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sensors Mode-S transponder

A0345F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N112HQ · EMBRAER ERJ-170-200 (long wing) · operated by REPUBLIC AIRWAYS INC

Hex
A0345F
Octal
50032137
Decimal
10,499,167
Country
US
Tail
N112HQ
Type
E75L
No current signal · last broadcast Jul 26, 21:35 UTC
Flights observed
706
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:35 UTC

Last known position

Most recent position reported by Mode-S A0345F.

Country allocation

The ICAO 24-bit address A0345F 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
RPA4720 - 13 2026-07-07
RPA4607 - 12 2026-07-20
RPA4500 - 11 2026-07-13
RPA4412 - 10 2026-06-30
RPA4755 Republic Airlines 9 2026-05-20
RPA4704 - 9 2026-07-17
RPA4429 - 8 2026-06-21
RPA4639 Republic Airlines 7 2026-07-26
RPA4612 - 7 2026-06-22
RPA4350 Republic Airlines 7 2026-05-19
RPA4808 - 6 2026-06-27
RPA4767 Republic Airlines 6 2026-06-02
RPA4713 Republic Airlines 6 2026-05-03
RPA4630 Republic Airlines 6 2026-07-20
RPA4551 - 6 2026-07-21
RPA4530 Republic Airlines 6 2026-06-04
RPA4487 Republic Airlines 6 2026-06-10
RPA4470 Republic Airlines 6 2026-06-07
RPA4408 Republic Airlines 6 2026-07-21
RPA4368 Republic Airlines 6 2026-06-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RPA4563 BOS → SDF Jul 26, 19:50 UTCJul 26, 21:35 UTC1h 45m
2026-07-26 RPA4639 LGA → IAH Jul 26, 16:40 UTCJul 26, 17:45 UTC1h 5m
2026-07-26 RPA4639 LGA → IAH Jul 26, 16:36 UTCJul 26, 17:46 UTC1h 10m
2026-07-26 RPA4344 ORD → BOS Jul 26, 14:15 UTCJul 26, 15:25 UTC1h 10m
2026-07-26 RPA4531 SDF → DCA Jul 26, 12:05 UTCJul 26, 12:55 UTC50m
2026-07-25 RPA4569 ORD → BDL Jul 25, 23:55 UTCJul 26, 00:55 UTC1h 0m
2026-07-25 RPA4563 BOS → SDF Jul 25, 20:25 UTCJul 25, 22:10 UTC1h 45m
2026-07-25 RPA4658 JFK → RDU Jul 25, 17:15 UTCJul 25, 18:30 UTC1h 15m
2026-07-25 RPA4658 JFK → RDU Jul 25, 17:11 UTCJul 25, 18:24 UTC1h 13m
2026-07-25 RPA4712 ILM → LGA Jul 25, 13:55 UTCJul 25, 16:00 UTC2h 5m
2026-07-25 RPA4358 PHL → SDF Jul 25, 11:20 UTCJul 25, 12:45 UTC1h 25m
2026-07-25 RPA4679 JFK → IND Jul 25, 01:10 UTCJul 25, 02:15 UTC1h 5m
2026-07-25 RPA4679 JFK → IND Jul 25, 01:07 UTCJul 25, 02:12 UTC1h 5m
2026-07-24 RPA4679 JFK → IND Jul 24, 23:25 UTCJul 25, 00:25 UTC1h 0m
2026-07-24 RPA4543 DCA → MSY Jul 24, 18:50 UTCJul 24, 20:10 UTC1h 20m
2026-07-24 RPA4543 DCA → MSY Jul 24, 18:49 UTCJul 24, 20:04 UTC1h 15m
2026-07-24 RPA9930 SDF → LGA Jul 24, 16:30 UTCJul 24, 17:10 UTC40m
2026-07-24 RPA4491 DCA → LGA Jul 24, 14:35 UTCJul 24, 15:20 UTC45m
2026-07-24 RPA4491 LGA → DCA Jul 24, 12:50 UTCJul 24, 13:35 UTC45m
2026-07-24 RPA4677 DCA → ALB Jul 24, 09:20 UTCJul 24, 10:35 UTC1h 15m
