Apparatus

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sensors Mode-S transponder

A7EF4B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N610FR · AIRBUS A-321neo · operated by BANK OF UTAH TRUSTEE

Hex
A7EF4B
Octal
51767513
Decimal
11,005,771
Country
US
Tail
N610FR
Type
A21N
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
473
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S A7EF4B.

Country allocation

The ICAO 24-bit address A7EF4B 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
FFT4639 - 6 2026-07-12
FFT1280 - 6 2026-07-13
FFT317 - 5 2026-07-07
FFT2445 Frontier Airlines 5 2026-04-24
FFT70 Frontier Airlines 4 2026-07-07
FFT67 - 4 2026-07-13
FFT66 Frontier Airlines 4 2026-06-15
FFT3599 Frontier Airlines 4 2026-04-18
FFT3227 - 4 2026-07-08
FFT2940 - 4 2026-07-13
FFT2446 Frontier Airlines 4 2026-04-24
FFT2350 Frontier Airlines 4 2026-07-22
FFT2266 - 4 2026-06-24
FFT1993 Frontier Airlines 4 2026-07-22
FFT1965 Frontier Airlines 4 2026-06-10
FFT1918 - 4 2026-07-12
FFT1665 - 4 2026-07-13
FFT1279 - 4 2026-07-14
FFT1229 - 4 2026-07-14
FFT86 Frontier Airlines 3 2026-04-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 FFT3412 LAS → CVG Jul 26, 21:00 UTCJul 26, 22:45 UTC1h 45m
2026-07-26 FFT1875 MCO → LAS Jul 26, 14:30 UTCJul 26, 18:30 UTC4h 0m
2026-07-26 FFT3273 BWI → MCO Jul 26, 10:40 UTCJul 26, 12:25 UTC1h 45m
2026-07-26 FFT2310 CHS → PHL Jul 26, 02:38 UTCJul 26, 04:44 UTC2h 6m
2026-07-26 FFT2310 CHS → PHL Jul 26, 02:55 UTCJul 26, 04:45 UTC1h 50m
2026-07-25 FFT4190 CMH → MCO Jul 25, 22:15 UTCJul 26, 00:00 UTC1h 45m
2026-07-25 FFT2757 ONT → SFO Jul 25, 18:50 UTCJul 25, 20:45 UTC1h 55m
2026-07-25 FFT4454 IND → MCO Jul 25, 15:05 UTCJul 25, 16:45 UTC1h 40m
2026-07-25 FFT4454 IND → MCO Jul 25, 15:03 UTCJul 25, 16:44 UTC1h 41m
2026-07-25 FFT3761 MDW → ATL Jul 25, 11:35 UTCJul 25, 13:35 UTC2h 0m
2026-07-25 FFT2886 DFW → MCO Jul 25, 01:50 UTCJul 25, 04:15 UTC2h 25m
2026-07-24 FFT1481 MCO → DFW Jul 24, 21:50 UTCJul 25, 00:05 UTC2h 15m
2026-07-24 FFT4018 DFW → MCO Jul 24, 17:00 UTCJul 24, 19:10 UTC2h 10m
2026-07-24 FFT2885 MCO → DFW Jul 24, 12:55 UTCJul 24, 15:05 UTC2h 10m
2026-07-24 FFT4146 LAX → MCO Jul 24, 06:45 UTCJul 24, 11:10 UTC4h 25m
2026-07-24 FFT3316 SMF → LAX Jul 24, 03:00 UTCJul 24, 04:10 UTC1h 10m
2026-07-24 FFT2069 LAS → SMF Jul 24, 00:35 UTCJul 24, 01:45 UTC1h 10m
2026-07-23 FFT4244 RNO → LAS Jul 23, 20:20 UTCJul 23, 21:15 UTC55m
2026-07-23 FFT4243 MDW → MIA Jul 23, 17:50 UTCJul 23, 18:40 UTC50m
2026-07-23 FFT4243 MDW → MIA Jul 23, 17:56 UTCJul 23, 18:44 UTC48m
2026-07-23 FFT2145 PHL → LAS Jul 23, 12:50 UTCJul 23, 16:05 UTC3h 15m
