Apparatus

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sensors Mode-S transponder

A3E911

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N351FR · AIRBUS A-320neo · operated by UMB BANK NA TRUSTEE

Hex
A3E911
Octal
50764421
Decimal
10,742,033
Country
US
Tail
N351FR
Type
A20N
No current signal · last broadcast 1h ago
Flights observed
456
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A3E911.

Country allocation

The ICAO 24-bit address A3E911 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
FFT3219 - 5 2026-07-09
FFT2231 Frontier Airlines 5 2026-06-09
FFT1052 Frontier Airlines 5 2026-05-25
FFT4964 - 4 2026-06-21
FFT3439 - 4 2026-07-02
FFT2779 - 4 2026-07-05
FFT2575 Frontier Airlines 4 2026-06-09
FFT2348 - 4 2026-06-29
FFT2273 Frontier Airlines 4 2026-05-07
FFT1003 - 4 2026-07-05
FFT4989 - 3 2026-07-09
FFT4401 Frontier Airlines 3 2026-05-25
FFT4076 - 3 2026-07-07
FFT3983 Frontier Airlines 3 2026-04-25
FFT3982 - 3 2026-07-09
FFT3913 Frontier Airlines 3 2026-04-15
FFT3886 Frontier Airlines 3 2026-05-24
FFT3885 Frontier Airlines 3 2026-04-18
FFT3291 Frontier Airlines 3 2026-06-09
FFT3110 - 3 2026-06-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 FFT4561 - Jul 14, 02:40 UTCJul 14, 04:15 UTC1h 35m
2026-07-13 FFT2360 - Jul 13, 23:15 UTCJul 14, 01:30 UTC2h 15m
2026-07-13 FFT1790 PDX → DEN Jul 13, 19:35 UTCJul 13, 21:40 UTC2h 5m
2026-07-13 FFT4499 - Jul 13, 16:30 UTCJul 13, 18:10 UTC1h 40m
2026-07-13 FFT3155 - Jul 13, 13:05 UTCJul 13, 15:00 UTC1h 55m
2026-07-13 FFT4346 - Jul 13, 00:50 UTCJul 13, 02:50 UTC2h 0m
2026-07-12 FFT2341 - Jul 12, 21:45 UTCJul 12, 23:35 UTC1h 50m
2026-07-12 FFT3565 - Jul 12, 17:45 UTCJul 12, 20:05 UTC2h 20m
2026-07-12 FFT3566 - Jul 12, 14:01 UTCJul 12, 16:30 UTC2h 30m
2026-07-12 FFT1149 MSP → DEN Jul 12, 03:20 UTCJul 12, 04:45 UTC1h 25m
2026-07-12 FFT1292 DEN → MSP Jul 12, 00:25 UTCJul 12, 01:55 UTC1h 30m
2026-07-11 FFT3406 SEA → DEN Jul 11, 19:50 UTCJul 11, 21:55 UTC2h 5m
2026-07-11 FFT1175 DEN → SEA Jul 11, 15:45 UTCJul 11, 18:05 UTC2h 20m
2026-07-11 FFT3229 - Jul 11, 11:40 UTCJul 11, 13:35 UTC1h 55m
2026-07-11 FFT2996 - Jul 11, 03:35 UTCJul 11, 05:31 UTC1h 55m
2026-07-11 FFT2631 DFW → DEN Jul 11, 00:15 UTCJul 11, 02:15 UTC2h 0m
2026-07-10 FFT4070 DEN → DFW Jul 10, 21:10 UTCJul 10, 22:40 UTC1h 30m
2026-07-10 FFT4070 DEN → DFW Jul 10, 21:08 UTCJul 10, 22:35 UTC1h 27m
2026-07-10 FFT3293 ATL → DEN Jul 10, 17:15 UTCJul 10, 19:50 UTC2h 35m
2026-07-10 FFT3294 DEN → ATL Jul 10, 13:00 UTCJul 10, 15:25 UTC2h 25m
