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sensors Mode-S transponder

AB7639

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N838BP · ROBINSON R-44 Raven · operated by SPITZER HELICOPTER LLC

Hex
AB7639
Octal
52673071
Decimal
11,236,921
Country
US
Tail
N838BP
Type
R44
No current signal · last broadcast 1d ago
Flights observed
101
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S AB7639.

Country allocation

The ICAO 24-bit address AB7639 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
N838BP - 101 2026-07-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-16 N838BP - Jul 16, 19:40 UTCJul 16, 21:15 UTC1h 35m
2026-07-15 N838BP - Jul 15, 22:20 UTCJul 15, 23:20 UTC1h 0m
2026-07-15 N838BP - Jul 15, 21:00 UTCJul 15, 21:20 UTC20m
2026-07-15 N838BP - Jul 15, 18:55 UTCJul 15, 19:50 UTC55m
2026-07-15 N838BP - Jul 15, 03:55 UTCJul 15, 05:50 UTC1h 55m
2026-07-14 N838BP - Jul 14, 23:15 UTCJul 15, 01:20 UTC2h 5m
2026-07-14 N838BP - Jul 14, 19:55 UTCJul 14, 20:40 UTC45m
2026-07-13 N838BP - Jul 13, 22:05 UTCJul 13, 23:30 UTC1h 25m
2026-07-12 N838BP - Jul 12, 20:30 UTCJul 12, 21:30 UTC1h 0m
2026-07-12 N838BP - Jul 12, 02:30 UTCJul 12, 03:10 UTC40m
2026-07-11 N838BP - Jul 11, 21:45 UTCJul 11, 22:40 UTC55m
2026-07-10 N838BP - Jul 10, 21:05 UTCJul 10, 22:05 UTC1h 0m
2026-07-10 N838BP - Jul 10, 19:45 UTCJul 10, 20:25 UTC40m
2026-07-10 N838BP - Jul 10, 02:05 UTCJul 10, 03:50 UTC1h 45m
2026-07-10 N838BP - Jul 10, 00:20 UTCJul 10, 01:25 UTC1h 5m
2026-07-09 N838BP - Jul 9, 20:55 UTCJul 9, 22:05 UTC1h 10m
2026-07-09 N838BP - Jul 9, 17:15 UTCJul 9, 17:50 UTC35m
2026-07-08 N838BP - Jul 8, 21:45 UTCJul 8, 23:15 UTC1h 30m
2026-07-07 N838BP - Jul 7, 21:10 UTCJul 7, 22:45 UTC1h 35m
2026-07-03 N838BP - Jul 3, 23:15 UTCJul 4, 00:40 UTC1h 25m
2026-07-03 N838BP - Jul 3, 00:35 UTCJul 3, 01:55 UTC1h 20m
2026-07-02 N838BP - Jul 2, 22:45 UTCJul 2, 23:40 UTC55m
2026-07-01 N838BP - Jul 1, 21:30 UTCJul 1, 21:40 UTC10m
2026-07-01 N838BP - Jul 1, 01:35 UTCJul 1, 03:45 UTC2h 10m
2026-06-30 N838BP - Jun 30, 18:50 UTCJun 30, 19:55 UTC1h 5m
2026-06-30 N838BP - Jun 30, 03:25 UTCJun 30, 04:30 UTC1h 5m
2026-06-27 N838BP - Jun 27, 22:45 UTCJun 28, 00:25 UTC1h 40m
2026-06-27 N838BP - Jun 27, 02:50 UTCJun 27, 04:05 UTC1h 15m
2026-06-26 N838BP - Jun 26, 02:44 UTCJun 26, 03:39 UTC55m
2026-06-24 N838BP - Jun 24, 23:34 UTCJun 25, 01:30 UTC1h 55m
2026-06-24 N838BP - Jun 24, 00:05 UTCJun 24, 01:34 UTC1h 30m
2026-06-22 N838BP - Jun 22, 21:05 UTCJun 22, 21:59 UTC55m
2026-06-20 N838BP - Jun 20, 23:59 UTCJun 21, 01:25 UTC1h 25m
2026-06-19 N838BP - Jun 19, 23:00 UTCJun 19, 23:14 UTC15m
2026-06-19 N838BP - Jun 19, 19:59 UTCJun 19, 20:34 UTC35m
2026-06-19 N838BP - Jun 19, 00:00 UTCJun 19, 01:24 UTC1h 24m
2026-06-18 N838BP - Jun 18, 21:10 UTCJun 18, 21:50 UTC40m
2026-06-16 N838BP - Jun 16, 23:10 UTCJun 17, 00:10 UTC1h 0m
2026-06-16 N838BP - Jun 16, 17:35 UTCJun 16, 17:49 UTC15m
2026-06-16 N838BP - Jun 16, 02:40 UTCJun 16, 03:35 UTC55m
2026-06-15 N838BP - Jun 15, 23:54 UTCJun 16, 00:24 UTC30m
2026-06-15 N838BP - Jun 15, 20:59 UTCJun 15, 22:35 UTC1h 35m
2026-06-14 N838BP - Jun 14, 22:30 UTCJun 14, 23:00 UTC30m
2026-06-14 N838BP - Jun 14, 00:05 UTCJun 14, 00:55 UTC50m
2026-06-13 N838BP - Jun 13, 20:00 UTCJun 13, 20:15 UTC15m
2026-06-13 N838BP - Jun 13, 18:00 UTCJun 13, 18:25 UTC25m
2026-06-13 N838BP EMT → BUR Jun 13, 04:00 UTCJun 13, 04:55 UTC55m
2026-06-13 N838BP - Jun 13, 02:00 UTCJun 13, 02:10 UTC10m
2026-06-12 N838BP - Jun 12, 23:25 UTCJun 13, 00:55 UTC1h 30m
2026-06-12 N838BP - Jun 12, 00:10 UTCJun 12, 01:55 UTC1h 46m

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 N838BP page for operator, model, and routing details .

Mode-S AB7639 frequently asked

What is Mode-S code AB7639?
AB7639 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N838BP.
Where is Mode-S AB7639 registered?
Mode-S code AB7639 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 AB7639 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB7639, octal 52673071, decimal 11,236,921.
What flights does AB7639 operate?
Mode-S AB7639 has broadcast 1 distinct callsign, including N838BP.