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sensors Mode-S transponder

A4B158

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N401LF · BELL 407 · operated by LIFE FLIGHT NETWORK LLC

Hex
A4B158
Octal
51130530
Decimal
10,793,304
Country
US
Tail
N401LF
Type
B407
No current signal · last broadcast 6d ago
Flights observed
165
Distinct callsigns
1
Country
US
Last broadcast
6d ago

Last known position

Most recent position reported by Mode-S A4B158.

Country allocation

The ICAO 24-bit address A4B158 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
N401LF - 165 2026-07-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-08 N401LF - Jul 8, 16:25 UTCJul 8, 17:05 UTC40m
2026-07-08 N401LF - Jul 8, 15:35 UTCJul 8, 15:45 UTC10m
2026-07-08 N401LF - Jul 8, 01:20 UTCJul 8, 01:55 UTC35m
2026-07-08 N401LF - Jul 8, 00:40 UTCJul 8, 00:50 UTC10m
2026-07-07 N401LF - Jul 7, 23:55 UTCJul 8, 00:10 UTC15m
2026-07-07 N401LF - Jul 7, 21:20 UTCJul 7, 21:35 UTC15m
2026-07-07 N401LF - Jul 7, 20:05 UTCJul 7, 20:25 UTC20m
2026-07-07 N401LF - Jul 7, 03:55 UTCJul 7, 04:35 UTC40m
2026-07-07 N401LF - Jul 7, 03:05 UTCJul 7, 03:15 UTC10m
2026-07-06 N401LF - Jul 6, 20:35 UTCJul 6, 20:55 UTC20m
2026-07-04 N401LF - Jul 4, 22:20 UTCJul 4, 23:15 UTC55m
2026-07-03 N401LF - Jul 3, 09:25 UTCJul 3, 10:20 UTC55m
2026-07-03 N401LF - Jul 3, 08:05 UTCJul 3, 08:45 UTC40m
2026-07-02 N401LF - Jul 2, 01:30 UTCJul 2, 02:20 UTC50m
2026-07-01 N401LF COE → COE Jul 1, 22:10 UTCJul 1, 22:30 UTC20m
2026-07-01 N401LF - Jul 1, 21:10 UTCJul 1, 21:30 UTC20m
2026-07-01 N401LF - Jul 1, 19:05 UTCJul 1, 19:25 UTC20m
2026-07-01 N401LF - Jul 1, 03:30 UTCJul 1, 03:45 UTC15m
2026-06-21 N401LF - Jun 21, 19:50 UTCJun 21, 20:29 UTC40m
2026-06-21 N401LF - Jun 21, 19:00 UTCJun 21, 19:09 UTC10m
2026-06-21 N401LF - Jun 21, 15:44 UTCJun 21, 15:54 UTC10m
2026-06-20 N401LF - Jun 20, 21:49 UTCJun 20, 22:00 UTC10m
2026-06-20 N401LF - Jun 20, 17:34 UTCJun 20, 17:44 UTC10m
2026-06-20 N401LF SFF → COE Jun 20, 06:19 UTCJun 20, 06:35 UTC15m
2026-06-20 N401LF - Jun 20, 04:14 UTCJun 20, 04:34 UTC20m
2026-06-20 N401LF - Jun 20, 01:29 UTCJun 20, 01:44 UTC15m
2026-06-19 N401LF - Jun 19, 22:45 UTCJun 19, 23:00 UTC15m
2026-06-19 N401LF - Jun 19, 20:59 UTCJun 19, 21:09 UTC10m
2026-06-19 N401LF - Jun 19, 09:44 UTCJun 19, 09:59 UTC15m
2026-06-19 N401LF - Jun 19, 08:44 UTCJun 19, 08:50 UTC5m
2026-06-19 N401LF - Jun 19, 07:09 UTCJun 19, 07:19 UTC10m
2026-06-18 N401LF - Jun 18, 21:15 UTCJun 18, 21:30 UTC15m
2026-06-18 N401LF - Jun 18, 19:50 UTCJun 18, 20:00 UTC10m
2026-06-18 N401LF - Jun 18, 09:40 UTCJun 18, 10:10 UTC30m
2026-06-18 N401LF - Jun 18, 08:50 UTCJun 18, 09:05 UTC15m
2026-06-17 N401LF - Jun 17, 21:35 UTCJun 17, 22:45 UTC1h 10m
2026-06-17 N401LF - Jun 17, 20:05 UTCJun 17, 20:40 UTC35m
2026-06-16 N401LF - Jun 16, 23:50 UTCJun 17, 00:25 UTC35m
2026-06-16 N401LF - Jun 16, 22:45 UTCJun 16, 23:00 UTC15m
2026-06-16 N401LF COE → COE Jun 16, 17:10 UTCJun 16, 17:49 UTC40m
2026-06-16 N401LF - Jun 16, 02:29 UTCJun 16, 03:30 UTC1h 0m
2026-06-16 N401LF - Jun 16, 01:25 UTCJun 16, 01:40 UTC15m
2026-06-15 N401LF - Jun 15, 20:50 UTCJun 15, 22:49 UTC2h 0m
2026-06-14 N401LF - Jun 14, 16:40 UTCJun 14, 16:50 UTC10m
2026-06-14 N401LF - Jun 14, 10:40 UTCJun 14, 12:15 UTC1h 35m
2026-06-14 N401LF - Jun 14, 09:30 UTCJun 14, 09:45 UTC15m
2026-06-14 N401LF - Jun 14, 01:00 UTCJun 14, 02:05 UTC1h 5m
2026-06-13 N401LF - Jun 13, 23:40 UTCJun 14, 00:25 UTC45m
2026-06-13 N401LF - Jun 13, 22:25 UTCJun 13, 23:00 UTC35m
2026-06-13 N401LF - Jun 13, 11:15 UTCJun 13, 12:15 UTC1h 0m

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 N401LF page for operator, model, and routing details .

Mode-S A4B158 frequently asked

What is Mode-S code A4B158?
A4B158 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N401LF.
Where is Mode-S A4B158 registered?
Mode-S code A4B158 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 A4B158 broadcasting right now?
No active broadcast right now. Last signal was 6d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4B158, octal 51130530, decimal 10,793,304.
What flights does A4B158 operate?
Mode-S A4B158 has broadcast 1 distinct callsign, including N401LF.