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sensors Mode-S transponder

A0433B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N116HQ · EMBRAER ERJ-170-200 (long wing) · operated by REPUBLIC AIRWAYS INC

Hex
A0433B
Octal
50041473
Decimal
10,502,971
Country
US
Tail
N116HQ
Type
E75L
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
762
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S A0433B.

Country allocation

The ICAO 24-bit address A0433B 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
RPA4412 - 11 2026-06-24
RPA4738 Republic Airlines 9 2026-07-23
RPA4449 Republic Airlines 9 2026-07-25
RPA4440 Republic Airlines 8 2026-07-21
RPA4434 - 8 2026-06-25
RPA4768 - 7 2026-07-08
RPA4745 - 7 2026-06-30
RPA4720 - 7 2026-06-21
RPA4704 Republic Airlines 7 2026-06-13
RPA4553 - 7 2026-07-16
RPA4530 - 7 2026-06-24
RPA4500 - 7 2026-06-30
RPA4764 Republic Airlines 6 2026-07-25
RPA4701 Republic Airlines 6 2026-07-25
RPA4680 Republic Airlines 6 2026-05-20
RPA4633 - 6 2026-07-01
RPA4630 - 6 2026-07-02
RPA4580 Republic Airlines 6 2026-05-07
RPA4537 - 6 2026-07-18
RPA4435 - 6 2026-07-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RPA4374 SDF → PHL Jul 26, 22:15 UTCJul 26, 22:45 UTC30m
2026-07-26 RPA4375 MCI → DCA Jul 26, 18:35 UTCJul 26, 19:25 UTC50m
2026-07-26 RPA4375 MCI → DCA Jul 26, 18:35 UTCJul 26, 19:26 UTC51m
2026-07-26 RPA4375 MCI → DCA Jul 26, 16:40 UTCJul 26, 17:15 UTC35m
2026-07-26 RPA4491 CMH → PHL Jul 26, 14:40 UTCJul 26, 15:25 UTC45m
2026-07-26 RPA4339 LGA → IAH Jul 26, 11:40 UTCJul 26, 13:05 UTC1h 25m
2026-07-26 RPA4362 DCA → LGA Jul 26, 09:45 UTCJul 26, 10:30 UTC45m
2026-07-26 RPA4362 DCA → LGA Jul 26, 09:43 UTCJul 26, 10:24 UTC41m
2026-07-25 RPA4449 JFK → IND Jul 25, 20:04 UTCJul 25, 21:38 UTC1h 34m
2026-07-25 RPA4449 JFK → IND Jul 25, 20:05 UTCJul 25, 21:40 UTC1h 35m
2026-07-25 RPA4592 LGA → MCI Jul 25, 16:40 UTCJul 25, 18:20 UTC1h 40m
2026-07-25 RPA4592 LGA → MCI Jul 25, 16:35 UTCJul 25, 18:18 UTC1h 43m
2026-07-25 RPA4701 DCA → IND Jul 25, 14:15 UTCJul 25, 15:35 UTC1h 20m
2026-07-25 RPA4339 LGA → IAH Jul 25, 11:15 UTCJul 25, 12:40 UTC1h 25m
2026-07-25 RPA4419 GSO → LGA Jul 25, 03:30 UTCJul 25, 05:05 UTC1h 35m
2026-07-25 RPA4764 ILM → BOS Jul 25, 01:10 UTCJul 25, 02:10 UTC1h 0m
2026-07-25 RPA4764 ILM → BOS Jul 25, 01:01 UTCJul 25, 02:02 UTC1h 1m
2026-07-24 RPA4764 ILM → BOS Jul 24, 22:50 UTCJul 24, 23:45 UTC55m
2026-07-24 RPA4340 DCA → BDL Jul 24, 19:00 UTCJul 24, 20:30 UTC1h 30m
2026-07-24 RPA4340 DCA → BDL Jul 24, 18:55 UTCJul 24, 20:26 UTC1h 31m
2026-07-24 RPA4340 DCA → BDL Jul 24, 16:45 UTCJul 24, 18:10 UTC1h 25m
