Apparatus

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sensors Mode-S transponder

AC0BFB

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8755L · BOEING 737 MAX 8 · operated by SOUTHWEST AIRLINES CO

Hex
AC0BFB
Octal
53005773
Decimal
11,275,259
Country
US
Tail
N8755L
Type
B38M
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
594
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S AC0BFB.

Country allocation

The ICAO 24-bit address AC0BFB 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
SWA3781 - 7 2026-07-16
SWA4024 Southwest Airlines 5 2026-07-23
SWA2618 Southwest Airlines 5 2026-06-09
SWA112 - 5 2026-06-21
SWA479 Southwest Airlines 4 2026-06-18
SWA3343 - 4 2026-07-16
SWA296 - 4 2026-04-14
SWA277 Southwest Airlines 4 2026-06-19
SWA249 Southwest Airlines 4 2026-05-20
SWA2026 - 4 2026-06-21
SWA8507 - 3 2026-07-13
SWA719 Southwest Airlines 3 2026-05-23
SWA718 Southwest Airlines 3 2026-06-18
SWA4238 Southwest Airlines 3 2026-05-30
SWA4005 Southwest Airlines 3 2026-05-04
SWA3702 - 3 2026-04-15
SWA3573 Southwest Airlines 3 2026-05-27
SWA3389 - 3 2026-07-19
SWA3342 - 3 2026-07-16
SWA3203 Southwest Airlines 3 2026-04-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA2832 BOS → MDW Jul 26, 20:55 UTCJul 26, 21:55 UTC1h 0m
2026-07-26 SWA2832 BOS → MDW Jul 26, 18:35 UTCJul 26, 19:20 UTC45m
2026-07-26 SWA2832 BOS → MDW Jul 26, 16:15 UTCJul 26, 17:35 UTC1h 20m
2026-07-26 SWA4353 OAK → PSP Jul 26, 14:00 UTCJul 26, 14:55 UTC55m
2026-07-26 SWA3855 BNA → FLL Jul 26, 11:20 UTCJul 26, 12:15 UTC55m
2026-07-26 SWA3200 DCA → BNA Jul 26, 03:25 UTCJul 26, 06:30 UTC3h 5m
2026-07-26 SWA2187 ATL → DEN Jul 26, 01:25 UTCJul 26, 02:10 UTC45m
2026-07-25 SWA4510 PHX → OGG Jul 25, 23:15 UTCJul 26, 00:05 UTC50m
2026-07-25 SWA190 CUN → PHX Jul 25, 17:40 UTCJul 25, 21:10 UTC3h 30m
2026-07-25 SWA190 CUN → PHX Jul 25, 17:37 UTCJul 25, 21:09 UTC3h 33m
2026-07-25 SWA1985 STL → CUN Jul 25, 13:20 UTCJul 25, 16:00 UTC2h 40m
2026-07-25 SWA3317 LGB → OAK Jul 25, 04:00 UTCJul 25, 05:35 UTC1h 35m
2026-07-25 SWA3002 MHT → MDW Jul 25, 00:15 UTCJul 25, 02:50 UTC2h 35m
2026-07-24 SWA2107 SJC → BUR Jul 24, 21:45 UTCJul 24, 23:05 UTC1h 20m
2026-07-24 SWA2107 SJC → BUR Jul 24, 21:40 UTCJul 24, 23:01 UTC1h 21m
2026-07-24 SWA3186 DCA → PVD Jul 24, 16:25 UTCJul 24, 19:20 UTC2h 55m
2026-07-24 SWA3186 DCA → PVD Jul 24, 13:35 UTCJul 24, 15:10 UTC1h 35m
2026-07-24 SWA1670 ALB → BWI Jul 24, 06:15 UTCJul 24, 07:45 UTC1h 30m
2026-07-24 SWA1670 ALB → BWI Jul 24, 03:15 UTCJul 24, 05:25 UTC2h 10m
2026-07-23 SWA4024 ORD → PHX Jul 23, 22:45 UTCJul 24, 01:30 UTC2h 45m
