Apparatus

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sensors Mode-S transponder

A5255A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N430YX · EMBRAER ERJ-170-200 (long wing) · operated by REPUBLIC AIRWAYS INC

Hex
A5255A
Octal
51222532
Decimal
10,823,002
Country
US
Tail
N430YX
Type
E75L
No current signal · last broadcast Jul 26, 22:30 UTC
Flights observed
719
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:30 UTC

Last known position

Most recent position reported by Mode-S A5255A.

Country allocation

The ICAO 24-bit address A5255A 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
RPA4704 - 15 2026-07-22
RPA4738 Republic Airlines 13 2026-07-26
RPA4357 Republic Airlines 9 2026-05-02
RPA4720 Republic Airlines 8 2026-07-24
RPA4717 Republic Airlines 8 2026-07-25
RPA4697 Republic Airlines 8 2026-05-31
RPA4425 - 8 2026-06-27
RPA4599 Republic Airlines 7 2026-04-30
RPA4423 Republic Airlines 7 2026-05-13
RPA4409 - 7 2026-06-20
RPA4373 Republic Airlines 7 2026-04-30
RPA4362 Republic Airlines 7 2026-07-24
RPA4764 Republic Airlines 6 2026-05-19
RPA4708 - 6 2026-07-21
RPA4701 - 6 2026-07-13
RPA4630 Republic Airlines 6 2026-05-21
RPA4627 Republic Airlines 6 2026-06-13
RPA4561 Republic Airlines 6 2026-07-25
RPA4516 - 6 2026-07-20
RPA4413 Republic Airlines 6 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RPA4585 BOS → IND Jul 26, 21:05 UTCJul 26, 22:30 UTC1h 25m
2026-07-26 RPA4738 DCA → MCI Jul 26, 18:35 UTCJul 26, 20:05 UTC1h 30m
2026-07-26 RPA4738 DCA → MCI Jul 26, 15:50 UTCJul 26, 17:20 UTC1h 30m
2026-07-26 RPA4687 JFK → DCA Jul 26, 12:30 UTCJul 26, 14:30 UTC2h 0m
2026-07-26 RPA4687 JFK → DCA Jul 26, 12:26 UTCJul 26, 14:27 UTC2h 1m
2026-07-25 RPA4692 BNA → PHL Jul 25, 22:35 UTCJul 26, 00:55 UTC2h 20m
2026-07-25 RPA4803 LGA → CVG Jul 25, 20:05 UTCJul 25, 21:10 UTC1h 5m
2026-07-25 RPA4557 DCA → BDL Jul 25, 17:20 UTCJul 25, 18:30 UTC1h 10m
2026-07-25 RPA4557 DCA → BDL Jul 25, 17:16 UTCJul 25, 18:25 UTC1h 9m
2026-07-25 RPA4561 CMH → LGA Jul 25, 15:30 UTCJul 25, 16:15 UTC45m
2026-07-25 RPA4463 DTW → LGA Jul 25, 11:25 UTCJul 25, 13:40 UTC2h 15m
2026-07-25 RPA4442 BOS → DCA Jul 25, 03:45 UTCJul 25, 04:35 UTC50m
2026-07-25 RPA4717 ILM → LGA Jul 25, 00:25 UTCJul 25, 01:55 UTC1h 30m
2026-07-24 RPA4717 ILM → LGA Jul 24, 21:55 UTCJul 24, 23:20 UTC1h 25m
2026-07-24 RPA4720 MCI → LGA Jul 24, 19:20 UTCJul 24, 20:05 UTC45m
2026-07-24 RPA4720 MCI → LGA Jul 24, 17:35 UTCJul 24, 18:20 UTC45m
2026-07-24 RPA4413 DCA → PHL Jul 24, 14:15 UTCJul 24, 15:30 UTC1h 15m
2026-07-24 RPA4413 DCA → PHL Jul 24, 14:14 UTCJul 24, 15:30 UTC1h 16m
2026-07-24 RPA4413 DCA → PHL Jul 24, 12:05 UTCJul 24, 13:15 UTC1h 10m
