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sensors Mode-S transponder

AA77C0

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N7739A · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
AA77C0
Octal
52473700
Decimal
11,171,776
Country
US
Tail
N7739A
Type
B737
No current signal · last broadcast 2h ago
Flights observed
674
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S AA77C0.

Country allocation

The ICAO 24-bit address AA77C0 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
SWA375 - 8 2026-07-02
SWA2268 Southwest Airlines 6 2026-05-15
SWA921 Southwest Airlines 5 2026-06-05
SWA576 Southwest Airlines 5 2026-05-08
SWA3517 Southwest Airlines 5 2026-05-16
SWA3438 Southwest Airlines 5 2026-05-18
SWA322 - 5 2026-06-21
SWA3088 - 5 2026-07-03
SWA295 Southwest Airlines 5 2026-06-15
SWA2264 - 5 2026-07-05
SWA2137 Southwest Airlines 5 2026-04-28
SWA2060 Southwest Airlines 5 2026-05-10
SWA1083 Southwest Airlines 5 2026-05-10
SWA9002 Southwest Airlines 4 2026-04-24
SWA8 Southwest Airlines 4 2026-04-30
SWA456 Southwest Airlines 4 2026-05-19
SWA432 - 4 2026-06-29
SWA2901 Southwest Airlines 4 2026-05-23
SWA2717 - 4 2026-07-12
SWA2715 Southwest Airlines 4 2026-05-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SWA1025 CUN → MCO Jul 14, 18:10 UTCJul 14, 19:50 UTC1h 40m
2026-07-14 SWA1836 - Jul 14, 14:25 UTCJul 14, 16:55 UTC2h 30m
2026-07-14 SWA287 - Jul 14, 10:55 UTCJul 14, 13:20 UTC2h 25m
2026-07-14 SWA158 - Jul 14, 00:20 UTCJul 14, 02:55 UTC2h 35m
2026-07-13 SWA2896 - Jul 13, 21:15 UTCJul 13, 23:40 UTC2h 25m
2026-07-13 SWA3008 - Jul 13, 17:30 UTCJul 13, 20:00 UTC2h 30m
2026-07-13 SWA3008 MSY → LGA Jul 13, 17:30 UTCJul 13, 19:59 UTC2h 30m
2026-07-13 SWA1642 DEN → MSY Jul 13, 14:15 UTCJul 13, 16:30 UTC2h 15m
2026-07-13 SWA1769 - Jul 13, 11:15 UTCJul 13, 12:45 UTC1h 30m
2026-07-13 SWA1769 DSM → DEN Jul 13, 11:13 UTCJul 13, 12:41 UTC1h 29m
2026-07-13 SWA2687 DEN → DSM Jul 13, 04:25 UTCJul 13, 05:45 UTC1h 20m
2026-07-13 SWA2687 DEN → DSM Jul 13, 04:25 UTCJul 13, 05:41 UTC1h 16m
2026-07-13 SWA9005 LAS → DEN Jul 13, 01:39 UTCJul 13, 03:09 UTC1h 31m
2026-07-13 SWA9005 LAS → DEN Jul 13, 01:40 UTCJul 13, 03:15 UTC1h 35m
2026-07-12 SWA8505 BUR → LAS Jul 12, 16:17 UTCJul 12, 17:02 UTC46m
2026-07-12 SWA8505 BUR → LAS Jul 12, 16:20 UTCJul 12, 17:05 UTC45m
2026-07-12 SWA2163 LAS → BUR Jul 12, 04:35 UTCJul 12, 05:15 UTC40m
2026-07-12 SWA2163 LAS → BUR Jul 12, 04:31 UTCJul 12, 05:15 UTC44m
2026-07-12 SWA2717 - Jul 12, 01:00 UTCJul 12, 03:20 UTC2h 20m
