Apparatus

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sensors Mode-S transponder

AC56BA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8941Q · BOEING 737 MAX 8 · operated by SOUTHWEST AIRLINES CO

Hex
AC56BA
Octal
53053272
Decimal
11,294,394
Country
US
Tail
N8941Q
Type
B38M
No current signal · last broadcast Jul 26, 22:30 UTC
Flights observed
753
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:30 UTC

Last known position

Most recent position reported by Mode-S AC56BA.

Country allocation

The ICAO 24-bit address AC56BA 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
SWA2369 - 8 2026-07-08
SWA444 Southwest Airlines 6 2026-04-22
SWA2680 Southwest Airlines 5 2026-04-16
SWA1427 Southwest Airlines 5 2026-07-24
SWA1327 Southwest Airlines 5 2026-06-12
SWA565 Southwest Airlines 4 2026-06-16
SWA2251 - 4 2026-06-18
SWA1926 Southwest Airlines 4 2026-05-17
SWA164 - 4 2026-06-16
SWA1599 Southwest Airlines 4 2026-06-12
SWA146 - 4 2026-06-30
SWA1335 Southwest Airlines 4 2026-05-03
SWA942 Southwest Airlines 3 2026-05-18
SWA776 Southwest Airlines 3 2026-05-18
SWA745 Southwest Airlines 3 2026-07-19
SWA699 Southwest Airlines 3 2026-04-28
SWA695 Southwest Airlines 3 2026-06-14
SWA694 Southwest Airlines 3 2026-05-20
SWA586 Southwest Airlines 3 2026-06-09
SWA564 Southwest Airlines 3 2026-05-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA2243 BUR → OAK Jul 26, 19:05 UTCJul 26, 22:30 UTC3h 25m
2026-07-26 SWA4003 OAK → PHX Jul 26, 16:15 UTCJul 26, 17:45 UTC1h 30m
2026-07-26 SWA4003 OAK → PHX Jul 26, 16:15 UTCJul 26, 17:45 UTC1h 30m
2026-07-26 SWA1120 OGG → LAS Jul 26, 13:10 UTCJul 26, 15:05 UTC1h 55m
2026-07-26 SWA4364 MKE → MCO Jul 26, 10:35 UTCJul 26, 12:00 UTC1h 25m
2026-07-26 SWA4364 MKE → MCO Jul 26, 10:33 UTCJul 26, 11:59 UTC1h 26m
2026-07-26 SWA4626 LAX → OAK Jul 26, 02:10 UTCJul 26, 03:28 UTC1h 18m
2026-07-26 SWA4626 LAX → OAK Jul 26, 02:15 UTCJul 26, 03:30 UTC1h 15m
2026-07-25 SWA3385 ALB → DEN Jul 25, 21:45 UTCJul 26, 00:30 UTC2h 45m
2026-07-25 SWA3385 ALB → DEN Jul 25, 21:42 UTCJul 26, 00:35 UTC2h 53m
2026-07-25 SWA1123 STL → BOS Jul 25, 18:45 UTCJul 25, 20:25 UTC1h 40m
2026-07-25 SWA1123 STL → BOS Jul 25, 18:44 UTCJul 25, 20:20 UTC1h 36m
2026-07-25 SWA1123 STL → BOS Jul 25, 16:40 UTCJul 25, 17:40 UTC1h 0m
2026-07-25 SWA3869 DEN → SAN Jul 25, 13:25 UTCJul 25, 15:25 UTC2h 0m
2026-07-25 SWA3869 DEN → SAN Jul 25, 13:20 UTCJul 25, 15:20 UTC2h 0m
2026-07-25 SWA2496 SJC → BUR Jul 25, 02:45 UTCJul 25, 03:30 UTC45m
2026-07-25 SWA2496 SJC → BUR Jul 25, 02:42 UTCJul 25, 03:24 UTC42m
2026-07-25 SWA2496 SJC → BUR Jul 25, 00:55 UTCJul 25, 01:50 UTC55m
2026-07-24 SWA1427 LGA → BNA Jul 24, 20:10 UTCJul 24, 23:55 UTC3h 45m
