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sensors Mode-S transponder

ABAC24

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N851MB · AEROSPATIALE AS-350 Ecureuil · operated by MED-TRANS CORP

Hex
ABAC24
Octal
52726044
Decimal
11,250,724
Country
US
Tail
N851MB
Type
AS50
No current signal · last broadcast Jul 26, 05:15 UTC
Flights observed
204
Distinct callsigns
1
Country
US
Last broadcast
Jul 26, 05:15 UTC

Last known position

Most recent position reported by Mode-S ABAC24.

Country allocation

The ICAO 24-bit address ABAC24 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 1 distinct

Callsign Airline Flights Last seen
N851MB - 204 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N851MB - Jul 26, 05:00 UTCJul 26, 05:15 UTC15m
2026-07-26 N851MB - Jul 26, 04:10 UTCJul 26, 04:45 UTC35m
2026-07-25 N851MB - Jul 25, 02:10 UTCJul 25, 02:30 UTC20m
2026-07-24 N851MB - Jul 24, 22:40 UTCJul 25, 00:05 UTC1h 25m
2026-07-24 N851MB - Jul 24, 20:50 UTCJul 24, 21:10 UTC20m
2026-07-24 N851MB - Jul 24, 19:15 UTCJul 24, 19:45 UTC30m
2026-07-23 N851MB - Jul 23, 17:50 UTCJul 23, 20:05 UTC2h 15m
2026-07-22 N851MB - Jul 22, 20:35 UTCJul 22, 21:00 UTC25m
2026-07-22 N851MB - Jul 22, 19:20 UTCJul 22, 19:35 UTC15m
2026-07-22 N851MB - Jul 22, 01:35 UTCJul 22, 02:30 UTC55m
2026-07-21 N851MB - Jul 21, 18:35 UTCJul 21, 19:55 UTC1h 20m
2026-07-18 N851MB - Jul 18, 23:15 UTCJul 18, 23:35 UTC20m
2026-07-18 N851MB - Jul 18, 20:50 UTCJul 18, 22:30 UTC1h 40m
2026-07-18 N851MB - Jul 18, 19:45 UTCJul 18, 20:05 UTC20m
2026-07-18 N851MB - Jul 18, 18:45 UTCJul 18, 18:55 UTC10m
2026-07-18 N851MB - Jul 18, 15:50 UTCJul 18, 16:20 UTC30m
2026-07-18 N851MB - Jul 18, 14:40 UTCJul 18, 15:00 UTC20m
2026-07-18 N851MB - Jul 18, 12:55 UTCJul 18, 14:00 UTC1h 5m
2026-07-16 N851MB - Jul 16, 16:55 UTCJul 16, 17:30 UTC35m
2026-07-16 N851MB - Jul 16, 15:45 UTCJul 16, 16:00 UTC15m
2026-07-16 N851MB - Jul 16, 14:50 UTCJul 16, 15:05 UTC15m
2026-07-16 N851MB - Jul 16, 04:10 UTCJul 16, 05:55 UTC1h 45m
2026-07-16 N851MB - Jul 16, 03:00 UTCJul 16, 03:10 UTC10m
2026-07-15 N851MB - Jul 15, 18:30 UTCJul 15, 19:55 UTC1h 25m
2026-07-14 N851MB - Jul 14, 12:25 UTCJul 14, 12:55 UTC30m
2026-07-14 N851MB - Jul 14, 11:30 UTCJul 14, 12:10 UTC40m
2026-07-14 N851MB - Jul 14, 10:25 UTCJul 14, 10:35 UTC10m
2026-07-12 N851MB - Jul 12, 17:01 UTCJul 12, 18:20 UTC1h 20m
2026-07-11 N851MB - Jul 11, 22:20 UTCJul 11, 23:35 UTC1h 15m
2026-07-11 N851MB - Jul 11, 21:15 UTCJul 11, 21:25 UTC10m
2026-07-11 N851MB - Jul 11, 19:50 UTCJul 11, 20:20 UTC30m
2026-07-11 N851MB - Jul 11, 18:50 UTCJul 11, 19:05 UTC15m
2026-07-11 N851MB - Jul 11, 16:55 UTCJul 11, 17:10 UTC15m
2026-07-11 N851MB - Jul 11, 14:55 UTCJul 11, 15:15 UTC20m
2026-07-08 N851MB - Jul 8, 19:55 UTCJul 8, 21:10 UTC1h 15m
2026-07-07 N851MB - Jul 7, 14:10 UTCJul 7, 14:45 UTC35m
2026-07-07 N851MB - Jul 7, 00:35 UTCJul 7, 01:10 UTC35m
2026-07-06 N851MB - Jul 6, 23:50 UTCJul 7, 00:20 UTC30m
2026-07-06 N851MB - Jul 6, 22:30 UTCJul 6, 23:05 UTC35m
2026-07-06 N851MB - Jul 6, 21:30 UTCJul 6, 22:15 UTC45m
2026-07-06 N851MB - Jul 6, 20:00 UTCJul 6, 20:10 UTC10m
2026-07-06 N851MB - Jul 6, 19:05 UTCJul 6, 19:20 UTC15m
2026-07-05 N851MB - Jul 5, 20:30 UTCJul 5, 20:55 UTC25m
2026-07-03 N851MB FNL → WBU Jul 3, 23:00 UTCJul 3, 23:30 UTC30m
2026-07-03 N851MB - Jul 3, 21:55 UTCJul 3, 22:45 UTC50m
2026-07-02 N851MB - Jul 2, 21:15 UTCJul 2, 21:50 UTC35m
2026-07-02 N851MB - Jul 2, 05:10 UTCJul 2, 05:25 UTC15m
2026-07-02 N851MB - Jul 2, 03:45 UTCJul 2, 04:25 UTC40m
2026-07-02 N851MB - Jul 2, 03:05 UTCJul 2, 03:15 UTC10m
2026-07-01 N851MB - Jul 1, 21:50 UTCJul 1, 22:15 UTC25m

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 N851MB page for operator, model, and routing details .

Mode-S ABAC24 frequently asked

What is Mode-S code ABAC24?
ABAC24 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N851MB.
Where is Mode-S ABAC24 registered?
Mode-S code ABAC24 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 ABAC24 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 05:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABAC24, octal 52726044, decimal 11,250,724.
What flights does ABAC24 operate?
Mode-S ABAC24 has broadcast 1 distinct callsign, including N851MB.