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sensors Mode-S transponder

A4F414

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N418YX · EMBRAER ERJ-170-200 (long wing) · operated by REPUBLIC AIRWAYS INC

Hex
A4F414
Octal
51172024
Decimal
10,810,388
Country
US
Tail
N418YX
Type
E75L
No current signal · last broadcast 1h ago
Flights observed
646
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A4F414.

Country allocation

The ICAO 24-bit address A4F414 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
RPA4421 Republic Airlines 11 2026-06-14
RPA4352 Republic Airlines 9 2026-05-30
RPA4704 Republic Airlines 8 2026-06-22
RPA4516 - 8 2026-07-02
RPA4754 - 7 2026-07-07
RPA4640 - 7 2026-07-10
RPA4553 - 7 2026-07-13
RPA4426 - 7 2026-07-10
RPA4756 - 6 2026-07-11
RPA4738 Republic Airlines 6 2026-06-11
RPA4711 Republic Airlines 6 2026-06-03
RPA4647 Republic Airlines 6 2026-06-13
RPA4625 - 6 2026-07-09
RPA4570 - 6 2026-07-01
RPA4545 - 6 2026-06-25
RPA4440 Republic Airlines 6 2026-06-02
RPA4425 - 6 2026-07-09
RPA4713 Republic Airlines 5 2026-05-14
RPA4691 Republic Airlines 5 2026-06-12
RPA4687 - 5 2026-07-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 RPA4694 - Jul 14, 01:35 UTCJul 14, 03:35 UTC2h 0m
2026-07-13 RPA4553 ACK → DCA Jul 13, 23:20 UTCJul 14, 00:35 UTC1h 15m
2026-07-13 RPA4553 DCA → ACK Jul 13, 21:25 UTCJul 13, 22:30 UTC1h 5m
2026-07-13 RPA4753 - Jul 13, 19:00 UTCJul 13, 20:15 UTC1h 15m
2026-07-13 RPA4753 SDF → DCA Jul 13, 18:57 UTCJul 13, 20:10 UTC1h 13m
2026-07-13 RPA4753 DCA → SDF Jul 13, 15:50 UTCJul 13, 17:00 UTC1h 10m
2026-07-13 RPA4671 JFK → DCA Jul 13, 13:55 UTCJul 13, 14:40 UTC45m
2026-07-13 RPA4657 - Jul 13, 10:05 UTCJul 13, 11:55 UTC1h 50m
2026-07-13 RPA4657 CVG → JFK Jul 13, 10:05 UTCJul 13, 11:46 UTC1h 41m
2026-07-13 RPA4776 - Jul 13, 05:05 UTCJul 13, 05:55 UTC50m
2026-07-13 RPA4776 ORD → CVG Jul 13, 05:05 UTCJul 13, 05:41 UTC36m
2026-07-13 RPA4492 - Jul 13, 02:10 UTCJul 13, 03:55 UTC1h 45m
2026-07-12 RPA4804 JFK → RDU Jul 12, 23:03 UTCJul 13, 00:15 UTC1h 12m
2026-07-12 RPA4804 JFK → RDU Jul 12, 23:05 UTCJul 13, 00:20 UTC1h 15m
2026-07-12 RPA4371 ORD → JFK Jul 12, 18:20 UTCJul 12, 20:01 UTC1h 40m
2026-07-12 RPA4371 ORD → JFK Jul 12, 18:16 UTCJul 12, 19:58 UTC1h 42m
2026-07-12 RPA4365 JFK → ORD Jul 12, 14:40 UTCJul 12, 16:39 UTC1h 59m
2026-07-12 RPA4365 - Jul 12, 14:40 UTCJul 12, 17:01 UTC2h 20m
2026-07-12 RPA4631 - Jul 12, 11:20 UTCJul 12, 13:01 UTC1h 40m
2026-07-12 RPA4631 IND → JFK Jul 12, 11:17 UTCJul 12, 12:54 UTC1h 37m
