Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

ABC5B8

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N858GT · BOEING 747-8 · operated by WILMINGTON TRUST CO TRUSTEE

Hex
ABC5B8
Octal
52742670
Decimal
11,257,272
Country
US
Tail
N858GT
Type
B748
No current signal · last broadcast Jul 26, 20:20 UTC
Flights observed
218
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:20 UTC

Last known position

Most recent position reported by Mode-S ABC5B8.

Country allocation

The ICAO 24-bit address ABC5B8 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
GTI538 - 17 2026-07-04
GTI8904 Atlas Air 16 2026-06-10
GTI537 - 14 2026-07-03
GTI8187 Atlas Air 10 2026-06-08
GTI8050 - 8 2026-07-08
GTI8030 Atlas Air 8 2026-07-23
GTI5421 Atlas Air 8 2026-06-07
GTI8676 Atlas Air 7 2026-05-29
GTI654 Atlas Air 7 2026-04-14
GTI8832 Atlas Air 6 2026-06-10
GTI8209 Atlas Air 6 2026-07-25
GTI046 - 6 2026-05-02
GTI5420 Atlas Air 5 2026-06-06
GTI8185 - 4 2026-07-10
GTI8028 Atlas Air 4 2026-05-30
GTI802 - 4 2026-07-14
GTI757 - 4 2026-06-28
GTI8992 Atlas Air 3 2026-05-10
GTI8971 Atlas Air 3 2026-05-07
GTI8869 Atlas Air 3 2026-04-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 GTI8228 ANC → MIA Jul 26, 20:05 UTCJul 26, 20:20 UTC15m
2026-07-26 GTI8755 LAX → ICN Jul 26, 17:05 UTCJul 26, 17:25 UTC20m
2026-07-26 GTI8755 LAX → ICN Jul 26, 14:25 UTCJul 26, 15:55 UTC1h 30m
2026-07-25 GTI8209 MIA → AMS Jul 25, 06:25 UTCJul 25, 06:55 UTC30m
2026-07-24 GTI8209 MIA → AMS Jul 24, 19:35 UTCJul 25, 05:40 UTC10h 5m
2026-07-24 GTI8209 MIA → AMS Jul 24, 08:00 UTCJul 24, 16:05 UTC8h 5m
2026-07-23 GTI8208 UIO → MIA Jul 23, 17:25 UTCJul 24, 03:50 UTC10h 25m
2026-07-23 GTI8030 LAX → GRU Jul 23, 10:45 UTCJul 23, 13:35 UTC2h 50m
2026-07-23 GTI8030 LAX → GRU Jul 23, 00:45 UTCJul 23, 08:05 UTC7h 20m
2026-07-22 GTI8030 LAX → GRU Jul 22, 13:00 UTCJul 22, 19:50 UTC6h 50m
2026-07-22 GTI8030 LAX → GRU Jul 22, 01:40 UTCJul 22, 05:25 UTC3h 45m
2026-07-20 GTI9131 MIA → ANC Jul 20, 14:55 UTCJul 21, 01:20 UTC10h 24m
2026-07-20 GTI9131 MIA → ANC Jul 20, 04:35 UTCJul 20, 12:30 UTC7h 55m
2026-07-19 GTI557 ANC → ORD Jul 19, 17:35 UTCJul 20, 00:45 UTC7h 10m
2026-07-19 GTI557 ANC → ORD Jul 19, 05:20 UTCJul 19, 14:50 UTC9h 30m
2026-07-18 GTI554 ORD → ANC Jul 18, 20:30 UTCJul 18, 20:45 UTC15m
2026-07-18 GTI554 ORD → ANC Jul 18, 18:00 UTCJul 18, 18:25 UTC25m
2026-07-14 GTI803 - Jul 14, 22:00 UTCJul 15, 11:25 UTC13h 24m
2026-07-14 GTI802 ANC → ORD Jul 14, 13:00 UTCJul 14, 18:05 UTC5h 5m
