Apparatus

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sensors Mode-S transponder

AA779D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N7738A · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
AA779D
Octal
52473635
Decimal
11,171,741
Country
US
Tail
N7738A
Type
B737
No current signal · last broadcast Jul 26, 21:10 UTC
Flights observed
746
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:10 UTC

Last known position

Most recent position reported by Mode-S AA779D.

Country allocation

The ICAO 24-bit address AA779D 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
SWA1989 Southwest Airlines 7 2026-07-26
SWA644 - 6 2026-06-24
SWA3144 Southwest Airlines 6 2026-04-17
SWA576 Southwest Airlines 5 2026-04-30
SWA3336 - 5 2026-06-19
SWA2748 - 5 2026-04-13
SWA1276 - 5 2026-06-16
SWA819 - 4 2026-06-29
SWA781 Southwest Airlines 4 2026-05-10
SWA724 Southwest Airlines 4 2026-07-07
SWA4724 Southwest Airlines 4 2026-06-06
SWA389 Southwest Airlines 4 2026-06-09
SWA3638 - 4 2026-07-09
SWA3509 - 4 2026-07-09
SWA3472 Southwest Airlines 4 2026-04-23
SWA3463 - 4 2026-04-13
SWA3334 - 4 2026-07-09
SWA3176 Southwest Airlines 4 2026-05-23
SWA2963 Southwest Airlines 4 2026-04-15
SWA2899 Southwest Airlines 4 2026-05-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA1057 BUR → SLC Jul 26, 20:05 UTCJul 26, 21:10 UTC1h 5m
2026-07-26 SWA1057 BUR → SLC Jul 26, 18:05 UTCJul 26, 18:50 UTC45m
2026-07-26 SWA1800 MDW → OAK Jul 26, 15:50 UTCJul 26, 17:10 UTC1h 20m
2026-07-26 SWA4481 SAN → BWI Jul 26, 13:00 UTCJul 26, 14:10 UTC1h 10m
2026-07-26 SWA4481 SAN → BWI Jul 26, 12:59 UTCJul 26, 14:21 UTC1h 22m
2026-07-26 SWA1989 DEN → ORD Jul 26, 02:25 UTCJul 26, 05:10 UTC2h 45m
2026-07-26 SWA1989 DEN → ORD Jul 26, 02:22 UTCJul 26, 05:13 UTC2h 52m
2026-07-26 SWA3027 DEN → SJC Jul 26, 00:20 UTCJul 26, 01:20 UTC1h 0m
2026-07-25 SWA2077 SJU → BWI Jul 25, 21:50 UTCJul 25, 22:40 UTC50m
2026-07-25 SWA2077 SJU → BWI Jul 25, 21:46 UTCJul 25, 22:49 UTC1h 3m
2026-07-25 SWA1367 PLS → BWI Jul 25, 16:44 UTCJul 25, 19:40 UTC2h 56m
2026-07-25 SWA1367 - Jul 25, 12:20 UTCJul 25, 19:50 UTC7h 30m
2026-07-25 SWA2141 PHL → MDW Jul 25, 10:10 UTCJul 25, 11:10 UTC1h 0m
2026-07-25 SWA4321 LAS → ELP Jul 25, 02:40 UTCJul 25, 03:20 UTC40m
2026-07-25 SWA4321 LAS → ELP Jul 25, 02:35 UTCJul 25, 03:15 UTC40m
2026-07-25 SWA478 OAK → SAN Jul 25, 00:25 UTCJul 25, 01:30 UTC1h 5m
2026-07-24 SWA478 OAK → SAN Jul 24, 22:25 UTCJul 24, 23:20 UTC55m
2026-07-24 SWA478 OAK → SAN Jul 24, 19:20 UTCJul 24, 20:50 UTC1h 30m
2026-07-24 SWA3395 PHX → SJC Jul 24, 17:10 UTCJul 24, 18:20 UTC1h 10m
2026-07-24 SWA3796 HNL → OAK Jul 24, 14:40 UTCJul 24, 16:10 UTC1h 30m
