Apparatus

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sensors Mode-S transponder

AC5F42

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8969S · BOEING 737 MAX 8 · operated by BOEING CO

Hex
AC5F42
Octal
53057502
Decimal
11,296,578
Country
US
Tail
N8969S
Type
B38M
No current signal · last broadcast Jul 26, 21:10 UTC
Flights observed
764
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:10 UTC

Last known position

Most recent position reported by Mode-S AC5F42.

Country allocation

The ICAO 24-bit address AC5F42 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
SWA4055 Southwest Airlines 5 2026-06-01
SWA3161 - 5 2026-06-27
SWA1924 Southwest Airlines 5 2026-04-25
SWA869 Southwest Airlines 4 2026-04-24
SWA424 - 4 2026-07-08
SWA4198 - 4 2026-07-06
SWA3797 - 4 2026-07-05
SWA3470 Southwest Airlines 4 2026-05-27
SWA3452 Southwest Airlines 4 2026-04-17
SWA284 - 4 2026-06-20
SWA2837 Southwest Airlines 4 2026-05-19
SWA2728 - 4 2026-07-10
SWA2288 - 4 2026-07-16
SWA1318 Southwest Airlines 4 2026-06-01
SWA938 - 3 2026-07-10
SWA9008 - 3 2026-07-06
SWA862 Southwest Airlines 3 2026-06-01
SWA854 Southwest Airlines 3 2026-04-25
SWA784 Southwest Airlines 3 2026-06-20
SWA656 Southwest Airlines 3 2026-06-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA914 LAS → SJC Jul 26, 20:10 UTCJul 26, 21:10 UTC1h 0m
2026-07-26 SWA2744 BUR → OAK Jul 26, 17:30 UTCJul 26, 18:55 UTC1h 25m
2026-07-26 SWA2744 BUR → OAK Jul 26, 14:30 UTCJul 26, 16:20 UTC1h 50m
2026-07-26 SWA2341 RNO → SAN Jul 26, 10:20 UTCJul 26, 13:10 UTC2h 50m
2026-07-26 SWA4684 DEN → SFO Jul 26, 01:30 UTCJul 26, 03:25 UTC1h 55m
2026-07-26 SWA4684 DEN → SFO Jul 26, 01:28 UTCJul 26, 03:15 UTC1h 47m
2026-07-25 SWA2032 PHX → SJC Jul 25, 23:00 UTCJul 26, 00:30 UTC1h 30m
2026-07-25 SWA1405 SJC → LGB Jul 25, 20:45 UTCJul 25, 22:05 UTC1h 20m
2026-07-25 SWA1405 SJC → LGB Jul 25, 20:43 UTCJul 25, 22:05 UTC1h 22m
2026-07-25 SWA1988 DEN → OAK Jul 25, 17:50 UTCJul 25, 19:45 UTC1h 55m
2026-07-25 SWA2833 - Jul 25, 14:30 UTCJul 25, 16:40 UTC2h 10m
2026-07-25 SWA2833 PHX → HOU Jul 25, 14:26 UTCJul 25, 16:36 UTC2h 11m
2026-07-25 SWA1379 OAK → SEA Jul 25, 11:15 UTCJul 25, 13:10 UTC1h 55m
2026-07-25 SWA2221 BWI → ALB Jul 25, 02:40 UTCJul 25, 05:00 UTC2h 20m
2026-07-25 SWA2221 BWI → ALB Jul 25, 00:20 UTCJul 25, 01:25 UTC1h 5m
2026-07-24 SWA1741 PHX → ONT Jul 24, 21:05 UTCJul 24, 23:10 UTC2h 5m
2026-07-24 SWA2119 PDX → SJC Jul 24, 17:40 UTCJul 24, 19:55 UTC2h 15m
2026-07-24 SWA2119 PDX → SJC Jul 24, 17:37 UTCJul 24, 19:51 UTC2h 14m
2026-07-24 SWA960 ISP → BNA Jul 24, 15:10 UTCJul 24, 16:30 UTC1h 20m
2026-07-24 SWA3189 DEN → BUR Jul 24, 11:40 UTCJul 24, 13:50 UTC2h 10m
