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sensors Mode-S transponder

ADD412

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N990QS · CESSNA 680 Citation Latitude · operated by NETJETS SALES INC

Hex
ADD412
Octal
53352022
Decimal
11,392,018
Country
US
Tail
N990QS
Type
C68A
Broadcasting now · callsign EJA990 · 22,200 ft
Flights observed
228
Distinct callsigns
2
Country
US
Last broadcast
Jul 19, 20:20 UTC

Current position

ADD412 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address ADD412 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
EJA990 - 215 2026-07-19
N990QS - 13 2026-07-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-19 N990QS - Jul 19, 19:45 UTCJul 19, 20:20 UTC35m
2026-07-19 EJA990 - Jul 19, 16:10 UTCJul 19, 18:25 UTC2h 15m
2026-07-19 EJA990 - Jul 19, 01:20 UTCJul 19, 04:15 UTC2h 55m
2026-07-18 EJA990 - Jul 18, 16:30 UTCJul 18, 19:25 UTC2h 55m
2026-07-18 EJA990 - Jul 18, 14:05 UTCJul 18, 14:55 UTC50m
2026-07-16 EJA990 LGU → CMH Jul 16, 19:25 UTCJul 17, 01:00 UTC5h 35m
2026-07-16 EJA990 COE → LGU Jul 16, 16:05 UTCJul 16, 17:25 UTC1h 20m
2026-07-16 EJA990 - Jul 16, 01:50 UTCJul 16, 04:00 UTC2h 10m
2026-07-15 EJA990 - Jul 15, 22:55 UTCJul 16, 00:40 UTC1h 45m
2026-07-15 EJA990 SBA → LVK Jul 15, 21:15 UTCJul 15, 21:55 UTC40m
2026-07-15 EJA990 SJC → SBA Jul 15, 18:55 UTCJul 15, 19:40 UTC45m
2026-07-15 EJA990 - Jul 15, 00:25 UTCJul 15, 04:05 UTC3h 40m
2026-07-14 EJA990 - Jul 14, 22:40 UTCJul 14, 23:55 UTC1h 14m
2026-07-14 EJA990 - Jul 14, 21:05 UTCJul 14, 21:55 UTC50m
2026-07-14 EJA990 TEB → MDW Jul 14, 16:35 UTCJul 14, 18:10 UTC1h 35m
2026-07-14 EJA990 - Jul 14, 12:45 UTCJul 14, 13:35 UTC50m
2026-07-14 EJA990 - Jul 14, 01:55 UTCJul 14, 02:20 UTC25m
2026-07-14 EJA990 - Jul 14, 01:00 UTCJul 14, 01:20 UTC20m
2026-07-13 EJA990 - Jul 13, 22:50 UTCJul 13, 23:25 UTC35m
2026-07-13 EJA990 - Jul 13, 19:50 UTCJul 13, 20:45 UTC55m
2026-07-13 EJA990 - Jul 13, 17:25 UTCJul 13, 18:35 UTC1h 10m
2026-07-13 EJA990 MSP → YIP Jul 13, 14:55 UTCJul 13, 16:10 UTC1h 15m
2026-07-13 EJA990 - Jul 13, 12:35 UTCJul 13, 13:30 UTC55m
2026-07-13 EJA990 - Jul 13, 00:20 UTCJul 13, 00:45 UTC25m
2026-07-12 EJA990 IAD → ORD Jul 12, 21:10 UTCJul 12, 22:45 UTC1h 35m
2026-07-12 EJA990 - Jul 12, 16:01 UTCJul 12, 17:45 UTC1h 45m
2026-07-11 EJA990 - Jul 11, 17:40 UTCJul 11, 18:45 UTC1h 5m
2026-07-11 EJA990 - Jul 11, 14:40 UTCJul 11, 15:20 UTC40m
2026-07-10 EJA990 - Jul 10, 20:20 UTCJul 10, 22:55 UTC2h 35m
2026-07-10 EJA990 LNA → MCO Jul 10, 18:45 UTCJul 10, 19:25 UTC40m
2026-07-10 EJA990 - Jul 10, 15:55 UTCJul 10, 17:20 UTC1h 25m
2026-07-10 EJA990 - Jul 10, 12:35 UTCJul 10, 14:10 UTC1h 35m
2026-07-09 EJA990 - Jul 9, 20:15 UTCJul 9, 21:10 UTC55m
2026-07-09 EJA990 - Jul 9, 17:25 UTCJul 9, 19:35 UTC2h 10m
2026-07-09 EJA990 - Jul 9, 15:10 UTCJul 9, 15:45 UTC35m
2026-07-09 EJA990 - Jul 9, 13:05 UTCJul 9, 13:45 UTC40m
2026-07-08 EJA990 - Jul 8, 23:10 UTCJul 8, 23:55 UTC45m
2026-07-08 EJA990 - Jul 8, 20:25 UTCJul 8, 21:35 UTC1h 10m
2026-07-08 EJA990 - Jul 8, 17:35 UTCJul 8, 18:15 UTC40m
2026-07-08 EJA990 - Jul 8, 14:05 UTCJul 8, 15:25 UTC1h 20m
2026-07-08 EJA990 - Jul 8, 00:25 UTCJul 8, 00:55 UTC30m
2026-07-07 EJA990 - Jul 7, 21:00 UTCJul 7, 23:45 UTC2h 45m
2026-07-07 EJA990 - Jul 7, 18:40 UTCJul 7, 19:00 UTC20m
2026-07-07 EJA990 TEB → FOK Jul 7, 15:30 UTCJul 7, 16:05 UTC35m
2026-07-06 EJA990 - Jul 6, 22:40 UTCJul 7, 05:40 UTC7h 0m
2026-07-05 EJA990 - Jul 5, 22:45 UTCJul 6, 02:10 UTC3h 25m
2026-07-05 EJA990 - Jul 5, 19:20 UTCJul 5, 20:10 UTC50m
2026-07-04 EJA990 - Jul 4, 15:30 UTCJul 4, 16:15 UTC45m
2026-06-30 EJA990 - Jun 30, 20:10 UTCJun 30, 20:40 UTC30m
2026-06-30 EJA990 - Jun 30, 18:45 UTCJun 30, 18:55 UTC10m

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 N990QS page for operator, model, and routing details .

Mode-S ADD412 frequently asked

What is Mode-S code ADD412?
ADD412 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N990QS.
Where is Mode-S ADD412 registered?
Mode-S code ADD412 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 ADD412 broadcasting right now?
Yes. Mode-S ADD412 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ADD412, octal 53352022, decimal 11,392,018.
What flights does ADD412 operate?
Mode-S ADD412 has broadcast 2 distinct callsigns, including EJA990, N990QS.