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sensors Mode-S transponder

AA9679

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N781YX · operated by REPUBLIC AIRWAYS INC

Hex
AA9679
Octal
52513171
Decimal
11,179,641
Country
US
Tail
N781YX
Type
E75L
No current signal · last broadcast Jul 26, 22:15 UTC
Flights observed
637
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S AA9679.

Country allocation

The ICAO 24-bit address AA9679 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
RPA3584 Republic Airlines 9 2026-07-26
RPA3513 - 9 2026-07-01
RPA3561 Republic Airlines 8 2026-07-25
RPA3471 - 8 2026-07-01
RPA3707 Republic Airlines 7 2026-07-26
RPA3484 - 7 2026-07-21
RPA3456 Republic Airlines 7 2026-07-20
RPA3643 Republic Airlines 6 2026-05-16
RPA3618 Republic Airlines 6 2026-05-22
RPA3470 - 6 2026-07-08
RPA3717 - 5 2026-07-18
RPA3703 - 5 2026-07-09
RPA3698 - 5 2026-06-23
RPA3686 - 5 2026-07-13
RPA3685 - 5 2026-07-14
RPA3671 - 5 2026-07-07
RPA3650 - 5 2026-06-30
RPA3632 - 5 2026-07-22
RPA3616 - 5 2026-07-09
RPA3613 - 5 2026-06-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RPA3584 DTW → EWR Jul 26, 21:35 UTCJul 26, 22:15 UTC40m
2026-07-26 RPA3415 AVL → EWR Jul 26, 19:15 UTCJul 26, 20:15 UTC1h 0m
2026-07-26 RPA3704 EWR → DCA Jul 26, 16:00 UTCJul 26, 17:35 UTC1h 35m
2026-07-26 RPA3539 GSP → EWR Jul 26, 12:15 UTCJul 26, 12:55 UTC40m
2026-07-26 RPA3539 GSP → EWR Jul 26, 12:16 UTCJul 26, 12:45 UTC29m
2026-07-26 RPA3707 RDU → EWR Jul 26, 01:10 UTCJul 26, 01:40 UTC30m
2026-07-25 RPA3635 IAD → LGA Jul 25, 21:35 UTCJul 25, 23:20 UTC1h 45m
2026-07-25 RPA3610 CHS → EWR Jul 25, 19:40 UTCJul 25, 20:30 UTC50m
2026-07-25 RPA3645 PHL → EWR Jul 25, 15:10 UTCJul 25, 16:45 UTC1h 35m
2026-07-25 RPA3645 PHL → EWR Jul 25, 15:09 UTCJul 25, 16:42 UTC1h 33m
2026-07-25 RPA3561 ORD → MSY Jul 25, 12:45 UTCJul 25, 14:02 UTC1h 17m
2026-07-25 RPA3561 ORD → MSY Jul 25, 12:50 UTCJul 25, 14:00 UTC1h 10m
2026-07-25 RPA3710 ORF → EWR Jul 25, 10:15 UTCJul 25, 11:10 UTC55m
2026-07-24 RPA3302 MSN → JAX Jul 24, 18:35 UTCJul 24, 19:55 UTC1h 20m
2026-07-24 RPA3682 IND → EWR Jul 24, 02:15 UTCJul 24, 03:00 UTC45m
2026-07-23 RPA3678 GSO → EWR Jul 23, 22:25 UTCJul 24, 00:15 UTC1h 50m
2026-07-23 RPA3576 EWR → DTW Jul 23, 18:15 UTCJul 23, 20:55 UTC2h 40m
2026-07-23 RPA3500 EWR → MKE Jul 23, 14:20 UTCJul 23, 15:25 UTC1h 5m
2026-07-23 RPA3500 EWR → MKE Jul 23, 14:29 UTCJul 23, 15:28 UTC59m
2026-07-23 RPA3672 RDU → EWR Jul 23, 11:40 UTCJul 23, 13:10 UTC1h 30m
2026-07-23 RPA3518 MSN → ORD Jul 23, 00:00 UTCJul 23, 01:30 UTC1h 30m
