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sensors Mode-S transponder

A9CD47

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N730YX · EMBRAER ERJ-170-200 (long wing) · operated by REPUBLIC AIRWAYS INC

Hex
A9CD47
Octal
52346507
Decimal
11,128,135
Country
US
Tail
N730YX
Type
E75L
No current signal · last broadcast Jul 26, 19:25 UTC
Flights observed
686
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 19:25 UTC

Last known position

Most recent position reported by Mode-S A9CD47.

Country allocation

The ICAO 24-bit address A9CD47 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
RPA3639 Republic Airlines 9 2026-07-23
RPA3705 Republic Airlines 8 2026-07-25
RPA3676 - 7 2026-06-27
RPA3662 - 7 2026-07-01
RPA3451 - 7 2026-07-13
RPA3444 Republic Airlines 7 2026-06-10
RPA3443 - 7 2026-07-19
RPA3655 Republic Airlines 6 2026-06-02
RPA3624 - 6 2026-07-14
RPA3595 Republic Airlines 6 2026-07-23
RPA3585 - 6 2026-06-15
RPA3578 - 6 2026-07-16
RPA3537 Republic Airlines 6 2026-05-25
RPA3486 Republic Airlines 6 2026-07-20
RPA3464 - 6 2026-07-16
RPA3426 - 6 2026-06-18
RPA3409 - 6 2026-07-07
RPA3707 - 5 2026-06-17
RPA3694 - 5 2026-07-11
RPA3614 - 5 2026-07-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RPA3695 SAT → EWR Jul 26, 17:30 UTCJul 26, 19:20 UTC1h 50m
2026-07-26 RPA3649 EWR → MSY Jul 26, 12:55 UTCJul 26, 15:15 UTC2h 20m
2026-07-26 RPA3656 PHL → EWR Jul 26, 10:10 UTCJul 26, 10:55 UTC45m
2026-07-26 RPA3682 IND → EWR Jul 26, 02:23 UTCJul 26, 02:59 UTC36m
2026-07-26 RPA3682 IND → EWR Jul 26, 02:20 UTCJul 26, 03:05 UTC45m
2026-07-26 RPA3449 EWR → RDU Jul 26, 00:25 UTCJul 26, 01:10 UTC45m
2026-07-25 RPA3447 IAD → JAX Jul 25, 21:50 UTCJul 25, 22:40 UTC50m
2026-07-25 RPA3618 MKE → EWR Jul 25, 18:00 UTCJul 25, 19:50 UTC1h 50m
2026-07-25 RPA3588 EWR → PVD Jul 25, 14:58 UTCJul 25, 16:25 UTC1h 27m
2026-07-25 RPA3588 EWR → PVD Jul 25, 14:50 UTCJul 25, 16:15 UTC1h 25m
2026-07-25 RPA3567 EWR → DTW Jul 25, 11:30 UTCJul 25, 13:00 UTC1h 30m
2026-07-25 RPA3705 ORD → LGA Jul 25, 00:05 UTCJul 25, 01:40 UTC1h 35m
2026-07-24 RPA3501 YYZ → EWR Jul 24, 20:50 UTCJul 24, 22:15 UTC1h 25m
2026-07-24 RPA3501 YYZ → EWR Jul 24, 20:59 UTCJul 24, 22:16 UTC1h 17m
2026-07-24 RPA3419 EWR → BOS Jul 24, 18:05 UTCJul 24, 19:40 UTC1h 35m
2026-07-24 RPA3648 YYZ → EWR Jul 24, 15:25 UTCJul 24, 16:45 UTC1h 20m
2026-07-24 RPA3431 BUF → EWR Jul 24, 13:10 UTCJul 24, 14:05 UTC55m
2026-07-24 RPA3489 EWR → CLT Jul 24, 10:15 UTCJul 24, 11:15 UTC1h 0m
2026-07-24 RPA3489 EWR → CLT Jul 24, 10:22 UTCJul 24, 11:15 UTC53m
2026-07-24 RPA3472 EWR → CLT Jul 24, 00:00 UTCJul 24, 01:30 UTC1h 30m