2026-07-23 SWA4024 ORD → PHX Jul 23, 19:50 UTCJul 23, 21:35 UTC1h 45m
2026-07-23 SWA2204 PHX → ORD Jul 23, 14:20 UTCJul 23, 18:35 UTC4h 15m
2026-07-23 SWA139 LAS → OAK Jul 23, 10:35 UTCJul 23, 11:35 UTC1h 0m
2026-07-23 SWA2515 LAS → OAK Jul 23, 00:10 UTCJul 23, 00:30 UTC20m
2026-07-22 SWA2262 BDL → BWI Jul 22, 16:55 UTCJul 22, 22:50 UTC5h 55m
2026-07-22 SWA2262 BDL → BWI Jul 22, 16:53 UTCJul 22, 23:00 UTC6h 7m
2026-07-22 SWA3727 LAX → SFO Jul 22, 11:30 UTCJul 22, 14:50 UTC3h 20m
2026-07-22 SWA3727 LAX → SFO Jul 22, 11:06 UTCJul 22, 14:47 UTC3h 42m
2026-07-22 SWA4157 DEN → PIT Jul 22, 03:05 UTCJul 22, 04:05 UTC1h 0m
2026-07-22 SWA4157 DEN → PIT Jul 22, 03:05 UTCJul 22, 03:58 UTC53m
2026-07-21 SWA905 MBJ → BWI Jul 21, 22:45 UTCJul 22, 00:50 UTC2h 5m
2026-07-21 SWA906 BWI → MBJ Jul 21, 17:05 UTCJul 21, 19:20 UTC2h 15m
2026-07-21 SWA906 BWI → MBJ Jul 21, 17:01 UTCJul 21, 20:15 UTC3h 14m
2026-07-21 SWA2458 ALB → BWI Jul 21, 13:20 UTCJul 21, 14:15 UTC55m
2026-07-21 SWA2458 ALB → BWI Jul 21, 13:19 UTCJul 21, 14:18 UTC1h 0m
2026-07-21 SWA857 LAS → OAK Jul 21, 11:00 UTCJul 21, 11:55 UTC55m
2026-07-21 SWA857 LAS → OAK Jul 21, 10:57 UTCJul 21, 11:50 UTC53m
2026-07-21 SWA2683 SFO → BWI Jul 21, 04:35 UTCJul 21, 09:05 UTC4h 30m
2026-07-20 SWA673 MHT → MCO Jul 20, 23:15 UTCJul 21, 03:10 UTC3h 54m
2026-07-20 SWA2983 BWI → MHT Jul 20, 20:20 UTCJul 20, 21:35 UTC1h 15m
2026-07-20 SWA2983 BWI → MHT Jul 20, 20:16 UTCJul 20, 21:29 UTC1h 13m
2026-07-20 SWA595 BNA → MSY Jul 20, 18:10 UTCJul 20, 19:15 UTC1h 5m
2026-07-20 SWA724 SEA → SJC Jul 20, 14:50 UTCJul 20, 16:55 UTC2h 5m
2026-07-20 SWA724 SEA → SJC Jul 20, 14:48 UTCJul 20, 16:52 UTC2h 4m
2026-07-20 SWA884 SJC → PHX Jul 20, 12:35 UTCJul 20, 13:35 UTC1h 0m
2026-07-20 SWA1246 IAH → MSY Jul 20, 09:45 UTCJul 20, 10:50 UTC1h 5m
2026-07-20 SWA4435 - Jul 20, 05:10 UTCJul 20, 06:10 UTC1h 0m
2026-07-20 SWA3001 ISP → BWI Jul 20, 02:55 UTCJul 20, 04:15 UTC1h 20m
2026-07-19 SWA3621 MDW → PHL Jul 19, 23:15 UTCJul 20, 00:52 UTC1h 37m
2026-07-19 SWA3621 MDW → PHL Jul 19, 23:15 UTCJul 20, 00:45 UTC1h 30m

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 N8755L page for operator, model, and routing details .

Mode-S AC0BFB frequently asked

What is Mode-S code AC0BFB?
AC0BFB is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8755L.
Where is Mode-S AC0BFB registered?
Mode-S code AC0BFB 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 AC0BFB broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC0BFB, octal 53005773, decimal 11,275,259.
What flights does AC0BFB operate?
Mode-S AC0BFB has broadcast 20 distinct callsigns, including SWA3781, SWA4024, SWA2618, SWA112, SWA479.