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sensors Mode-S transponder

AD48A9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N955QS · CESSNA 680 Citation Sovereign · operated by 7RX LLC, SMITH ANDREA B, SMITH SEAN CRANE, SINGER ANDREW SCOTT, LANE FLINT, HAG AVIATION LLC

Hex
AD48A9
Octal
53244251
Decimal
11,356,329
Country
US
Tail
N955QS
Type
C680
No current signal · last broadcast 10h ago
Flights observed
278
Distinct callsigns
2
Country
US
Last broadcast
10h ago

Last known position

Most recent position reported by Mode-S AD48A9.

Country allocation

The ICAO 24-bit address AD48A9 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 2 distinct

Callsign Airline Flights Last seen
EJA955 - 268 2026-07-13
N955QS - 10 2026-07-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 EJA955 - Jul 13, 20:40 UTCJul 13, 21:20 UTC40m
2026-07-13 EJA955 - Jul 13, 18:30 UTCJul 13, 20:00 UTC1h 30m
2026-07-13 EJA955 - Jul 13, 16:45 UTCJul 13, 17:05 UTC20m
2026-07-13 EJA955 - Jul 13, 13:55 UTCJul 13, 15:55 UTC2h 0m
2026-07-13 EJA955 - Jul 13, 11:55 UTCJul 13, 13:10 UTC1h 15m
2026-07-12 EJA955 - Jul 12, 19:45 UTCJul 12, 22:05 UTC2h 20m
2026-07-12 EJA955 - Jul 12, 17:20 UTCJul 12, 19:05 UTC1h 45m
2026-07-12 EJA955 MWC → MDW Jul 12, 13:35 UTCJul 12, 15:15 UTC1h 40m
2026-07-12 EJA955 - Jul 12, 11:55 UTCJul 12, 12:15 UTC20m
2026-07-11 EJA955 - Jul 11, 21:05 UTCJul 11, 22:10 UTC1h 5m
2026-07-11 EJA955 - Jul 11, 16:55 UTCJul 11, 19:55 UTC3h 0m
2026-07-11 EJA955 - Jul 11, 14:40 UTCJul 11, 15:45 UTC1h 5m
2026-07-10 EJA955 - Jul 10, 18:05 UTCJul 10, 18:50 UTC45m
2026-07-10 EJA955 - Jul 10, 16:40 UTCJul 10, 17:20 UTC40m
2026-07-10 EJA955 - Jul 10, 11:00 UTCJul 10, 15:45 UTC4h 45m
2026-07-10 EJA955 - Jul 10, 02:30 UTCJul 10, 03:40 UTC1h 10m
2026-07-10 EJA955 - Jul 10, 01:30 UTCJul 10, 02:05 UTC35m
2026-07-09 EJA955 - Jul 9, 23:50 UTCJul 10, 00:35 UTC45m
2026-07-09 EJA955 - Jul 9, 20:55 UTCJul 9, 22:00 UTC1h 5m
2026-07-09 EJA955 - Jul 9, 19:30 UTCJul 9, 20:00 UTC30m
2026-07-07 EJA955 - Jul 7, 14:05 UTCJul 7, 15:05 UTC1h 0m
2026-07-07 EJA955 - Jul 7, 12:20 UTCJul 7, 12:55 UTC35m
2026-07-06 EJA955 - Jul 6, 20:10 UTCJul 6, 22:25 UTC2h 15m
2026-07-06 EJA955 - Jul 6, 17:15 UTCJul 6, 18:30 UTC1h 15m
2026-07-06 EJA955 - Jul 6, 13:00 UTCJul 6, 14:55 UTC1h 55m
2026-07-05 EJA955 - Jul 5, 21:35 UTCJul 5, 22:45 UTC1h 10m
2026-07-05 N955QS - Jul 5, 17:15 UTCJul 5, 18:55 UTC1h 40m
2026-07-04 N955QS - Jul 4, 19:15 UTCJul 5, 18:15 UTC23h 0m
2026-07-03 EJA955 TEB → HPN Jul 3, 20:00 UTCJul 3, 20:20 UTC20m
2026-07-03 EJA955 LEB → TEB Jul 3, 16:05 UTCJul 3, 16:50 UTC45m
2026-07-02 EJA955 - Jul 2, 18:55 UTCJul 2, 20:05 UTC1h 10m
2026-07-02 EJA955 - Jul 2, 16:10 UTCJul 2, 17:25 UTC1h 15m
2026-07-02 EJA955 - Jul 2, 13:15 UTCJul 2, 15:00 UTC1h 45m
2026-07-01 EJA955 - Jul 1, 22:00 UTCJul 1, 22:45 UTC45m
2026-07-01 EJA955 - Jul 1, 20:05 UTCJul 1, 20:50 UTC45m
2026-07-01 EJA955 - Jul 1, 18:10 UTCJul 1, 19:00 UTC50m
2026-07-01 EJA955 - Jul 1, 15:55 UTCJul 1, 16:55 UTC1h 0m
2026-07-01 EJA955 - Jul 1, 14:00 UTCJul 1, 14:15 UTC15m
2026-06-30 EJA955 - Jun 30, 22:50 UTCJun 30, 23:55 UTC1h 5m
2026-06-30 EJA955 - Jun 30, 21:00 UTCJun 30, 21:25 UTC25m
2026-06-30 EJA955 - Jun 30, 19:15 UTCJun 30, 19:40 UTC25m
2026-06-28 EJA955 - Jun 28, 21:14 UTCJun 28, 21:34 UTC20m
2026-06-28 EJA955 - Jun 28, 18:19 UTCJun 28, 20:04 UTC1h 45m
2026-06-28 EJA955 - Jun 28, 15:34 UTCJun 28, 16:14 UTC40m
2026-06-27 EJA955 - Jun 27, 19:49 UTCJun 27, 21:04 UTC1h 15m
2026-06-27 EJA955 - Jun 27, 16:24 UTCJun 27, 17:14 UTC50m
2026-06-27 EJA955 - Jun 27, 14:05 UTCJun 27, 15:24 UTC1h 20m
2026-06-27 EJA955 - Jun 27, 11:55 UTCJun 27, 12:55 UTC1h 0m
2026-06-26 EJA955 - Jun 26, 20:10 UTCJun 27, 00:29 UTC4h 20m
2026-06-26 EJA955 - Jun 26, 15:25 UTCJun 26, 19:30 UTC4h 5m

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 N955QS page for operator, model, and routing details .

Mode-S AD48A9 frequently asked

What is Mode-S code AD48A9?
AD48A9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N955QS.
Where is Mode-S AD48A9 registered?
Mode-S code AD48A9 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 AD48A9 broadcasting right now?
No active broadcast right now. Last signal was 10h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD48A9, octal 53244251, decimal 11,356,329.
What flights does AD48A9 operate?
Mode-S AD48A9 has broadcast 2 distinct callsigns, including EJA955, N955QS.