Apparatus

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sensors Mode-S transponder

A3B0F3

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N337MR · operated by AMERICAN AIRLINES INC

Hex
A3B0F3
Octal
50730363
Decimal
10,727,667
Country
US
Tail
N337MR
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
733
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S A3B0F3.

Country allocation

The ICAO 24-bit address A3B0F3 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
ENY3749 - 14 2026-06-28
ENY4053 Envoy Air 9 2026-07-23
ENY3992 - 7 2026-07-06
ENY3787 Envoy Air 6 2026-07-21
ENY3724 Envoy Air 6 2026-07-17
ENY3641 - 6 2026-07-11
ENY3636 - 6 2026-07-15
ENY3560 Envoy Air 6 2026-04-24
ENY3464 Envoy Air 6 2026-07-25
ENY3338 Envoy Air 6 2026-05-26
ENY4126 - 5 2026-06-23
ENY4112 Envoy Air 5 2026-04-24
ENY4048 - 5 2026-07-07
ENY3927 Envoy Air 5 2026-06-14
ENY3795 - 5 2026-07-11
ENY3709 Envoy Air 5 2026-05-03
ENY3651 Envoy Air 5 2026-05-22
ENY3606 - 5 2026-07-03
ENY3543 Envoy Air 5 2026-04-24
ENY3495 - 5 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ENY3717 ORD → PIT Jul 26, 22:25 UTCJul 26, 22:45 UTC20m
2026-07-26 ENY3908 BNA → ORD Jul 26, 19:00 UTCJul 26, 20:30 UTC1h 30m
2026-07-26 ENY4076 BUF → ORD Jul 26, 15:55 UTCJul 26, 17:49 UTC1h 54m
2026-07-26 ENY4076 BUF → ORD Jul 26, 15:55 UTCJul 26, 17:30 UTC1h 35m
2026-07-26 ENY3773 PVD → ORD Jul 26, 12:40 UTCJul 26, 14:45 UTC2h 5m
2026-07-26 ENY3597 RDU → ORD Jul 26, 03:40 UTCJul 26, 05:40 UTC2h 0m
2026-07-26 ENY3597 RDU → ORD Jul 26, 03:38 UTCJul 26, 05:39 UTC2h 1m
2026-07-26 ENY4165 PHX → XNA Jul 26, 00:30 UTCJul 26, 02:05 UTC1h 35m
2026-07-25 ENY4165 PHX → XNA Jul 25, 21:45 UTCJul 25, 23:15 UTC1h 30m
2026-07-25 ENY3464 ORD → ALB Jul 25, 19:30 UTCJul 25, 20:25 UTC55m
2026-07-25 ENY3464 ORD → ALB Jul 25, 19:25 UTCJul 25, 20:20 UTC55m
2026-07-25 ENY3464 ORD → ALB Jul 25, 17:50 UTCJul 25, 18:35 UTC45m
2026-07-25 ENY3879 MLI → DFW Jul 25, 13:10 UTCJul 25, 15:55 UTC2h 45m
2026-07-25 ENY3923 DFW → MID Jul 25, 02:20 UTCJul 25, 05:10 UTC2h 50m
2026-07-25 ENY4192 GSO → ORD Jul 25, 00:25 UTCJul 25, 00:55 UTC30m
2026-07-24 ENY4192 GSO → ORD Jul 24, 22:40 UTCJul 24, 23:00 UTC20m
2026-07-24 ENY3650 ORD → SYR Jul 24, 17:15 UTCJul 24, 20:50 UTC3h 35m
2026-07-24 ENY3906 PNS → MIA Jul 24, 13:50 UTCJul 24, 15:35 UTC1h 45m
2026-07-24 ENY3832 FSD → ORD Jul 24, 02:55 UTCJul 24, 04:50 UTC1h 55m
2026-07-23 ENY3826 PIA → ORD Jul 23, 23:15 UTCJul 24, 00:40 UTC1h 25m
2026-07-23 ENY3826 PIA → ORD Jul 23, 23:12 UTCJul 24, 01:18 UTC2h 6m
