Apparatus

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sensors Mode-S transponder

A0AB4F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N142NE · AIRBUS HELICOPTERS EC-145 · operated by NEW ENGLAND LIFE FLIGHT INC DBA, BOSTON MEDFLIGHT

Hex
A0AB4F
Octal
50125517
Decimal
10,529,615
Country
US
Tail
N142NE
Type
EC45
No current signal · last broadcast 1h ago
Flights observed
180
Distinct callsigns
1
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A0AB4F.

Country allocation

The ICAO 24-bit address A0AB4F 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
N142NE - 180 2026-05-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 N142NE BED → LWM May 30, 00:50 UTCMay 30, 01:00 UTC10m
2026-05-29 N142NE - May 29, 15:55 UTCMay 29, 16:15 UTC20m
2026-05-29 N142NE - May 29, 14:30 UTCMay 29, 14:50 UTC20m
2026-05-27 N142NE - May 27, 17:10 UTCMay 27, 17:20 UTC10m
2026-05-27 N142NE - May 27, 14:50 UTCMay 27, 15:00 UTC10m
2026-05-27 N142NE - May 27, 12:15 UTCMay 27, 13:50 UTC1h 35m
2026-05-26 N142NE - May 26, 13:50 UTCMay 26, 14:09 UTC20m
2026-05-25 N142NE - May 25, 21:54 UTCMay 25, 23:24 UTC1h 30m
2026-05-25 N142NE - May 25, 17:25 UTCMay 25, 18:15 UTC50m
2026-05-22 N142NE - May 22, 15:40 UTCMay 22, 17:10 UTC1h 30m
2026-05-22 N142NE - May 22, 14:40 UTCMay 22, 15:00 UTC20m
2026-05-22 N142NE - May 22, 12:55 UTCMay 22, 13:25 UTC30m
2026-05-22 N142NE - May 22, 12:00 UTCMay 22, 12:10 UTC10m
2026-05-22 N142NE - May 22, 07:50 UTCMay 22, 08:10 UTC20m
2026-05-22 N142NE - May 22, 06:55 UTCMay 22, 07:05 UTC10m
2026-05-22 N142NE - May 22, 05:45 UTCMay 22, 05:55 UTC10m
2026-05-22 N142NE - May 22, 04:50 UTCMay 22, 05:00 UTC10m
2026-05-22 N142NE - May 22, 03:45 UTCMay 22, 04:00 UTC15m
2026-05-22 N142NE - May 22, 01:30 UTCMay 22, 01:55 UTC25m
2026-05-21 N142NE - May 21, 22:55 UTCMay 21, 23:10 UTC15m
2026-05-21 N142NE - May 21, 20:05 UTCMay 21, 21:25 UTC1h 20m
2026-05-20 N142NE - May 20, 15:55 UTCMay 20, 16:10 UTC15m
2026-05-20 N142NE - May 20, 13:20 UTCMay 20, 13:50 UTC30m
2026-05-20 N142NE - May 20, 12:00 UTCMay 20, 12:15 UTC15m
2026-05-20 N142NE - May 20, 03:40 UTCMay 20, 03:55 UTC15m
2026-05-20 N142NE - May 20, 02:20 UTCMay 20, 02:45 UTC25m
2026-05-20 N142NE - May 20, 01:30 UTCMay 20, 01:45 UTC15m
2026-05-19 N142NE - May 19, 23:20 UTCMay 20, 00:00 UTC40m
2026-05-18 N142NE - May 18, 23:05 UTCMay 18, 23:25 UTC20m
2026-05-18 N142NE - May 18, 17:25 UTCMay 18, 18:05 UTC40m
2026-05-17 N142NE - May 17, 23:20 UTCMay 17, 23:40 UTC20m
2026-05-17 N142NE - May 17, 21:55 UTCMay 17, 22:40 UTC45m
2026-05-17 N142NE - May 17, 20:35 UTCMay 17, 20:45 UTC10m
2026-05-17 N142NE - May 17, 19:45 UTCMay 17, 20:01 UTC15m
2026-05-17 N142NE - May 17, 19:01 UTCMay 17, 19:10 UTC10m
2026-05-17 N142NE - May 17, 06:35 UTCMay 17, 06:55 UTC20m
2026-05-17 N142NE - May 17, 03:35 UTCMay 17, 05:40 UTC2h 5m
2026-05-16 N142NE - May 16, 16:20 UTCMay 16, 17:01 UTC40m
2026-05-16 N142NE - May 16, 15:35 UTCMay 16, 15:45 UTC10m
2026-05-16 N142NE - May 16, 14:41 UTCMay 16, 14:51 UTC10m
2026-05-16 N142NE - May 16, 12:40 UTCMay 16, 13:15 UTC35m
2026-05-14 N142NE - May 14, 06:15 UTCMay 14, 06:35 UTC20m
2026-05-14 N142NE - May 14, 04:10 UTCMay 14, 04:25 UTC15m
2026-05-14 N142NE - May 14, 02:15 UTCMay 14, 03:30 UTC1h 15m
2026-05-13 N142NE - May 13, 14:25 UTCMay 13, 14:40 UTC15m
2026-05-13 N142NE - May 13, 08:40 UTCMay 13, 09:30 UTC50m
2026-05-13 N142NE - May 13, 01:05 UTCMay 13, 02:00 UTC55m
2026-05-12 N142NE - May 12, 23:45 UTCMay 13, 00:10 UTC25m
2026-05-12 N142NE - May 12, 18:25 UTCMay 12, 18:35 UTC10m
2026-05-12 N142NE - May 12, 17:00 UTCMay 12, 17:35 UTC35m

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 N142NE page for operator, model, and routing details .

Mode-S A0AB4F frequently asked

What is Mode-S code A0AB4F?
A0AB4F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N142NE.
Where is Mode-S A0AB4F registered?
Mode-S code A0AB4F 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 A0AB4F 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 A0AB4F, octal 50125517, decimal 10,529,615.
What flights does A0AB4F operate?
Mode-S A0AB4F has broadcast 1 distinct callsign, including N142NE.