Apparatus

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sensors Mode-S transponder

A03BCD

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N114HQ · EMBRAER ERJ-170-200 (long wing) · operated by REPUBLIC AIRWAYS INC

Hex
A03BCD
Octal
50035715
Decimal
10,501,069
Country
US
Tail
N114HQ
Type
E75L
No current signal · last broadcast 11h ago
Flights observed
307
Distinct callsigns
20
Country
US
Last broadcast
11h ago

Last known position

Most recent position reported by Mode-S A03BCD.

Country allocation

The ICAO 24-bit address A03BCD 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
RPA4428 Republic Airlines 7 2026-05-26
RPA4367 Republic Airlines 7 2026-06-17
RPA4620 - 5 2026-06-21
RPA4575 Republic Airlines 5 2026-06-04
RPA4553 - 5 2026-06-18
RPA4415 Republic Airlines 5 2026-06-05
RPA4760 - 4 2026-06-19
RPA4563 Republic Airlines 4 2026-06-02
RPA4524 Republic Airlines 4 2026-06-11
RPA4510 Republic Airlines 4 2026-06-07
RPA4493 Republic Airlines 4 2026-06-13
RPA4437 Republic Airlines 4 2026-06-17
RPA4426 Republic Airlines 4 2026-06-14
RPA4411 Republic Airlines 4 2026-06-20
RPA4344 - 4 2026-06-15
RPA4778 - 3 2026-06-19
RPA4748 Republic Airlines 3 2026-06-06
RPA4734 - 3 2026-06-13
RPA4720 Republic Airlines 3 2026-05-16
RPA4713 Republic Airlines 3 2026-05-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-22 RPA9930 - Jun 22, 16:14 UTCJun 22, 17:20 UTC1h 5m
2026-06-22 RPA4492 DCA → BDL Jun 22, 00:44 UTCJun 22, 03:05 UTC2h 20m
2026-06-21 RPA4436 LGA → RDU Jun 21, 20:50 UTCJun 21, 22:00 UTC1h 10m
2026-06-21 RPA4436 LGA → RDU Jun 21, 20:48 UTCJun 21, 21:59 UTC1h 11m
2026-06-21 RPA4620 - Jun 21, 15:59 UTCJun 21, 18:35 UTC2h 35m
2026-06-21 RPA4620 - Jun 21, 11:55 UTCJun 21, 13:15 UTC1h 20m
2026-06-21 RPA4620 LGA → XNA Jun 21, 11:54 UTCJun 21, 14:35 UTC2h 41m
2026-06-20 RPA4397 - Jun 20, 21:49 UTCJun 21, 00:34 UTC2h 45m
2026-06-20 RPA4397 - Jun 20, 15:54 UTCJun 20, 19:19 UTC3h 25m
2026-06-20 RPA4411 BOS → IND Jun 20, 12:09 UTCJun 20, 13:59 UTC1h 50m
2026-06-20 RPA4392 LGA → BNA Jun 20, 01:34 UTCJun 20, 03:39 UTC2h 5m
2026-06-19 RPA4632 BOS → LGA Jun 19, 22:30 UTCJun 19, 23:09 UTC40m
2026-06-19 RPA4760 - Jun 19, 19:29 UTCJun 19, 20:59 UTC1h 30m
2026-06-19 RPA4760 CVG → BOS Jun 19, 19:25 UTCJun 19, 20:59 UTC1h 34m
2026-06-19 RPA4760 - Jun 19, 16:25 UTCJun 19, 18:34 UTC2h 10m
2026-06-19 RPA4760 BOS → BOS Jun 19, 16:04 UTCJun 19, 16:09 UTC5m
2026-06-19 RPA4716 - Jun 19, 13:29 UTCJun 19, 15:04 UTC1h 35m
2026-06-19 RPA4664 DCA → IND Jun 19, 10:54 UTCJun 19, 12:19 UTC1h 25m
2026-06-19 RPA4778 - Jun 19, 01:34 UTCJun 19, 02:45 UTC1h 10m
2026-06-19 RPA4778 PVD → DCA Jun 19, 01:30 UTCJun 19, 02:42 UTC1h 12m
