Apparatus

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sensors Mode-S transponder

A2680B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N254TH · operated by AEROSTAR

Hex
A2680B
Octal
50464013
Decimal
10,643,467
Country
US
Tail
N254TH
No current signal · last broadcast Jun 29, 06:59 UTC
Flights observed
58
Distinct callsigns
3
Country
US
Last broadcast
Jun 29, 06:59 UTC

Last known position

Most recent position reported by Mode-S A2680B.

Country allocation

The ICAO 24-bit address A2680B 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 3 distinct

Callsign Airline Flights Last seen
HBAL817 - 35 2026-06-28
HBAL816 - 22 2026-05-22
HBAL806 - 1 2026-04-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-28 HBAL817 - Jun 28, 12:50 UTCJun 29, 06:59 UTC18h 10m
2026-06-28 HBAL817 - Jun 28, 08:50 UTCJun 29, 06:59 UTC22h 10m
2026-06-28 HBAL817 - Jun 28, 06:49 UTCJun 29, 03:44 UTC20h 55m
2026-06-28 HBAL817 - Jun 28, 04:50 UTCJun 29, 03:44 UTC22h 55m
2026-06-28 HBAL817 - Jun 28, 02:49 UTCJun 29, 02:25 UTC23h 35m
2026-06-28 HBAL817 - Jun 28, 00:50 UTCJun 29, 00:44 UTC23h 55m
2026-06-27 HBAL817 - Jun 27, 22:49 UTCJun 28, 22:34 UTC23h 45m
2026-06-27 HBAL817 - Jun 27, 20:49 UTCJun 28, 20:45 UTC23h 55m
2026-06-27 HBAL817 - Jun 27, 16:49 UTCJun 28, 16:45 UTC23h 55m
2026-06-27 HBAL817 - Jun 27, 14:49 UTCJun 28, 14:45 UTC23h 55m
2026-06-27 HBAL817 - Jun 27, 12:50 UTCJun 28, 12:44 UTC23h 55m
2026-06-27 HBAL817 - Jun 27, 10:50 UTCJun 28, 10:44 UTC23h 55m
2026-06-27 HBAL817 - Jun 27, 08:49 UTCJun 28, 08:44 UTC23h 55m
2026-06-27 HBAL817 - Jun 27, 06:50 UTCJun 28, 06:44 UTC23h 55m
2026-06-27 HBAL817 - Jun 27, 04:49 UTCJun 28, 04:44 UTC23h 55m
2026-06-27 HBAL817 - Jun 27, 02:50 UTCJun 28, 02:44 UTC23h 55m
2026-06-27 HBAL817 - Jun 27, 00:50 UTCJun 28, 00:45 UTC23h 55m
2026-06-26 HBAL817 - Jun 26, 22:49 UTCJun 27, 22:45 UTC23h 55m
2026-06-26 HBAL817 - Jun 26, 20:50 UTCJun 27, 20:44 UTC23h 55m
2026-06-26 HBAL817 - Jun 26, 18:49 UTCJun 27, 18:45 UTC23h 55m
2026-06-26 HBAL817 - Jun 26, 16:49 UTCJun 27, 16:44 UTC23h 55m
2026-06-26 HBAL817 - Jun 26, 14:50 UTCJun 27, 14:45 UTC23h 55m
2026-06-26 HBAL817 - Jun 26, 12:50 UTCJun 27, 12:45 UTC23h 55m
2026-06-26 HBAL817 - Jun 26, 10:50 UTCJun 27, 10:45 UTC23h 55m
2026-06-26 HBAL817 - Jun 26, 08:50 UTCJun 27, 08:44 UTC23h 55m
2026-06-26 HBAL817 - Jun 26, 06:50 UTCJun 27, 06:44 UTC23h 55m
2026-06-26 HBAL817 - Jun 26, 04:50 UTCJun 27, 04:44 UTC23h 55m
2026-06-26 HBAL817 - Jun 26, 02:50 UTCJun 27, 02:45 UTC23h 55m
2026-06-26 HBAL817 - Jun 26, 00:50 UTCJun 27, 00:44 UTC23h 55m
2026-06-25 HBAL817 - Jun 25, 22:49 UTCJun 26, 22:44 UTC23h 55m
2026-06-25 HBAL817 - Jun 25, 20:49 UTCJun 26, 20:44 UTC23h 55m
2026-06-25 HBAL817 - Jun 25, 18:50 UTCJun 26, 18:44 UTC23h 55m
2026-06-25 HBAL817 - Jun 25, 16:50 UTCJun 26, 16:44 UTC23h 55m
2026-06-25 HBAL817 - Jun 25, 14:50 UTCJun 26, 14:44 UTC23h 55m
2026-06-25 HBAL817 - Jun 25, 13:55 UTCJun 26, 12:44 UTC22h 50m
2026-05-22 HBAL816 - May 22, 22:50 UTCMay 23, 18:00 UTC19h 10m
2026-05-22 HBAL816 - May 22, 20:50 UTCMay 23, 18:00 UTC21h 9m
2026-05-22 HBAL816 - May 22, 18:50 UTCMay 23, 18:00 UTC23h 10m
2026-05-22 HBAL816 - May 22, 16:50 UTCMay 23, 16:45 UTC23h 54m
2026-05-22 HBAL816 - May 22, 14:50 UTCMay 23, 14:45 UTC23h 54m
2026-05-22 HBAL816 - May 22, 12:50 UTCMay 23, 12:45 UTC23h 54m
2026-05-22 HBAL816 - May 22, 10:50 UTCMay 23, 10:45 UTC23h 55m
2026-05-22 HBAL816 - May 22, 08:50 UTCMay 23, 08:45 UTC23h 54m
2026-05-22 HBAL816 - May 22, 06:50 UTCMay 23, 06:45 UTC23h 54m
2026-05-22 HBAL816 - May 22, 04:50 UTCMay 23, 04:45 UTC23h 54m
2026-05-22 HBAL816 - May 22, 02:50 UTCMay 23, 02:45 UTC23h 54m
2026-05-22 HBAL816 - May 22, 00:50 UTCMay 23, 00:45 UTC23h 55m
2026-05-21 HBAL816 - May 21, 22:50 UTCMay 22, 22:45 UTC23h 55m
2026-05-21 HBAL816 - May 21, 20:50 UTCMay 22, 20:45 UTC23h 55m
2026-05-21 HBAL816 - May 21, 18:50 UTCMay 22, 18:45 UTC23h 55m

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 N254TH page for operator, model, and routing details .

Mode-S A2680B frequently asked

What is Mode-S code A2680B?
A2680B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N254TH.
Where is Mode-S A2680B registered?
Mode-S code A2680B 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 A2680B broadcasting right now?
No active broadcast right now. Last signal was Jun 29, 06:59 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2680B, octal 50464013, decimal 10,643,467.
What flights does A2680B operate?
Mode-S A2680B has broadcast 3 distinct callsigns, including HBAL817, HBAL816, HBAL806.