Apparatus

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sensors Mode-S transponder

AA735A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N7724A · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
AA735A
Octal
52471532
Decimal
11,170,650
Country
US
Tail
N7724A
Type
B737
No current signal · last broadcast Jul 26, 21:30 UTC
Flights observed
753
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:30 UTC

Last known position

Most recent position reported by Mode-S AA735A.

Country allocation

The ICAO 24-bit address AA735A 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
SWA1836 Southwest Airlines 7 2026-07-10
SWA1676 Southwest Airlines 7 2026-04-18
SWA1382 - 6 2026-06-20
SWA751 Southwest Airlines 5 2026-06-03
SWA1996 - 5 2026-07-24
SWA1735 Southwest Airlines 5 2026-05-24
SWA1614 Southwest Airlines 5 2026-05-23
SWA847 Southwest Airlines 4 2026-07-05
SWA750 Southwest Airlines 4 2026-06-03
SWA716 - 4 2026-07-02
SWA3900 Southwest Airlines 4 2026-04-15
SWA3383 Southwest Airlines 4 2026-05-04
SWA3329 - 4 2026-07-14
SWA328 - 4 2026-07-16
SWA3130 Southwest Airlines 4 2026-06-08
SWA2433 - 4 2026-07-11
SWA2404 - 4 2026-07-15
SWA2015 - 4 2026-07-15
SWA1985 Southwest Airlines 4 2026-07-24
SWA1922 - 4 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA267 BHM → DAL Jul 26, 18:25 UTCJul 26, 21:30 UTC3h 5m
2026-07-26 SWA3311 BWI → PWM Jul 26, 15:55 UTCJul 26, 17:20 UTC1h 25m
2026-07-26 SWA3311 BWI → PWM Jul 26, 15:50 UTCJul 26, 17:12 UTC1h 22m
2026-07-26 SWA3796 HNL → OAK Jul 26, 13:50 UTCJul 26, 15:05 UTC1h 15m
2026-07-26 SWA1787 MDW → BOS Jul 26, 10:50 UTCJul 26, 12:25 UTC1h 35m
2026-07-26 SWA1787 MDW → BOS Jul 26, 10:48 UTCJul 26, 12:20 UTC1h 33m
2026-07-26 SWA3573 SAN → SJC Jul 26, 00:30 UTCJul 26, 01:55 UTC1h 25m
2026-07-26 SWA3573 SAN → SJC Jul 26, 00:27 UTCJul 26, 01:50 UTC1h 23m
2026-07-25 SWA1879 LAS → PDX Jul 25, 21:45 UTCJul 25, 23:10 UTC1h 25m
2026-07-25 SWA1129 AUS → SJC Jul 25, 18:40 UTCJul 25, 20:30 UTC1h 50m
2026-07-25 SWA1623 BWI → BDL Jul 25, 16:35 UTCJul 25, 17:25 UTC50m
2026-07-25 SWA4524 BNA → RSW Jul 25, 14:45 UTCJul 25, 15:40 UTC55m
2026-07-25 SWA1077 DAL → BWI Jul 25, 12:25 UTCJul 25, 13:40 UTC1h 15m
2026-07-25 SWA694 HOU → MSY Jul 25, 01:00 UTCJul 25, 01:35 UTC35m
2026-07-24 SWA694 HOU → MSY Jul 24, 22:45 UTCJul 24, 23:30 UTC45m
2026-07-24 SWA1996 - Jul 24, 17:55 UTCJul 24, 20:40 UTC2h 45m
2026-07-24 SWA1996 CUN → STL Jul 24, 17:52 UTCJul 24, 20:38 UTC2h 46m
2026-07-24 SWA1985 STL → CUN Jul 24, 13:50 UTCJul 24, 16:25 UTC2h 35m
2026-07-24 SWA1985 STL → CUN Jul 24, 13:45 UTCJul 24, 16:25 UTC2h 40m
2026-07-24 SWA1109 SJC → LAX Jul 24, 10:20 UTCJul 24, 12:20 UTC2h 0m