2026-07-12 RPA4363 - Jul 12, 03:50 UTCJul 12, 04:25 UTC35m
2026-07-12 RPA4363 ORD → IND Jul 12, 03:49 UTCJul 12, 04:23 UTC34m
2026-07-12 RPA4717 - Jul 12, 00:05 UTCJul 12, 01:45 UTC1h 40m
2026-07-11 RPA4717 - Jul 11, 21:30 UTCJul 11, 23:00 UTC1h 30m
2026-07-11 RPA4756 - Jul 11, 17:35 UTCJul 11, 19:15 UTC1h 40m
2026-07-11 RPA4756 ORD → RDU Jul 11, 14:55 UTCJul 11, 16:25 UTC1h 30m
2026-07-11 RPA4391 - Jul 11, 10:35 UTCJul 11, 12:45 UTC2h 10m
2026-07-11 RPA4403 - Jul 11, 02:35 UTCJul 11, 04:20 UTC1h 45m
2026-07-10 RPA4426 - Jul 10, 22:30 UTCJul 11, 01:20 UTC2h 50m
2026-07-10 RPA4426 IAH → ORD Jul 10, 22:29 UTCJul 11, 01:05 UTC2h 36m
2026-07-10 RPA4426 - Jul 10, 18:55 UTCJul 10, 21:10 UTC2h 15m
2026-07-10 RPA4746 - Jul 10, 16:00 UTCJul 10, 17:40 UTC1h 40m
2026-07-10 RPA4746 - Jul 10, 13:50 UTCJul 10, 15:10 UTC1h 20m
2026-07-10 RPA4651 - Jul 10, 10:10 UTCJul 10, 11:55 UTC1h 45m
2026-07-10 RPA4651 MDT → ORD Jul 10, 10:09 UTCJul 10, 11:50 UTC1h 41m
2026-07-10 RPA4640 - Jul 10, 03:50 UTCJul 10, 05:10 UTC1h 20m
2026-07-10 RPA4640 ORD → MDT Jul 10, 03:46 UTCJul 10, 05:09 UTC1h 23m
2026-07-09 RPA4465 - Jul 9, 23:10 UTCJul 10, 00:10 UTC1h 0m
2026-07-09 RPA4465 MSP → ORD Jul 9, 23:06 UTCJul 10, 00:05 UTC59m
2026-07-09 RPA4425 - Jul 9, 20:55 UTCJul 9, 21:55 UTC1h 0m
2026-07-09 RPA4425 ORD → MSP Jul 9, 20:50 UTCJul 9, 21:53 UTC1h 3m
2026-07-09 RPA4756 - Jul 9, 17:50 UTCJul 9, 19:35 UTC1h 45m
2026-07-09 RPA4756 - Jul 9, 14:50 UTCJul 9, 16:20 UTC1h 30m
2026-07-09 RPA4625 - Jul 9, 12:35 UTCJul 9, 13:35 UTC1h 0m
2026-07-09 RPA4611 - Jul 9, 01:20 UTCJul 9, 02:10 UTC50m
2026-07-08 RPA4390 - Jul 8, 22:45 UTCJul 8, 23:55 UTC1h 10m
2026-07-08 RPA4368 IND → BOS Jul 8, 18:50 UTCJul 8, 20:40 UTC1h 50m
2026-07-08 RPA4368 IND → BOS Jul 8, 18:50 UTCJul 8, 20:40 UTC1h 50m
2026-07-08 RPA4385 JFK → IND Jul 8, 16:05 UTCJul 8, 17:35 UTC1h 30m
2026-07-08 RPA4808 - Jul 8, 13:20 UTCJul 8, 14:45 UTC1h 25m

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 N418YX page for operator, model, and routing details .

Mode-S A4F414 frequently asked

What is Mode-S code A4F414?
A4F414 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N418YX.
Where is Mode-S A4F414 registered?
Mode-S code A4F414 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 A4F414 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4F414, octal 51172024, decimal 10,810,388.
What flights does A4F414 operate?
Mode-S A4F414 has broadcast 20 distinct callsigns, including RPA4421, RPA4352, RPA4704, RPA4516, RPA4754.