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sensors Mode-S transponder

A50549

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N422YX · EMBRAER ERJ-170-200 (long wing) · operated by REPUBLIC AIRWAYS INC

Hex
A50549
Octal
51202511
Decimal
10,814,793
Country
US
Tail
N422YX
Type
E75L
No current signal · last broadcast 2h ago
Flights observed
688
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S A50549.

Country allocation

The ICAO 24-bit address A50549 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
RPA4375 - 13 2026-07-08
RPA4373 - 9 2026-06-23
RPA4645 Republic Airlines 7 2026-05-25
RPA4429 Republic Airlines 7 2026-06-06
RPA4785 Republic Airlines 6 2026-06-05
RPA4738 Republic Airlines 6 2026-04-20
RPA4704 Republic Airlines 6 2026-05-04
RPA4654 Republic Airlines 6 2026-06-08
RPA4652 - 6 2026-07-02
RPA4628 - 6 2026-07-08
RPA4549 - 6 2026-07-01
RPA4505 - 6 2026-06-26
RPA4496 Republic Airlines 6 2026-06-25
RPA4432 Republic Airlines 6 2026-06-21
RPA4421 Republic Airlines 6 2026-06-09
RPA4409 - 6 2026-06-22
RPA4807 - 5 2026-06-30
RPA4726 - 5 2026-06-19
RPA4724 - 5 2026-06-27
RPA4712 - 5 2026-07-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 RPA4466 PHL → SDF Jul 14, 00:45 UTCJul 14, 02:20 UTC1h 35m
2026-07-13 RPA4749 - Jul 13, 22:05 UTCJul 13, 22:55 UTC50m
2026-07-13 RPA4749 PHL → ORF Jul 13, 19:45 UTCJul 13, 20:30 UTC45m
2026-07-13 RPA4430 - Jul 13, 17:00 UTCJul 13, 17:55 UTC55m
2026-07-13 RPA4561 - Jul 13, 15:05 UTCJul 13, 16:00 UTC55m
2026-07-13 RPA4561 PHL → HYA Jul 13, 15:01 UTCJul 13, 15:38 UTC37m
2026-07-13 RPA4613 - Jul 13, 12:05 UTCJul 13, 13:35 UTC1h 30m
2026-07-13 RPA4613 IND → PHL Jul 13, 12:02 UTCJul 13, 13:30 UTC1h 28m
2026-07-13 RPA4363 - Jul 13, 03:45 UTCJul 13, 04:20 UTC35m
2026-07-13 RPA4363 ORD → IND Jul 13, 03:43 UTCJul 13, 04:18 UTC35m
2026-07-12 RPA4426 - Jul 12, 22:30 UTCJul 13, 00:40 UTC2h 10m
2026-07-12 RPA4426 - Jul 12, 18:50 UTCJul 12, 21:05 UTC2h 15m
2026-07-12 RPA4338 - Jul 12, 16:05 UTCJul 12, 17:40 UTC1h 35m
2026-07-12 RPA4338 - Jul 12, 13:30 UTCJul 12, 14:45 UTC1h 15m
2026-07-12 RPA4597 - Jul 12, 11:01 UTCJul 12, 11:40 UTC40m
2026-07-12 RPA4597 IND → ORD Jul 12, 10:56 UTCJul 12, 11:38 UTC42m
2026-07-11 RPA4637 - Jul 11, 23:00 UTCJul 12, 00:25 UTC1h 25m
2026-07-11 RPA4637 PHL → PHL Jul 11, 22:35 UTCJul 11, 22:50 UTC15m
2026-07-11 RPA4430 - Jul 11, 17:55 UTCJul 11, 19:10 UTC1h 15m
2026-07-11 RPA4467 - Jul 11, 16:00 UTCJul 11, 16:55 UTC55m
2026-07-11 RPA4467 DCA → HYA Jul 11, 15:58 UTCJul 11, 16:46 UTC48m
