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sensors Mode-S transponder

A77721

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N580NN · BOMBARDIER Regional Jet CRJ-900 · operated by AMERICAN AIRLINES INC

Hex
A77721
Octal
51673441
Decimal
10,975,009
Country
US
Tail
N580NN
Type
CRJ9
No current signal · last broadcast Jul 26, 20:55 UTC
Flights observed
701
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:55 UTC

Last known position

Most recent position reported by Mode-S A77721.

Country allocation

The ICAO 24-bit address A77721 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
JIA5579 PSA Airlines 9 2026-07-22
JIA5350 - 8 2026-07-15
JIA5132 PSA Airlines 8 2026-04-18
JIA5378 PSA Airlines 7 2026-05-11
JIA5475 PSA Airlines 6 2026-06-04
JIA5426 - 6 2026-07-17
JIA5367 PSA Airlines 6 2026-07-24
JIA5266 PSA Airlines 6 2026-05-15
JIA5207 PSA Airlines 6 2026-05-14
JIA5151 PSA Airlines 6 2026-05-10
JIA5143 PSA Airlines 6 2026-07-26
JIA5650 - 5 2026-07-05
JIA5648 - 5 2026-07-04
JIA5596 PSA Airlines 5 2026-05-16
JIA5541 - 5 2026-06-16
JIA5490 - 5 2026-06-28
JIA5416 PSA Airlines 5 2026-05-10
JIA5304 PSA Airlines 5 2026-06-01
JIA5294 - 5 2026-06-30
JIA5285 - 5 2026-07-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JIA5397 BHM → PHL Jul 26, 19:55 UTCJul 26, 20:55 UTC1h 0m
2026-07-26 JIA5397 BHM → PHL Jul 26, 17:55 UTCJul 26, 18:50 UTC55m
2026-07-26 JIA5143 PIA → DFW Jul 26, 16:15 UTCJul 26, 16:50 UTC35m
2026-07-26 JIA5143 PIA → DFW Jul 26, 14:35 UTCJul 26, 15:25 UTC50m
2026-07-26 JIA5035 PHL → SYR Jul 26, 09:50 UTCJul 26, 11:45 UTC1h 55m
2026-07-25 JIA5288 DCA → SYR Jul 25, 19:20 UTCJul 25, 21:00 UTC1h 40m
2026-07-25 JIA5377 MSY → CLT Jul 25, 16:30 UTCJul 25, 18:00 UTC1h 30m
2026-07-25 JIA5377 MSY → CLT Jul 25, 16:28 UTCJul 25, 17:58 UTC1h 30m
2026-07-25 JIA5377 MSY → CLT Jul 25, 14:15 UTCJul 25, 15:35 UTC1h 20m
2026-07-25 JIA5036 CLT → CMH Jul 25, 11:10 UTCJul 25, 12:15 UTC1h 5m
2026-07-25 JIA5662 BTV → PHL Jul 25, 00:15 UTCJul 25, 00:45 UTC30m
2026-07-24 JIA5367 DCA → CMH Jul 24, 21:15 UTCJul 24, 22:00 UTC45m
2026-07-24 JIA5367 DCA → CMH Jul 24, 18:40 UTCJul 24, 19:25 UTC45m
2026-07-24 JIA5052 ABE → CLT Jul 24, 16:30 UTCJul 24, 17:30 UTC1h 0m
2026-07-24 JIA5052 ABE → CLT Jul 24, 14:10 UTCJul 24, 15:10 UTC1h 0m
2026-07-24 JIA5440 MEM → PHL Jul 24, 11:15 UTCJul 24, 12:35 UTC1h 20m
2026-07-24 JIA5513 BHM → PHL Jul 24, 04:20 UTCJul 24, 05:40 UTC1h 20m
2026-07-24 JIA5418 CVG → CLT Jul 24, 02:15 UTCJul 24, 03:10 UTC55m
2026-07-24 JIA5418 CVG → CLT Jul 24, 00:10 UTCJul 24, 00:55 UTC45m
2026-07-23 JIA5367 DCA → CMH Jul 23, 22:15 UTCJul 23, 22:55 UTC40m
