Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A5106E

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N425YX · EMBRAER ERJ-170-200 (long wing) · operated by REPUBLIC AIRWAYS INC

Hex
A5106E
Octal
51210156
Decimal
10,817,646
Country
US
Tail
N425YX
Type
E75L
No current signal · last broadcast 53m ago
Flights observed
704
Distinct callsigns
20
Country
US
Last broadcast
53m ago

Last known position

Most recent position reported by Mode-S A5106E.

Country allocation

The ICAO 24-bit address A5106E 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
RPA4426 Republic Airlines 13 2026-05-02
RPA4336 - 11 2026-06-25
RPA4749 - 10 2026-07-10
RPA4405 - 9 2026-06-24
RPA4378 - 9 2026-06-29
RPA4460 - 8 2026-06-15
RPA4709 - 7 2026-06-25
RPA4704 Republic Airlines 7 2026-07-06
RPA4516 - 7 2026-06-25
RPA4759 - 6 2026-07-06
RPA4691 - 6 2026-07-14
RPA4572 Republic Airlines 6 2026-06-20
RPA4561 - 6 2026-07-09
RPA4521 Republic Airlines 6 2026-06-02
RPA4494 - 6 2026-07-12
RPA4475 Republic Airlines 6 2026-05-02
RPA4445 Republic Airlines 6 2026-06-16
RPA4444 Republic Airlines 6 2026-06-10
RPA4434 Republic Airlines 6 2026-06-12
RPA4375 - 6 2026-06-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 RPA4632 BOS → LGA Jul 14, 22:25 UTCJul 14, 23:10 UTC44m
2026-07-14 RPA4760 - Jul 14, 19:10 UTCJul 14, 20:55 UTC1h 45m
2026-07-14 RPA4760 CVG → BOS Jul 14, 19:09 UTCJul 14, 20:52 UTC1h 43m
2026-07-14 RPA4760 BOS → CVG Jul 14, 16:05 UTCJul 14, 17:40 UTC1h 35m
2026-07-14 RPA4691 DCA → BOS Jul 14, 14:05 UTCJul 14, 15:15 UTC1h 10m
2026-07-14 RPA4691 DCA → BOS Jul 14, 14:01 UTCJul 14, 15:15 UTC1h 14m
2026-07-14 RPA4580 - Jul 14, 11:15 UTCJul 14, 12:35 UTC1h 20m
2026-07-14 RPA4511 - Jul 14, 03:00 UTCJul 14, 04:15 UTC1h 15m
2026-07-14 RPA4511 ORD → CHA Jul 14, 02:59 UTCJul 14, 04:09 UTC1h 10m
2026-07-13 RPA4465 MSP → ORD Jul 13, 23:51 UTCJul 14, 00:50 UTC59m
2026-07-13 RPA4465 MSP → ORD Jul 13, 23:50 UTCJul 14, 00:55 UTC1h 5m
2026-07-13 RPA4425 - Jul 13, 21:05 UTCJul 13, 22:00 UTC55m
2026-07-13 RPA4425 ORD → MSP Jul 13, 21:03 UTCJul 13, 22:00 UTC57m
2026-07-13 RPA4756 RDU → ORD Jul 13, 17:50 UTCJul 13, 19:30 UTC1h 40m
2026-07-13 RPA4756 RDU → ORD Jul 13, 17:50 UTCJul 13, 19:27 UTC1h 37m
2026-07-13 RPA4756 - Jul 13, 14:45 UTCJul 13, 16:20 UTC1h 35m
2026-07-13 RPA4688 - Jul 13, 11:05 UTCJul 13, 12:35 UTC1h 30m
2026-07-13 RPA4688 RIC → ORD Jul 13, 11:02 UTCJul 13, 12:34 UTC1h 32m
2026-07-13 RPA4345 - Jul 13, 01:45 UTCJul 13, 02:35 UTC50m
2026-07-12 RPA4524 XNA → LGA Jul 12, 21:45 UTCJul 13, 00:25 UTC2h 40m
2026-07-12 RPA4524 LGA → XNA Jul 12, 17:50 UTCJul 12, 20:25 UTC2h 35m
