Apparatus

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sensors Mode-S transponder

A2107B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N232FR · AIRBUS A-320 · operated by UMB BANK NA TRUSTEE

Hex
A2107B
Octal
50410173
Decimal
10,621,051
Country
US
Tail
N232FR
Type
A320
Transponder active on ground
Flights observed
428
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A2107B.

Country allocation

The ICAO 24-bit address A2107B 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
FFT2396 Frontier Airlines 10 2026-05-22
FFT1067 Frontier Airlines 10 2026-05-26
FFT3075 Frontier Airlines 7 2026-05-18
FFT4405 Frontier Airlines 6 2026-05-25
FFT3699 Frontier Airlines 6 2026-05-22
FFT3666 Frontier Airlines 6 2026-06-05
FFT3076 Frontier Airlines 6 2026-05-18
FFT2272 Frontier Airlines 6 2026-05-25
FFT3872 Frontier Airlines 5 2026-06-16
FFT3442 Frontier Airlines 5 2026-05-26
FFT3059 Frontier Airlines 5 2026-05-25
FFT1292 - 5 2026-07-11
FFT1261 Frontier Airlines 5 2026-06-02
FFT4092 - 4 2026-07-12
FFT3871 - 4 2026-06-16
FFT3322 Frontier Airlines 4 2026-05-25
FFT3229 Frontier Airlines 4 2026-06-05
FFT2996 Frontier Airlines 4 2026-06-05
FFT1500 Frontier Airlines 4 2026-06-02
FFT1402 Frontier Airlines 4 2026-06-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 FFT1690 - Jul 14, 17:10 UTCJul 14, 18:45 UTC1h 35m
2026-07-14 FFT3782 ATL → TPA Jul 14, 14:25 UTCJul 14, 15:25 UTC1h 0m
2026-07-14 FFT1853 TPA → ATL Jul 14, 11:40 UTCJul 14, 12:45 UTC1h 5m
2026-07-13 FFT3355 - Jul 13, 23:40 UTCJul 14, 02:05 UTC2h 25m
2026-07-13 FFT3324 - Jul 13, 20:15 UTCJul 13, 22:40 UTC2h 25m
2026-07-13 FFT2953 IAD → TPA Jul 13, 16:55 UTCJul 13, 18:55 UTC2h 0m
2026-07-13 FFT2954 TPA → IAD Jul 13, 13:15 UTCJul 13, 15:10 UTC1h 55m
2026-07-12 FFT1036 - Jul 12, 22:40 UTCJul 13, 01:01 UTC2h 20m
2026-07-12 FFT1035 TPA → DTW Jul 12, 19:15 UTCJul 12, 21:20 UTC2h 5m
2026-07-12 FFT1035 TPA → DTW Jul 12, 19:16 UTCJul 12, 21:19 UTC2h 3m
2026-07-12 FFT1537 - Jul 12, 15:35 UTCJul 12, 17:45 UTC2h 10m
2026-07-12 FFT4092 TPA → BWI Jul 12, 12:20 UTCJul 12, 14:20 UTC2h 0m
2026-07-12 FFT4092 TPA → BWI Jul 12, 12:27 UTCJul 12, 14:19 UTC1h 52m
2026-07-11 FFT3355 - Jul 11, 23:50 UTCJul 12, 02:10 UTC2h 20m
2026-07-11 FFT3324 TPA → ISP Jul 11, 20:15 UTCJul 11, 22:35 UTC2h 20m
2026-07-11 FFT201 PUJ → TPA Jul 11, 15:53 UTCJul 11, 18:15 UTC2h 22m
2026-07-11 FFT201 - Jul 11, 12:00 UTCJul 11, 18:20 UTC6h 20m
2026-07-11 FFT2746 DEN → TPA Jul 11, 07:35 UTCJul 11, 10:35 UTC3h 0m
2026-07-11 FFT1149 MSP → DEN Jul 11, 04:56 UTCJul 11, 06:13 UTC1h 17m
2026-07-11 FFT1149 MSP → DEN Jul 11, 04:50 UTCJul 11, 06:20 UTC1h 30m
