Apparatus

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sensors Mode-S transponder

A5FFF9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N486MC · BOEING 747-400 · operated by UMB BANK NA TRUSTEE

Hex
A5FFF9
Octal
51377771
Decimal
10,878,969
Country
US
Tail
N486MC
Type
B744
No current signal · last broadcast Jul 26, 20:50 UTC
Flights observed
195
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:50 UTC

Last known position

Most recent position reported by Mode-S A5FFF9.

Country allocation

The ICAO 24-bit address A5FFF9 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
GTI8120 - 16 2026-07-02
GTI8117 - 15 2026-06-30
GTI8560 - 13 2026-06-26
GTI812 - 9 2026-07-08
GTI518 - 9 2026-07-03
GTI8559 - 7 2026-06-25
GTI8860 Atlas Air 6 2026-07-19
GTI8243 Atlas Air 6 2026-05-03
GTI8242 Atlas Air 6 2026-05-01
GTI8153 - 6 2026-07-21
GTI811 - 5 2026-07-09
GTI8537 - 4 2026-07-20
GTI8275 - 4 2026-07-05
GTI612 Atlas Air 4 2026-07-25
GTI364 Atlas Air 4 2026-06-19
GTI8676 Atlas Air 3 2026-06-08
GTI862 - 3 2026-07-14
GTI8373 Atlas Air 3 2026-05-10
GTI8290 Atlas Air 3 2026-07-23
GTI8274 - 3 2026-07-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 GTI8298 NGU → HHN Jul 26, 16:55 UTCJul 26, 20:50 UTC3h 55m
2026-07-26 GTI8298 NGU → HHN Jul 26, 11:40 UTCJul 26, 13:45 UTC2h 5m
2026-07-25 GTI612 HSV → MIA Jul 25, 07:30 UTCJul 25, 09:00 UTC1h 30m
2026-07-24 GTI612 HSV → MIA Jul 24, 21:40 UTCJul 25, 03:35 UTC5h 55m
2026-07-24 GTI612 HSV → MIA Jul 24, 09:40 UTCJul 24, 18:55 UTC9h 15m
2026-07-24 GTI612 HSV → MIA Jul 24, 04:35 UTCJul 24, 05:10 UTC35m
2026-07-23 GTI611 MIA → ANC Jul 23, 23:30 UTCJul 23, 23:45 UTC15m
2026-07-23 GTI8290 IND → HHN Jul 23, 12:45 UTCJul 23, 20:55 UTC8h 10m
2026-07-23 GTI8290 IND → HHN Jul 23, 04:00 UTCJul 23, 07:55 UTC3h 55m
2026-07-22 GTI8290 IND → HHN Jul 22, 16:25 UTCJul 23, 01:25 UTC9h 0m
2026-07-21 GTI8515 BIF → IAH Jul 21, 22:55 UTCJul 22, 12:45 UTC13h 50m
2026-07-21 GTI8158 - Jul 21, 19:00 UTCJul 21, 19:30 UTC30m
2026-07-21 GTI8153 - Jul 21, 10:40 UTCJul 21, 15:30 UTC4h 50m
2026-07-20 GTI8153 - Jul 20, 15:20 UTCJul 21, 11:55 UTC20h 34m
2026-07-20 GTI8537 - Jul 20, 01:00 UTCJul 20, 10:00 UTC9h 0m
2026-07-19 GTI8537 - Jul 19, 21:15 UTCJul 19, 21:45 UTC30m
2026-07-19 GTI8537 - Jul 19, 16:30 UTCJul 19, 17:00 UTC30m
2026-07-19 GTI8860 FOE → HHN Jul 19, 10:55 UTCJul 19, 14:10 UTC3h 15m
2026-07-19 GTI8860 FOE → HHN Jul 19, 02:05 UTCJul 19, 07:00 UTC4h 55m
2026-07-18 GTI8860 FOE → HHN Jul 18, 16:35 UTCJul 19, 00:00 UTC7h 25m