2026-07-23 FFT2146 LAS → ORD Jul 23, 07:05 UTCJul 23, 10:10 UTC3h 5m
2026-07-23 FFT2017 CLE → LAS Jul 23, 00:05 UTCJul 23, 03:00 UTC2h 55m
2026-07-22 FFT3108 LAS → STL Jul 22, 19:45 UTCJul 22, 22:30 UTC2h 45m
2026-07-22 FFT1993 DEN → LAS Jul 22, 16:25 UTCJul 22, 17:50 UTC1h 25m
2026-07-22 FFT2350 LAS → DEN Jul 22, 13:25 UTCJul 22, 14:50 UTC1h 25m
2026-07-22 FFT2408 SEA → LAS Jul 22, 03:50 UTCJul 22, 05:20 UTC1h 30m
2026-07-21 FFT2275 ONT → SEA Jul 21, 23:10 UTCJul 22, 01:15 UTC2h 5m
2026-07-21 FFT2275 ONT → SEA Jul 21, 23:22 UTCJul 22, 01:14 UTC1h 52m
2026-07-21 FFT1357 LAS → ONT Jul 21, 21:20 UTCJul 21, 22:00 UTC40m
2026-07-21 FFT1357 LAS → ONT Jul 21, 21:18 UTCJul 21, 21:57 UTC39m
2026-07-21 FFT4891 ATL → LAS Jul 21, 15:20 UTCJul 21, 19:05 UTC3h 45m
2026-07-21 FFT3287 LGA → ATL Jul 21, 10:45 UTCJul 21, 12:45 UTC2h 0m
2026-07-21 FFT3288 ATL → LGA Jul 21, 01:40 UTCJul 21, 03:55 UTC2h 15m
2026-07-20 FFT152 CUN → ATL Jul 20, 20:30 UTCJul 20, 22:55 UTC2h 25m
2026-07-20 FFT153 ATL → CUN Jul 20, 16:30 UTCJul 20, 18:55 UTC2h 25m
2026-07-20 FFT1157 ORD → MCO Jul 20, 05:35 UTCJul 20, 07:15 UTC1h 40m
2026-07-20 FFT1157 ORD → MCO Jul 20, 05:19 UTCJul 20, 07:10 UTC1h 51m
2026-07-20 FFT1158 ATL → EWR Jul 20, 02:25 UTCJul 20, 04:10 UTC1h 45m
2026-07-19 FFT124 MBJ → ATL Jul 19, 22:10 UTCJul 19, 23:40 UTC1h 30m
2026-07-19 FFT124 MBJ → ATL Jul 19, 20:47 UTCJul 19, 23:35 UTC2h 48m
2026-07-19 FFT125 ATL → MBJ Jul 19, 16:50 UTCJul 19, 18:25 UTC1h 35m
2026-07-19 FFT125 ATL → MBJ Jul 19, 16:31 UTCJul 19, 19:14 UTC2h 43m
2026-07-19 FFT9810 RDU → ORD Jul 19, 00:15 UTCJul 19, 01:35 UTC1h 20m
2026-07-18 FFT4411 - Jul 18, 18:30 UTCJul 18, 20:45 UTC2h 15m
2026-07-18 FFT4412 - Jul 18, 14:45 UTCJul 18, 16:50 UTC2h 5m
2026-07-18 FFT2959 IAD → FLL Jul 18, 01:20 UTCJul 18, 03:30 UTC2h 11m
2026-07-17 FFT4410 ATL → IAD Jul 17, 22:06 UTCJul 17, 23:49 UTC1h 43m
2026-07-17 FFT4410 ATL → IAD Jul 17, 22:20 UTCJul 17, 23:50 UTC1h 30m
2026-07-17 FFT2428 LAS → ATL Jul 17, 15:55 UTCJul 17, 19:55 UTC4h 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 N610FR page for operator, model, and routing details .

Mode-S A7EF4B frequently asked

What is Mode-S code A7EF4B?
A7EF4B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N610FR.
Where is Mode-S A7EF4B registered?
Mode-S code A7EF4B 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 A7EF4B 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 A7EF4B, octal 51767513, decimal 11,005,771.
What flights does A7EF4B operate?
Mode-S A7EF4B has broadcast 20 distinct callsigns, including FFT4639, FFT1280, FFT317, FFT2445, FFT70.