2026-07-24 SWA1045 SAN → SJC Jul 24, 00:55 UTCJul 24, 03:00 UTC2h 5m
2026-07-23 SWA1045 SAN → SJC Jul 23, 20:55 UTCJul 23, 23:40 UTC2h 45m
2026-07-23 SWA3128 - Jul 23, 18:30 UTCJul 23, 19:40 UTC1h 10m
2026-07-23 SWA748 PHX → RNO Jul 23, 16:15 UTCJul 23, 17:15 UTC1h 0m
2026-07-23 SWA4803 MDW → LAX Jul 23, 12:25 UTCJul 23, 14:00 UTC1h 35m
2026-07-23 SWA3830 SAN → OAK Jul 23, 05:20 UTCJul 23, 07:00 UTC1h 40m
2026-07-23 SWA3830 SAN → OAK Jul 23, 05:15 UTCJul 23, 06:54 UTC1h 39m
2026-07-23 SWA3570 MHT → BWI Jul 23, 02:30 UTCJul 23, 03:50 UTC1h 20m
2026-07-22 SWA3079 SFO → LAX Jul 22, 20:55 UTCJul 22, 23:10 UTC2h 15m
2026-07-22 SWA3079 SFO → LAX Jul 22, 20:51 UTCJul 22, 23:10 UTC2h 19m
2026-07-22 SWA1941 BOS → BWI Jul 22, 16:05 UTCJul 22, 19:30 UTC3h 25m
2026-07-22 SWA1941 BOS → BWI Jul 22, 16:01 UTCJul 22, 19:24 UTC3h 24m
2026-07-22 SWA1941 BOS → BWI Jul 22, 13:20 UTCJul 22, 15:00 UTC1h 40m
2026-07-22 SWA518 PHX → OAK Jul 22, 11:10 UTCJul 22, 12:20 UTC1h 10m
2026-07-22 SWA479 AUS → IND Jul 22, 00:25 UTCJul 22, 02:25 UTC2h 0m
2026-07-21 SWA867 BLI → LAS Jul 21, 20:35 UTCJul 21, 23:35 UTC3h 0m
2026-07-21 SWA3458 LAX → SFO Jul 21, 17:10 UTCJul 21, 17:55 UTC45m
2026-07-21 SWA3458 LAX → SFO Jul 21, 17:10 UTCJul 21, 18:00 UTC50m
2026-07-21 SWA2722 - Jul 21, 15:10 UTCJul 21, 16:05 UTC55m
2026-07-21 SWA2722 BWI → ROC Jul 21, 15:06 UTCJul 21, 16:00 UTC54m
2026-07-21 SWA3486 ATL → TPA Jul 21, 05:30 UTCJul 21, 10:15 UTC4h 45m
2026-07-21 SWA3486 ATL → TPA Jul 21, 05:26 UTCJul 21, 10:10 UTC4h 44m
2026-07-21 SWA4513 SJC → SAN Jul 21, 02:55 UTCJul 21, 04:05 UTC1h 10m
2026-07-21 SWA3864 BOS → DEN Jul 21, 00:25 UTCJul 21, 01:15 UTC50m
2026-07-21 SWA3864 BOS → DEN Jul 21, 00:20 UTCJul 21, 01:12 UTC52m
2026-07-20 SWA4131 PDX → OAK Jul 20, 21:45 UTCJul 20, 23:40 UTC1h 55m
2026-07-20 SWA681 PHX → DEN Jul 20, 18:45 UTCJul 20, 20:10 UTC1h 25m
2026-07-20 SWA681 - Jul 20, 16:30 UTCJul 20, 17:25 UTC55m
2026-07-20 SWA4119 - Jul 20, 14:05 UTCJul 20, 14:50 UTC45m
2026-07-20 SWA2066 MDW → STL Jul 20, 04:15 UTCJul 20, 06:25 UTC2h 10m

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 N8969S page for operator, model, and routing details .

Mode-S AC5F42 frequently asked

What is Mode-S code AC5F42?
AC5F42 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8969S.
Where is Mode-S AC5F42 registered?
Mode-S code AC5F42 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 AC5F42 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC5F42, octal 53057502, decimal 11,296,578.
What flights does AC5F42 operate?
Mode-S AC5F42 has broadcast 20 distinct callsigns, including SWA4055, SWA3161, SWA1924, SWA869, SWA424.