Apparatus

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sensors Mode-S transponder

500441

ICAO 24-bit transponder address

Currently assigned to T7-977 · GULFSTREAM 4

Hex
500441
Octal
24002101
Decimal
5,243,969
Tail
T7-977
Type
GLF4
No current signal · last broadcast 13d ago
Flights observed
13
Distinct callsigns
1
Country
-
Last broadcast
13d ago

Last known position

Most recent position reported by Mode-S 500441.

Callsign history 1 distinct

Callsign Airline Flights Last seen
T7977 - 13 2026-07-26

Recent flights last 13

DateFlightRouteTakeoffLandingDuration
2026-07-26 T7977 - Jul 26, 06:25 UTCJul 26, 06:50 UTC26m
2026-07-23 T7977 - Jul 23, 10:10 UTCJul 23, 10:40 UTC30m
2026-07-21 T7977 - Jul 21, 23:55 UTCJul 22, 00:35 UTC40m
2026-07-19 T7977 - Jul 19, 23:20 UTCJul 19, 23:30 UTC10m
2026-07-16 T7977 - Jul 16, 23:44 UTCJul 17, 13:05 UTC13h 20m
2026-07-15 T7977 - Jul 15, 07:45 UTCJul 15, 08:40 UTC55m
2026-07-14 T7977 - Jul 14, 04:00 UTCJul 14, 05:40 UTC1h 40m
2026-07-11 T7977 - Jul 11, 03:35 UTCJul 11, 03:45 UTC10m
2026-06-24 T7977 - Jun 24, 10:45 UTCJun 24, 12:09 UTC1h 25m
2026-06-24 T7977 - Jun 24, 09:34 UTCJun 24, 09:45 UTC10m
2026-06-18 T7977 - Jun 18, 10:15 UTCJun 18, 10:35 UTC20m
2026-06-17 T7977 - Jun 17, 10:20 UTCJun 17, 11:00 UTC40m
2026-06-13 T7977 - Jun 13, 01:05 UTCJun 13, 02:35 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 T7-977 page for operator, model, and routing details .

Mode-S 500441 frequently asked

What is Mode-S code 500441?
500441 is an ICAO 24-bit transponder address. Assigned to T7-977.
Is 500441 broadcasting right now?
No active broadcast right now. Last signal was 13d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 500441, octal 24002101, decimal 5,243,969.
What flights does 500441 operate?
Mode-S 500441 has broadcast 1 distinct callsign, including T7977.