2026-07-11 RPA4612 LGA → DCA Jul 11, 14:25 UTCJul 11, 15:10 UTC45m
2026-07-11 RPA4677 - Jul 11, 11:55 UTCJul 11, 13:05 UTC1h 10m
2026-07-11 RPA4722 LGA → CLE Jul 11, 02:10 UTCJul 11, 03:35 UTC1h 25m
2026-07-10 RPA4702 DCA → LGA Jul 10, 23:10 UTCJul 10, 23:50 UTC40m
2026-07-10 RPA4380 BOS → DCA Jul 10, 20:10 UTCJul 10, 21:40 UTC1h 30m
2026-07-10 RPA4516 - Jul 10, 17:40 UTCJul 10, 19:10 UTC1h 30m
2026-07-10 RPA4516 - Jul 10, 14:45 UTCJul 10, 16:25 UTC1h 40m
2026-07-10 RPA4376 JFK → BOS Jul 10, 12:25 UTCJul 10, 13:10 UTC45m
2026-07-10 RPA4376 JFK → BOS Jul 10, 12:25 UTCJul 10, 13:09 UTC44m
2026-07-10 RPA4401 BOS → JFK Jul 10, 10:15 UTCJul 10, 11:00 UTC45m
2026-07-10 RPA4370 LGA → BOS Jul 10, 02:30 UTCJul 10, 03:15 UTC45m
2026-07-10 RPA4370 LGA → BOS Jul 10, 02:27 UTCJul 10, 03:10 UTC43m
2026-07-09 RPA4470 OKC → LGA Jul 9, 22:15 UTCJul 10, 01:05 UTC2h 50m
2026-07-09 RPA4470 LGA → OKC Jul 9, 17:50 UTCJul 9, 20:55 UTC3h 5m
2026-07-09 RPA4508 STL → LGA Jul 9, 14:25 UTCJul 9, 16:25 UTC2h 0m
2026-07-09 RPA4508 LGA → STL Jul 9, 11:25 UTCJul 9, 13:35 UTC2h 10m
2026-07-08 RPA4607 ATL → LGA Jul 8, 23:40 UTCJul 9, 01:50 UTC2h 10m
2026-07-08 RPA4607 - Jul 8, 20:50 UTCJul 8, 22:40 UTC1h 50m
2026-07-08 RPA4375 - Jul 8, 18:35 UTCJul 8, 19:20 UTC45m
2026-07-08 RPA4375 LGA → BOS Jul 8, 16:30 UTCJul 8, 17:05 UTC35m
2026-07-08 RPA4628 ATL → LGA Jul 8, 13:45 UTCJul 8, 15:30 UTC1h 45m
2026-07-08 RPA4628 LGA → ATL Jul 8, 10:30 UTCJul 8, 12:15 UTC1h 45m
2026-07-08 RPA4607 ATL → LGA Jul 8, 01:10 UTCJul 8, 03:20 UTC2h 10m
2026-07-07 RPA4607 LGA → ATL Jul 7, 22:05 UTCJul 8, 00:05 UTC2h 0m
2026-07-07 RPA4375 BOS → LGA Jul 7, 19:05 UTCJul 7, 19:55 UTC50m
2026-07-07 RPA4375 BOS → LGA Jul 7, 19:03 UTCJul 7, 19:54 UTC51m
2026-07-07 RPA4375 LGA → BOS Jul 7, 16:20 UTCJul 7, 17:20 UTC1h 0m
2026-07-07 RPA4491 DCA → LGA Jul 7, 14:37 UTCJul 7, 15:15 UTC38m
2026-07-07 RPA4491 DCA → LGA Jul 7, 14:40 UTCJul 7, 15:20 UTC40m

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 N422YX page for operator, model, and routing details .

Mode-S A50549 frequently asked

What is Mode-S code A50549?
A50549 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N422YX.
Where is Mode-S A50549 registered?
Mode-S code A50549 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 A50549 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A50549, octal 51202511, decimal 10,814,793.
What flights does A50549 operate?
Mode-S A50549 has broadcast 20 distinct callsigns, including RPA4375, RPA4373, RPA4645, RPA4429, RPA4785.