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sensors Mode-S transponder

A09CC0

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N139BG · Motorglider · operated by PHILADELPHIA GLIDER COUNCIL INC

Hex
A09CC0
Octal
50116300
Decimal
10,525,888
Country
US
Tail
N139BG
Type
GLIM
No current signal · last broadcast 18d ago
Flights observed
99
Distinct callsigns
1
Country
US
Last broadcast
18d ago

Last known position

Most recent position reported by Mode-S A09CC0.

Country allocation

The ICAO 24-bit address A09CC0 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
N139BG - 99 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N139BG - Jul 26, 18:40 UTCJul 26, 20:05 UTC1h 25m
2026-07-26 N139BG - Jul 26, 16:00 UTCJul 26, 17:55 UTC1h 55m
2026-07-25 N139BG - Jul 25, 20:35 UTCJul 25, 21:00 UTC25m
2026-07-25 N139BG - Jul 25, 18:30 UTCJul 25, 19:40 UTC1h 10m
2026-07-25 N139BG - Jul 25, 17:20 UTCJul 25, 17:40 UTC20m
2026-07-22 N139BG - Jul 22, 19:55 UTCJul 22, 20:05 UTC10m
2026-07-22 N139BG - Jul 22, 17:15 UTCJul 22, 17:45 UTC30m
2026-07-19 N139BG - Jul 19, 14:30 UTCJul 19, 18:05 UTC3h 35m
2026-07-19 N139BG - Jul 19, 14:00 UTCJul 19, 14:15 UTC15m
2026-07-15 N139BG - Jul 15, 17:45 UTCJul 15, 17:55 UTC10m
2026-07-15 N139BG - Jul 15, 16:50 UTCJul 15, 17:10 UTC20m
2026-07-15 N139BG - Jul 15, 15:00 UTCJul 15, 16:00 UTC1h 0m
2026-07-15 N139BG - Jul 15, 13:55 UTCJul 15, 14:10 UTC15m
2026-07-14 N139BG - Jul 14, 20:00 UTCJul 14, 20:25 UTC25m
2026-07-14 N139BG - Jul 14, 17:35 UTCJul 14, 17:45 UTC10m
2026-07-14 N139BG - Jul 14, 16:30 UTCJul 14, 16:40 UTC10m
2026-07-13 N139BG - Jul 13, 19:25 UTCJul 13, 20:15 UTC50m
2026-07-13 N139BG - Jul 13, 18:05 UTCJul 13, 18:20 UTC15m
2026-07-13 N139BG - Jul 13, 17:05 UTCJul 13, 17:25 UTC20m
2026-07-13 N139BG - Jul 13, 16:10 UTCJul 13, 16:25 UTC15m
2026-07-13 N139BG - Jul 13, 14:20 UTCJul 13, 15:20 UTC1h 0m
2026-07-12 N139BG - Jul 12, 22:20 UTCJul 12, 23:05 UTC45m
2026-07-12 N139BG - Jul 12, 21:20 UTCJul 12, 21:40 UTC20m
2026-07-12 N139BG - Jul 12, 20:15 UTCJul 12, 21:05 UTC50m
2026-07-12 N139BG - Jul 12, 19:05 UTCJul 12, 19:35 UTC30m
2026-07-12 N139BG - Jul 12, 17:40 UTCJul 12, 18:01 UTC20m
2026-07-12 N139BG - Jul 12, 15:40 UTCJul 12, 16:50 UTC1h 10m
2026-07-12 N139BG - Jul 12, 13:40 UTCJul 12, 15:05 UTC1h 25m
2026-07-08 N139BG - Jul 8, 17:35 UTCJul 8, 20:00 UTC2h 25m
2026-07-08 N139BG - Jul 8, 16:55 UTCJul 8, 17:20 UTC25m
2026-07-05 N139BG - Jul 5, 17:40 UTCJul 5, 18:55 UTC1h 15m
2026-07-04 N139BG - Jul 4, 15:30 UTCJul 4, 17:35 UTC2h 5m
2026-07-04 N139BG - Jul 4, 13:30 UTCJul 4, 14:50 UTC1h 20m
2026-07-03 N139BG - Jul 3, 15:45 UTCJul 3, 18:10 UTC2h 25m
2026-07-03 N139BG - Jul 3, 13:40 UTCJul 3, 14:00 UTC20m
2026-07-01 N139BG - Jul 1, 19:00 UTCJul 1, 19:40 UTC40m
2026-07-01 N139BG - Jul 1, 17:50 UTCJul 1, 18:15 UTC25m
2026-06-24 N139BG - Jun 24, 18:44 UTCJun 24, 19:59 UTC1h 15m
2026-06-21 N139BG - Jun 21, 18:10 UTCJun 21, 21:05 UTC2h 55m
2026-06-21 N139BG - Jun 21, 17:10 UTCJun 21, 17:24 UTC15m
2026-06-21 N139BG - Jun 21, 16:14 UTCJun 21, 16:30 UTC15m
2026-06-21 N139BG - Jun 21, 13:34 UTCJun 21, 15:25 UTC1h 50m
2026-06-20 N139BG - Jun 20, 16:59 UTCJun 20, 17:19 UTC20m
2026-06-20 N139BG - Jun 20, 13:24 UTCJun 20, 16:05 UTC2h 40m
2026-06-17 N139BG - Jun 17, 19:55 UTCJun 17, 22:00 UTC2h 5m
2026-06-17 N139BG - Jun 17, 18:35 UTCJun 17, 18:56 UTC20m
2026-06-17 N139BG - Jun 17, 17:40 UTCJun 17, 18:00 UTC20m
2026-06-14 N139BG - Jun 14, 17:10 UTCJun 14, 19:15 UTC2h 5m
2026-06-14 N139BG - Jun 14, 15:55 UTCJun 14, 16:15 UTC20m
2026-06-14 N139BG - Jun 14, 13:50 UTCJun 14, 15:20 UTC1h 30m

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 N139BG page for operator, model, and routing details .

Mode-S A09CC0 frequently asked

What is Mode-S code A09CC0?
A09CC0 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N139BG.
Where is Mode-S A09CC0 registered?
Mode-S code A09CC0 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 A09CC0 broadcasting right now?
No active broadcast right now. Last signal was 18d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A09CC0, octal 50116300, decimal 10,525,888.
What flights does A09CC0 operate?
Mode-S A09CC0 has broadcast 1 distinct callsign, including N139BG.