Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A03816

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N113HQ · EMBRAER ERJ-170-200 (long wing) · operated by REPUBLIC AIRWAYS INC

Hex
A03816
Octal
50034026
Decimal
10,500,118
Country
US
Tail
N113HQ
Type
E75L
Broadcasting now · callsign RPA4634 · -200 ft
Flights observed
658
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Current position

A03816 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A03816 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
RPA4352 - 8 2026-07-13
RPA4745 - 7 2026-06-28
RPA4569 - 7 2026-07-11
RPA4534 - 7 2026-07-01
RPA4709 - 6 2026-07-05
RPA4708 - 6 2026-07-06
RPA4697 - 6 2026-07-08
RPA4595 Republic Airlines 6 2026-05-05
RPA4590 - 6 2026-07-09
RPA4460 Republic Airlines 6 2026-06-12
RPA4415 Republic Airlines 6 2026-05-05
RPA4367 - 6 2026-06-22
RPA4358 - 6 2026-07-11
RPA4787 Republic Airlines 5 2026-06-11
RPA4773 - 5 2026-06-18
RPA4769 Republic Airlines 5 2026-05-20
RPA4724 - 5 2026-07-03
RPA4676 - 5 2026-07-02
RPA4622 Republic Airlines 5 2026-05-31
RPA4555 - 5 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 RPA4456 - Jul 13, 21:15 UTCJul 13, 23:00 UTC1h 45m
2026-07-13 RPA4456 IND → JFK Jul 13, 21:15 UTCJul 13, 23:00 UTC1h 45m
2026-07-13 RPA4452 - Jul 13, 19:00 UTCJul 13, 20:15 UTC1h 15m
2026-07-13 RPA4405 - Jul 13, 16:20 UTCJul 13, 17:20 UTC1h 0m
2026-07-13 RPA4405 DCA → CMH Jul 13, 14:15 UTCJul 13, 15:05 UTC50m
2026-07-13 RPA4352 - Jul 13, 11:55 UTCJul 13, 13:15 UTC1h 20m
2026-07-12 RPA4520 - Jul 12, 23:50 UTCJul 13, 01:05 UTC1h 15m
2026-07-12 RPA4553 - Jul 12, 21:40 UTCJul 12, 22:45 UTC1h 5m
2026-07-12 RPA4553 ACK → DCA Jul 12, 21:35 UTCJul 12, 22:48 UTC1h 13m
2026-07-12 RPA4553 - Jul 12, 19:20 UTCJul 12, 20:20 UTC1h 0m
2026-07-12 RPA4757 - Jul 12, 17:50 UTCJul 12, 18:30 UTC40m
2026-07-12 RPA4757 PIT → DCA Jul 12, 17:46 UTCJul 12, 18:26 UTC40m
2026-07-12 RPA4484 - Jul 12, 15:15 UTCJul 12, 16:15 UTC1h 0m
2026-07-12 RPA4625 - Jul 12, 12:25 UTCJul 12, 13:35 UTC1h 10m
2026-07-11 RPA4569 - Jul 11, 23:40 UTCJul 12, 00:40 UTC1h 0m
2026-07-11 RPA4563 - Jul 11, 20:15 UTCJul 11, 21:55 UTC1h 40m
2026-07-11 RPA4563 RDU → ORD Jul 11, 20:12 UTCJul 11, 21:54 UTC1h 42m
2026-07-11 RPA4658 JFK → RDU Jul 11, 17:20 UTCJul 11, 18:35 UTC1h 15m
2026-07-11 RPA4712 - Jul 11, 13:55 UTCJul 11, 16:00 UTC2h 5m
2026-07-11 RPA4358 DCA → BNA Jul 11, 11:20 UTCJul 11, 12:55 UTC1h 35m
2026-07-11 RPA4358 DCA → BNA Jul 11, 11:19 UTCJul 11, 12:46 UTC1h 27m