2026-07-24 RPA4677 DCA → ALB Jul 24, 09:19 UTCJul 24, 10:18 UTC59m
2026-07-24 RPA4722 DTW → PHL Jul 24, 01:30 UTCJul 24, 02:45 UTC1h 15m
2026-07-23 RPA4702 GSP → PHL Jul 23, 23:30 UTCJul 23, 23:45 UTC15m
2026-07-23 RPA4702 GSP → PHL Jul 23, 23:25 UTCJul 24, 00:16 UTC51m
2026-07-23 RPA4340 DCA → BDL Jul 23, 20:00 UTCJul 23, 21:55 UTC1h 55m
2026-07-23 RPA4340 DCA → BDL Jul 23, 19:57 UTCJul 23, 21:53 UTC1h 56m
2026-07-23 RPA4340 DCA → BDL Jul 23, 17:10 UTCJul 23, 19:05 UTC1h 55m
2026-07-23 RPA4618 LGA → CVG Jul 23, 13:35 UTCJul 23, 15:10 UTC1h 35m
2026-07-23 RPA4618 LGA → CVG Jul 23, 11:20 UTCJul 23, 12:45 UTC1h 25m
2026-07-23 RPA4433 BOS → JFK Jul 23, 04:25 UTCJul 23, 05:30 UTC1h 5m
2026-07-23 RPA4585 BOS → IND Jul 23, 01:05 UTCJul 23, 03:20 UTC2h 15m
2026-07-23 RPA4585 BOS → IND Jul 23, 00:52 UTCJul 23, 03:09 UTC2h 17m
2026-07-22 RPA4370 PHL → BNA Jul 22, 23:15 UTCJul 23, 00:05 UTC50m
2026-07-22 RPA4606 ATL → LGA Jul 22, 16:45 UTCJul 22, 18:30 UTC1h 45m
2026-07-22 RPA4606 LGA → ATL Jul 22, 13:55 UTCJul 22, 15:45 UTC1h 50m
2026-07-22 RPA4799 - Jul 22, 11:15 UTCJul 22, 12:00 UTC45m
2026-07-21 RPA9942 - Jul 21, 19:05 UTCJul 21, 19:35 UTC30m
2026-07-21 RPA4408 YYZ → ORD Jul 21, 13:15 UTCJul 21, 14:55 UTC1h 40m
2026-07-21 RPA4551 DCA → JFK Jul 21, 10:45 UTCJul 21, 11:40 UTC55m
2026-07-21 RPA4551 DCA → JFK Jul 21, 10:43 UTCJul 21, 11:28 UTC45m
2026-07-21 RPA4719 LGA → DCA Jul 21, 00:31 UTCJul 21, 01:19 UTC48m
2026-07-21 RPA4719 LGA → DCA Jul 21, 00:35 UTCJul 21, 01:20 UTC45m
2026-07-20 RPA4630 DCA → LGA Jul 20, 21:40 UTCJul 20, 22:55 UTC1h 15m
2026-07-20 RPA4630 DCA → LGA Jul 20, 19:00 UTCJul 20, 20:20 UTC1h 20m
2026-07-20 RPA4620 - Jul 20, 15:00 UTCJul 20, 17:30 UTC2h 30m
2026-07-20 RPA4620 LGA → XNA Jul 20, 11:10 UTCJul 20, 13:40 UTC2h 30m
2026-07-20 RPA4607 - Jul 20, 01:10 UTCJul 20, 02:35 UTC1h 25m
2026-07-19 RPA4607 - Jul 19, 23:00 UTCJul 20, 00:20 UTC1h 20m
2026-07-19 RPA4473 PWM → DCA Jul 19, 15:05 UTCJul 19, 16:00 UTC55m
2026-07-18 RPA9936 DCA → ORF Jul 18, 18:55 UTCJul 18, 19:25 UTC30m

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 N112HQ page for operator, model, and routing details .

Mode-S A0345F frequently asked

What is Mode-S code A0345F?
A0345F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N112HQ.
Where is Mode-S A0345F registered?
Mode-S code A0345F 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 A0345F broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0345F, octal 50032137, decimal 10,499,167.
What flights does A0345F operate?
Mode-S A0345F has broadcast 20 distinct callsigns, including RPA4720, RPA4607, RPA4500, RPA4412, RPA4755.