Apparatus

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sensors Mode-S transponder

AC729C

ICAO 24-bit transponder address · allocated to United States

Hex
AC729C
Octal
53071234
Decimal
11,301,532
Country
US
Broadcasting now · callsign SWA3649 · 35,000 ft
Flights observed
291
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Current position

AC729C is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AC729C 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
SWA2328 - 4 2026-06-25
SWA980 - 3 2026-06-22
SWA899 - 3 2026-06-25
SWA486 - 3 2026-06-24
SWA434 Southwest Airlines 3 2026-06-09
SWA334 Southwest Airlines 3 2026-06-11
SWA3283 - 3 2026-07-01
SWA3151 Southwest Airlines 3 2026-06-06
SWA3027 - 3 2026-06-27
SWA2345 - 3 2026-07-09
SWA2298 Southwest Airlines 3 2026-06-06
SWA2175 Southwest Airlines 3 2026-06-11
SWA1267 - 3 2026-06-21
BOE343 - 3 2026-05-19
SWA979 Southwest Airlines 2 2026-06-16
SWA974 Southwest Airlines 2 2026-06-13
SWA969 - 2 2026-06-16
SWA868 Southwest Airlines 2 2026-06-01
SWA8500 Southwest Airlines 2 2026-05-28
SWA595 - 2 2026-06-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-09 SWA2345 LAS → SFO Jul 9, 05:15 UTCJul 9, 06:25 UTC1h 10m
2026-07-08 SWA976 - Jul 8, 23:05 UTCJul 9, 03:25 UTC4h 20m
2026-07-08 SWA1159 - Jul 8, 20:50 UTCJul 8, 21:45 UTC55m
2026-07-08 SWA1159 - Jul 8, 18:10 UTCJul 8, 19:40 UTC1h 30m
2026-07-08 SWA1517 - Jul 8, 15:00 UTCJul 8, 16:55 UTC1h 55m
2026-07-08 SWA1517 DEN → DAL Jul 8, 12:20 UTCJul 8, 13:50 UTC1h 30m
2026-07-08 SWA2649 - Jul 8, 03:10 UTCJul 8, 05:15 UTC2h 5m
2026-07-08 SWA3088 - Jul 8, 01:15 UTCJul 8, 02:20 UTC1h 5m
2026-07-07 SWA3197 PHX → OAK Jul 7, 22:55 UTCJul 8, 00:20 UTC1h 25m
2026-07-07 SWA3816 SMF → PHX Jul 7, 19:30 UTCJul 7, 21:00 UTC1h 30m
2026-07-07 SWA2504 HHR → SMF Jul 7, 17:20 UTCJul 7, 18:20 UTC1h 0m
2026-07-07 SWA2071 DEN → LGB Jul 7, 14:25 UTCJul 7, 16:20 UTC1h 55m
2026-07-07 SWA3909 STL → DEN Jul 7, 11:10 UTCJul 7, 12:55 UTC1h 45m
2026-07-07 SWA2087 - Jul 7, 03:55 UTCJul 7, 05:30 UTC1h 35m
2026-07-07 SWA2069 - Jul 7, 01:25 UTCJul 7, 02:55 UTC1h 30m
2026-07-06 SWA2069 - Jul 6, 21:35 UTCJul 7, 00:20 UTC2h 45m
2026-07-06 SWA4659 - Jul 6, 17:00 UTCJul 6, 20:10 UTC3h 10m
2026-07-06 SWA3141 DEN → MKE Jul 6, 13:40 UTCJul 6, 15:32 UTC1h 52m
2026-07-06 SWA3141 - Jul 6, 13:40 UTCJul 6, 15:35 UTC1h 55m
2026-07-06 SWA2545 - Jul 6, 11:10 UTCJul 6, 12:35 UTC1h 25m
2026-07-06 SWA3133 MCO → MCI Jul 6, 03:25 UTCJul 6, 05:48 UTC2h 23m