2026-07-18 GTI9191 ORD → ICN Jul 18, 07:15 UTCJul 18, 07:40 UTC25m
2026-07-17 GTI9191 ORD → ICN Jul 17, 21:00 UTCJul 18, 06:30 UTC9h 31m
2026-07-17 GTI8866 PSM → RMS Jul 17, 08:54 UTCJul 17, 17:09 UTC8h 15m
2026-07-17 GTI8865 BWI → IAH Jul 17, 04:10 UTCJul 17, 05:04 UTC55m
2026-07-16 GTI8865 BWI → IAH Jul 16, 16:49 UTCJul 17, 01:00 UTC8h 10m
2026-07-16 GTI863 - Jul 16, 08:20 UTCJul 16, 12:49 UTC4h 30m
2026-07-14 GTI862 - Jul 14, 10:20 UTCJul 15, 06:10 UTC19h 49m
2026-07-14 GTI862 - Jul 14, 10:05 UTCJul 15, 06:10 UTC20h 4m
2026-07-13 GTI862 HSV → LUX Jul 13, 09:15 UTCJul 13, 17:40 UTC8h 25m
2026-07-12 GTI604 - Jul 12, 18:01 UTCJul 13, 02:35 UTC8h 35m
2026-07-12 GTI8672 - Jul 12, 06:20 UTCJul 12, 14:25 UTC8h 5m
2026-07-12 GTI8860 - Jul 12, 01:45 UTCJul 12, 03:01 UTC1h 15m
2026-07-11 GTI8860 - Jul 11, 18:15 UTCJul 11, 23:20 UTC5h 5m
2026-07-11 GTI8860 ICN → ANC Jul 11, 08:30 UTCJul 11, 16:05 UTC7h 35m
2026-07-10 GTI893 - Jul 10, 03:15 UTCJul 10, 05:15 UTC2h 0m
2026-07-09 GTI892 ICN → NRT Jul 9, 16:25 UTCJul 10, 00:55 UTC8h 30m
2026-07-09 GTI811 - Jul 9, 05:45 UTCJul 9, 07:50 UTC2h 5m
2026-07-08 GTI811 - Jul 8, 18:10 UTCJul 9, 05:35 UTC11h 25m
2026-07-08 GTI812 ANC → YYZ Jul 8, 09:35 UTCJul 8, 15:15 UTC5h 40m
2026-07-07 GTI812 ICN → ANC Jul 7, 18:35 UTCJul 8, 07:30 UTC12h 55m
2026-07-07 GTI9511 - Jul 7, 03:40 UTCJul 7, 16:10 UTC12h 30m
2026-07-05 GTI8275 - Jul 5, 12:40 UTCJul 5, 17:10 UTC4h 30m
2026-07-04 GTI8275 - Jul 4, 17:05 UTCJul 5, 09:45 UTC16h 40m
2026-07-04 GTI8274 - Jul 4, 07:00 UTCJul 5, 03:55 UTC20h 55m
2026-07-03 GTI518 - Jul 3, 23:10 UTCJul 4, 03:50 UTC4h 40m
2026-07-03 GTI518 - Jul 3, 02:20 UTCJul 3, 21:20 UTC19h 0m
2026-07-02 GTI517 - Jul 2, 20:20 UTCJul 3, 20:15 UTC23h 55m
2026-07-02 GTI517 - Jul 2, 16:20 UTCJul 3, 15:40 UTC23h 20m
2026-07-02 GTI517 - Jul 2, 15:00 UTCJul 3, 14:15 UTC23h 15m
2026-07-02 GTI8120 ANC → ORD Jul 2, 06:30 UTCJul 2, 12:00 UTC5h 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 N486MC page for operator, model, and routing details .

Mode-S A5FFF9 frequently asked

What is Mode-S code A5FFF9?
A5FFF9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N486MC.
Where is Mode-S A5FFF9 registered?
Mode-S code A5FFF9 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 A5FFF9 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A5FFF9, octal 51377771, decimal 10,878,969.
What flights does A5FFF9 operate?
Mode-S A5FFF9 has broadcast 20 distinct callsigns, including GTI8120, GTI8117, GTI8560, GTI812, GTI518.