Apparatus

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sensors Mode-S transponder

A8B84C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N661DS · DIAMOND DA-40 Club Star · operated by G & R HOLDINGS LLC

Hex
A8B84C
Octal
52134114
Decimal
11,057,228
Country
US
Tail
N661DS
Type
DA40
Broadcasting now · callsign N661DS · 1,125 ft
Flights observed
122
Distinct callsigns
1
Country
US
Last broadcast
21h ago

Current position

A8B84C is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A8B84C 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
N661DS - 122 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 N661DS - Jul 13, 20:10 UTCJul 13, 20:20 UTC10m
2026-07-13 N661DS - Jul 13, 16:00 UTCJul 13, 16:15 UTC15m
2026-07-12 N661DS EMT → EMT Jul 12, 22:25 UTCJul 12, 23:45 UTC1h 20m
2026-07-12 N661DS - Jul 12, 16:30 UTCJul 12, 17:40 UTC1h 10m
2026-07-11 N661DS - Jul 11, 22:50 UTCJul 11, 23:20 UTC30m
2026-07-11 N661DS EMT → AVX Jul 11, 20:45 UTCJul 11, 21:40 UTC55m
2026-07-11 N661DS EMT → EMT Jul 11, 17:45 UTCJul 11, 18:40 UTC55m
2026-07-10 N661DS - Jul 10, 21:55 UTCJul 10, 23:00 UTC1h 5m
2026-07-08 N661DS EMT → EMT Jul 8, 23:10 UTCJul 8, 23:45 UTC35m
2026-07-08 N661DS EMT → EMT Jul 8, 19:10 UTCJul 8, 20:00 UTC50m
2026-07-08 N661DS - Jul 8, 02:55 UTCJul 8, 04:15 UTC1h 20m
2026-07-07 N661DS - Jul 7, 22:05 UTCJul 7, 23:20 UTC1h 15m
2026-07-06 N661DS EMT → EMT Jul 6, 18:30 UTCJul 6, 19:05 UTC35m
2026-07-05 N661DS - Jul 5, 22:10 UTCJul 5, 22:45 UTC35m
2026-07-03 N661DS - Jul 3, 03:25 UTCJul 3, 03:55 UTC30m
2026-06-30 N661DS - Jun 30, 16:30 UTCJun 30, 17:20 UTC50m
2026-06-30 N661DS EMT → EMT Jun 30, 02:20 UTCJun 30, 03:50 UTC1h 30m
2026-06-29 N661DS EMT → EMT Jun 29, 01:55 UTCJun 29, 02:45 UTC50m
2026-06-26 N661DS - Jun 26, 18:39 UTCJun 26, 19:00 UTC20m
2026-06-24 N661DS EMT → EMT Jun 24, 20:20 UTCJun 24, 20:49 UTC30m
2026-06-23 N661DS - Jun 23, 22:49 UTCJun 23, 23:55 UTC1h 5m
2026-06-23 N661DS EMT → EMT Jun 23, 04:09 UTCJun 23, 04:25 UTC15m
2026-06-22 N661DS - Jun 22, 20:04 UTCJun 22, 20:49 UTC45m
2026-06-22 N661DS EMT → CCB Jun 22, 19:05 UTCJun 22, 19:24 UTC20m
2026-06-21 N661DS EMT → EMT Jun 21, 18:35 UTCJun 21, 19:34 UTC1h 0m
2026-06-20 N661DS EMT → EMT Jun 20, 18:59 UTCJun 20, 19:09 UTC10m
2026-06-20 N661DS - Jun 20, 16:49 UTCJun 20, 17:44 UTC55m
2026-06-19 N661DS - Jun 19, 23:59 UTCJun 20, 00:49 UTC50m
2026-06-17 N661DS EMT → EMT Jun 17, 04:15 UTCJun 17, 04:55 UTC40m
2026-06-16 N661DS EMT → EMT Jun 16, 23:00 UTCJun 17, 00:15 UTC1h 15m
2026-06-16 N661DS - Jun 16, 19:30 UTCJun 16, 20:30 UTC1h 1m
2026-06-15 N661DS EMT → EMT Jun 15, 17:59 UTCJun 15, 18:50 UTC50m
2026-06-13 N661DS EMT → EMT Jun 13, 16:55 UTCJun 13, 17:55 UTC1h 0m
2026-06-12 N661DS EMT → EMT Jun 12, 19:35 UTCJun 12, 20:40 UTC1h 5m
2026-06-12 N661DS EMT → EMT Jun 12, 17:30 UTCJun 12, 18:45 UTC1h 15m
2026-06-10 N661DS - Jun 10, 21:40 UTCJun 10, 22:30 UTC50m
2026-06-10 N661DS RBK → EMT Jun 10, 19:50 UTCJun 10, 20:40 UTC50m
2026-06-10 N661DS - Jun 10, 17:55 UTCJun 10, 18:55 UTC1h 0m
2026-06-09 N661DS - Jun 9, 18:45 UTCJun 9, 19:25 UTC40m
2026-06-09 N661DS EMT → EMT Jun 9, 16:50 UTCJun 9, 17:30 UTC40m
2026-06-07 N661DS - Jun 7, 17:20 UTCJun 7, 18:15 UTC55m
2026-06-06 N661DS - Jun 6, 18:00 UTCJun 6, 18:25 UTC25m
2026-06-05 N661DS - Jun 5, 19:50 UTCJun 5, 20:40 UTC50m
2026-06-04 N661DS - Jun 4, 22:05 UTCJun 4, 22:50 UTC45m
2026-06-04 N661DS - Jun 4, 19:05 UTCJun 4, 20:10 UTC1h 5m
2026-06-03 N661DS EMT → EMT Jun 3, 21:40 UTCJun 3, 22:50 UTC1h 10m
2026-06-02 N661DS - Jun 2, 18:35 UTCJun 2, 20:00 UTC1h 25m
2026-06-01 N661DS EMT → EMT Jun 1, 21:15 UTCJun 1, 22:05 UTC50m
2026-05-30 N661DS - May 30, 18:10 UTCMay 30, 18:50 UTC40m
2026-05-30 N661DS EMT → EMT May 30, 16:15 UTCMay 30, 16:50 UTC35m

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 N661DS page for operator, model, and routing details .

Mode-S A8B84C frequently asked

What is Mode-S code A8B84C?
A8B84C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N661DS.
Where is Mode-S A8B84C registered?
Mode-S code A8B84C 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 A8B84C broadcasting right now?
Yes. Mode-S A8B84C is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8B84C, octal 52134114, decimal 11,057,228.
What flights does A8B84C operate?
Mode-S A8B84C has broadcast 1 distinct callsign, including N661DS.