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sensors Mode-S transponder

A700A4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N550NN · BOMBARDIER Regional Jet CRJ-900 · operated by AMERICAN AIRLINES INC

Hex
A700A4
Octal
51600244
Decimal
10,944,676
Country
US
Tail
N550NN
Type
CRJ9
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
713
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S A700A4.

Country allocation

The ICAO 24-bit address A700A4 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
JIA5151 - 15 2026-06-28
JIA5579 - 11 2026-07-13
JIA5104 PSA Airlines 11 2026-05-12
JIA5166 PSA Airlines 9 2026-06-12
JIA5349 - 8 2026-06-29
JIA5243 - 8 2026-07-15
JIA5173 - 7 2026-07-05
JIA5142 PSA Airlines 7 2026-05-22
JIA5590 - 6 2026-07-05
JIA5587 - 6 2026-06-27
JIA5586 - 6 2026-06-27
JIA5454 PSA Airlines 6 2026-06-06
JIA5370 - 6 2026-07-11
JIA5336 PSA Airlines 6 2026-04-30
JIA5262 - 6 2026-07-12
JIA5217 - 6 2026-07-13
JIA5131 PSA Airlines 6 2026-06-05
JIA5658 PSA Airlines 5 2026-07-20
JIA5607 PSA Airlines 5 2026-05-03
JIA5532 - 5 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JIA5471 PHL → CMH Jul 26, 21:00 UTCJul 26, 22:40 UTC1h 40m
2026-07-26 JIA5457 CLT → MHT Jul 26, 18:15 UTCJul 26, 20:00 UTC1h 45m
2026-07-26 JIA5036 CLT → CMH Jul 26, 14:30 UTCJul 26, 15:20 UTC50m
2026-07-26 JIA9955 MEM → DCA Jul 26, 12:50 UTCJul 26, 13:40 UTC50m
2026-07-26 JIA5548 TLH → CLT Jul 26, 10:35 UTCJul 26, 11:50 UTC1h 15m
2026-07-25 JIA5544 DCA → PNS Jul 25, 23:20 UTCJul 26, 01:10 UTC1h 50m
2026-07-25 JIA5636 RIC → PHL Jul 25, 20:35 UTCJul 25, 21:05 UTC30m
2026-07-25 JIA5474 MHT → CLT Jul 25, 18:10 UTCJul 25, 18:40 UTC30m
2026-07-25 JIA5527 PWM → DCA Jul 25, 15:30 UTCJul 25, 16:25 UTC55m
2026-07-25 JIA5562 BHM → DCA Jul 25, 12:00 UTCJul 25, 13:55 UTC1h 55m
2026-07-25 JIA5608 DCA → GSP Jul 25, 01:40 UTCJul 25, 03:20 UTC1h 40m
2026-07-25 JIA5608 DCA → GSP Jul 25, 01:38 UTCJul 25, 03:19 UTC1h 41m
2026-07-24 JIA5343 DCA → MSP Jul 24, 21:25 UTCJul 24, 22:44 UTC1h 19m
2026-07-24 JIA5500 LIT → CLT Jul 24, 19:00 UTCJul 24, 20:35 UTC1h 35m
2026-07-24 JIA5136 CLT → JAN Jul 24, 16:25 UTCJul 24, 17:05 UTC40m
2026-07-24 JIA5624 PHL → MCI Jul 24, 13:30 UTCJul 24, 15:10 UTC1h 40m
2026-07-24 JIA5654 BGR → CLT Jul 24, 11:38 UTCJul 24, 11:54 UTC16m
2026-07-23 JIA5618 CLT → LEX Jul 23, 22:25 UTCJul 23, 23:50 UTC1h 25m
2026-07-23 JIA5210 VPS → PHL Jul 23, 19:55 UTCJul 23, 20:55 UTC1h 0m
2026-07-23 JIA5210 VPS → PHL Jul 23, 17:50 UTCJul 23, 19:00 UTC1h 10m
2026-07-23 JIA5640 CLT → SDF Jul 23, 14:45 UTCJul 23, 15:45 UTC1h 0m
