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sensors Mode-S transponder

ADD2A6

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N990AC · operated by AARON GOOD

Hex
ADD2A6
Octal
53351246
Decimal
11,391,654
Country
US
Tail
N990AC
Broadcasting now · callsign TKR186 · 5,425 ft
Flights observed
45
Distinct callsigns
2
Country
US
Last broadcast
1h ago

Current position

ADD2A6 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address ADD2A6 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
TKR186 - 44 2026-07-18
N990AC - 1 2026-06-01

Recent flights last 45

DateFlightRouteTakeoffLandingDuration
2026-07-18 TKR186 - Jul 18, 20:55 UTCJul 18, 21:30 UTC35m
2026-07-18 TKR186 COE → COE Jul 18, 19:45 UTCJul 18, 20:25 UTC40m
2026-07-18 TKR186 - Jul 18, 18:25 UTCJul 18, 19:05 UTC40m
2026-07-18 TKR186 - Jul 18, 01:54 UTCJul 18, 02:25 UTC30m
2026-07-18 TKR186 - Jul 18, 00:39 UTCJul 18, 01:15 UTC35m
2026-07-17 TKR186 - Jul 17, 22:49 UTCJul 18, 00:04 UTC1h 15m
2026-07-17 TKR186 - Jul 17, 19:35 UTCJul 17, 22:05 UTC2h 30m
2026-07-17 TKR186 - Jul 17, 02:45 UTCJul 17, 04:35 UTC1h 50m
2026-07-17 TKR186 - Jul 17, 01:45 UTCJul 17, 02:15 UTC30m
2026-07-16 TKR186 - Jul 16, 22:55 UTCJul 17, 01:09 UTC2h 15m
2026-07-16 TKR186 - Jul 16, 21:50 UTCJul 16, 22:15 UTC25m
2026-07-16 TKR186 - Jul 16, 20:49 UTCJul 16, 21:15 UTC25m
2026-07-16 TKR186 - Jul 16, 19:25 UTCJul 16, 19:55 UTC30m
2026-07-10 TKR186 - Jul 10, 02:35 UTCJul 10, 04:20 UTC1h 45m
2026-07-10 TKR186 - Jul 10, 01:25 UTCJul 10, 02:05 UTC40m
2026-07-09 TKR186 - Jul 9, 23:05 UTCJul 10, 00:50 UTC1h 45m
2026-07-05 TKR186 - Jul 5, 21:05 UTCJul 5, 21:35 UTC30m
2026-07-03 TKR186 - Jul 3, 22:10 UTCJul 3, 23:05 UTC55m
2026-06-30 TKR186 - Jun 30, 02:25 UTCJun 30, 03:00 UTC35m
2026-06-29 TKR186 - Jun 29, 23:09 UTCJun 30, 01:40 UTC2h 31m
2026-06-29 TKR186 - Jun 29, 21:44 UTCJun 29, 22:15 UTC30m
2026-06-29 TKR186 - Jun 29, 20:40 UTCJun 29, 21:09 UTC30m
2026-06-29 TKR186 - Jun 29, 19:29 UTCJun 29, 20:04 UTC35m
2026-06-29 TKR186 - Jun 29, 01:00 UTCJun 29, 03:25 UTC2h 25m
2026-06-28 TKR186 - Jun 28, 22:24 UTCJun 29, 00:20 UTC1h 55m
2026-06-17 TKR186 - Jun 17, 01:45 UTCJun 17, 02:50 UTC1h 5m
2026-06-16 TKR186 - Jun 16, 23:55 UTCJun 17, 00:30 UTC35m
2026-06-16 TKR186 - Jun 16, 22:35 UTCJun 16, 23:20 UTC45m
2026-06-16 TKR186 - Jun 16, 03:10 UTCJun 16, 03:39 UTC30m
2026-06-16 TKR186 - Jun 16, 01:15 UTCJun 16, 01:35 UTC20m
2026-06-15 TKR186 - Jun 15, 23:54 UTCJun 16, 00:24 UTC30m
2026-06-15 TKR186 - Jun 15, 22:40 UTCJun 15, 23:19 UTC40m
2026-06-15 TKR186 - Jun 15, 19:30 UTCJun 15, 19:39 UTC10m
2026-06-15 TKR186 - Jun 15, 02:20 UTCJun 15, 02:39 UTC20m
2026-06-15 TKR186 - Jun 15, 01:25 UTCJun 15, 01:45 UTC20m
2026-06-15 TKR186 - Jun 15, 00:15 UTCJun 15, 00:35 UTC20m
2026-06-14 TKR186 - Jun 14, 23:25 UTCJun 14, 23:39 UTC15m
2026-06-14 TKR186 - Jun 14, 22:25 UTCJun 14, 22:45 UTC20m
2026-06-14 TKR186 - Jun 14, 20:45 UTCJun 14, 21:20 UTC35m
2026-06-14 TKR186 - Jun 14, 19:40 UTCJun 14, 20:05 UTC25m
2026-06-14 TKR186 - Jun 14, 18:30 UTCJun 14, 19:00 UTC30m
2026-06-01 N990AC - Jun 1, 16:10 UTCJun 1, 16:25 UTC15m
2026-05-27 TKR186 - May 27, 21:30 UTCMay 27, 23:20 UTC1h 50m
2026-05-27 TKR186 - May 27, 19:40 UTCMay 27, 20:05 UTC25m
2026-05-27 TKR186 - May 27, 18:35 UTCMay 27, 19:00 UTC25m

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 N990AC page for operator, model, and routing details .

Mode-S ADD2A6 frequently asked

What is Mode-S code ADD2A6?
ADD2A6 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N990AC.
Where is Mode-S ADD2A6 registered?
Mode-S code ADD2A6 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 ADD2A6 broadcasting right now?
Yes. Mode-S ADD2A6 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ADD2A6, octal 53351246, decimal 11,391,654.
What flights does ADD2A6 operate?
Mode-S ADD2A6 has broadcast 2 distinct callsigns, including TKR186, N990AC.