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sensors Mode-S transponder

A1F0B4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N224JQ · EMBRAER ERJ-170-200 (long wing) · operated by DELTA AIR LINES INC

Hex
A1F0B4
Octal
50370264
Decimal
10,612,916
Country
US
Tail
N224JQ
Type
E75L
Broadcasting now · callsign RPA5723 · 30,000 ft
Flights observed
703
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:35 UTC

Current position

A1F0B4 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A1F0B4 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
RPA5674 - 19 2026-07-12
RPA5657 - 12 2026-06-22
RPA5641 Republic Airlines 10 2026-07-25
RPA5761 - 9 2026-07-10
RPA5740 Republic Airlines 9 2026-07-23
RPA5731 - 9 2026-07-12
RPA5616 Republic Airlines 9 2026-07-24
RPA5597 Republic Airlines 9 2026-06-12
RPA5837 - 8 2026-07-13
RPA5649 Republic Airlines 8 2026-06-10
RPA5619 - 8 2026-07-13
RPA5606 Republic Airlines 8 2026-06-11
RPA5601 - 8 2026-07-11
RPA5598 - 8 2026-06-24
RPA5845 - 7 2026-06-24
RPA5803 Republic Airlines 7 2026-06-19
RPA5718 - 7 2026-07-04
RPA5711 Republic Airlines 7 2026-06-09
RPA5677 - 7 2026-07-03
RPA5787 - 6 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RPA5843 LGA → BOS Jul 26, 20:35 UTCJul 26, 21:35 UTC1h 0m
2026-07-26 RPA5673 BOS → CLE Jul 26, 16:30 UTCJul 26, 18:45 UTC2h 15m
2026-07-26 RPA5673 BOS → CLE Jul 26, 13:10 UTCJul 26, 15:15 UTC2h 5m
2026-07-25 RPA5752 BNA → LGA Jul 25, 23:40 UTCJul 26, 00:30 UTC50m
2026-07-25 RPA5820 LGA → BOS Jul 25, 20:10 UTCJul 25, 21:30 UTC1h 20m
2026-07-25 RPA5641 CLE → BOS Jul 25, 17:15 UTCJul 25, 18:40 UTC1h 25m
2026-07-25 RPA5641 CLE → BOS Jul 25, 17:14 UTCJul 25, 18:37 UTC1h 23m
2026-07-25 RPA5641 CLE → BOS Jul 25, 14:10 UTCJul 25, 15:35 UTC1h 25m
2026-07-25 RPA5631 JFK → PIT Jul 25, 10:50 UTCJul 25, 12:40 UTC1h 50m
2026-07-24 RPA5616 JFK → CMH Jul 24, 21:55 UTCJul 24, 23:50 UTC1h 55m
2026-07-24 RPA5829 JFK → DCA Jul 24, 19:25 UTCJul 24, 20:05 UTC40m
2026-07-24 RPA5829 JFK → DCA Jul 24, 17:25 UTCJul 24, 18:25 UTC1h 0m
2026-07-24 RPA5626 CMH → LGA Jul 24, 14:30 UTCJul 24, 16:10 UTC1h 40m
2026-07-24 RPA5626 CMH → LGA Jul 24, 10:35 UTCJul 24, 12:20 UTC1h 45m
2026-07-24 RPA5633 IND → BOS Jul 24, 03:40 UTCJul 24, 04:45 UTC1h 5m
2026-07-24 RPA5743 BOS → BNA Jul 24, 01:55 UTCJul 24, 02:40 UTC45m
2026-07-23 RPA5856 IND → LGA Jul 23, 23:15 UTCJul 24, 00:05 UTC50m
2026-07-23 RPA5856 IND → LGA Jul 23, 20:45 UTCJul 23, 21:40 UTC55m
2026-07-23 RPA5808 LGA → CLT Jul 23, 18:05 UTCJul 23, 18:55 UTC50m
2026-07-23 RPA5678 SDF → LGA Jul 23, 15:20 UTCJul 23, 16:55 UTC1h 35m
2026-07-23 RPA5678 SDF → LGA Jul 23, 12:45 UTCJul 23, 14:05 UTC1h 20m
