

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sensors Mode-S transponder

A1BF3A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N211WN · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
A1BF3A
Octal
50337472
Decimal
10,600,250
Country
US
Tail
N211WN
Type
B737
No current signal · last broadcast Jul 26, 22:10 UTC
Flights observed
746
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:10 UTC

Last known position

Most recent position reported by Mode-S A1BF3A.

Country allocation

The ICAO 24-bit address A1BF3A 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
SWA1433 Southwest Airlines 8 2026-06-29
SWA411 - 6 2026-07-13
SWA2448 Southwest Airlines 6 2026-05-18
SWA686 - 5 2026-06-27
SWA2310 Southwest Airlines 5 2026-06-05
SWA2286 - 5 2026-06-24
SWA2087 Southwest Airlines 5 2026-05-13
SWA1095 Southwest Airlines 5 2026-04-20
SWA853 - 4 2026-07-10
SWA4724 Southwest Airlines 4 2026-06-09
SWA4355 Southwest Airlines 4 2026-07-23
SWA3858 - 4 2026-07-10
SWA3528 Southwest Airlines 4 2026-04-28
SWA3414 Southwest Airlines 4 2026-05-23
SWA339 - 4 2026-06-28
SWA2718 Southwest Airlines 4 2026-04-17
SWA2705 Southwest Airlines 4 2026-06-01
SWA2570 - 4 2026-06-18
SWA2433 - 4 2026-07-02
SWA2072 Southwest Airlines 4 2026-05-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA1801 DEN → HDN Jul 26, 19:55 UTCJul 26, 22:10 UTC2h 15m
2026-07-26 SWA3383 AUS → SJC Jul 26, 15:05 UTCJul 26, 18:45 UTC3h 40m
2026-07-26 SWA3383 AUS → SJC Jul 26, 15:04 UTCJul 26, 18:47 UTC3h 43m
2026-07-26 SWA846 PHL → BNA Jul 26, 13:15 UTCJul 26, 14:10 UTC55m
2026-07-26 SWA1894 BDL → BNA Jul 26, 10:45 UTCJul 26, 11:15 UTC30m
2026-07-26 SWA3308 BWI → CLT Jul 26, 02:00 UTCJul 26, 02:30 UTC30m
2026-07-26 SWA3308 BWI → CLT Jul 26, 01:55 UTCJul 26, 02:27 UTC32m
2026-07-25 SWA1150 LAS → HNL Jul 25, 22:35 UTCJul 26, 00:20 UTC1h 45m
2026-07-25 SWA1159 MSY → LAX Jul 25, 18:15 UTCJul 25, 21:20 UTC3h 5m
2026-07-25 SWA1159 MSY → LAX Jul 25, 16:10 UTCJul 25, 17:05 UTC55m
2026-07-25 SWA1159 MSY → LAX Jul 25, 13:15 UTCJul 25, 15:00 UTC1h 45m
2026-07-25 SWA2927 MDW → AUS Jul 25, 09:55 UTCJul 25, 12:00 UTC2h 5m
2026-07-25 SWA1516 MEM → DAL Jul 25, 01:05 UTCJul 25, 01:50 UTC45m
2026-07-25 SWA1516 MEM → DAL Jul 25, 01:03 UTCJul 25, 01:43 UTC40m
2026-07-24 SWA760 LGB → SJC Jul 24, 21:50 UTCJul 24, 23:30 UTC1h 40m
2026-07-24 SWA760 LGB → SJC Jul 24, 19:30 UTCJul 24, 20:35 UTC1h 5m
2026-07-24 SWA1534 LAX → MDW Jul 24, 16:20 UTCJul 24, 18:25 UTC2h 5m
2026-07-24 SWA4653 AUS → MCI Jul 24, 13:15 UTCJul 24, 15:20 UTC2h 5m
2026-07-24 SWA1894 BDL → BNA Jul 24, 10:35 UTCJul 24, 11:10 UTC35m
2026-07-24 SWA4113 LAS → SJC Jul 24, 02:40 UTCJul 24, 03:05 UTC25m
