Apparatus

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sensors Mode-S transponder

ADD5F8

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N9907H · CESSNA R182 Skylane RG · operated by MATHER AVIATION LLC

Hex
ADD5F8
Octal
53352770
Decimal
11,392,504
Country
US
Tail
N9907H
Type
C82R
No current signal · last broadcast 16h ago
Flights observed
39
Distinct callsigns
1
Country
US
Last broadcast
16h ago

Last known position

Most recent position reported by Mode-S ADD5F8.

Country allocation

The ICAO 24-bit address ADD5F8 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
N9907H - 39 2026-07-21

Recent flights last 39

DateFlightRouteTakeoffLandingDuration
2026-07-21 N9907H - Jul 21, 15:35 UTCJul 21, 16:00 UTC25m
2026-07-21 N9907H MHR → MOD Jul 21, 14:25 UTCJul 21, 14:55 UTC30m
2026-07-20 N9907H - Jul 20, 18:00 UTCJul 20, 18:45 UTC45m
2026-07-20 N9907H - Jul 20, 15:45 UTCJul 20, 16:50 UTC1h 5m
2026-07-16 N9907H - Jul 16, 13:20 UTCJul 16, 14:35 UTC1h 15m
2026-07-15 N9907H - Jul 15, 18:10 UTCJul 15, 18:45 UTC35m
2026-07-15 N9907H - Jul 15, 15:55 UTCJul 15, 16:30 UTC35m
2026-07-13 N9907H SQL → MHR Jul 13, 17:45 UTCJul 13, 18:30 UTC45m
2026-07-13 N9907H MHR → SQL Jul 13, 17:00 UTCJul 13, 17:40 UTC40m
2026-07-09 N9907H - Jul 9, 19:20 UTCJul 9, 20:10 UTC50m
2026-07-09 N9907H - Jul 9, 13:55 UTCJul 9, 14:55 UTC1h 0m
2026-06-22 N9907H MHR → MHR Jun 22, 15:20 UTCJun 22, 16:50 UTC1h 30m
2026-06-19 N9907H MHR → MHR Jun 19, 18:39 UTCJun 19, 20:14 UTC1h 35m
2026-06-19 N9907H MHR → MHR Jun 19, 15:09 UTCJun 19, 16:25 UTC1h 15m
2026-06-18 N9907H - Jun 18, 21:15 UTCJun 18, 22:05 UTC50m
2026-06-18 N9907H - Jun 18, 15:00 UTCJun 18, 16:00 UTC1h 0m
2026-06-17 N9907H CCR → MHR Jun 17, 19:05 UTCJun 17, 19:35 UTC30m
2026-06-17 N9907H MHR → CCR Jun 17, 18:15 UTCJun 17, 18:45 UTC30m
2026-06-16 N9907H - Jun 16, 19:35 UTCJun 16, 20:55 UTC1h 21m
2026-06-16 N9907H - Jun 16, 16:45 UTCJun 16, 17:15 UTC30m
2026-06-16 N9907H MHR → CCR Jun 16, 16:05 UTCJun 16, 16:39 UTC35m
2026-06-15 N9907H - Jun 15, 17:34 UTCJun 15, 18:50 UTC1h 15m
2026-06-12 N9907H MHR → MHR Jun 12, 21:30 UTCJun 12, 22:55 UTC1h 25m
2026-06-12 N9907H - Jun 12, 15:55 UTCJun 12, 17:40 UTC1h 45m
2026-06-12 N9907H MHR → BFL Jun 12, 13:40 UTCJun 12, 15:25 UTC1h 45m
2026-06-05 N9907H - Jun 5, 17:45 UTCJun 5, 18:15 UTC30m
2026-06-05 N9907H - Jun 5, 15:15 UTCJun 5, 16:35 UTC1h 20m
2026-06-04 N9907H MHR → MHR Jun 4, 20:15 UTCJun 4, 22:05 UTC1h 50m
2026-06-04 N9907H CCR → MHR Jun 4, 16:55 UTCJun 4, 17:30 UTC35m
2026-06-04 N9907H - Jun 4, 16:25 UTCJun 4, 16:50 UTC25m
2026-05-29 N9907H - May 29, 17:45 UTCMay 29, 18:10 UTC25m
2026-05-29 N9907H MHR → CCR May 29, 17:05 UTCMay 29, 17:35 UTC30m
2026-05-22 N9907H - May 22, 21:05 UTCMay 22, 21:30 UTC25m
2026-05-22 N9907H MHR → CCR May 22, 20:10 UTCMay 22, 21:00 UTC50m
2026-05-22 N9907H - May 22, 15:45 UTCMay 22, 16:35 UTC50m
2026-05-22 N9907H - May 22, 14:05 UTCMay 22, 15:00 UTC55m
2026-04-28 N9907H MHR → MHR Apr 28, 14:25 UTCApr 28, 15:55 UTC1h 30m
2026-04-15 N9907H - Apr 15, 19:05 UTCApr 15, 19:30 UTC25m
2026-04-15 N9907H - Apr 15, 18:10 UTCApr 15, 19:00 UTC50m

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 N9907H page for operator, model, and routing details .

Mode-S ADD5F8 frequently asked

What is Mode-S code ADD5F8?
ADD5F8 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N9907H.
Where is Mode-S ADD5F8 registered?
Mode-S code ADD5F8 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 ADD5F8 broadcasting right now?
No active broadcast right now. Last signal was 16h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ADD5F8, octal 53352770, decimal 11,392,504.
What flights does ADD5F8 operate?
Mode-S ADD5F8 has broadcast 1 distinct callsign, including N9907H.