Apparatus

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sensors Mode-S transponder

A1D0A3

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N216JQ · EMBRAER ERJ-170-200 (long wing) · operated by REPUBLIC AIRWAYS INC

Hex
A1D0A3
Octal
50350243
Decimal
10,604,707
Country
US
Tail
N216JQ
Type
E75L
No current signal · last broadcast 1h ago
Flights observed
672
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A1D0A3.

Country allocation

The ICAO 24-bit address A1D0A3 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
RPA5764 Republic Airlines 11 2026-05-11
RPA5842 - 10 2026-07-12
RPA5765 - 9 2026-07-04
RPA5718 Republic Airlines 9 2026-06-04
RPA5633 Republic Airlines 9 2026-05-28
RPA5800 - 8 2026-06-18
RPA5687 - 8 2026-07-08
RPA5644 - 8 2026-07-12
RPA5846 Republic Airlines 7 2026-06-17
RPA5812 - 7 2026-06-25
RPA5810 - 7 2026-06-17
RPA5789 - 7 2026-06-30
RPA5777 Republic Airlines 7 2026-04-28
RPA5708 Republic Airlines 7 2026-04-28
RPA5702 - 7 2026-07-04
RPA5684 - 7 2026-07-13
RPA5678 - 7 2026-07-09
RPA5650 - 7 2026-07-13
RPA5641 - 7 2026-07-05
RPA5615 - 7 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 RPA5658 - Jul 14, 01:35 UTCJul 14, 02:45 UTC1h 10m
2026-07-13 RPA5650 - Jul 13, 22:20 UTCJul 13, 23:45 UTC1h 25m
2026-07-13 RPA5650 JFK → CMH Jul 13, 19:55 UTCJul 13, 21:10 UTC1h 15m
2026-07-13 RPA5859 - Jul 13, 17:25 UTCJul 13, 18:00 UTC35m
2026-07-13 RPA5859 JFK → MVY Jul 13, 15:25 UTCJul 13, 16:10 UTC45m
2026-07-13 RPA5720 BOS → JFK Jul 13, 13:35 UTCJul 13, 14:20 UTC45m
2026-07-13 RPA5684 - Jul 13, 10:15 UTCJul 13, 11:35 UTC1h 20m
2026-07-13 RPA5655 BOS → CLE Jul 13, 01:15 UTCJul 13, 02:40 UTC1h 25m
2026-07-12 RPA5644 - Jul 12, 23:05 UTCJul 13, 00:05 UTC1h 0m
2026-07-12 RPA5644 BOS → BWI Jul 12, 20:05 UTCJul 12, 21:05 UTC1h 0m
2026-07-12 RPA5842 - Jul 12, 16:25 UTCJul 12, 18:30 UTC2h 5m
2026-07-12 RPA5842 BNH → BNA Jul 12, 12:35 UTCJul 12, 14:55 UTC2h 20m
2026-07-12 RPA5710 DCA → BOS Jul 12, 10:15 UTCJul 12, 11:15 UTC1h 0m
2026-07-12 RPA5788 - Jul 12, 02:55 UTCJul 12, 04:01 UTC1h 5m
2026-07-11 RPA5855 - Jul 11, 23:05 UTCJul 11, 23:35 UTC30m
2026-07-11 RPA5762 DTW → CMH Jul 11, 20:40 UTCJul 11, 21:20 UTC40m
2026-07-11 RPA5762 DTW → CMH Jul 11, 20:40 UTCJul 11, 21:18 UTC38m
2026-07-11 RPA5774 - Jul 11, 18:20 UTCJul 11, 18:50 UTC30m
2026-07-11 RPA5774 - Jul 11, 16:35 UTCJul 11, 17:20 UTC45m
2026-07-11 RPA5607 - Jul 11, 14:45 UTCJul 11, 15:20 UTC35m
2026-07-11 RPA5606 DTW → PIT Jul 11, 12:45 UTCJul 11, 13:25 UTC40m
