Apparatus

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sensors Mode-S transponder

A01F73

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N107HQ · EMBRAER ERJ-170-200 (long wing) · operated by REPUBLIC AIRWAYS INC

Hex
A01F73
Octal
50017563
Decimal
10,493,811
Country
US
Tail
N107HQ
Type
E75L
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
750
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S A01F73.

Country allocation

The ICAO 24-bit address A01F73 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
RPA4735 Republic Airlines 11 2026-07-21
RPA4545 - 10 2026-07-04
RPA4805 - 9 2026-07-12
RPA4709 - 8 2026-07-17
RPA4652 Republic Airlines 8 2026-07-22
RPA4468 - 8 2026-07-16
RPA4364 Republic Airlines 8 2026-06-09
RPA4697 - 7 2026-06-28
RPA4665 - 7 2026-07-18
RPA4611 - 7 2026-06-16
RPA4720 Republic Airlines 6 2026-07-26
RPA4636 Republic Airlines 6 2026-06-04
RPA4628 Republic Airlines 6 2026-06-01
RPA4493 - 6 2026-07-12
RPA4378 - 6 2026-07-02
RPA4354 - 6 2026-07-15
RPA4346 Republic Airlines 6 2026-06-05
RPA4344 - 6 2026-06-17
RPA4342 - 6 2026-07-08
RPA4755 Republic Airlines 5 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RPA4729 CHS → DCA Jul 26, 22:25 UTCJul 26, 22:45 UTC20m
2026-07-26 RPA4720 MCI → LGA Jul 26, 20:05 UTCJul 26, 21:00 UTC55m
2026-07-26 RPA4760 JFK → CLE Jul 26, 16:30 UTCJul 26, 18:20 UTC1h 50m
2026-07-26 RPA4691 JFK → RIC Jul 26, 14:10 UTCJul 26, 15:20 UTC1h 10m
2026-07-26 RPA4505 CVG → BOS Jul 26, 11:10 UTCJul 26, 12:25 UTC1h 15m
2026-07-25 RPA4755 JFK → RDU Jul 25, 19:10 UTCJul 25, 21:00 UTC1h 50m
2026-07-25 RPA4755 JFK → RDU Jul 25, 16:05 UTCJul 25, 18:10 UTC2h 5m
2026-07-25 RPA4687 JFK → DCA Jul 25, 12:30 UTCJul 25, 14:30 UTC2h 0m
2026-07-25 RPA4692 BNA → PHL Jul 25, 00:40 UTCJul 25, 02:55 UTC2h 15m
2026-07-25 RPA4692 BNA → PHL Jul 25, 00:39 UTCJul 25, 02:53 UTC2h 14m
2026-07-24 RPA4384 LGA → GSO Jul 24, 21:15 UTCJul 24, 23:10 UTC1h 55m
2026-07-24 RPA4748 DCA → ACK Jul 24, 17:45 UTCJul 24, 19:55 UTC2h 10m
2026-07-24 RPA4748 DCA → ACK Jul 24, 14:40 UTCJul 24, 16:30 UTC1h 50m
2026-07-24 RPA4683 LGA → CHO Jul 24, 10:45 UTCJul 24, 12:35 UTC1h 50m
2026-07-24 RPA4589 LGA → ATL Jul 24, 01:30 UTCJul 24, 02:25 UTC55m
2026-07-23 RPA4437 MHT → DCA Jul 23, 22:40 UTCJul 24, 00:20 UTC1h 40m
2026-07-23 RPA4600 LGA → IND Jul 23, 19:40 UTCJul 23, 21:25 UTC1h 45m
2026-07-23 RPA4600 LGA → IND Jul 23, 19:38 UTCJul 23, 21:23 UTC1h 45m
2026-07-23 RPA4496 LGA → BUF Jul 23, 17:00 UTCJul 23, 18:05 UTC1h 5m
2026-07-23 RPA4496 LGA → BUF Jul 23, 14:25 UTCJul 23, 15:40 UTC1h 15m