2026-07-06 SWA1603 MDW → MCO Jul 6, 00:05 UTCJul 6, 02:15 UTC2h 10m
2026-07-05 SWA1603 - Jul 5, 20:55 UTCJul 5, 22:55 UTC2h 0m
2026-07-05 SWA2945 - Jul 5, 17:45 UTCJul 5, 18:55 UTC1h 10m
2026-07-05 SWA2945 MKE → DEN Jul 5, 17:40 UTCJul 5, 19:38 UTC1h 58m
2026-07-05 SWA1272 - Jul 5, 15:05 UTCJul 5, 16:45 UTC1h 40m
2026-07-05 SWA1272 TPA → BWI Jul 5, 12:15 UTCJul 5, 14:05 UTC1h 50m
2026-07-04 SWA2318 ONT → OAK Jul 4, 22:30 UTCJul 5, 00:15 UTC1h 45m
2026-07-04 SWA1285 PNS → HOU Jul 4, 20:04 UTCJul 4, 21:32 UTC1h 28m
2026-07-04 SWA1285 DEN → PNS Jul 4, 16:45 UTCJul 4, 19:15 UTC2h 30m
2026-07-04 SWA2966 LAS → DEN Jul 4, 13:55 UTCJul 4, 15:20 UTC1h 25m
2026-07-04 SWA1329 - Jul 4, 07:25 UTCJul 4, 08:10 UTC45m
2026-07-04 SWA1329 - Jul 4, 03:20 UTCJul 4, 06:05 UTC2h 45m
2026-07-04 SWA1219 COS → DAL Jul 4, 00:40 UTCJul 4, 02:05 UTC1h 25m
2026-07-03 SWA4385 SAN → SFO Jul 3, 21:55 UTCJul 3, 23:50 UTC1h 55m
2026-07-03 SWA4385 SAN → SFO Jul 3, 21:50 UTCJul 3, 23:48 UTC1h 58m
2026-07-03 SWA4752 STL → HOU Jul 3, 18:58 UTCJul 3, 20:29 UTC1h 31m
2026-07-03 SWA4752 - Jul 3, 19:00 UTCJul 3, 20:40 UTC1h 40m
2026-07-03 SWA4084 SMF → DAL Jul 3, 12:35 UTCJul 3, 14:25 UTC1h 50m
2026-07-03 SWA4084 SMF → DAL Jul 3, 12:32 UTCJul 3, 14:16 UTC1h 44m
2026-07-03 SWA1315 - Jul 3, 10:45 UTCJul 3, 11:20 UTC35m
2026-07-03 SWA4404 - Jul 3, 03:10 UTCJul 3, 05:30 UTC2h 20m
2026-07-03 SWA4404 MCO → SAT Jul 3, 03:08 UTCJul 3, 05:25 UTC2h 17m
2026-07-03 SWA3376 PIT → MCO Jul 3, 00:15 UTCJul 3, 02:10 UTC1h 55m
2026-07-03 SWA3376 PIT → MCO Jul 3, 00:14 UTCJul 3, 02:05 UTC1h 51m
2026-07-02 SWA4740 - Jul 2, 22:00 UTCJul 2, 23:10 UTC1h 10m
2026-07-02 SWA4740 BNA → PIT Jul 2, 21:59 UTCJul 2, 23:07 UTC1h 8m
2026-07-02 SWA3216 - Jul 2, 19:00 UTCJul 2, 20:40 UTC1h 40m
2026-07-02 SWA623 - Jul 2, 16:20 UTCJul 2, 17:55 UTC1h 35m
2026-07-02 SWA3215 - Jul 2, 13:30 UTCJul 2, 15:05 UTC1h 35m

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.

Mode-S AC729C frequently asked

What is Mode-S code AC729C?
AC729C is an ICAO 24-bit transponder address. Allocated to United States.
Where is Mode-S AC729C registered?
Mode-S code AC729C 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 AC729C broadcasting right now?
Yes. Mode-S AC729C is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC729C, octal 53071234, decimal 11,301,532.
What flights does AC729C operate?
Mode-S AC729C has broadcast 20 distinct callsigns, including SWA2328, SWA980, SWA899, SWA486, SWA434.