2026-07-11 RPA5839 JPN → DTW Jul 11, 10:10 UTCJul 11, 11:15 UTC1h 5m
2026-07-11 RPA5839 DCA → DTW Jul 11, 10:10 UTCJul 11, 11:15 UTC1h 5m
2026-07-11 RPA5704 BOS → DCA Jul 11, 03:30 UTCJul 11, 04:45 UTC1h 15m
2026-07-11 RPA5787 - Jul 11, 01:00 UTCJul 11, 02:20 UTC1h 20m
2026-07-11 RPA5787 PIT → BOS Jul 11, 00:58 UTCJul 11, 02:12 UTC1h 14m
2026-07-10 RPA5680 - Jul 10, 22:40 UTCJul 11, 00:05 UTC1h 25m
2026-07-10 RPA5615 - Jul 10, 17:00 UTCJul 10, 18:50 UTC1h 50m
2026-07-10 RPA5615 BOS → SDF Jul 10, 13:45 UTCJul 10, 15:45 UTC2h 0m
2026-07-10 RPA5698 DCA → BNH Jul 10, 11:10 UTCJul 10, 12:15 UTC1h 5m
2026-07-10 RPA5879 RIC → DCA Jul 10, 00:20 UTCJul 10, 00:45 UTC25m
2026-07-10 RPA5879 ORF → DCA Jul 10, 00:10 UTCJul 10, 00:45 UTC35m
2026-07-09 RPA5856 JFK → ORF Jul 9, 21:40 UTCJul 9, 22:30 UTC50m
2026-07-09 RPA5808 BOS → JFK Jul 9, 19:50 UTCJul 9, 20:35 UTC45m
2026-07-09 RPA5808 BOS → JFK Jul 9, 19:48 UTCJul 9, 20:31 UTC43m
2026-07-09 RPA5678 - Jul 9, 15:15 UTCJul 9, 16:25 UTC1h 10m
2026-07-09 RPA5678 - Jul 9, 12:35 UTCJul 9, 13:50 UTC1h 15m
2026-07-09 RPA5740 - Jul 9, 10:10 UTCJul 9, 11:05 UTC55m
2026-07-09 RPA5610 BOS → PHL Jul 9, 00:35 UTCJul 9, 01:35 UTC1h 0m
2026-07-09 RPA5610 BOS → PHL Jul 9, 00:34 UTCJul 9, 01:31 UTC57m
2026-07-08 RPA5738 LGA → BOS Jul 8, 22:09 UTCJul 8, 22:47 UTC38m
2026-07-08 RPA5738 LGA → BOS Jul 8, 22:10 UTCJul 8, 22:50 UTC40m
2026-07-08 RPA5715 - Jul 8, 19:50 UTCJul 8, 20:50 UTC1h 0m
2026-07-08 RPA5715 PIT → LGA Jul 8, 19:46 UTCJul 8, 20:46 UTC1h 0m
2026-07-08 RPA5715 - Jul 8, 17:25 UTCJul 8, 18:15 UTC50m
2026-07-08 RPA5755 BOS → LGA Jul 8, 15:15 UTCJul 8, 16:05 UTC50m
2026-07-08 RPA5755 BOS → LGA Jul 8, 15:14 UTCJul 8, 16:02 UTC48m
2026-07-08 RPA5687 DCA → BOS Jul 8, 12:50 UTCJul 8, 13:55 UTC1h 5m
2026-07-08 RPA5687 BOS → DCA Jul 8, 10:05 UTCJul 8, 11:20 UTC1h 15m
2026-07-08 RPA5850 - Jul 8, 04:15 UTCJul 8, 04:20 UTC5m

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 N216JQ page for operator, model, and routing details .

Mode-S A1D0A3 frequently asked

What is Mode-S code A1D0A3?
A1D0A3 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N216JQ.
Where is Mode-S A1D0A3 registered?
Mode-S code A1D0A3 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 A1D0A3 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 A1D0A3, octal 50350243, decimal 10,604,707.
What flights does A1D0A3 operate?
Mode-S A1D0A3 has broadcast 20 distinct callsigns, including RPA5764, RPA5842, RPA5765, RPA5718, RPA5633.