2026-07-24 SWA3796 HNL → OAK Jul 24, 11:50 UTCJul 24, 13:35 UTC1h 45m
2026-07-24 SWA257 RNO → LAS Jul 24, 06:15 UTCJul 24, 09:45 UTC3h 30m
2026-07-24 SWA1402 LAS → BLI Jul 24, 02:05 UTCJul 24, 04:25 UTC2h 20m
2026-07-24 SWA1402 LAS → BLI Jul 24, 00:20 UTCJul 24, 01:00 UTC40m
2026-07-23 SWA1402 LAS → BLI Jul 23, 21:15 UTCJul 23, 23:20 UTC2h 5m
2026-07-23 SWA1440 LAS → OAK Jul 23, 17:40 UTCJul 23, 19:55 UTC2h 15m
2026-07-23 SWA1908 - Jul 23, 14:00 UTCJul 23, 16:15 UTC2h 15m
2026-07-23 SWA212 AUS → BNA Jul 23, 11:50 UTCJul 23, 12:55 UTC1h 5m
2026-07-23 SWA2179 LAS → ATL Jul 23, 06:15 UTCJul 23, 09:45 UTC3h 30m
2026-07-23 SWA2179 LAS → ATL Jul 23, 06:15 UTCJul 23, 09:48 UTC3h 34m
2026-07-23 SWA799 MDW → BOS Jul 23, 03:50 UTCJul 23, 04:35 UTC45m
2026-07-23 SWA799 MDW → BOS Jul 23, 03:48 UTCJul 23, 04:30 UTC42m
2026-07-23 SWA2202 SFO → BUR Jul 23, 02:10 UTCJul 23, 02:55 UTC45m
2026-07-22 SWA4240 SJC → SAN Jul 22, 22:25 UTCJul 23, 00:55 UTC2h 30m
2026-07-22 SWA4240 SJC → SAN Jul 22, 20:10 UTCJul 22, 21:25 UTC1h 15m
2026-07-22 SWA4725 RSW → BDL Jul 22, 17:40 UTCJul 22, 19:00 UTC1h 20m
2026-07-22 SWA4725 RSW → BDL Jul 22, 17:37 UTCJul 22, 18:54 UTC1h 17m
2026-07-22 SWA383 LAX → SJC Jul 22, 15:35 UTCJul 22, 16:45 UTC1h 10m
2026-07-22 SWA2518 BWI → ALB Jul 22, 13:20 UTCJul 22, 14:10 UTC50m
2026-07-22 SWA2845 RDU → BWI Jul 22, 02:10 UTCJul 22, 03:15 UTC1h 5m
2026-07-22 SWA2845 RDU → BWI Jul 22, 02:05 UTCJul 22, 03:10 UTC1h 5m
2026-07-22 SWA4073 - Jul 22, 00:00 UTCJul 22, 01:10 UTC1h 10m
2026-07-21 SWA4073 PIT → MDW Jul 21, 23:59 UTCJul 22, 01:06 UTC1h 7m
2026-07-21 SWA3451 - Jul 21, 21:10 UTCJul 21, 23:10 UTC2h 0m
2026-07-21 SWA3451 MCO → PIT Jul 21, 21:06 UTCJul 21, 23:10 UTC2h 4m
2026-07-21 SWA908 SAN → OAK Jul 21, 17:45 UTCJul 21, 19:45 UTC2h 0m
2026-07-21 SWA908 SAN → OAK Jul 21, 15:45 UTCJul 21, 16:50 UTC1h 5m
2026-07-21 SWA2973 MSP → STL Jul 21, 13:05 UTCJul 21, 14:10 UTC1h 5m
2026-07-21 SWA2973 MSP → STL Jul 21, 13:05 UTCJul 21, 14:04 UTC59m
2026-07-21 SWA4085 LAS → OAK Jul 21, 04:20 UTCJul 21, 05:25 UTC1h 5m

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 N7738A page for operator, model, and routing details .

Mode-S AA779D frequently asked

What is Mode-S code AA779D?
AA779D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N7738A.
Where is Mode-S AA779D registered?
Mode-S code AA779D 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 AA779D 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 AA779D, octal 52473635, decimal 11,171,741.
What flights does AA779D operate?
Mode-S AA779D has broadcast 20 distinct callsigns, including SWA1989, SWA644, SWA3144, SWA576, SWA3336.