2026-06-18 RPA4778 DCA → PVD Jun 18, 23:45 UTCJun 19, 00:45 UTC59m
2026-06-18 RPA4553 - Jun 18, 21:15 UTCJun 18, 22:35 UTC1h 20m
2026-06-18 RPA4553 ACK → DCA Jun 18, 21:09 UTCJun 18, 22:33 UTC1h 24m
2026-06-18 RPA4553 - Jun 18, 18:35 UTCJun 18, 19:35 UTC1h 0m
2026-06-18 RPA4441 IND → ORD Jun 18, 15:35 UTCJun 18, 16:20 UTC45m
2026-06-18 RPA4441 IND → ORD Jun 18, 15:33 UTCJun 18, 16:19 UTC46m
2026-06-18 RPA4441 IND → ORD Jun 18, 13:45 UTCJun 18, 14:30 UTC45m
2026-06-18 RPA4679 - Jun 18, 10:20 UTCJun 18, 11:55 UTC1h 35m
2026-06-18 RPA4696 - Jun 18, 02:00 UTCJun 18, 04:30 UTC2h 30m
2026-06-17 RPA4437 MHT → DCA Jun 17, 22:15 UTCJun 18, 00:00 UTC1h 45m
2026-06-17 RPA4600 LGA → IND Jun 17, 18:45 UTCJun 17, 20:35 UTC1h 50m
2026-06-17 RPA4367 DCA → PVD Jun 17, 16:39 UTCJun 17, 17:23 UTC44m
2026-06-17 RPA4367 DCA → PVD Jun 17, 16:40 UTCJun 17, 17:30 UTC50m
2026-06-17 RPA4367 DCA → PVD Jun 17, 14:35 UTCJun 17, 15:20 UTC45m
2026-06-17 RPA4411 BOS → IND Jun 17, 11:25 UTCJun 17, 13:00 UTC1h 35m
2026-06-17 RPA4686 PHL → IAH Jun 17, 02:25 UTCJun 17, 04:00 UTC1h 35m
2026-06-16 RPA4402 IND → ORD Jun 16, 23:35 UTCJun 17, 00:30 UTC55m
2026-06-16 RPA4402 IND → ORD Jun 16, 21:30 UTCJun 16, 22:30 UTC1h 0m
2026-06-16 RPA4416 JFK → CMH Jun 16, 17:00 UTCJun 16, 19:10 UTC2h 10m
2026-06-16 RPA4416 JFK → CMH Jun 16, 13:15 UTCJun 16, 15:45 UTC2h 30m
2026-06-16 RPA4529 BDL → ORD Jun 16, 10:30 UTCJun 16, 11:15 UTC45m
2026-06-15 RPA4611 JFK → PIT Jun 15, 23:20 UTCJun 16, 00:31 UTC1h 11m
2026-06-15 RPA4611 - Jun 15, 23:25 UTCJun 16, 00:29 UTC1h 5m
2026-06-15 RPA4545 - Jun 15, 18:10 UTCJun 15, 20:04 UTC1h 55m
2026-06-15 RPA4344 - Jun 15, 14:10 UTCJun 15, 15:15 UTC1h 5m
2026-06-15 RPA4344 RDU → BNA Jun 15, 14:06 UTCJun 15, 15:26 UTC1h 20m
2026-06-15 RPA4531 SDF → DCA Jun 15, 12:05 UTCJun 15, 13:00 UTC55m
2026-06-15 RPA4539 - Jun 15, 02:24 UTCJun 15, 03:24 UTC1h 0m
2026-06-15 RPA4539 ORD → PIT Jun 15, 02:23 UTCJun 15, 03:24 UTC1h 1m
2026-06-14 RPA4426 RIC → PHL Jun 14, 22:35 UTCJun 15, 00:40 UTC2h 4m

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 N114HQ page for operator, model, and routing details .

Mode-S A03BCD frequently asked

What is Mode-S code A03BCD?
A03BCD is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N114HQ.
Where is Mode-S A03BCD registered?
Mode-S code A03BCD 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 A03BCD broadcasting right now?
No active broadcast right now. Last signal was 11h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A03BCD, octal 50035715, decimal 10,501,069.
What flights does A03BCD operate?
Mode-S A03BCD has broadcast 20 distinct callsigns, including RPA4428, RPA4367, RPA4620, RPA4575, RPA4553.