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sensors Mode-S transponder

A03F84

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N115HQ · EMBRAER ERJ-170-200 (long wing) · operated by REPUBLIC AIRWAYS INC

Hex
A03F84
Octal
50037604
Decimal
10,502,020
Country
US
Tail
N115HQ
Type
E75L
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
715
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S A03F84.

Country allocation

The ICAO 24-bit address A03F84 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
RPA4747 Republic Airlines 12 2026-06-16
RPA4378 Republic Airlines 10 2026-07-25
RPA4618 - 9 2026-07-07
RPA4396 Republic Airlines 9 2026-06-22
RPA4375 - 8 2026-07-15
RPA4555 - 7 2026-07-07
RPA4515 Republic Airlines 7 2026-05-11
RPA4494 Republic Airlines 7 2026-07-23
RPA4491 - 7 2026-07-15
RPA4430 - 7 2026-06-26
RPA4428 Republic Airlines 7 2026-07-20
RPA4701 - 6 2026-06-26
RPA4524 Republic Airlines 6 2026-07-20
RPA4501 Republic Airlines 6 2026-07-23
RPA4500 Republic Airlines 6 2026-07-17
RPA4427 - 6 2026-07-17
RPA4411 - 6 2026-07-14
RPA4756 Republic Airlines 5 2026-06-15
RPA4722 - 5 2026-07-15
RPA4716 - 5 2026-04-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RPA4389 DCA → PVD Jul 26, 21:15 UTCJul 26, 22:45 UTC1h 30m
2026-07-26 RPA4389 DCA → PVD Jul 26, 18:45 UTCJul 26, 20:00 UTC1h 15m
2026-07-26 RPA4366 DCA → MEM Jul 26, 16:35 UTCJul 26, 17:15 UTC40m
2026-07-26 RPA4708 DCA → MCI Jul 26, 14:55 UTCJul 26, 15:15 UTC20m
2026-07-26 RPA4708 DCA → MCI Jul 26, 13:00 UTCJul 26, 13:30 UTC30m
2026-07-26 RPA4788 LGA → OMA Jul 26, 10:25 UTCJul 26, 11:30 UTC1h 5m
2026-07-25 RPA4378 BOS → JFK Jul 25, 21:50 UTCJul 25, 22:40 UTC50m
2026-07-25 RPA4565 DCA → PWM Jul 25, 19:10 UTCJul 25, 20:05 UTC55m
2026-07-25 RPA4565 DCA → PWM Jul 25, 19:07 UTCJul 25, 19:58 UTC51m
2026-07-25 RPA4565 DCA → PWM Jul 25, 17:40 UTCJul 25, 18:10 UTC30m
2026-07-25 RPA4581 MEM → LGA Jul 25, 12:15 UTCJul 25, 15:00 UTC2h 45m
2026-07-25 RPA4581 MEM → LGA Jul 25, 12:12 UTCJul 25, 14:59 UTC2h 47m
2026-07-24 RPA4341 DCA → SYR Jul 24, 23:35 UTCJul 25, 02:20 UTC2h 45m
2026-07-24 RPA4341 DCA → SYR Jul 24, 23:34 UTCJul 25, 02:16 UTC2h 42m
2026-07-24 RPA4348 DTW → PHL Jul 24, 21:20 UTCJul 24, 22:30 UTC1h 10m
2026-07-24 RPA4348 DTW → PHL Jul 24, 19:30 UTCJul 24, 20:30 UTC1h 0m
2026-07-24 RPA4364 MSP → PHL Jul 24, 16:05 UTCJul 24, 18:00 UTC1h 55m
2026-07-24 RPA4364 MSP → PHL Jul 24, 13:10 UTCJul 24, 15:00 UTC1h 50m
2026-07-24 RPA4477 DTW → LGA Jul 24, 10:15 UTCJul 24, 11:30 UTC1h 15m
2026-07-24 RPA4598 LGA → DTW Jul 24, 01:05 UTCJul 24, 02:20 UTC1h 15m
