Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A1B1BC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N208WN · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
A1B1BC
Octal
50330674
Decimal
10,596,796
Country
US
Tail
N208WN
Type
B737
No current signal · last broadcast 2h ago
Flights observed
663
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S A1B1BC.

Country allocation

The ICAO 24-bit address A1B1BC 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
SWA1149 Southwest Airlines 12 2026-06-03
SWA3624 - 10 2026-07-07
SWA2444 Southwest Airlines 7 2026-05-21
SWA845 Southwest Airlines 5 2026-06-13
SWA3810 Southwest Airlines 5 2026-05-24
SWA371 - 5 2026-06-25
SWA2116 - 5 2026-07-02
SWA4318 - 4 2026-06-18
SWA4155 Southwest Airlines 4 2026-05-31
SWA369 Southwest Airlines 4 2026-05-28
SWA3245 Southwest Airlines 4 2026-04-15
SWA2201 - 4 2026-07-10
SWA2079 - 4 2026-06-21
SWA1507 - 4 2026-06-28
SWA130 Southwest Airlines 4 2026-05-21
SWA962 Southwest Airlines 3 2026-04-20
SWA941 Southwest Airlines 3 2026-05-22
SWA908 - 3 2026-06-16
SWA758 Southwest Airlines 3 2026-06-22
SWA699 Southwest Airlines 3 2026-05-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SWA3602 SBA → LAS Jul 14, 01:20 UTCJul 14, 02:15 UTC55m
2026-07-13 SWA2002 LAS → SBA Jul 13, 23:45 UTCJul 14, 00:30 UTC45m
2026-07-13 SWA2002 LAS → SBA Jul 13, 23:42 UTCJul 14, 00:35 UTC53m
2026-07-13 SWA2002 - Jul 13, 19:55 UTCJul 13, 22:40 UTC2h 45m
2026-07-13 SWA356 - Jul 13, 16:05 UTCJul 13, 18:40 UTC2h 35m
2026-07-13 SWA356 - Jul 13, 13:35 UTCJul 13, 15:15 UTC1h 40m
2026-07-13 SWA4031 TPA → MDW Jul 13, 09:25 UTCJul 13, 11:40 UTC2h 15m
2026-07-13 SWA4031 TPA → MDW Jul 13, 09:25 UTCJul 13, 11:43 UTC2h 19m
2026-07-13 SWA2140 - Jul 13, 02:10 UTCJul 13, 04:05 UTC1h 55m
2026-07-12 SWA2140 - Jul 12, 21:15 UTCJul 13, 01:05 UTC3h 50m
2026-07-12 SWA2140 - Jul 12, 19:10 UTCJul 12, 20:20 UTC1h 10m
2026-07-12 SWA835 BUR → SJC Jul 12, 17:15 UTCJul 12, 18:01 UTC45m
2026-07-12 SWA2929 DEN → BUR Jul 12, 14:10 UTCJul 12, 16:10 UTC2h 0m
2026-07-12 SWA2929 DEN → BUR Jul 12, 14:09 UTCJul 12, 16:06 UTC1h 57m
2026-07-12 SWA4090 - Jul 12, 11:35 UTCJul 12, 12:35 UTC1h 0m
2026-07-12 SWA1551 - Jul 12, 02:15 UTCJul 12, 03:05 UTC50m
2026-07-11 SWA2479 - Jul 11, 22:05 UTCJul 11, 23:55 UTC1h 50m
2026-07-11 SWA2479 LGB → DEN Jul 11, 22:02 UTCJul 11, 23:56 UTC1h 54m
2026-07-11 SWA2505 PHX → LGB Jul 11, 20:20 UTCJul 11, 21:10 UTC50m
2026-07-11 SWA2505 - Jul 11, 17:55 UTCJul 11, 19:15 UTC1h 20m
