sensors Mode-S transponder

ABB6DC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N854GT · BOEING 747-8 · operated by ATLAS AIR INC

Hex
ABB6DC
Octal
52733334
Decimal
11,253,468
Country
US
Tail
N854GT
Type
B748
No current signal · last broadcast 1h ago
Flights observed
80
Distinct callsigns
6
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S ABB6DC.

Country allocation

The ICAO 24-bit address ABB6DC 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 6 distinct

Callsign Airline Flights Last seen
GTI804 Atlas Air 34 2026-05-30
GTI803 Atlas Air 21 2026-05-28
GTI802 Atlas Air 16 2026-05-19
GTI801 Atlas Air 6 2026-05-23
GTI8994 Atlas Air 2 2026-04-20
GTI8993 Atlas Air 1 2026-04-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 GTI804 ORD → JFK May 30, 10:30 UTCMay 30, 11:00 UTC30m
2026-05-29 GTI804 ORD → JFK May 29, 19:10 UTCMay 30, 08:25 UTC13h 15m
2026-05-28 GTI803 EZE → MIA May 28, 20:00 UTCMay 29, 10:05 UTC14h 5m
2026-05-27 GTI804 ORD → JFK May 27, 19:30 UTCMay 28, 08:50 UTC13h 20m
2026-05-23 GTI801 TLV → LGG May 23, 18:15 UTCMay 24, 07:30 UTC13h 15m
2026-05-23 GTI804 ORD → JFK May 23, 07:50 UTCMay 23, 13:15 UTC5h 25m
2026-05-22 GTI804 ORD → JFK May 22, 16:00 UTCMay 23, 05:20 UTC13h 20m
2026-05-21 GTI803 EZE → MIA May 21, 20:25 UTCMay 22, 09:55 UTC13h 30m
2026-05-21 GTI804 ORD → JFK May 21, 11:20 UTCMay 21, 17:00 UTC5h 40m
2026-05-20 GTI804 ORD → JFK May 20, 19:05 UTCMay 21, 09:00 UTC13h 55m
2026-05-19 GTI803 EZE → MIA May 19, 18:20 UTCMay 20, 08:05 UTC13h 46m
2026-05-19 GTI802 PVG → ANC May 19, 08:20 UTCMay 19, 13:30 UTC5h 10m
2026-05-18 GTI802 PVG → ANC May 18, 22:50 UTCMay 19, 06:15 UTC7h 25m
2026-05-16 GTI801 TLV → LGG May 16, 19:20 UTCMay 17, 09:25 UTC14h 5m
2026-05-16 GTI804 ORD → JFK May 16, 09:01 UTCMay 16, 14:35 UTC5h 35m
2026-05-15 GTI804 ORD → JFK May 15, 22:45 UTCMay 16, 06:06 UTC7h 21m
2026-05-14 GTI803 EZE → MIA May 14, 22:40 UTCMay 15, 11:35 UTC12h 55m
2026-05-14 GTI804 ORD → JFK May 14, 11:25 UTCMay 14, 17:00 UTC5h 35m
2026-05-13 GTI804 ORD → JFK May 13, 18:45 UTCMay 14, 08:50 UTC14h 5m
2026-05-12 GTI803 EZE → MIA May 12, 20:05 UTCMay 13, 09:50 UTC13h 45m
2026-05-12 GTI802 PVG → ANC May 12, 11:35 UTCMay 12, 16:45 UTC5h 10m
2026-05-11 GTI802 PVG → ANC May 11, 19:35 UTCMay 12, 09:25 UTC13h 50m
2026-05-09 GTI804 ORD → JFK May 9, 07:30 UTCMay 9, 12:35 UTC5h 5m
2026-05-08 GTI804 ORD → JFK May 8, 22:50 UTCMay 9, 05:20 UTC6h 30m
2026-05-07 GTI803 EZE → MIA May 7, 18:30 UTCMay 8, 09:39 UTC15h 9m
2026-05-06 GTI804 ORD → JFK May 6, 23:35 UTCMay 7, 06:40 UTC7h 5m
2026-05-04 GTI802 PVG → ANC May 4, 21:20 UTCMay 5, 10:00 UTC12h 40m
2026-05-02 GTI801 TLV → LGG May 2, 21:35 UTCMay 3, 12:40 UTC15h 4m
2026-05-02 GTI804 ORD → JFK May 2, 13:00 UTCMay 2, 18:05 UTC5h 5m
2026-05-01 GTI804 ORD → JFK May 1, 21:05 UTCMay 2, 11:10 UTC14h 5m
2026-04-30 GTI803 EZE → MIA Apr 30, 21:50 UTCMay 1, 11:40 UTC13h 50m
2026-04-30 GTI804 ORD → JFK Apr 30, 13:20 UTCApr 30, 18:30 UTC5h 10m
2026-04-29 GTI804 ORD → JFK Apr 29, 20:50 UTCApr 30, 11:15 UTC14h 24m
2026-04-28 GTI803 EZE → MIA Apr 28, 23:54 UTCApr 29, 13:55 UTC14h 1m
2026-04-28 GTI802 PVG → ANC Apr 28, 07:45 UTCApr 28, 13:05 UTC5h 20m
2026-04-27 GTI802 PVG → ANC Apr 27, 16:05 UTCApr 28, 06:00 UTC13h 55m
2026-04-25 GTI801 TLV → LGG Apr 25, 22:40 UTCApr 26, 12:35 UTC13h 55m
2026-04-25 GTI804 ORD → JFK Apr 25, 12:30 UTCApr 25, 17:55 UTC5h 25m
2026-04-24 GTI804 ORD → JFK Apr 24, 20:30 UTCApr 25, 10:25 UTC13h 55m
2026-04-24 GTI803 EZE → MIA Apr 24, 00:35 UTCApr 24, 14:25 UTC13h 50m
2026-04-23 GTI804 ORD → JFK Apr 23, 15:35 UTCApr 23, 20:55 UTC5h 19m
2026-04-22 GTI804 ORD → JFK Apr 22, 23:30 UTCApr 23, 13:20 UTC13h 50m
2026-04-22 GTI803 EZE → MIA Apr 22, 06:50 UTCApr 22, 21:00 UTC14h 10m
2026-04-21 GTI802 PVG → ANC Apr 21, 21:55 UTCApr 22, 02:45 UTC4h 50m
2026-04-21 GTI802 PVG → ANC Apr 21, 08:15 UTCApr 21, 20:15 UTC12h 0m
2026-04-20 GTI801 TLV → LGG Apr 20, 15:25 UTCApr 21, 05:35 UTC14h 10m
2026-04-20 GTI8994 IND → HHN Apr 20, 07:20 UTCApr 20, 12:15 UTC4h 55m
2026-04-19 GTI8994 IND → HHN Apr 19, 20:45 UTCApr 20, 05:00 UTC8h 15m
2026-04-18 GTI8993 ORD → ICN Apr 18, 22:40 UTCApr 19, 12:35 UTC13h 55m
2026-04-18 GTI804 ORD → JFK Apr 18, 13:20 UTCApr 18, 18:30 UTC5h 10m

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 N854GT page for operator, model, and routing details .

Mode-S ABB6DC frequently asked

What is Mode-S code ABB6DC?
ABB6DC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N854GT.
Where is Mode-S ABB6DC registered?
Mode-S code ABB6DC 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 ABB6DC 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 ABB6DC, octal 52733334, decimal 11,253,468.
What flights does ABB6DC operate?
Mode-S ABB6DC has broadcast 6 distinct callsigns, including GTI804, GTI803, GTI802, GTI801, GTI8994.