2026-07-12 RPA4486 - Jul 12, 15:15 UTCJul 12, 16:10 UTC55m
2026-07-12 RPA4486 PWM → LGA Jul 12, 15:08 UTCJul 12, 16:05 UTC57m
2026-07-12 RPA4486 - Jul 12, 13:01 UTCJul 12, 13:45 UTC45m
2026-07-12 RPA4494 - Jul 12, 10:40 UTCJul 12, 11:45 UTC1h 5m
2026-07-12 RPA4615 ORD → RDU Jul 12, 01:20 UTCJul 12, 02:45 UTC1h 25m
2026-07-12 RPA4615 ORD → RDU Jul 12, 01:15 UTCJul 12, 02:46 UTC1h 31m
2026-07-11 RPA4537 STL → ORD Jul 11, 22:35 UTCJul 11, 23:25 UTC50m
2026-07-11 RPA4537 - Jul 11, 20:40 UTCJul 11, 21:35 UTC55m
2026-07-11 RPA4409 - Jul 11, 18:15 UTCJul 11, 19:15 UTC1h 0m
2026-07-11 RPA4609 JFK → CVG Jul 11, 15:25 UTCJul 11, 17:05 UTC1h 40m
2026-07-11 RPA4587 - Jul 11, 13:05 UTCJul 11, 14:05 UTC1h 0m
2026-07-11 RPA4587 PIT → JFK Jul 11, 13:01 UTCJul 11, 14:04 UTC1h 3m
2026-07-10 RPA4796 DCA → PIT Jul 10, 19:19 UTCJul 10, 20:15 UTC56m
2026-07-10 RPA4796 - Jul 10, 19:20 UTCJul 10, 20:10 UTC50m
2026-07-10 RPA4809 - Jul 10, 16:10 UTCJul 10, 17:35 UTC1h 25m
2026-07-10 RPA4360 DCA → ORD Jul 10, 13:15 UTCJul 10, 15:00 UTC1h 45m
2026-07-10 RPA4549 - Jul 10, 10:15 UTCJul 10, 11:30 UTC1h 15m
2026-07-10 RPA4466 PHL → SDF Jul 10, 03:55 UTCJul 10, 05:20 UTC1h 25m
2026-07-10 RPA4466 PHL → SDF Jul 10, 03:52 UTCJul 10, 05:19 UTC1h 27m
2026-07-10 RPA4749 ORF → PHL Jul 10, 01:00 UTCJul 10, 01:55 UTC55m
2026-07-09 RPA4749 PHL → ORF Jul 9, 20:00 UTCJul 9, 20:45 UTC45m
2026-07-09 RPA4430 - Jul 9, 18:25 UTCJul 9, 18:40 UTC15m
2026-07-09 RPA4430 - Jul 9, 17:05 UTCJul 9, 18:40 UTC1h 35m
2026-07-09 RPA4430 HYA → PHL Jul 9, 17:04 UTCJul 9, 18:06 UTC1h 2m
2026-07-09 RPA4561 - Jul 9, 15:25 UTCJul 9, 16:10 UTC45m
2026-07-09 RPA4561 - Jul 9, 14:55 UTCJul 9, 15:05 UTC10m
2026-07-09 RPA4750 SDF → PHL Jul 9, 11:39 UTCJul 9, 13:09 UTC1h 30m
2026-07-08 RPA4672 - Jul 8, 23:55 UTCJul 9, 01:10 UTC1h 15m
2026-07-08 RPA4672 DCA → SDF Jul 8, 23:54 UTCJul 9, 01:10 UTC1h 16m

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 N425YX page for operator, model, and routing details .

Mode-S A5106E frequently asked

What is Mode-S code A5106E?
A5106E is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N425YX.
Where is Mode-S A5106E registered?
Mode-S code A5106E 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 A5106E broadcasting right now?
No active broadcast right now. Last signal was 53m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A5106E, octal 51210156, decimal 10,817,646.
What flights does A5106E operate?
Mode-S A5106E has broadcast 20 distinct callsigns, including RPA4426, RPA4336, RPA4749, RPA4405, RPA4378.