Apparatus

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sensors Mode-S transponder

A9EEB6

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N739YX · EMBRAER ERJ-170-200 (long wing) · operated by REPUBLIC AIRWAYS INC

Hex
A9EEB6
Octal
52367266
Decimal
11,136,694
Country
US
Tail
N739YX
Type
E75L
No current signal · last broadcast Jul 26, 21:10 UTC
Flights observed
679
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:10 UTC

Last known position

Most recent position reported by Mode-S A9EEB6.

Country allocation

The ICAO 24-bit address A9EEB6 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
RPA3635 Republic Airlines 9 2026-07-23
RPA3603 Republic Airlines 9 2026-06-10
RPA3647 - 8 2026-07-11
RPA3673 - 7 2026-07-10
RPA3634 - 7 2026-07-24
RPA3574 - 7 2026-07-03
RPA3494 - 7 2026-07-11
RPA3423 Republic Airlines 7 2026-07-25
RPA3718 Republic Airlines 6 2026-07-23
RPA3706 - 6 2026-07-10
RPA3697 - 6 2026-07-23
RPA3672 Republic Airlines 6 2026-07-21
RPA3596 - 6 2026-07-12
RPA3594 Republic Airlines 6 2026-07-25
RPA3568 - 6 2026-07-10
RPA3563 - 6 2026-07-03
RPA3484 Republic Airlines 6 2026-06-11
RPA3483 - 6 2026-07-09
RPA3464 Republic Airlines 6 2026-06-03
RPA3443 - 6 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RPA3611 MSY → ORD Jul 26, 19:50 UTCJul 26, 21:00 UTC1h 10m
2026-07-26 RPA3495 EWR → YYZ Jul 26, 17:25 UTCJul 26, 18:30 UTC1h 5m
2026-07-26 RPA3465 DCA → EWR Jul 26, 14:00 UTCJul 26, 15:30 UTC1h 30m
2026-07-26 RPA3465 DCA → EWR Jul 26, 14:09 UTCJul 26, 15:30 UTC1h 21m
2026-07-26 RPA3665 ROC → EWR Jul 26, 12:00 UTCJul 26, 12:45 UTC45m
2026-07-26 RPA3559 BNA → EWR Jul 26, 01:10 UTCJul 26, 03:00 UTC1h 50m
2026-07-25 RPA3505 EWR → BGR Jul 25, 20:00 UTCJul 25, 21:55 UTC1h 55m
2026-07-25 RPA3505 EWR → BGR Jul 25, 19:54 UTCJul 25, 21:52 UTC1h 58m
2026-07-25 RPA3701 GSP → EWR Jul 25, 16:11 UTCJul 25, 17:19 UTC1h 8m
2026-07-25 RPA3701 GSP → EWR Jul 25, 16:00 UTCJul 25, 17:20 UTC1h 20m
2026-07-25 RPA3423 CMH → EWR Jul 25, 14:00 UTCJul 25, 14:52 UTC52m
2026-07-25 RPA3423 CMH → EWR Jul 25, 14:00 UTCJul 25, 15:00 UTC1h 0m
2026-07-25 RPA3594 IAD → EWR Jul 25, 10:35 UTCJul 25, 12:15 UTC1h 40m
2026-07-25 RPA3594 IAD → EWR Jul 25, 10:47 UTCJul 25, 12:11 UTC1h 24m
2026-07-24 RPA3598 RDU → EWR Jul 24, 23:10 UTCJul 24, 23:55 UTC45m
2026-07-24 RPA3440 BUF → EWR Jul 24, 20:40 UTCJul 24, 21:55 UTC1h 15m
2026-07-24 RPA3634 - Jul 24, 18:35 UTCJul 24, 19:35 UTC1h 0m
2026-07-24 RPA3634 ORD → BNA Jul 24, 18:23 UTCJul 24, 19:34 UTC1h 11m
2026-07-24 RPA3507 EWR → DTW Jul 24, 15:40 UTCJul 24, 17:00 UTC1h 20m
2026-07-24 RPA3425 - Jul 24, 12:35 UTCJul 24, 13:50 UTC1h 15m