2026-07-23 RPA5740 JFK → DCA Jul 23, 10:15 UTCJul 23, 11:05 UTC50m
2026-07-23 RPA5740 JFK → DCA Jul 23, 10:14 UTCJul 23, 11:04 UTC50m
2026-07-23 RPA5610 JFK → BNA Jul 23, 02:50 UTCJul 23, 04:00 UTC1h 10m
2026-07-22 RPA5738 LGA → DCA Jul 22, 23:20 UTCJul 23, 00:05 UTC45m
2026-07-22 RPA5715 ORD → BOS Jul 22, 19:55 UTCJul 22, 20:50 UTC55m
2026-07-22 RPA5715 ORD → BOS Jul 22, 17:55 UTCJul 22, 18:55 UTC1h 0m
2026-07-22 RPA5755 BOS → LGA Jul 22, 15:25 UTCJul 22, 16:15 UTC50m
2026-07-22 RPA5687 DCA → BOS Jul 22, 13:15 UTCJul 22, 14:25 UTC1h 10m
2026-07-22 RPA5687 - Jul 22, 11:10 UTCJul 22, 12:05 UTC55m
2026-07-21 RPA5710 CMH → LGA Jul 21, 10:10 UTCJul 21, 11:15 UTC1h 5m
2026-07-21 RPA5710 CMH → LGA Jul 21, 10:06 UTCJul 21, 11:15 UTC1h 9m
2026-07-21 RPA5704 BOS → DCA Jul 21, 02:50 UTCJul 21, 04:05 UTC1h 15m
2026-07-20 RPA5787 - Jul 20, 23:55 UTCJul 21, 01:05 UTC1h 10m
2026-07-20 RPA5680 BOS → CMH Jul 20, 20:40 UTCJul 20, 22:00 UTC1h 20m
2026-07-20 RPA5739 LGA → BNH Jul 20, 18:40 UTCJul 20, 19:35 UTC55m
2026-07-20 RPA5688 SDF → LGA Jul 20, 14:45 UTCJul 20, 16:30 UTC1h 45m
2026-07-20 RPA5688 SDF → LGA Jul 20, 11:35 UTCJul 20, 13:20 UTC1h 45m
2026-07-20 RPA5849 BOS → HPN Jul 20, 03:10 UTCJul 20, 03:50 UTC40m
2026-07-20 RPA5798 BOS → DCA Jul 20, 01:10 UTCJul 20, 01:50 UTC40m
2026-07-19 RPA5804 BOS → LGA Jul 19, 22:20 UTCJul 19, 23:00 UTC40m
2026-07-19 RPA5804 BOS → LGA Jul 19, 20:20 UTCJul 19, 21:00 UTC40m
2026-07-19 RPA5624 JAX → BOS Jul 19, 15:20 UTCJul 19, 16:05 UTC45m
2026-07-19 RPA5624 JAX → BOS Jul 19, 15:20 UTCJul 19, 16:05 UTC45m
2026-07-19 RPA5750 DCA → BOS Jul 19, 13:00 UTCJul 19, 13:50 UTC50m
2026-07-19 RPA5802 DCA → JFK Jul 19, 10:20 UTCJul 19, 11:05 UTC45m
2026-07-19 RPA5769 - Jul 19, 01:10 UTCJul 19, 01:40 UTC30m
2026-07-18 RPA5769 - Jul 18, 18:20 UTCJul 18, 20:35 UTC2h 15m
2026-07-18 RPA5783 DCA → BNA Jul 18, 14:35 UTCJul 18, 16:00 UTC1h 25m
2026-07-18 RPA5692 MCI → LGA Jul 18, 11:55 UTCJul 18, 13:10 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 N224JQ page for operator, model, and routing details .

Mode-S A1F0B4 frequently asked

What is Mode-S code A1F0B4?
A1F0B4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N224JQ.
Where is Mode-S A1F0B4 registered?
Mode-S code A1F0B4 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 A1F0B4 broadcasting right now?
Yes. Mode-S A1F0B4 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1F0B4, octal 50370264, decimal 10,612,916.
What flights does A1F0B4 operate?
Mode-S A1F0B4 has broadcast 20 distinct callsigns, including RPA5674, RPA5657, RPA5641, RPA5761, RPA5740.