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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 2h ago
Flights observed
659
Distinct callsigns
20
Country
US
Last broadcast
2h ago

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 Republic Airlines 12 2026-06-01
RPA4738 - 11 2026-07-02
RPA4357 Republic Airlines 9 2026-05-02
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
RPA4764 Republic Airlines 6 2026-05-19
RPA4720 - 6 2026-07-09
RPA4717 - 6 2026-07-10
RPA4701 - 6 2026-07-13
RPA4630 Republic Airlines 6 2026-05-21
RPA4627 Republic Airlines 6 2026-06-13
RPA4362 - 6 2026-07-12
RPA4785 Republic Airlines 5 2026-05-01
RPA4759 - 5 2026-07-10
RPA4751 - 5 2026-06-16
RPA4748 - 5 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-18 RPA4662 - Jul 18, 02:25 UTCJul 18, 03:30 UTC1h 6m
2026-07-17 RPA4726 - Jul 17, 23:20 UTCJul 18, 01:30 UTC2h 10m
2026-07-17 RPA4726 IND → BOS Jul 17, 23:17 UTCJul 18, 01:27 UTC2h 10m
2026-07-17 RPA4449 JFK → IND Jul 17, 21:00 UTCJul 17, 22:35 UTC1h 35m
2026-07-17 RPA4476 - Jul 17, 14:55 UTCJul 17, 15:55 UTC1h 0m
2026-07-17 RPA4387 LGA → CLE Jul 17, 12:45 UTCJul 17, 13:55 UTC1h 10m
2026-07-17 RPA4693 - Jul 17, 10:10 UTCJul 17, 11:04 UTC55m
2026-07-17 RPA4510 ORD → ORF Jul 17, 01:00 UTCJul 17, 02:39 UTC1h 40m
2026-07-16 RPA4534 - Jul 16, 20:39 UTCJul 16, 22:49 UTC2h 10m
2026-07-16 RPA4534 - Jul 16, 18:05 UTCJul 16, 19:55 UTC1h 50m
2026-07-16 RPA4365 JFK → ORD Jul 16, 14:31 UTCJul 16, 16:36 UTC2h 5m
2026-07-16 RPA4365 - Jul 16, 14:35 UTCJul 16, 16:44 UTC2h 10m
2026-07-16 RPA4631 IND → JFK Jul 16, 11:20 UTCJul 16, 13:05 UTC1h 45m
2026-07-16 RPA4631 IND → JFK Jul 16, 11:19 UTCJul 16, 13:04 UTC1h 45m
2026-07-15 RPA4637 PHL → IND Jul 15, 23:00 UTCJul 16, 00:25 UTC1h 25m
2026-07-15 RPA4637 PHL → IND Jul 15, 23:00 UTCJul 16, 00:23 UTC1h 23m
2026-07-15 RPA4637 - Jul 15, 22:30 UTCJul 15, 22:40 UTC10m
2026-07-15 RPA4545 - Jul 15, 20:20 UTCJul 15, 21:30 UTC1h 10m
2026-07-15 RPA4545 - Jul 15, 17:40 UTCJul 15, 18:30 UTC50m
2026-07-15 RPA4602 - Jul 15, 15:10 UTCJul 15, 16:05 UTC55m
2026-07-15 RPA4602 MVY → PHL Jul 15, 15:07 UTCJul 15, 16:03 UTC56m
2026-07-15 RPA4649 DCA → MVY Jul 15, 13:05 UTCJul 15, 14:05 UTC1h 0m
2026-07-15 RPA4649 DCA → MVY Jul 15, 13:00 UTCJul 15, 14:05 UTC1h 5m
2026-07-15 RPA4549 - Jul 15, 10:10 UTCJul 15, 11:25 UTC1h 15m
2026-07-15 RPA4466 PHL → SDF Jul 15, 00:45 UTCJul 15, 02:00 UTC1h 15m
2026-07-14 RPA4749 ORF → PHL Jul 14, 22:07 UTCJul 14, 22:55 UTC48m
2026-07-14 RPA4749 ORF → PHL Jul 14, 22:10 UTCJul 14, 23:00 UTC49m
2026-07-14 RPA4749 PHL → ORF Jul 14, 19:45 UTCJul 14, 20:25 UTC40m
2026-07-14 RPA4430 - Jul 14, 16:55 UTCJul 14, 17:45 UTC50m
2026-07-14 RPA4561 - Jul 14, 15:05 UTCJul 14, 16:00 UTC55m
2026-07-14 RPA4561 PHL → HYA Jul 14, 15:04 UTCJul 14, 15:44 UTC40m
2026-07-14 RPA4613 - Jul 14, 12:05 UTCJul 14, 13:40 UTC1h 35m
2026-07-14 RPA4446 - Jul 14, 00:40 UTCJul 14, 02:10 UTC1h 30m
2026-07-13 RPA4359 ORF → JFK Jul 13, 21:45 UTCJul 13, 22:35 UTC50m
2026-07-13 RPA4359 ORF → JFK Jul 13, 21:44 UTCJul 13, 22:34 UTC50m
2026-07-13 RPA4359 JFK → ORF Jul 13, 19:45 UTCJul 13, 20:40 UTC55m
2026-07-13 RPA4592 IND → JFK Jul 13, 16:40 UTCJul 13, 18:25 UTC1h 45m
2026-07-13 RPA4701 - Jul 13, 13:50 UTCJul 13, 15:00 UTC1h 10m
2026-07-13 RPA4701 DCA → IND Jul 13, 13:47 UTCJul 13, 15:00 UTC1h 13m
2026-07-13 RPA4505 BOS → DCA Jul 13, 11:10 UTCJul 13, 12:20 UTC1h 10m
2026-07-13 RPA4505 BOS → DCA Jul 13, 11:06 UTCJul 13, 12:20 UTC1h 14m
2026-07-13 RPA4382 DCA → BOS Jul 13, 02:10 UTCJul 13, 03:20 UTC1h 10m
2026-07-12 RPA4495 - Jul 12, 22:30 UTCJul 12, 23:50 UTC1h 20m
2026-07-12 RPA4710 - Jul 12, 19:40 UTCJul 12, 21:35 UTC1h 55m
2026-07-12 RPA4765 - Jul 12, 17:15 UTCJul 12, 18:20 UTC1h 5m
2026-07-12 RPA4765 RDU → JFK Jul 12, 17:15 UTCJul 12, 18:19 UTC1h 4m
2026-07-12 RPA4354 - Jul 12, 13:30 UTCJul 12, 15:05 UTC1h 35m
2026-07-12 RPA4362 - Jul 12, 12:20 UTCJul 12, 12:25 UTC5m
2026-07-12 RPA4362 - Jul 12, 11:40 UTCJul 12, 12:25 UTC45m
2026-07-12 RPA4362 IND → ORD Jul 12, 11:37 UTCJul 12, 12:02 UTC25m

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 2h ago.
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, RPA4697, RPA4425.