2026-07-23 ENY3826 PIA → ORD Jul 23, 20:00 UTCJul 23, 22:05 UTC2h 5m
2026-07-23 ENY4099 BHM → ORD Jul 23, 17:00 UTCJul 23, 18:25 UTC1h 25m
2026-07-23 ENY4099 BHM → ORD Jul 23, 14:35 UTCJul 23, 16:05 UTC1h 30m
2026-07-23 ENY3874 ORD → CVG Jul 23, 05:05 UTCJul 23, 12:55 UTC7h 50m
2026-07-23 ENY4053 BUF → ORD Jul 23, 02:30 UTCJul 23, 03:55 UTC1h 25m
2026-07-22 ENY4053 BUF → ORD Jul 22, 23:55 UTCJul 23, 01:25 UTC1h 30m
2026-07-22 ENY3348 BOS → CVG Jul 22, 17:40 UTCJul 22, 22:05 UTC4h 25m
2026-07-22 ENY4038 - Jul 22, 14:00 UTCJul 22, 16:05 UTC2h 5m
2026-07-22 ENY4038 TUL → PHX Jul 22, 13:59 UTCJul 22, 16:04 UTC2h 5m
2026-07-22 ENY3426 ORD → CVG Jul 22, 12:40 UTCJul 22, 13:15 UTC35m
2026-07-22 ENY3426 ORD → CVG Jul 22, 12:36 UTCJul 22, 13:12 UTC36m
2026-07-22 ENY3647 ABI → DFW Jul 22, 10:21 UTCJul 22, 10:54 UTC33m
2026-07-22 ENY3705 MHK → ORD Jul 22, 00:20 UTCJul 22, 00:35 UTC15m
2026-07-22 ENY3705 MHK → ORD Jul 22, 00:15 UTCJul 22, 00:44 UTC29m
2026-07-21 ENY3582 - Jul 21, 20:35 UTCJul 21, 22:10 UTC1h 35m
2026-07-21 ENY3582 - Jul 21, 17:45 UTCJul 21, 19:25 UTC1h 40m
2026-07-21 ENY3708 BOS → STL Jul 21, 15:35 UTCJul 21, 16:25 UTC50m
2026-07-21 ENY3708 BOS → STL Jul 21, 13:55 UTCJul 21, 14:40 UTC45m
2026-07-21 ENY4120 - Jul 21, 10:40 UTCJul 21, 11:25 UTC45m
2026-07-21 ENY3686 MSP → ORD Jul 21, 03:50 UTCJul 21, 04:30 UTC40m
2026-07-21 ENY3686 MSP → ORD Jul 21, 03:50 UTCJul 21, 04:41 UTC51m
2026-07-21 ENY3787 IND → DCA Jul 21, 01:10 UTCJul 21, 02:25 UTC1h 15m
2026-07-21 ENY3787 IND → DCA Jul 21, 01:05 UTCJul 21, 02:19 UTC1h 14m
2026-07-20 ENY3787 IND → DCA Jul 20, 23:00 UTCJul 21, 00:05 UTC1h 5m
2026-07-20 ENY3726 AUS → DFW Jul 20, 21:00 UTCJul 20, 21:40 UTC40m
2026-07-20 ENY3726 AUS → DFW Jul 20, 20:56 UTCJul 20, 21:41 UTC45m
2026-07-20 ENY3726 - Jul 20, 19:00 UTCJul 20, 19:35 UTC35m
2026-07-20 ENY9866 - Jul 20, 16:20 UTCJul 20, 17:05 UTC45m
2026-07-19 ENY9872 - Jul 19, 02:15 UTCJul 19, 02:50 UTC35m

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 N337MR page for operator, model, and routing details .

Mode-S A3B0F3 frequently asked

What is Mode-S code A3B0F3?
A3B0F3 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N337MR.
Where is Mode-S A3B0F3 registered?
Mode-S code A3B0F3 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 A3B0F3 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 A3B0F3, octal 50730363, decimal 10,727,667.
What flights does A3B0F3 operate?
Mode-S A3B0F3 has broadcast 20 distinct callsigns, including ENY3749, ENY4053, ENY3992, ENY3787, ENY3724.