2026-07-23 RPA3635 IAD → LGA Jul 23, 22:05 UTCJul 23, 23:45 UTC1h 40m
2026-07-23 RPA3610 CHS → EWR Jul 23, 19:15 UTCJul 23, 20:05 UTC50m
2026-07-23 RPA3609 MKE → EWR Jul 23, 16:20 UTCJul 23, 18:05 UTC1h 45m
2026-07-23 RPA3697 EWR → MKE Jul 23, 13:20 UTCJul 23, 15:10 UTC1h 50m
2026-07-23 RPA3718 EWR → MSP Jul 23, 10:15 UTCJul 23, 11:35 UTC1h 20m
2026-07-22 RPA3580 SDF → EWR Jul 22, 23:50 UTCJul 23, 01:25 UTC1h 35m
2026-07-22 RPA3580 SDF → EWR Jul 22, 23:58 UTCJul 23, 01:26 UTC1h 28m
2026-07-22 RPA3620 ORF → EWR Jul 22, 19:40 UTCJul 22, 20:40 UTC1h 0m
2026-07-22 RPA3535 EWR → JAX Jul 22, 17:25 UTCJul 22, 18:40 UTC1h 15m
2026-07-21 RPA3500 EWR → MKE Jul 21, 17:05 UTCJul 21, 18:25 UTC1h 20m
2026-07-21 RPA3672 RDU → EWR Jul 21, 15:20 UTCJul 21, 16:05 UTC45m
2026-07-21 RPA3672 RDU → EWR Jul 21, 12:45 UTCJul 21, 14:30 UTC1h 45m
2026-07-20 RPA3460 YYZ → EWR Jul 20, 23:20 UTCJul 21, 00:20 UTC59m
2026-07-20 RPA3531 - Jul 20, 20:30 UTCJul 20, 21:35 UTC1h 5m
2026-07-20 RPA3605 YYZ → ORD Jul 20, 17:25 UTCJul 20, 18:40 UTC1h 15m
2026-07-20 RPA3555 SAV → EWR Jul 20, 14:20 UTCJul 20, 15:25 UTC1h 5m
2026-07-20 RPA3567 - Jul 20, 11:20 UTCJul 20, 12:55 UTC1h 35m
2026-07-20 RPA3707 ORD → IND Jul 20, 02:40 UTCJul 20, 03:15 UTC35m
2026-07-19 RPA3635 IAD → LGA Jul 19, 23:05 UTCJul 20, 00:45 UTC1h 40m
2026-07-19 RPA3610 - Jul 19, 20:55 UTCJul 19, 22:10 UTC1h 15m
2026-07-19 RPA3609 - Jul 19, 17:35 UTCJul 19, 19:35 UTC2h 0m
2026-07-19 RPA3697 YOW → EWR Jul 19, 15:54 UTCJul 19, 16:41 UTC47m
2026-07-19 RPA3697 - Jul 19, 13:50 UTCJul 19, 15:35 UTC1h 45m
2026-07-19 RPA3530 - Jul 19, 10:05 UTCJul 19, 11:50 UTC1h 45m
2026-07-18 RPA3480 - Jul 18, 14:50 UTCJul 18, 16:40 UTC1h 50m
2026-07-18 RPA3697 - Jul 18, 10:20 UTCJul 18, 11:20 UTC1h 0m
2026-07-18 RPA3506 - Jul 18, 01:25 UTCJul 18, 02:25 UTC1h 0m
2026-07-17 RPA3633 - Jul 17, 22:40 UTCJul 17, 23:50 UTC1h 10m
2026-07-17 RPA3422 - Jul 17, 14:44 UTCJul 17, 15:35 UTC50m
2026-07-17 RPA3429 - Jul 17, 11:35 UTCJul 17, 12:35 UTC1h 0m

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 N739YX page for operator, model, and routing details .

Mode-S A9EEB6 frequently asked

What is Mode-S code A9EEB6?
A9EEB6 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N739YX.
Where is Mode-S A9EEB6 registered?
Mode-S code A9EEB6 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 A9EEB6 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9EEB6, octal 52367266, decimal 11,136,694.
What flights does A9EEB6 operate?
Mode-S A9EEB6 has broadcast 20 distinct callsigns, including RPA3635, RPA3603, RPA3647, RPA3673, RPA3634.