2026-07-24 SWA4010 SLC → LAS Jul 24, 02:30 UTCJul 24, 04:30 UTC2h 0m
2026-07-24 SWA4010 SLC → LAS Jul 24, 02:27 UTCJul 24, 04:24 UTC1h 58m
2026-07-23 SWA1217 FLL → MDW Jul 23, 23:55 UTCJul 24, 01:40 UTC1h 45m
2026-07-23 SWA481 SAN → OAK Jul 23, 22:10 UTCJul 23, 23:05 UTC55m
2026-07-23 SWA481 SAN → OAK Jul 23, 22:09 UTCJul 23, 22:57 UTC48m
2026-07-23 SWA481 SAN → OAK Jul 23, 19:05 UTCJul 23, 20:55 UTC1h 50m
2026-07-23 SWA2570 SLC → OAK Jul 23, 15:55 UTCJul 23, 18:05 UTC2h 10m
2026-07-23 SWA578 MDW → LGA Jul 23, 03:35 UTCJul 23, 04:40 UTC1h 5m
2026-07-23 SWA1168 BWI → ALB Jul 23, 00:40 UTCJul 23, 01:35 UTC55m
2026-07-22 SWA4937 DCA → HOU Jul 22, 22:20 UTCJul 22, 23:30 UTC1h 10m
2026-07-22 SWA1996 CUN → STL Jul 22, 17:45 UTCJul 22, 20:45 UTC3h 0m
2026-07-22 SWA1996 CUN → STL Jul 22, 17:41 UTCJul 22, 20:42 UTC3h 1m
2026-07-22 SWA1985 STL → CUN Jul 22, 13:40 UTCJul 22, 16:35 UTC2h 55m
2026-07-22 SWA1985 STL → CUN Jul 22, 13:38 UTCJul 22, 16:34 UTC2h 56m
2026-07-22 SWA878 SAN → SFO Jul 22, 02:15 UTCJul 22, 04:55 UTC2h 40m
2026-07-22 SWA878 SAN → SFO Jul 22, 02:10 UTCJul 22, 04:45 UTC2h 35m
2026-07-21 SWA878 SAN → SFO Jul 21, 23:05 UTCJul 22, 00:45 UTC1h 40m
2026-07-21 SWA3563 LGA → MDW Jul 21, 19:45 UTCJul 21, 21:10 UTC1h 25m
2026-07-21 SWA949 - Jul 21, 17:45 UTCJul 21, 18:30 UTC45m
2026-07-21 SWA949 SMF → PDX Jul 21, 17:41 UTCJul 21, 18:46 UTC1h 5m
2026-07-21 SWA949 - Jul 21, 15:30 UTCJul 21, 16:35 UTC1h 5m
2026-07-21 SWA3707 - Jul 21, 13:40 UTCJul 21, 14:40 UTC1h 0m
2026-07-21 SWA704 BOS → BWI Jul 21, 04:30 UTCJul 21, 05:30 UTC1h 0m
2026-07-21 SWA2256 BNA → LGA Jul 21, 01:15 UTCJul 21, 03:10 UTC1h 55m
2026-07-20 SWA4908 - Jul 20, 22:25 UTCJul 21, 00:20 UTC1h 55m
2026-07-20 SWA4811 SJC → SAN Jul 20, 19:50 UTCJul 20, 20:55 UTC1h 5m
2026-07-20 SWA2121 SAN → SJC Jul 20, 18:00 UTCJul 20, 19:00 UTC1h 0m
2026-07-20 SWA2121 SAN → SJC Jul 20, 18:00 UTCJul 20, 18:56 UTC56m
2026-07-20 SWA2121 - Jul 20, 16:05 UTCJul 20, 16:50 UTC45m
2026-07-20 SWA4750 - Jul 20, 13:35 UTCJul 20, 14:30 UTC55m

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 N7724A page for operator, model, and routing details .

Mode-S AA735A frequently asked

What is Mode-S code AA735A?
AA735A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N7724A.
Where is Mode-S AA735A registered?
Mode-S code AA735A 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 AA735A broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA735A, octal 52471532, decimal 11,170,650.
What flights does AA735A operate?
Mode-S AA735A has broadcast 20 distinct callsigns, including SWA1836, SWA1676, SWA1382, SWA751, SWA1996.