2026-07-23 JIA5367 DCA → CMH Jul 23, 19:05 UTCJul 23, 19:55 UTC50m
2026-07-23 JIA5527 PWM → DCA Jul 23, 16:25 UTCJul 23, 17:20 UTC55m
2026-07-23 JIA5322 DCA → PHL Jul 23, 12:35 UTCJul 23, 13:50 UTC1h 15m
2026-07-23 JIA5322 DCA → PHL Jul 23, 12:27 UTCJul 23, 13:49 UTC1h 22m
2026-07-23 JIA5291 BGR → PHL Jul 23, 04:35 UTCJul 23, 05:35 UTC1h 0m
2026-07-23 JIA5291 BGR → PHL Jul 23, 04:30 UTCJul 23, 05:44 UTC1h 14m
2026-07-23 JIA5602 ALB → DCA Jul 23, 00:35 UTCJul 23, 01:55 UTC1h 20m
2026-07-22 JIA5602 ALB → DCA Jul 22, 22:45 UTCJul 22, 23:45 UTC1h 0m
2026-07-22 JIA5579 PHL → BUF Jul 22, 18:30 UTCJul 22, 21:00 UTC2h 30m
2026-07-22 JIA5579 PHL → BUF Jul 22, 18:18 UTCJul 22, 20:43 UTC2h 25m
2026-07-22 JIA5579 PHL → BUF Jul 22, 14:15 UTCJul 22, 17:05 UTC2h 50m
2026-07-22 JIA5548 - Jul 22, 11:10 UTCJul 22, 11:50 UTC40m
2026-07-22 JIA5510 CLT → CMH Jul 22, 01:45 UTCJul 22, 03:10 UTC1h 25m
2026-07-22 JIA5510 CLT → CMH Jul 22, 01:40 UTCJul 22, 03:08 UTC1h 28m
2026-07-21 JIA5355 DCA → BGR Jul 21, 22:50 UTCJul 22, 00:15 UTC1h 25m
2026-07-21 JIA5355 DCA → BGR Jul 21, 20:25 UTCJul 21, 21:45 UTC1h 20m
2026-07-21 JIA5103 CLT → LEX Jul 21, 16:45 UTCJul 21, 18:35 UTC1h 50m
2026-07-21 JIA5103 CLT → LEX Jul 21, 13:45 UTCJul 21, 15:40 UTC1h 55m
2026-07-21 JIA5492 GSP → PHL Jul 21, 11:15 UTCJul 21, 12:00 UTC45m
2026-07-21 JIA5492 GSP → PHL Jul 21, 11:14 UTCJul 21, 11:59 UTC45m
2026-07-21 JIA5465 MHT → CLT Jul 21, 05:15 UTCJul 21, 06:00 UTC45m
2026-07-21 JIA5408 STL → DCA Jul 21, 00:10 UTCJul 21, 01:50 UTC1h 40m
2026-07-21 JIA5408 STL → DCA Jul 21, 00:07 UTCJul 21, 01:49 UTC1h 42m
2026-07-20 JIA5408 STL → DCA Jul 20, 21:30 UTCJul 20, 23:15 UTC1h 45m
2026-07-20 JIA5655 STL → DFW Jul 20, 18:15 UTCJul 20, 19:35 UTC1h 20m
2026-07-20 JIA5655 - Jul 20, 15:55 UTCJul 20, 17:15 UTC1h 20m
2026-07-20 JIA5125 - Jul 20, 12:20 UTCJul 20, 14:10 UTC1h 50m
2026-07-20 JIA5125 DAY → DFW Jul 20, 12:17 UTCJul 20, 14:13 UTC1h 56m
2026-07-19 JIA5435 - Jul 19, 23:20 UTCJul 20, 00:20 UTC1h 0m
2026-07-19 JIA5435 CLT → DAY Jul 19, 23:18 UTCJul 20, 00:18 UTC1h 0m

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 N580NN page for operator, model, and routing details .

Mode-S A77721 frequently asked

What is Mode-S code A77721?
A77721 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N580NN.
Where is Mode-S A77721 registered?
Mode-S code A77721 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 A77721 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A77721, octal 51673441, decimal 10,975,009.
What flights does A77721 operate?
Mode-S A77721 has broadcast 20 distinct callsigns, including JIA5579, JIA5350, JIA5132, JIA5378, JIA5475.