2026-07-24 RPA4654 LGA → DCA Jul 24, 15:00 UTCJul 24, 15:50 UTC50m
2026-07-24 RPA4669 MIA → BTV Jul 24, 11:05 UTCJul 24, 13:10 UTC2h 5m
2026-07-23 RPA4728 CMH → LGA Jul 23, 23:15 UTCJul 24, 01:30 UTC2h 15m
2026-07-23 RPA4394 DCA → PHL Jul 23, 20:00 UTCJul 23, 21:25 UTC1h 25m
2026-07-23 RPA4394 DCA → PHL Jul 23, 17:35 UTCJul 23, 18:55 UTC1h 20m
2026-07-23 RPA4483 RDU → LGA Jul 23, 14:55 UTCJul 23, 15:55 UTC1h 0m
2026-07-23 RPA4483 RDU → LGA Jul 23, 12:45 UTCJul 23, 14:00 UTC1h 15m
2026-07-23 RPA4424 PVD → DCA Jul 23, 10:15 UTCJul 23, 11:05 UTC50m
2026-07-23 RPA4738 DCA → MCI Jul 23, 03:05 UTCJul 23, 04:35 UTC1h 30m
2026-07-22 RPA4738 DCA → MCI Jul 22, 17:10 UTCJul 22, 18:40 UTC1h 30m
2026-07-22 RPA4635 ORD → LGA Jul 22, 14:45 UTCJul 22, 15:25 UTC40m
2026-07-22 RPA4635 ORD → LGA Jul 22, 14:39 UTCJul 22, 15:09 UTC30m
2026-07-22 RPA4635 ORD → LGA Jul 22, 12:50 UTCJul 22, 13:35 UTC45m
2026-07-22 RPA4642 - Jul 22, 11:10 UTCJul 22, 11:35 UTC25m
2026-07-22 RPA4642 CMH → BOS Jul 22, 10:07 UTCJul 22, 11:28 UTC1h 21m
2026-07-21 RPA9694 JFK → PIT Jul 21, 21:20 UTCJul 21, 22:15 UTC55m
2026-07-21 RPA4440 PWM → DCA Jul 21, 19:05 UTCJul 21, 20:30 UTC1h 25m
2026-07-21 RPA4666 - Jul 21, 15:55 UTCJul 21, 16:55 UTC1h 0m
2026-07-21 RPA4666 BOS → BUF Jul 21, 13:55 UTCJul 21, 15:05 UTC1h 10m
2026-07-21 RPA4788 - Jul 21, 11:30 UTCJul 21, 12:25 UTC55m
2026-07-21 RPA4788 BUF → BOS Jul 21, 11:25 UTCJul 21, 12:22 UTC57m
2026-07-21 RPA4616 BOS → BUF Jul 21, 00:35 UTCJul 21, 01:45 UTC1h 10m
2026-07-20 RPA4374 LGA → BOS Jul 20, 23:05 UTCJul 20, 23:45 UTC40m
2026-07-20 RPA4394 - Jul 20, 20:10 UTCJul 20, 21:30 UTC1h 20m
2026-07-20 RPA4394 CMH → LGA Jul 20, 20:08 UTCJul 20, 21:30 UTC1h 22m
2026-07-20 RPA4394 LGA → CMH Jul 20, 17:40 UTCJul 20, 18:55 UTC1h 15m
2026-07-20 RPA4379 - Jul 20, 15:25 UTCJul 20, 16:30 UTC1h 5m
2026-07-20 RPA4379 LGA → BUF Jul 20, 13:40 UTCJul 20, 14:35 UTC55m
2026-07-20 RPA4799 - Jul 20, 10:40 UTCJul 20, 11:55 UTC1h 15m

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 N116HQ page for operator, model, and routing details .

Mode-S A0433B frequently asked

What is Mode-S code A0433B?
A0433B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N116HQ.
Where is Mode-S A0433B registered?
Mode-S code A0433B 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 A0433B broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0433B, octal 50041473, decimal 10,502,971.
What flights does A0433B operate?
Mode-S A0433B has broadcast 20 distinct callsigns, including RPA4412, RPA4738, RPA4449, RPA4440, RPA4434.