2026-07-10 FFT4061 - Jul 10, 02:10 UTCJul 10, 04:40 UTC2h 30m
2026-07-09 FFT1560 - Jul 9, 23:15 UTCJul 10, 01:00 UTC1h 45m
2026-07-09 FFT1560 DEN → MSN Jul 9, 22:30 UTCJul 10, 00:56 UTC2h 26m
2026-07-09 FFT3982 SLC → DEN Jul 9, 20:00 UTCJul 9, 21:20 UTC1h 20m
2026-07-09 FFT3219 DEN → SLC Jul 9, 17:40 UTCJul 9, 18:40 UTC1h 0m
2026-07-09 FFT3219 DEN → SLC Jul 9, 17:04 UTCJul 9, 18:39 UTC1h 35m
2026-07-09 FFT2818 - Jul 9, 14:35 UTCJul 9, 16:20 UTC1h 45m
2026-07-09 FFT2818 SAN → DEN Jul 9, 14:13 UTCJul 9, 16:17 UTC2h 4m
2026-07-09 FFT4989 - Jul 9, 06:30 UTCJul 9, 08:20 UTC1h 50m
2026-07-09 FFT2107 FSD → DEN Jul 9, 03:15 UTCJul 9, 04:45 UTC1h 30m
2026-07-09 FFT2108 DEN → FSD Jul 9, 00:50 UTCJul 9, 02:10 UTC1h 20m
2026-07-09 FFT2108 DEN → FSD Jul 9, 00:43 UTCJul 9, 02:21 UTC1h 38m
2026-07-08 FFT3293 ATL → DEN Jul 8, 20:20 UTCJul 8, 23:25 UTC3h 5m
2026-07-08 FFT3511 - Jul 8, 16:25 UTCJul 8, 18:30 UTC2h 5m
2026-07-08 FFT3058 - Jul 8, 13:10 UTCJul 8, 14:35 UTC1h 25m
2026-07-08 FFT1168 ATL → RDU Jul 8, 10:55 UTCJul 8, 12:00 UTC1h 5m
2026-07-08 FFT2717 - Jul 8, 01:55 UTCJul 8, 02:15 UTC20m
2026-07-08 FFT2717 FLL → ATL Jul 8, 01:47 UTCJul 8, 03:15 UTC1h 28m
2026-07-07 FFT2959 - Jul 7, 22:30 UTCJul 8, 00:45 UTC2h 15m
2026-07-07 FFT4410 ATL → IAD Jul 7, 19:20 UTCJul 7, 20:35 UTC1h 15m
2026-07-07 FFT4076 - Jul 7, 16:10 UTCJul 7, 17:45 UTC1h 35m
2026-07-07 FFT2399 - Jul 7, 13:00 UTCJul 7, 14:30 UTC1h 30m
2026-07-07 FFT3216 - Jul 7, 07:00 UTCJul 7, 10:55 UTC3h 55m
2026-07-07 FFT4082 - Jul 7, 04:00 UTCJul 7, 05:05 UTC1h 5m
2026-07-07 FFT2457 - Jul 7, 01:55 UTCJul 7, 02:40 UTC45m
2026-07-06 FFT3215 - Jul 6, 19:45 UTCJul 6, 23:55 UTC4h 10m
2026-07-06 FFT2498 - Jul 6, 16:35 UTCJul 6, 17:45 UTC1h 10m
2026-07-06 FFT2497 - Jul 6, 13:55 UTCJul 6, 14:55 UTC1h 0m
2026-07-06 FFT1263 - Jul 6, 10:25 UTCJul 6, 12:05 UTC1h 40m
2026-07-06 FFT1264 - Jul 6, 04:25 UTCJul 6, 05:50 UTC1h 25m

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 N351FR page for operator, model, and routing details .

Mode-S A3E911 frequently asked

What is Mode-S code A3E911?
A3E911 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N351FR.
Where is Mode-S A3E911 registered?
Mode-S code A3E911 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 A3E911 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3E911, octal 50764421, decimal 10,742,033.
What flights does A3E911 operate?
Mode-S A3E911 has broadcast 20 distinct callsigns, including FFT3219, FFT2231, FFT1052, FFT4964, FFT3439.