2026-07-11 FFT1292 DEN → MSP Jul 11, 02:10 UTCJul 11, 03:50 UTC1h 40m
2026-07-11 FFT1292 DEN → MSP Jul 11, 01:54 UTCJul 11, 03:50 UTC1h 56m
2026-07-10 FFT3982 SLC → DEN Jul 10, 22:00 UTCJul 10, 23:15 UTC1h 15m
2026-07-10 FFT3981 DEN → SLC Jul 10, 19:30 UTCJul 10, 20:30 UTC1h 0m
2026-07-10 FFT4372 - Jul 10, 16:10 UTCJul 10, 18:00 UTC1h 50m
2026-07-10 FFT4371 DEN → SNA Jul 10, 13:10 UTCJul 10, 15:10 UTC2h 0m
2026-07-10 FFT4371 DEN → SNA Jul 10, 13:13 UTCJul 10, 15:08 UTC1h 55m
2026-07-10 FFT4069 DFW → DEN Jul 10, 03:25 UTCJul 10, 04:55 UTC1h 30m
2026-07-10 FFT2148 DEN → DFW Jul 10, 00:20 UTCJul 10, 01:50 UTC1h 30m
2026-07-09 FFT1863 - Jul 9, 20:45 UTCJul 9, 22:35 UTC1h 50m
2026-07-09 FFT1928 DEN → OKC Jul 9, 18:35 UTCJul 9, 19:45 UTC1h 10m
2026-07-09 FFT4768 - Jul 9, 15:55 UTCJul 9, 17:15 UTC1h 20m
2026-07-09 FFT1747 DEN → PHX Jul 9, 12:50 UTCJul 9, 14:20 UTC1h 30m
2026-07-09 FFT2047 - Jul 9, 01:25 UTCJul 9, 01:55 UTC30m
2026-07-09 FFT2047 GJT → DEN Jul 9, 00:23 UTCJul 9, 01:52 UTC1h 29m
2026-07-08 FFT2047 - Jul 8, 19:55 UTCJul 8, 22:20 UTC2h 25m
2026-07-08 FFT1816 DEN → AUS Jul 8, 16:25 UTCJul 8, 18:10 UTC1h 45m
2026-07-08 FFT2211 - Jul 8, 11:55 UTCJul 8, 14:30 UTC2h 35m
2026-07-08 FFT4186 DEN → DTW Jul 8, 02:30 UTCJul 8, 04:55 UTC2h 25m
2026-07-07 FFT3540 - Jul 7, 23:30 UTCJul 8, 00:45 UTC1h 15m
2026-07-07 FFT3540 LAS → DEN Jul 7, 22:16 UTCJul 8, 00:50 UTC2h 34m
2026-07-07 FFT2575 SLC → LAS Jul 7, 20:05 UTCJul 7, 21:05 UTC1h 0m
2026-07-07 FFT1268 LAX → SLC Jul 7, 17:35 UTCJul 7, 18:55 UTC1h 20m
2026-07-07 FFT3291 - Jul 7, 15:20 UTCJul 7, 16:00 UTC40m
2026-07-07 FFT2349 DEN → LAS Jul 7, 02:40 UTCJul 7, 04:05 UTC1h 25m
2026-07-07 FFT1677 - Jul 7, 00:00 UTCJul 7, 01:20 UTC1h 20m
2026-07-06 FFT1678 DEN → DSM Jul 6, 20:20 UTCJul 6, 21:35 UTC1h 15m
2026-07-06 FFT4968 - Jul 6, 15:30 UTCJul 6, 16:55 UTC1h 25m
2026-07-06 FFT2015 - Jul 6, 12:25 UTCJul 6, 13:50 UTC1h 25m
2026-07-05 FFT3934 BOI → DEN Jul 5, 22:00 UTCJul 5, 23:30 UTC1h 30m

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 N232FR page for operator, model, and routing details .

Mode-S A2107B frequently asked

What is Mode-S code A2107B?
A2107B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N232FR.
Where is Mode-S A2107B registered?
Mode-S code A2107B 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 A2107B broadcasting right now?
Mode-S A2107B is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2107B, octal 50410173, decimal 10,621,051.
What flights does A2107B operate?
Mode-S A2107B has broadcast 20 distinct callsigns, including FFT2396, FFT1067, FFT3075, FFT4405, FFT3699.