2026-07-23 RPA3518 MSN → ORD Jul 23, 00:02 UTCJul 23, 01:26 UTC1h 24m
2026-07-22 RPA3584 DTW → EWR Jul 22, 21:26 UTCJul 22, 22:57 UTC1h 31m
2026-07-22 RPA3584 DTW → EWR Jul 22, 21:25 UTCJul 22, 23:00 UTC1h 35m
2026-07-22 RPA3415 AVL → EWR Jul 22, 18:50 UTCJul 22, 19:40 UTC50m
2026-07-22 RPA3704 EWR → DCA Jul 22, 16:00 UTCJul 22, 17:25 UTC1h 25m
2026-07-22 RPA3632 - Jul 22, 14:15 UTCJul 22, 14:35 UTC20m
2026-07-22 RPA3632 SAV → ORD Jul 22, 12:20 UTCJul 22, 14:35 UTC2h 15m
2026-07-22 RPA3632 SAV → ORD Jul 22, 12:19 UTCJul 22, 13:58 UTC1h 39m
2026-07-21 RPA3496 YUL → IAD Jul 21, 23:45 UTCJul 22, 01:35 UTC1h 50m
2026-07-21 RPA3484 - Jul 21, 21:35 UTCJul 21, 21:40 UTC5m
2026-07-21 RPA3484 CMH → ORD Jul 21, 20:45 UTCJul 21, 21:40 UTC55m
2026-07-21 RPA3484 CMH → ORD Jul 21, 20:38 UTCJul 21, 21:16 UTC38m
2026-07-21 RPA3481 EWR → YYZ Jul 21, 00:20 UTCJul 21, 01:15 UTC55m
2026-07-21 RPA3481 EWR → YYZ Jul 21, 00:00 UTCJul 21, 00:15 UTC15m
2026-07-20 RPA3456 IAD → IND Jul 20, 21:05 UTCJul 20, 22:30 UTC1h 25m
2026-07-20 RPA3537 EWR → BUF Jul 20, 18:10 UTCJul 20, 19:40 UTC1h 30m
2026-07-20 RPA3715 - Jul 20, 15:50 UTCJul 20, 17:00 UTC1h 10m
2026-07-20 RPA781 TGU → MIA Jul 20, 03:20 UTCJul 20, 04:20 UTC1h 0m
2026-07-19 RPA3478 EWR → ILM Jul 19, 21:05 UTCJul 19, 22:35 UTC1h 30m
2026-07-19 RPA3550 EWR → CLT Jul 19, 19:05 UTCJul 19, 19:40 UTC35m
2026-07-19 RPA3422 - Jul 19, 11:35 UTCJul 19, 12:45 UTC1h 10m
2026-07-19 RPA3598 - Jul 19, 00:35 UTCJul 19, 01:25 UTC50m
2026-07-19 RPA3598 ORD → SDF Jul 19, 00:35 UTCJul 19, 01:24 UTC49m
2026-07-18 RPA3426 EYW → EWR Jul 18, 20:40 UTCJul 18, 23:15 UTC2h 35m
2026-07-18 RPA3487 - Jul 18, 17:15 UTCJul 18, 18:35 UTC1h 20m
2026-07-18 RPA3717 SDF → IAD Jul 18, 14:20 UTCJul 18, 15:30 UTC1h 10m
2026-07-17 RPA3538 - Jul 17, 21:50 UTCJul 17, 23:05 UTC1h 15m
2026-07-17 RPA3538 IAD → SDF Jul 17, 21:48 UTCJul 17, 23:02 UTC1h 14m
2026-07-17 RPA3401 BNA → EWR Jul 17, 19:05 UTCJul 17, 20:10 UTC1h 5m

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 N781YX page for operator, model, and routing details .

Mode-S AA9679 frequently asked

What is Mode-S code AA9679?
AA9679 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N781YX.
Where is Mode-S AA9679 registered?
Mode-S code AA9679 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 AA9679 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA9679, octal 52513171, decimal 11,179,641.
What flights does AA9679 operate?
Mode-S AA9679 has broadcast 20 distinct callsigns, including RPA3584, RPA3513, RPA3561, RPA3471, RPA3707.