2026-07-24 SWA1427 LGA → BNA Jul 24, 20:05 UTCJul 24, 23:50 UTC3h 45m
2026-07-24 SWA1427 LGA → BNA Jul 24, 17:20 UTCJul 24, 18:45 UTC1h 25m
2026-07-24 SWA1701 LAX → SJC Jul 24, 13:35 UTCJul 24, 16:05 UTC2h 30m
2026-07-24 SWA1701 LAX → SJC Jul 24, 13:33 UTCJul 24, 16:05 UTC2h 32m
2026-07-23 SWA5065 BWI → ATL Jul 23, 23:15 UTCJul 24, 00:50 UTC1h 35m
2026-07-23 SWA5064 MDW → DAL Jul 23, 20:35 UTCJul 23, 22:10 UTC1h 35m
2026-07-23 SWA5064 MDW → DAL Jul 23, 20:30 UTCJul 23, 22:09 UTC1h 39m
2026-07-23 SWA709 SJC → LAX Jul 23, 17:25 UTCJul 23, 19:20 UTC1h 55m
2026-07-23 SWA3749 SMF → LAS Jul 23, 13:15 UTCJul 23, 15:50 UTC2h 35m
2026-07-23 SWA3749 SMF → LAS Jul 23, 13:15 UTCJul 23, 15:44 UTC2h 29m
2026-07-23 SWA2646 DEN → SLC Jul 23, 06:55 UTCJul 23, 07:55 UTC1h 0m
2026-07-23 SWA1178 DEN → SJC Jul 23, 02:10 UTCJul 23, 05:45 UTC3h 35m
2026-07-23 SWA1178 DEN → SJC Jul 23, 02:07 UTCJul 23, 05:45 UTC3h 39m
2026-07-22 SWA1034 AUS → HRL Jul 22, 20:55 UTCJul 22, 22:05 UTC1h 10m
2026-07-22 SWA1034 AUS → HRL Jul 22, 20:52 UTCJul 22, 22:00 UTC1h 8m
2026-07-22 SWA1508 SNA → OAK Jul 22, 17:35 UTCJul 22, 19:45 UTC2h 10m
2026-07-22 SWA240 DEN → TUL Jul 22, 14:55 UTCJul 22, 16:15 UTC1h 20m
2026-07-22 SWA2434 LAS → OAK Jul 22, 04:25 UTCJul 22, 05:05 UTC40m
2026-07-21 SWA343 SJC → SAN Jul 21, 21:30 UTCJul 22, 03:25 UTC5h 55m
2026-07-21 SWA1065 MDW → MHT Jul 21, 15:25 UTCJul 21, 16:25 UTC1h 0m
2026-07-21 SWA1031 DEN → OAK Jul 21, 13:15 UTCJul 21, 14:20 UTC1h 5m
2026-07-21 SWA869 BUR → OAK Jul 21, 11:00 UTCJul 21, 11:45 UTC45m
2026-07-21 SWA3194 PBI → ATL Jul 21, 04:30 UTCJul 21, 08:35 UTC4h 5m
2026-07-21 SWA1669 LGA → MDW Jul 21, 00:45 UTCJul 21, 02:50 UTC2h 5m
2026-07-20 SWA721 SJD → DEN Jul 20, 21:30 UTCJul 20, 22:40 UTC1h 10m
2026-07-20 SWA2017 SMF → SJD Jul 20, 15:58 UTCJul 20, 18:41 UTC2h 43m
2026-07-20 SWA2017 SMF → SJD Jul 20, 16:00 UTCJul 20, 17:55 UTC1h 55m
2026-07-20 SWA4894 - Jul 20, 13:40 UTCJul 20, 14:40 UTC1h 0m
2026-07-20 SWA955 PHX → LAX Jul 20, 04:40 UTCJul 20, 05:40 UTC1h 0m
2026-07-20 SWA44 DAL → PHX Jul 20, 01:10 UTCJul 20, 03:10 UTC2h 0m
2026-07-19 SWA1742 DEN → ONT Jul 19, 23:05 UTCJul 19, 23:50 UTC45m

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 N8941Q page for operator, model, and routing details .

Mode-S AC56BA frequently asked

What is Mode-S code AC56BA?
AC56BA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8941Q.
Where is Mode-S AC56BA registered?
Mode-S code AC56BA 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 AC56BA broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC56BA, octal 53053272, decimal 11,294,394.
What flights does AC56BA operate?
Mode-S AC56BA has broadcast 20 distinct callsigns, including SWA2369, SWA444, SWA2680, SWA1427, SWA1327.