2026-07-23 RPA4604 CMH → LGA Jul 23, 11:45 UTCJul 23, 13:05 UTC1h 20m
2026-07-23 RPA4604 CMH → LGA Jul 23, 11:45 UTCJul 23, 13:03 UTC1h 18m
2026-07-22 RPA4462 LGA → CMH Jul 22, 21:45 UTCJul 22, 23:00 UTC1h 15m
2026-07-22 RPA4496 LGA → BUF Jul 22, 17:05 UTCJul 22, 18:15 UTC1h 10m
2026-07-22 RPA4496 LGA → BUF Jul 22, 14:35 UTCJul 22, 15:50 UTC1h 15m
2026-07-22 RPA4604 CMH → LGA Jul 22, 11:55 UTCJul 22, 13:20 UTC1h 25m
2026-07-22 RPA4361 BTV → DCA Jul 22, 02:30 UTCJul 22, 03:35 UTC1h 5m
2026-07-22 RPA4652 ORD → RDU Jul 22, 00:05 UTCJul 22, 01:05 UTC1h 0m
2026-07-21 RPA4652 ORD → RDU Jul 21, 20:30 UTCJul 21, 21:45 UTC1h 15m
2026-07-21 RPA4652 ORD → RDU Jul 21, 20:30 UTCJul 21, 21:55 UTC1h 25m
2026-07-21 RPA4735 PHL → SDF Jul 21, 17:15 UTCJul 21, 18:10 UTC55m
2026-07-21 RPA4735 PHL → SDF Jul 21, 17:09 UTCJul 21, 18:09 UTC1h 0m
2026-07-21 RPA4735 PHL → SDF Jul 21, 15:15 UTCJul 21, 16:05 UTC50m
2026-07-21 RPA4613 - Jul 21, 12:15 UTCJul 21, 13:40 UTC1h 25m
2026-07-20 RPA4517 DCA → IND Jul 20, 21:56 UTCJul 20, 23:13 UTC1h 17m
2026-07-20 RPA4517 DCA → IND Jul 20, 22:00 UTCJul 20, 23:15 UTC1h 15m
2026-07-20 RPA4753 - Jul 20, 18:25 UTCJul 20, 19:35 UTC1h 10m
2026-07-20 RPA4753 SDF → DCA Jul 20, 18:22 UTCJul 20, 19:36 UTC1h 14m
2026-07-20 RPA4753 DCA → SDF Jul 20, 16:05 UTCJul 20, 17:15 UTC1h 10m
2026-07-20 RPA4671 JFK → DCA Jul 20, 14:10 UTCJul 20, 15:00 UTC50m
2026-07-20 RPA4657 - Jul 20, 10:15 UTCJul 20, 11:50 UTC1h 35m
2026-07-20 RPA4776 - Jul 20, 03:30 UTCJul 20, 04:15 UTC45m
2026-07-20 RPA4776 ORD → CVG Jul 20, 03:29 UTCJul 20, 04:02 UTC33m
2026-07-19 RPA4492 - Jul 19, 23:55 UTCJul 20, 00:45 UTC50m
2026-07-19 RPA4492 RDU → ORD Jul 19, 23:53 UTCJul 20, 01:36 UTC1h 43m
2026-07-19 RPA4436 PHL → BOS Jul 19, 20:55 UTCJul 19, 22:45 UTC1h 50m
2026-07-19 RPA4730 BOS → IND Jul 19, 18:58 UTCJul 19, 19:40 UTC42m
2026-07-19 RPA4730 BOS → IND Jul 19, 19:00 UTCJul 19, 19:40 UTC40m
2026-07-19 RPA4543 DCA → MSY Jul 19, 15:45 UTCJul 19, 17:00 UTC1h 15m
2026-07-19 RPA4543 DCA → MSY Jul 19, 13:35 UTCJul 19, 14:35 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 N107HQ page for operator, model, and routing details .

Mode-S A01F73 frequently asked

What is Mode-S code A01F73?
A01F73 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N107HQ.
Where is Mode-S A01F73 registered?
Mode-S code A01F73 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 A01F73 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 A01F73, octal 50017563, decimal 10,493,811.
What flights does A01F73 operate?
Mode-S A01F73 has broadcast 20 distinct callsigns, including RPA4735, RPA4545, RPA4805, RPA4709, RPA4652.