2026-07-13 GTI802 ICN → ANC Jul 13, 20:10 UTCJul 14, 11:00 UTC14h 50m
2026-07-11 GTI801 ORD → ICN Jul 11, 23:20 UTCJul 12, 12:30 UTC13h 10m
2026-07-11 GTI804 ANC → ORD Jul 11, 14:20 UTCJul 11, 19:55 UTC5h 35m
2026-07-11 GTI804 - Jul 11, 04:15 UTCJul 11, 11:35 UTC7h 20m
2026-07-10 GTI803 - Jul 10, 21:00 UTCJul 10, 21:40 UTC40m
2026-07-10 GTI8185 - Jul 10, 05:00 UTCJul 10, 05:20 UTC20m
2026-07-09 GTI8185 - Jul 9, 18:15 UTCJul 10, 04:15 UTC10h 0m
2026-07-09 GTI5219 - Jul 9, 06:05 UTCJul 9, 14:05 UTC8h 0m
2026-07-08 GTI8050 - Jul 8, 14:35 UTCJul 9, 02:45 UTC12h 10m
2026-07-08 GTI8050 - Jul 8, 04:25 UTCJul 8, 11:35 UTC7h 10m
2026-07-07 GTI8050 ANC → MIA Jul 7, 17:20 UTCJul 8, 00:50 UTC7h 30m
2026-07-07 GTI8050 HKG → ANC Jul 7, 01:50 UTCJul 7, 11:15 UTC9h 25m
2026-07-06 GTI9845 - Jul 6, 00:15 UTCJul 6, 14:55 UTC14h 40m
2026-07-05 GTI9845 - Jul 5, 16:15 UTCJul 5, 21:15 UTC5h 0m
2026-07-04 GTI538 - Jul 4, 11:30 UTCJul 4, 18:55 UTC7h 25m
2026-07-03 GTI538 - Jul 3, 18:00 UTCJul 4, 08:10 UTC14h 10m
2026-07-03 GTI538 - Jul 3, 12:05 UTCJul 4, 08:10 UTC20h 5m
2026-07-03 GTI537 - Jul 3, 11:15 UTCJul 4, 08:10 UTC20h 55m
2026-07-03 GTI537 - Jul 3, 01:10 UTCJul 3, 08:55 UTC7h 45m
2026-07-02 GTI538 ANC → MIA Jul 2, 12:20 UTCJul 2, 19:35 UTC7h 15m
2026-07-01 GTI538 - Jul 1, 18:45 UTCJul 2, 08:55 UTC14h 10m
2026-07-01 GTI538 - Jul 1, 12:35 UTCJul 2, 08:55 UTC20h 20m
2026-07-01 GTI537 MPB → ANC Jul 1, 02:30 UTCJul 1, 10:05 UTC7h 35m
2026-06-30 GTI538 - Jun 30, 15:25 UTCJun 30, 22:50 UTC7h 25m
2026-06-29 GTI538 - Jun 29, 16:04 UTCJun 30, 13:05 UTC21h 1m
2026-06-29 GTI538 - Jun 29, 14:34 UTCJun 30, 13:05 UTC22h 31m
2026-06-29 GTI537 - Jun 29, 08:44 UTCJun 30, 07:40 UTC22h 56m
2026-06-29 GTI537 ORD → ANC Jun 29, 00:39 UTCJun 29, 06:14 UTC5h 35m
2026-06-28 GTI757 - Jun 28, 08:00 UTCJun 28, 13:40 UTC5h 40m
2026-06-27 GTI757 ICN → ANC Jun 27, 16:35 UTCJun 28, 05:40 UTC13h 5m
2026-06-26 GTI756 ORD → ICN Jun 26, 19:39 UTCJun 27, 09:29 UTC13h 50m

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 N858GT page for operator, model, and routing details .

Mode-S ABC5B8 frequently asked

What is Mode-S code ABC5B8?
ABC5B8 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N858GT.
Where is Mode-S ABC5B8 registered?
Mode-S code ABC5B8 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 ABC5B8 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABC5B8, octal 52742670, decimal 11,257,272.
What flights does ABC5B8 operate?
Mode-S ABC5B8 has broadcast 20 distinct callsigns, including GTI538, GTI8904, GTI537, GTI8187, GTI8050.