2026-07-23 SWA4355 BUR → OAK Jul 23, 23:45 UTCJul 24, 01:30 UTC1h 45m
2026-07-23 SWA4355 BUR → OAK Jul 23, 22:00 UTCJul 23, 22:50 UTC50m
2026-07-23 SWA4355 BUR → OAK Jul 23, 18:50 UTCJul 23, 20:55 UTC2h 5m
2026-07-23 SWA4355 BUR → OAK Jul 23, 15:25 UTCJul 23, 17:30 UTC2h 5m
2026-07-23 SWA2637 ISP → BWI Jul 23, 12:15 UTCJul 23, 14:00 UTC1h 45m
2026-07-23 SWA2637 ISP → BWI Jul 23, 12:10 UTCJul 23, 13:59 UTC1h 49m
2026-07-23 SWA2129 LAS → SJC Jul 23, 09:30 UTCJul 23, 11:15 UTC1h 45m
2026-07-23 SWA4569 BWI → PVD Jul 23, 03:50 UTCJul 23, 06:05 UTC2h 15m
2026-07-22 SWA1133 SNA → SJC Jul 22, 20:30 UTCJul 23, 02:45 UTC6h 15m
2026-07-22 SWA11 DAL → HOU Jul 22, 16:45 UTCJul 22, 18:40 UTC1h 55m
2026-07-21 SWA770 - Jul 21, 23:25 UTCJul 22, 00:55 UTC1h 30m
2026-07-21 SWA770 - Jul 21, 21:55 UTCJul 21, 22:40 UTC45m
2026-07-21 SWA3392 - Jul 21, 19:45 UTCJul 21, 20:55 UTC1h 10m
2026-07-21 SWA1426 BNA → PNS Jul 21, 17:50 UTCJul 21, 18:50 UTC1h 0m
2026-07-21 SWA1426 DCA → BNA Jul 21, 15:25 UTCJul 21, 16:55 UTC1h 30m
2026-07-21 SWA2789 ONT → OAK Jul 21, 12:40 UTCJul 21, 13:50 UTC1h 10m
2026-07-21 SWA3709 PHX → SFO Jul 21, 00:55 UTCJul 21, 03:34 UTC2h 39m
2026-07-21 SWA3709 PHX → SFO Jul 21, 01:00 UTCJul 21, 03:40 UTC2h 40m
2026-07-20 SWA3709 PHX → SFO Jul 20, 21:25 UTCJul 20, 23:25 UTC2h 0m
2026-07-20 SWA452 - Jul 20, 16:10 UTCJul 20, 18:55 UTC2h 45m
2026-07-20 SWA452 SLC → HOU Jul 20, 16:08 UTCJul 20, 18:50 UTC2h 42m
2026-07-20 SWA452 DEN → SLC Jul 20, 14:00 UTCJul 20, 15:05 UTC1h 5m
2026-07-20 SWA3127 ATL → BWI Jul 20, 11:30 UTCJul 20, 12:45 UTC1h 15m
2026-07-20 SWA4587 CUN → AUS Jul 20, 03:55 UTCJul 20, 06:15 UTC2h 20m
2026-07-20 SWA4818 - Jul 20, 01:20 UTCJul 20, 02:45 UTC1h 25m
2026-07-19 SWA3064 PHX → COS Jul 19, 22:55 UTCJul 20, 00:20 UTC1h 25m
2026-07-19 SWA1300 OAK → DEN Jul 19, 02:00 UTCJul 19, 04:20 UTC2h 20m
2026-07-18 SWA1300 OAK → DEN Jul 18, 22:00 UTCJul 19, 00:50 UTC2h 50m
2026-07-18 SWA868 - Jul 18, 18:20 UTCJul 18, 20:55 UTC2h 35m
2026-07-18 SWA868 - Jul 18, 16:20 UTCJul 18, 17:15 UTC55m

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 N211WN page for operator, model, and routing details .

Mode-S A1BF3A frequently asked

What is Mode-S code A1BF3A?
A1BF3A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N211WN.
Where is Mode-S A1BF3A registered?
Mode-S code A1BF3A 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 A1BF3A broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1BF3A, octal 50337472, decimal 10,600,250.
What flights does A1BF3A operate?
Mode-S A1BF3A has broadcast 20 distinct callsigns, including SWA1433, SWA411, SWA2448, SWA686, SWA2310.