2026-07-11 SWA4011 - Jul 11, 14:15 UTCJul 11, 16:10 UTC1h 55m
2026-07-11 SWA3837 - Jul 11, 03:45 UTCJul 11, 04:50 UTC1h 5m
2026-07-11 SWA853 BUR → SMF Jul 11, 01:35 UTCJul 11, 02:40 UTC1h 5m
2026-07-11 SWA853 BUR → SMF Jul 11, 01:35 UTCJul 11, 02:32 UTC57m
2026-07-10 SWA2411 AUS → BUR Jul 10, 22:10 UTCJul 11, 00:45 UTC2h 35m
2026-07-10 SWA2411 - Jul 10, 20:30 UTCJul 10, 21:05 UTC36m
2026-07-10 SWA264 - Jul 10, 16:35 UTCJul 10, 19:15 UTC2h 40m
2026-07-10 SWA264 - Jul 10, 14:35 UTCJul 10, 15:40 UTC1h 5m
2026-07-10 SWA264 PDX → OAK Jul 10, 12:15 UTCJul 10, 13:40 UTC1h 25m
2026-07-10 SWA309 SMF → PDX Jul 10, 04:55 UTCJul 10, 06:00 UTC1h 5m
2026-07-10 SWA854 BUR → SMF Jul 10, 03:10 UTCJul 10, 04:05 UTC55m
2026-07-10 SWA2201 - Jul 10, 01:30 UTCJul 10, 02:10 UTC40m
2026-07-10 SWA2201 LAS → BUR Jul 10, 01:25 UTCJul 10, 02:11 UTC46m
2026-07-10 SWA4199 - Jul 10, 00:10 UTCJul 10, 00:45 UTC35m
2026-07-09 SWA4199 - Jul 9, 21:50 UTCJul 9, 22:45 UTC55m
2026-07-09 SWA2951 SLC → OAK Jul 9, 19:25 UTCJul 9, 20:55 UTC1h 30m
2026-07-09 SWA2951 - Jul 9, 15:25 UTCJul 9, 18:25 UTC3h 0m
2026-07-09 SWA1781 DTW → MDW Jul 9, 12:50 UTCJul 9, 13:35 UTC45m
2026-07-09 SWA1781 DTW → MDW Jul 9, 12:50 UTCJul 9, 13:36 UTC46m
2026-07-08 SWA4200 MDW → DTW Jul 8, 23:20 UTCJul 9, 00:05 UTC45m
2026-07-08 SWA448 STL → MDW Jul 8, 21:15 UTCJul 8, 22:00 UTC45m
2026-07-08 SWA1371 - Jul 8, 19:00 UTCJul 8, 19:55 UTC55m
2026-07-08 SWA3478 - Jul 8, 14:15 UTCJul 8, 17:50 UTC3h 35m
2026-07-08 SWA1978 - Jul 8, 01:25 UTCJul 8, 04:55 UTC3h 30m
2026-07-07 SWA3624 - Jul 7, 22:55 UTCJul 7, 23:40 UTC45m
2026-07-07 SWA3624 CVG → BNA Jul 7, 22:53 UTCJul 7, 23:37 UTC44m
2026-07-07 SWA3624 - Jul 7, 19:55 UTCJul 7, 22:00 UTC2h 5m
2026-07-07 SWA3624 - Jul 7, 18:20 UTCJul 7, 18:50 UTC30m
2026-07-07 SWA3624 - Jul 7, 14:05 UTCJul 7, 17:10 UTC3h 5m
2026-07-07 SWA4939 - Jul 7, 10:55 UTCJul 7, 12:50 UTC1h 55m

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 N208WN page for operator, model, and routing details .

Mode-S A1B1BC frequently asked

What is Mode-S code A1B1BC?
A1B1BC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N208WN.
Where is Mode-S A1B1BC registered?
Mode-S code A1B1BC 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 A1B1BC 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 A1B1BC, octal 50330674, decimal 10,596,796.
What flights does A1B1BC operate?
Mode-S A1B1BC has broadcast 20 distinct callsigns, including SWA1149, SWA3624, SWA2444, SWA845, SWA3810.