2026-07-11 RPA4433 - Jul 11, 03:10 UTCJul 11, 03:20 UTC10m
2026-07-11 RPA4433 - Jul 11, 02:05 UTCJul 11, 03:20 UTC1h 15m
2026-07-11 RPA4433 IND → DCA Jul 11, 02:04 UTCJul 11, 02:55 UTC51m
2026-07-10 RPA4585 BOS → IND Jul 10, 22:49 UTCJul 11, 00:51 UTC2h 2m
2026-07-10 RPA4585 BOS → IND Jul 10, 22:50 UTCJul 11, 00:50 UTC2h 0m
2026-07-10 RPA4760 - Jul 10, 19:10 UTCJul 10, 21:00 UTC1h 50m
2026-07-10 RPA4760 BOS → CVG Jul 10, 16:15 UTCJul 10, 18:10 UTC1h 55m
2026-07-10 RPA4716 IND → BOS Jul 10, 13:05 UTCJul 10, 14:55 UTC1h 50m
2026-07-10 RPA4664 DCA → IND Jul 10, 10:50 UTCJul 10, 12:05 UTC1h 15m
2026-07-10 RPA4664 DCA → IND Jul 10, 10:48 UTCJul 10, 12:04 UTC1h 16m
2026-07-10 RPA4555 - Jul 10, 02:10 UTCJul 10, 03:30 UTC1h 20m
2026-07-10 RPA4555 - Jul 10, 00:25 UTCJul 10, 01:30 UTC1h 5m
2026-07-09 RPA4590 - Jul 9, 19:55 UTCJul 9, 20:35 UTC40m
2026-07-09 RPA4590 LGA → DCA Jul 9, 19:14 UTCJul 9, 19:38 UTC24m
2026-07-09 RPA4590 LGA → DCA Jul 9, 19:15 UTCJul 9, 20:35 UTC1h 20m
2026-07-09 RPA4422 - Jul 9, 15:25 UTCJul 9, 17:45 UTC2h 20m
2026-07-09 RPA4422 - Jul 9, 12:15 UTCJul 9, 13:45 UTC1h 30m
2026-07-09 RPA4522 PHL → SDF Jul 9, 10:05 UTCJul 9, 11:00 UTC55m
2026-07-09 RPA4522 PHL → SDF Jul 9, 10:05 UTCJul 9, 11:00 UTC55m
2026-07-09 RPA4616 BOS → BUF Jul 9, 00:25 UTCJul 9, 01:25 UTC1h 0m
2026-07-08 RPA4374 LGA → BOS Jul 8, 22:55 UTCJul 8, 23:30 UTC35m
2026-07-08 RPA4697 - Jul 8, 20:10 UTCJul 8, 21:40 UTC1h 30m
2026-07-08 RPA4697 CAE → LGA Jul 8, 20:07 UTCJul 8, 21:38 UTC1h 31m
2026-07-08 RPA4697 - Jul 8, 17:50 UTCJul 8, 19:15 UTC1h 25m
2026-07-08 RPA9929 RDU → LGA Jul 8, 15:50 UTCJul 8, 17:00 UTC1h 10m
2026-07-08 RPA4531 - Jul 8, 12:05 UTCJul 8, 13:00 UTC55m
2026-07-08 RPA4531 PIT → RDU Jul 8, 12:03 UTCJul 8, 12:59 UTC56m
2026-07-08 RPA4493 LGA → BNA Jul 8, 01:40 UTCJul 8, 01:55 UTC15m
2026-07-08 RPA4493 LGA → BNA Jul 8, 01:00 UTCJul 8, 01:55 UTC55m

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 N113HQ page for operator, model, and routing details .

Mode-S A03816 frequently asked

What is Mode-S code A03816?
A03816 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N113HQ.
Where is Mode-S A03816 registered?
Mode-S code A03816 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 A03816 broadcasting right now?
Yes. Mode-S A03816 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A03816, octal 50034026, decimal 10,500,118.
What flights does A03816 operate?
Mode-S A03816 has broadcast 20 distinct callsigns, including RPA4352, RPA4745, RPA4569, RPA4534, RPA4709.