2026-07-23 RPA4421 MSY → PHL Jul 23, 22:30 UTCJul 23, 23:45 UTC1h 15m
2026-07-23 RPA4421 MSY → PHL Jul 23, 22:27 UTCJul 23, 23:41 UTC1h 14m
2026-07-23 RPA4421 MSY → PHL Jul 23, 20:05 UTCJul 23, 21:25 UTC1h 20m
2026-07-23 RPA4501 IND → DCA Jul 23, 17:55 UTCJul 23, 19:00 UTC1h 5m
2026-07-23 RPA4501 IND → DCA Jul 23, 15:35 UTCJul 23, 16:35 UTC1h 0m
2026-07-23 RPA4494 BOS → DCA Jul 23, 13:15 UTCJul 23, 14:20 UTC1h 5m
2026-07-23 RPA4494 BOS → DCA Jul 23, 10:45 UTCJul 23, 12:00 UTC1h 15m
2026-07-23 RPA4660 JFK → PIT Jul 23, 03:15 UTCJul 23, 03:50 UTC35m
2026-07-23 RPA4402 IND → ORD Jul 23, 01:30 UTCJul 23, 02:20 UTC50m
2026-07-22 RPA4402 IND → ORD Jul 22, 23:50 UTCJul 23, 00:45 UTC55m
2026-07-22 RPA4685 LGA → CHO Jul 22, 20:15 UTCJul 22, 21:10 UTC55m
2026-07-22 RPA4422 - Jul 22, 17:10 UTCJul 22, 18:35 UTC1h 25m
2026-07-22 RPA4422 GSP → LGA Jul 22, 17:06 UTCJul 22, 18:32 UTC1h 26m
2026-07-22 RPA4422 - Jul 22, 14:10 UTCJul 22, 15:50 UTC1h 40m
2026-07-21 RRA4415 - Jul 21, 17:15 UTCJul 21, 18:45 UTC1h 30m
2026-07-21 RRA4415 LGA → DTW Jul 21, 14:00 UTCJul 21, 16:10 UTC2h 10m
2026-07-21 RPA4451 RIC → LGA Jul 21, 10:10 UTCJul 21, 10:55 UTC45m
2026-07-21 RPA4345 - Jul 21, 02:20 UTCJul 21, 03:10 UTC50m
2026-07-20 RPA4524 MSP → LGA Jul 20, 21:55 UTCJul 21, 00:35 UTC2h 40m
2026-07-20 RPA4524 MSP → LGA Jul 20, 18:00 UTCJul 20, 20:45 UTC2h 45m
2026-07-20 RPA4428 LGA → LIT Jul 20, 15:55 UTCJul 20, 17:00 UTC1h 5m
2026-07-20 RPA4428 LGA → LIT Jul 20, 13:50 UTCJul 20, 15:00 UTC1h 10m
2026-07-20 RPA4682 ILM → LGA Jul 20, 10:25 UTCJul 20, 11:35 UTC1h 10m
2026-07-20 RPA4792 - Jul 20, 00:55 UTCJul 20, 02:30 UTC1h 35m
2026-07-19 RPA4437 IND → LGA Jul 19, 21:20 UTCJul 19, 22:50 UTC1h 30m
2026-07-19 RPA4636 BOS → DCA Jul 19, 18:15 UTCJul 19, 20:25 UTC2h 10m
2026-07-19 RPA4582 BOS → IND Jul 19, 14:45 UTCJul 19, 16:55 UTC2h 10m
2026-07-19 RPA4582 BOS → IND Jul 19, 11:20 UTCJul 19, 13:55 UTC2h 35m
2026-07-18 RPA9697 MSP → LGA Jul 18, 21:45 UTCJul 18, 23:30 UTC1h 45m
2026-07-18 RPA4452 DCA → IND Jul 18, 18:55 UTCJul 18, 20:20 UTC1h 25m

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 N115HQ page for operator, model, and routing details .

Mode-S A03F84 frequently asked

What is Mode-S code A03F84?
A03F84 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N115HQ.
Where is Mode-S A03F84 registered?
Mode-S code A03F84 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 A03F84 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 A03F84, octal 50037604, decimal 10,502,020.
What flights does A03F84 operate?
Mode-S A03F84 has broadcast 20 distinct callsigns, including RPA4747, RPA4378, RPA4618, RPA4396, RPA4375.