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sensors Mode-S transponder

AA72F5

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N7721E · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
AA72F5
Octal
52471365
Decimal
11,170,549
Country
US
Tail
N7721E
Type
B737
No current signal · last broadcast 1h ago
Flights observed
713
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S AA72F5.

Country allocation

The ICAO 24-bit address AA72F5 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
SWA19 - 8 2026-07-10
SWA4724 - 7 2026-07-14
SWA3731 Southwest Airlines 6 2026-04-18
SWA2775 - 6 2026-06-30
SWA2395 Southwest Airlines 6 2026-05-12
SWA694 - 5 2026-06-23
SWA3743 - 5 2026-07-07
SWA371 - 5 2026-07-03
SWA345 - 5 2026-06-30
SWA2635 Southwest Airlines 5 2026-05-20
SWA1426 - 5 2026-06-21
SWA1003 Southwest Airlines 5 2026-05-24
SWA921 - 4 2026-06-22
SWA871 Southwest Airlines 4 2026-06-26
SWA57 Southwest Airlines 4 2026-06-26
SWA4262 - 4 2026-07-08
SWA342 - 4 2026-06-20
SWA301 Southwest Airlines 4 2026-05-08
SWA2815 - 4 2026-04-14
SWA2679 - 4 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 SWA2617 DAL → SAT Jul 15, 03:15 UTCJul 15, 03:55 UTC40m
2026-07-14 SWA4282 SFO → DAL Jul 14, 22:50 UTCJul 15, 02:05 UTC3h 15m
2026-07-14 SWA2165 BUR → SFO Jul 14, 20:15 UTCJul 14, 21:05 UTC50m
2026-07-14 SWA2165 BUR → SFO Jul 14, 20:12 UTCJul 14, 21:01 UTC49m
2026-07-14 SWA106 LAS → BUR Jul 14, 18:25 UTCJul 14, 19:10 UTC45m
2026-07-14 SWA106 LAS → BUR Jul 14, 18:23 UTCJul 14, 19:06 UTC43m
2026-07-14 SWA4724 BUR → LAS Jul 14, 16:40 UTCJul 14, 17:30 UTC50m
2026-07-14 SWA4724 BUR → LAS Jul 14, 16:40 UTCJul 14, 17:20 UTC40m
2026-07-14 SWA4245 - Jul 14, 14:35 UTCJul 14, 15:40 UTC1h 5m
2026-07-14 SWA3651 SFO → PHX Jul 14, 05:20 UTCJul 14, 07:00 UTC1h 40m
2026-07-13 SWA833 BUR → SFO Jul 13, 23:45 UTCJul 14, 00:35 UTC50m
2026-07-13 SWA4540 LAS → BUR Jul 13, 22:00 UTCJul 13, 22:45 UTC45m
2026-07-13 SWA3151 - Jul 13, 19:55 UTCJul 13, 20:40 UTC45m
2026-07-13 SWA3151 - Jul 13, 18:00 UTCJul 13, 18:55 UTC55m
2026-07-13 SWA2431 - Jul 13, 16:30 UTCJul 13, 17:15 UTC45m
2026-07-13 SWA1840 SMF → LAX Jul 13, 14:25 UTCJul 13, 15:40 UTC1h 15m
2026-07-13 SWA1840 SMF → LAX Jul 13, 14:25 UTCJul 13, 15:30 UTC1h 5m
2026-07-13 SWA1840 EUG → SMF Jul 13, 12:15 UTCJul 13, 13:15 UTC1h 0m
2026-07-13 SWA3821 - Jul 13, 03:20 UTCJul 13, 05:15 UTC1h 55m
2026-07-13 SWA3821 DEN → EUG Jul 13, 03:17 UTCJul 13, 05:21 UTC2h 4m
2026-07-13 SWA2425 - Jul 13, 00:55 UTCJul 13, 02:05 UTC1h 10m
