Apparatus

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sensors Mode-S transponder

AA43C4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N760YX · EMBRAER ERJ-170-200 (long wing) · operated by REPUBLIC AIRWAYS INC

Hex
AA43C4
Octal
52441704
Decimal
11,158,468
Country
US
Tail
N760YX
Type
E75L
No current signal · last broadcast Jul 26, 22:40 UTC
Flights observed
602
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:40 UTC

Last known position

Most recent position reported by Mode-S AA43C4.

Country allocation

The ICAO 24-bit address AA43C4 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
RPA3421 Republic Airlines 9 2026-07-25
RPA3647 - 7 2026-07-02
RPA3596 Republic Airlines 7 2026-07-22
RPA3435 - 7 2026-07-11
RPA3703 Republic Airlines 6 2026-07-25
RPA3694 Republic Airlines 6 2026-07-25
RPA3662 Republic Airlines 6 2026-07-23
RPA3643 Republic Airlines 6 2026-07-26
RPA3625 Republic Airlines 6 2026-07-25
RPA3561 Republic Airlines 6 2026-07-21
RPA3504 - 6 2026-06-28
RPA3494 - 6 2026-07-02
RPA3706 - 5 2026-06-19
RPA3630 Republic Airlines 5 2026-07-19
RPA3624 Republic Airlines 5 2026-07-26
RPA3616 - 5 2026-07-12
RPA3594 - 5 2026-07-18
RPA3583 - 5 2026-06-29
RPA3562 Republic Airlines 5 2026-07-19
RPA3557 Republic Airlines 5 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RPA3624 EWR → ROC Jul 26, 21:55 UTCJul 26, 22:40 UTC45m
2026-07-26 RPA3688 ORD → MCI Jul 26, 19:30 UTCJul 26, 20:25 UTC55m
2026-07-26 RPA3698 RDU → EWR Jul 26, 16:50 UTCJul 26, 17:35 UTC45m
2026-07-26 RPA3402 AVL → EWR Jul 26, 14:20 UTCJul 26, 15:45 UTC1h 25m
2026-07-26 RPA3410 ORD → MSN Jul 26, 12:33 UTCJul 26, 13:08 UTC35m
2026-07-26 RPA3410 ORD → MSN Jul 26, 12:25 UTCJul 26, 13:15 UTC50m
2026-07-26 RPA3626 IAD → LGA Jul 26, 10:15 UTCJul 26, 11:05 UTC50m
2026-07-26 RPA3643 EWR → RDU Jul 26, 02:45 UTCJul 26, 03:30 UTC45m
2026-07-26 RPA3711 ORF → EWR Jul 26, 00:50 UTCJul 26, 01:45 UTC55m
2026-07-25 RPA3557 EWR → YYZ Jul 25, 20:55 UTCJul 25, 22:00 UTC1h 5m
2026-07-25 RPA3557 EWR → YYZ Jul 25, 21:04 UTCJul 25, 21:50 UTC46m
2026-07-25 RPA3694 ORF → IAD Jul 25, 16:25 UTCJul 25, 18:05 UTC1h 40m
2026-07-25 RPA3694 ORF → IAD Jul 25, 16:36 UTCJul 25, 18:02 UTC1h 26m
2026-07-25 RPA3421 CLT → EWR Jul 25, 13:50 UTCJul 25, 15:14 UTC1h 24m
2026-07-25 RPA3421 CLT → EWR Jul 25, 13:35 UTCJul 25, 15:20 UTC1h 45m
2026-07-25 RPA3703 YQB → EWR Jul 25, 10:15 UTCJul 25, 11:35 UTC1h 20m
2026-07-25 RPA3625 EWR → ROC Jul 25, 01:25 UTCJul 25, 02:35 UTC1h 10m
2026-07-25 RPA3625 EWR → ROC Jul 25, 01:16 UTCJul 25, 02:30 UTC1h 14m
2026-07-24 RPA3468 CVG → EWR Jul 24, 22:15 UTCJul 24, 23:35 UTC1h 20m
2026-07-24 RPA3533 GSP → EWR Jul 24, 19:26 UTCJul 24, 20:31 UTC1h 5m