2026-07-24 RPA4362 DCA → LGA Jul 24, 10:25 UTCJul 24, 11:05 UTC40m
2026-07-24 RPA4594 MCI → LGA Jul 24, 02:00 UTCJul 24, 02:35 UTC35m
2026-07-23 RPA4537 RIC → LGA Jul 23, 23:15 UTCJul 24, 00:10 UTC55m
2026-07-23 RPA4537 RIC → LGA Jul 23, 23:11 UTCJul 24, 00:05 UTC54m
2026-07-23 RPA4537 RIC → LGA Jul 23, 20:35 UTCJul 23, 21:20 UTC45m
2026-07-23 RPA4488 LGA → ORF Jul 23, 16:20 UTCJul 23, 18:30 UTC2h 10m
2026-07-23 RPA4488 LGA → ORF Jul 23, 13:30 UTCJul 23, 15:15 UTC1h 45m
2026-07-23 RPA4427 LGA → IND Jul 23, 10:35 UTCJul 23, 11:50 UTC1h 15m
2026-07-23 RPA4569 ORD → BDL Jul 23, 00:40 UTCJul 23, 01:35 UTC55m
2026-07-22 RPA4727 LGA → GSO Jul 22, 21:51 UTCJul 22, 22:47 UTC56m
2026-07-22 RPA4727 LGA → GSO Jul 22, 21:55 UTCJul 22, 23:15 UTC1h 20m
2026-07-22 RPA4727 LGA → GSO Jul 22, 19:55 UTCJul 22, 20:55 UTC1h 0m
2026-07-22 RPA4704 - Jul 22, 17:30 UTCJul 22, 18:30 UTC1h 0m
2026-07-22 RPA4704 - Jul 22, 14:45 UTCJul 22, 15:10 UTC25m
2026-07-22 RPA4704 - Jul 22, 12:45 UTCJul 22, 13:35 UTC50m
2026-07-21 RPA4386 DCA → DSM Jul 21, 19:35 UTCJul 21, 21:55 UTC2h 20m
2026-07-21 RPA4708 - Jul 21, 16:45 UTCJul 21, 17:10 UTC25m
2026-07-21 RPA4708 ACK → BOS Jul 21, 16:39 UTCJul 21, 17:05 UTC26m
2026-07-21 RPA4708 - Jul 21, 14:25 UTCJul 21, 14:50 UTC25m
2026-07-21 RPA4714 RDU → DCA Jul 21, 11:10 UTCJul 21, 12:10 UTC1h 0m
2026-07-21 RPA4715 ILM → LGA Jul 21, 01:25 UTCJul 21, 02:35 UTC1h 10m
2026-07-20 RPA4709 ROC → BOS Jul 20, 23:35 UTCJul 21, 00:30 UTC55m
2026-07-20 RPA4709 BOS → ROC Jul 20, 21:05 UTCJul 20, 22:05 UTC1h 0m
2026-07-20 RPA4516 - Jul 20, 17:30 UTCJul 20, 19:10 UTC1h 40m
2026-07-20 RPA4516 TVC → BOS Jul 20, 17:25 UTCJul 20, 19:08 UTC1h 43m
2026-07-20 RPA4516 - Jul 20, 14:35 UTCJul 20, 16:20 UTC1h 45m
2026-07-20 RPA4376 BTV → DCA Jul 20, 12:30 UTCJul 20, 13:15 UTC45m
2026-07-20 RPA4401 BOS → JFK Jul 20, 10:30 UTCJul 20, 11:10 UTC40m
2026-07-20 RPA4678 IND → PHL Jul 20, 01:00 UTCJul 20, 03:15 UTC2h 15m
2026-07-19 RPA4678 IND → PHL Jul 19, 21:30 UTCJul 20, 00:00 UTC2h 30m
2026-07-19 RPA4370 PHL → BNA Jul 19, 19:35 UTCJul 19, 20:10 UTC35m

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 N430YX page for operator, model, and routing details .

Mode-S A5255A frequently asked

What is Mode-S code A5255A?
A5255A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N430YX.
Where is Mode-S A5255A registered?
Mode-S code A5255A 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 A5255A broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A5255A, octal 51222532, decimal 10,823,002.
What flights does A5255A operate?
Mode-S A5255A has broadcast 20 distinct callsigns, including RPA4704, RPA4738, RPA4357, RPA4720, RPA4717.