2026-07-13 SWA2425 OMA → DEN Jul 13, 00:50 UTCJul 13, 01:58 UTC1h 8m
2026-07-12 SWA2425 - Jul 12, 21:25 UTCJul 12, 23:35 UTC2h 10m
2026-07-12 SWA1411 - Jul 12, 18:25 UTCJul 12, 20:10 UTC1h 45m
2026-07-12 SWA1411 DAL → STL Jul 12, 16:15 UTCJul 12, 17:35 UTC1h 20m
2026-07-12 SWA4686 - Jul 12, 12:25 UTCJul 12, 13:50 UTC1h 25m
2026-07-12 SWA1251 - Jul 12, 01:55 UTCJul 12, 03:15 UTC1h 20m
2026-07-12 SWA1251 MDW → BHM Jul 12, 01:55 UTCJul 12, 03:21 UTC1h 26m
2026-07-11 SWA2679 - Jul 11, 22:55 UTCJul 12, 00:35 UTC1h 40m
2026-07-11 SWA2679 - Jul 11, 19:25 UTCJul 11, 21:35 UTC2h 10m
2026-07-11 SWA3222 PHL → MCO Jul 11, 16:08 UTCJul 11, 18:00 UTC1h 53m
2026-07-11 SWA3222 PHL → MCO Jul 11, 16:10 UTCJul 11, 18:15 UTC2h 5m
2026-07-11 SWA3222 - Jul 11, 13:10 UTCJul 11, 14:50 UTC1h 40m
2026-07-11 SWA463 - Jul 11, 10:20 UTCJul 11, 11:10 UTC50m
2026-07-11 SWA4279 MDW → DSM Jul 11, 04:05 UTCJul 11, 04:50 UTC45m
2026-07-11 SWA4279 LGB → DAL Jul 11, 04:01 UTCJul 11, 04:48 UTC47m
2026-07-11 SWA999 - Jul 11, 01:40 UTCJul 11, 03:20 UTC1h 40m
2026-07-10 SWA999 - Jul 10, 22:25 UTCJul 11, 00:25 UTC2h 0m
2026-07-10 SWA4253 - Jul 10, 19:00 UTCJul 10, 19:15 UTC15m
2026-07-10 SWA4253 HOU → FLL Jul 10, 18:55 UTCJul 10, 21:13 UTC2h 18m
2026-07-10 SWA19 - Jul 10, 17:10 UTCJul 10, 17:55 UTC45m
2026-07-10 SWA19 - Jul 10, 15:35 UTCJul 10, 16:15 UTC40m
2026-07-10 SWA19 - Jul 10, 13:45 UTCJul 10, 14:30 UTC45m
2026-07-10 SWA2111 - Jul 10, 11:15 UTCJul 10, 12:40 UTC1h 25m
2026-07-10 SWA2111 IND → BNA Jul 10, 11:13 UTCJul 10, 12:30 UTC1h 17m
2026-07-10 SWA3190 - Jul 10, 03:40 UTCJul 10, 04:15 UTC35m
2026-07-10 SWA3190 MDW → IND Jul 10, 03:36 UTCJul 10, 04:08 UTC32m
2026-07-10 SWA233 ATL → MDW Jul 10, 01:20 UTCJul 10, 02:50 UTC1h 30m
2026-07-09 SWA3882 - Jul 9, 22:50 UTCJul 10, 00:05 UTC1h 15m
2026-07-09 SWA3882 STL → ATL Jul 9, 22:47 UTCJul 9, 23:58 UTC1h 11m

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 N7721E page for operator, model, and routing details .

Mode-S AA72F5 frequently asked

What is Mode-S code AA72F5?
AA72F5 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N7721E.
Where is Mode-S AA72F5 registered?
Mode-S code AA72F5 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 AA72F5 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA72F5, octal 52471365, decimal 11,170,549.
What flights does AA72F5 operate?
Mode-S AA72F5 has broadcast 20 distinct callsigns, including SWA19, SWA4724, SWA3731, SWA2775, SWA2395.