2026-07-23 RPA3469 DTW → EWR Jul 23, 20:30 UTCJul 23, 22:00 UTC1h 30m
2026-07-23 RPA3702 DFW → ORD Jul 23, 18:05 UTCJul 23, 18:40 UTC35m
2026-07-23 RPA3595 SDF → EWR Jul 23, 15:10 UTCJul 23, 16:55 UTC1h 45m
2026-07-23 RPA3639 EWR → CMH Jul 23, 12:38 UTCJul 23, 13:57 UTC1h 19m
2026-07-23 RPA3639 EWR → CMH Jul 23, 13:00 UTCJul 23, 14:00 UTC1h 0m
2026-07-23 RPA3420 - Jul 23, 10:15 UTCJul 23, 11:10 UTC55m
2026-07-23 RPA3420 BUF → EWR Jul 23, 10:19 UTCJul 23, 11:06 UTC47m
2026-07-23 RPA3476 EYW → EWR Jul 23, 01:35 UTCJul 23, 02:30 UTC55m
2026-07-22 RPA3468 CVG → EWR Jul 22, 22:25 UTCJul 22, 23:55 UTC1h 30m
2026-07-22 RPA3533 - Jul 22, 19:35 UTCJul 22, 21:20 UTC1h 45m
2026-07-22 RPA3623 EWR → ITH Jul 22, 15:55 UTCJul 22, 17:30 UTC1h 35m
2026-07-22 RPA3297 RDU → ITH Jul 22, 00:40 UTCJul 22, 02:00 UTC1h 20m
2026-07-22 RPA3297 RDU → ITH Jul 22, 00:22 UTCJul 22, 01:53 UTC1h 31m
2026-07-21 RPA3576 EWR → DTW Jul 21, 19:40 UTCJul 21, 22:10 UTC2h 30m
2026-07-21 RPA3709 IND → EWR Jul 21, 14:25 UTCJul 21, 15:45 UTC1h 20m
2026-07-21 RPA3550 EWR → CLT Jul 21, 12:45 UTCJul 21, 13:15 UTC30m
2026-07-21 RPA3479 - Jul 21, 10:05 UTCJul 21, 10:50 UTC45m
2026-07-21 RPA3479 IND → ORD Jul 21, 10:20 UTCJul 21, 10:38 UTC18m
2026-07-21 RPA3660 RDU → EWR Jul 21, 03:00 UTCJul 21, 03:35 UTC35m
2026-07-20 RPA3659 GSO → EWR Jul 20, 23:15 UTCJul 21, 00:55 UTC1h 39m
2026-07-20 RPA3452 - Jul 20, 20:55 UTCJul 20, 22:00 UTC1h 5m
2026-07-20 RPA3557 - Jul 20, 16:35 UTCJul 20, 18:00 UTC1h 25m
2026-07-20 RPA3486 EWR → DCA Jul 20, 13:45 UTCJul 20, 15:20 UTC1h 35m
2026-07-20 RPA3571 EWR → DTW Jul 20, 02:40 UTCJul 20, 04:10 UTC1h 30m
2026-07-20 RPA3571 EWR → DTW Jul 20, 02:48 UTCJul 20, 04:06 UTC1h 18m
2026-07-19 RPA3443 EWR → IND Jul 19, 21:55 UTCJul 19, 23:35 UTC1h 40m
2026-07-19 RPA3684 - Jul 19, 17:15 UTCJul 19, 19:20 UTC2h 5m
2026-07-19 RPA3684 GSP → EWR Jul 19, 17:12 UTCJul 19, 19:23 UTC2h 11m
2026-07-19 RPA3604 EWR → GSP Jul 19, 14:41 UTCJul 19, 16:07 UTC1h 26m
2026-07-19 RPA3604 - Jul 19, 14:40 UTCJul 19, 16:00 UTC1h 20m

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 N730YX page for operator, model, and routing details .

Mode-S A9CD47 frequently asked

What is Mode-S code A9CD47?
A9CD47 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N730YX.
Where is Mode-S A9CD47 registered?
Mode-S code A9CD47 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 A9CD47 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9CD47, octal 52346507, decimal 11,128,135.
What flights does A9CD47 operate?
Mode-S A9CD47 has broadcast 20 distinct callsigns, including RPA3639, RPA3705, RPA3676, RPA3662, RPA3451.