2026-07-23 JIA5640 CLT → SDF Jul 23, 12:35 UTCJul 23, 13:40 UTC1h 5m
2026-07-23 JIA5438 PHL → GSP Jul 23, 10:15 UTCJul 23, 11:30 UTC1h 15m
2026-07-23 JIA5438 PHL → GSP Jul 23, 10:12 UTCJul 23, 11:27 UTC1h 15m
2026-07-22 JIA5534 BHM → PHL Jul 22, 22:30 UTCJul 22, 23:50 UTC1h 20m
2026-07-22 JIA5074 DAY → CLT Jul 22, 13:55 UTCJul 22, 16:00 UTC2h 5m
2026-07-21 JIA9954 PHL → CKB Jul 21, 19:10 UTCJul 21, 20:10 UTC1h 0m
2026-07-21 JIA5018 PHL → MKE Jul 21, 16:10 UTCJul 21, 18:10 UTC2h 0m
2026-07-21 JIA5494 PIT → PHL Jul 21, 10:50 UTCJul 21, 12:05 UTC1h 15m
2026-07-21 JIA5494 PIT → PHL Jul 21, 10:45 UTCJul 21, 12:05 UTC1h 20m
2026-07-21 JIA5493 PHL → GRR Jul 21, 02:33 UTCJul 21, 04:08 UTC1h 35m
2026-07-21 JIA5493 - Jul 21, 02:25 UTCJul 21, 04:10 UTC1h 45m
2026-07-20 JIA5183 IND → DCA Jul 20, 23:40 UTCJul 21, 00:30 UTC50m
2026-07-20 JIA5183 IND → DCA Jul 20, 21:55 UTCJul 20, 22:45 UTC50m
2026-07-20 JIA5658 PHL → GSP Jul 20, 18:20 UTCJul 20, 20:25 UTC2h 5m
2026-07-20 JIA5658 PHL → GSP Jul 20, 14:55 UTCJul 20, 17:20 UTC2h 25m
2026-07-20 JIA5486 - Jul 20, 11:10 UTCJul 20, 12:40 UTC1h 30m
2026-07-20 JIA5483 - Jul 20, 05:00 UTCJul 20, 06:40 UTC1h 40m
2026-07-20 JIA5532 - Jul 20, 02:35 UTCJul 20, 04:10 UTC1h 35m
2026-07-19 JIA5532 PHL → MSN Jul 19, 23:55 UTCJul 20, 01:45 UTC1h 50m
2026-07-19 JIA5658 MSP → PHL Jul 19, 18:35 UTCJul 19, 20:40 UTC2h 5m
2026-07-19 JIA5658 - Jul 19, 15:00 UTCJul 19, 17:25 UTC2h 25m
2026-07-19 JIA5658 - Jul 19, 14:35 UTCJul 19, 14:40 UTC5m
2026-07-18 JIA5130 - Jul 18, 13:25 UTCJul 18, 14:45 UTC1h 20m
2026-07-15 JIA9953 - Jul 15, 21:35 UTCJul 15, 23:30 UTC1h 55m
2026-07-15 JIA5243 - Jul 15, 14:35 UTCJul 15, 15:45 UTC1h 10m
2026-07-15 JIA5243 - Jul 15, 12:25 UTCJul 15, 13:10 UTC45m
2026-07-15 JIA5408 - Jul 15, 01:55 UTCJul 15, 03:45 UTC1h 50m
2026-07-14 JIA5408 - Jul 14, 23:20 UTCJul 15, 01:10 UTC1h 50m
2026-07-14 JA5241 AUS → DFW Jul 14, 20:50 UTCJul 14, 21:55 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 N550NN page for operator, model, and routing details .

Mode-S A700A4 frequently asked

What is Mode-S code A700A4?
A700A4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N550NN.
Where is Mode-S A700A4 registered?
Mode-S code A700A4 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 A700A4 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A700A4, octal 51600244, decimal 10,944,676.
What flights does A700A4 operate?
Mode-S A700A4 has broadcast 20 distinct callsigns, including JIA5151, JIA5579, JIA5104, JIA5166, JIA5349.