2026-07-24 RPA3533 GSP → EWR Jul 24, 19:10 UTCJul 24, 20:35 UTC1h 25m
2026-07-24 RPA3701 GSP → EWR Jul 24, 16:02 UTCJul 24, 17:56 UTC1h 54m
2026-07-24 RPA3701 GSP → EWR Jul 24, 16:50 UTCJul 24, 18:00 UTC1h 10m
2026-07-24 RPA3423 CMH → EWR Jul 24, 14:00 UTCJul 24, 14:45 UTC45m
2026-07-24 RPA3423 CMH → EWR Jul 24, 13:45 UTCJul 24, 14:45 UTC1h 0m
2026-07-24 RPA3700 IND → IAD Jul 24, 10:40 UTCJul 24, 12:05 UTC1h 25m
2026-07-24 RPA3606 PIT → EWR Jul 24, 04:20 UTCJul 24, 05:50 UTC1h 30m
2026-07-24 RPA3527 EWR → SDF Jul 24, 01:30 UTCJul 24, 02:55 UTC1h 25m
2026-07-23 RPA3532 BNA → EWR Jul 23, 23:25 UTCJul 24, 00:10 UTC45m
2026-07-23 RPA3662 GSP → EWR Jul 23, 20:20 UTCJul 23, 21:25 UTC1h 5m
2026-07-23 RPA3662 GSP → EWR Jul 23, 20:26 UTCJul 23, 21:12 UTC46m
2026-07-23 RPA3432 BUF → EWR Jul 23, 17:55 UTCJul 23, 18:55 UTC1h 0m
2026-07-23 RPA3485 DCA → EWR Jul 23, 15:45 UTCJul 23, 16:35 UTC50m
2026-07-23 RPA3485 DCA → EWR Jul 23, 15:37 UTCJul 23, 16:18 UTC41m
2026-07-23 RPA3417 EWR → JAX Jul 23, 12:55 UTCJul 23, 14:35 UTC1h 40m
2026-07-23 RPA3604 EWR → PHL Jul 23, 10:00 UTCJul 23, 11:10 UTC1h 10m
2026-07-23 RPA3627 SDF → EWR Jul 23, 03:20 UTCJul 23, 04:00 UTC40m
2026-07-22 RPA3644 EWR → PHL Jul 22, 23:25 UTCJul 23, 00:40 UTC1h 15m
2026-07-22 RPA3644 EWR → PHL Jul 22, 23:20 UTCJul 23, 00:35 UTC1h 15m
2026-07-22 RPA3596 EWR → PIT Jul 22, 20:47 UTCJul 22, 21:52 UTC1h 5m
2026-07-22 RPA3596 EWR → PIT Jul 22, 20:35 UTCJul 22, 22:00 UTC1h 25m
2026-07-22 RPA3405 AVL → EWR Jul 22, 16:55 UTCJul 22, 18:25 UTC1h 30m
2026-07-21 RPA3303 - Jul 21, 22:15 UTCJul 21, 22:55 UTC40m
2026-07-21 RPA3314 IND → DTW Jul 21, 14:50 UTCJul 21, 15:35 UTC45m
2026-07-21 RPA3561 ORD → MSY Jul 21, 12:30 UTCJul 21, 13:50 UTC1h 20m
2026-07-21 RPA3438 BUF → EWR Jul 21, 10:05 UTCJul 21, 11:20 UTC1h 15m
2026-07-20 RPA3598 - Jul 20, 23:45 UTCJul 21, 00:30 UTC45m
2026-07-20 RPA3440 BUF → EWR Jul 20, 20:25 UTCJul 20, 21:35 UTC1h 10m
2026-07-20 RPA3634 - Jul 20, 17:45 UTCJul 20, 18:45 UTC1h 0m
2026-07-20 RPA3634 ORD → BNA Jul 20, 18:00 UTCJul 20, 18:51 UTC51m

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 N760YX page for operator, model, and routing details .

Mode-S AA43C4 frequently asked

What is Mode-S code AA43C4?
AA43C4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N760YX.
Where is Mode-S AA43C4 registered?
Mode-S code AA43C4 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 AA43C4 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA43C4, octal 52441704, decimal 11,158,468.
What flights does AA43C4 operate?
Mode-S AA43C4 has broadcast 20 distinct callsigns, including RPA3421, RPA3647, RPA3596, RPA3435, RPA3703.