2026-07-11 SWA2717 - Jul 11, 21:50 UTCJul 12, 00:05 UTC2h 15m
2026-07-11 SWA1080 - Jul 11, 20:15 UTCJul 11, 20:25 UTC10m
2026-07-11 SWA1080 - Jul 11, 17:30 UTCJul 11, 20:00 UTC2h 30m
2026-07-11 SWA1080 OMA → MCO Jul 11, 17:29 UTCJul 11, 19:56 UTC2h 27m
2026-07-11 SWA1080 - Jul 11, 15:45 UTCJul 11, 16:40 UTC55m
2026-07-11 SWA3020 MSY → STL Jul 11, 12:55 UTCJul 11, 14:15 UTC1h 20m
2026-07-11 SWA3020 MSY → STL Jul 11, 12:53 UTCJul 11, 14:16 UTC1h 23m
2026-07-11 SWA2055 - Jul 11, 03:35 UTCJul 11, 04:20 UTC45m
2026-07-11 SWA2124 - Jul 11, 00:25 UTCJul 11, 02:20 UTC1h 55m
2026-07-10 SWA4923 MCO → IND Jul 10, 21:25 UTCJul 10, 23:25 UTC2h 0m
2026-07-10 SWA599 - Jul 10, 18:30 UTCJul 10, 19:20 UTC50m
2026-07-10 SWA599 NAS → MCO Jul 10, 18:18 UTCJul 10, 19:14 UTC56m
2026-07-10 SWA600 - Jul 10, 16:10 UTCJul 10, 16:45 UTC35m
2026-07-10 SWA4854 DEN → MCO Jul 10, 11:10 UTCJul 10, 14:15 UTC3h 5m
2026-07-10 SWA2394 - Jul 10, 02:40 UTCJul 10, 04:30 UTC1h 50m
2026-07-10 SWA2394 LAX → DEN Jul 10, 02:39 UTCJul 10, 04:26 UTC1h 47m
2026-07-10 SWA2394 SMF → LAX Jul 10, 00:50 UTCJul 10, 01:55 UTC1h 5m
2026-07-09 SWA4552 - Jul 9, 22:50 UTCJul 10, 00:00 UTC1h 10m
2026-07-09 SWA4552 SAN → SMF Jul 9, 22:48 UTCJul 9, 23:58 UTC1h 10m
2026-07-09 SWA2537 - Jul 9, 20:05 UTCJul 9, 21:15 UTC1h 10m
2026-07-09 SWA3546 - Jul 9, 17:35 UTCJul 9, 18:45 UTC1h 10m
2026-07-09 SWA3074 OAK → SAN Jul 9, 15:24 UTCJul 9, 16:34 UTC1h 10m
2026-07-09 SWA3074 - Jul 9, 15:25 UTCJul 9, 16:40 UTC1h 15m
2026-07-09 SWA2415 - Jul 9, 13:10 UTCJul 9, 14:05 UTC55m
2026-07-09 SWA1039 LAS → LAX Jul 9, 06:05 UTCJul 9, 06:45 UTC40m
2026-07-09 SWA548 BNA → LAS Jul 9, 01:45 UTCJul 9, 05:00 UTC3h 15m
2026-07-08 SWA4799 - Jul 8, 21:00 UTCJul 8, 23:00 UTC2h 0m
2026-07-08 SWA2464 - Jul 8, 17:10 UTCJul 8, 19:55 UTC2h 45m
2026-07-08 SWA2464 MDW → MIA Jul 8, 17:08 UTCJul 8, 19:50 UTC2h 43m
2026-07-08 SWA2464 - Jul 8, 12:20 UTCJul 8, 15:50 UTC3h 30m
2026-07-08 SWA1039 - Jul 8, 06:20 UTCJul 8, 07:00 UTC40m

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 N7739A page for operator, model, and routing details .

Mode-S AA77C0 frequently asked

What is Mode-S code AA77C0?
AA77C0 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N7739A.
Where is Mode-S AA77C0 registered?
Mode-S code AA77C0 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 AA77C0 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA77C0, octal 52473700, decimal 11,171,776.
What flights does AA77C0 operate?
Mode-S AA77C0 has broadcast 20 distinct callsigns, including SWA375, SWA2268, SWA921, SWA576, SWA3517.