Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

ADAF8D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N981HC · operated by IHC HEALTH SERVICES INC

Hex
ADAF8D
Octal
53327615
Decimal
11,382,669
Country
US
Tail
N981HC
Type
BE20
No current signal · last broadcast 22h ago
Flights observed
38
Distinct callsigns
2
Country
US
Last broadcast
22h ago

Last known position

Most recent position reported by Mode-S ADAF8D.

Country allocation

The ICAO 24-bit address ADAF8D 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
LN981HC - 21 2026-07-10
N981HC - 17 2026-07-13

Recent flights last 38

DateFlightRouteTakeoffLandingDuration
2026-07-13 N981HC - Jul 13, 10:25 UTCJul 13, 11:00 UTC35m
2026-07-13 N981HC - Jul 13, 07:45 UTCJul 13, 08:15 UTC30m
2026-07-12 N981HC - Jul 12, 21:35 UTCJul 12, 22:10 UTC35m
2026-07-12 N981HC - Jul 12, 20:15 UTCJul 12, 20:50 UTC35m
2026-07-12 N981HC - Jul 12, 16:05 UTCJul 12, 16:45 UTC40m
2026-07-12 N981HC - Jul 12, 14:25 UTCJul 12, 14:55 UTC30m
2026-07-12 N981HC - Jul 12, 13:05 UTCJul 12, 13:40 UTC35m
2026-07-12 N981HC - Jul 12, 10:30 UTCJul 12, 11:05 UTC35m
2026-07-11 N981HC SLC → SLC Jul 11, 16:25 UTCJul 11, 17:00 UTC35m
2026-07-10 LN981HC SLC → SLC Jul 10, 06:00 UTCJul 10, 06:15 UTC15m
2026-07-10 LN981HC - Jul 10, 03:10 UTCJul 10, 03:40 UTC30m
2026-07-10 LN981HC - Jul 10, 02:20 UTCJul 10, 02:30 UTC10m
2026-07-09 LN981HC - Jul 9, 22:40 UTCJul 9, 23:10 UTC30m
2026-07-09 LN981HC - Jul 9, 15:20 UTCJul 9, 16:15 UTC55m
2026-07-09 LN981HC - Jul 9, 13:25 UTCJul 9, 14:20 UTC55m
2026-07-08 LN981HC - Jul 8, 23:45 UTCJul 9, 00:20 UTC35m
2026-07-08 LN981HC - Jul 8, 21:05 UTCJul 8, 21:40 UTC35m
2026-07-08 LN981HC LAS → SLC Jul 8, 17:50 UTCJul 8, 19:10 UTC1h 20m
2026-07-08 LN981HC - Jul 8, 14:45 UTCJul 8, 16:10 UTC1h 25m
2026-07-07 LN981HC APA → SLC Jul 7, 19:35 UTCJul 7, 21:15 UTC1h 40m
2026-07-07 LN981HC - Jul 7, 16:20 UTCJul 7, 16:45 UTC25m
2026-07-07 LN981HC - Jul 7, 15:20 UTCJul 7, 15:35 UTC15m
2026-07-07 LN981HC - Jul 7, 10:10 UTCJul 7, 10:20 UTC10m
2026-07-07 LN981HC - Jul 7, 09:15 UTCJul 7, 09:35 UTC20m
2026-07-07 LN981HC - Jul 7, 06:50 UTCJul 7, 07:05 UTC15m
2026-07-07 LN981HC - Jul 7, 01:30 UTCJul 7, 02:15 UTC45m
2026-07-07 LN981HC - Jul 7, 00:25 UTCJul 7, 00:40 UTC15m
2026-07-06 LN981HC - Jul 6, 21:45 UTCJul 6, 22:20 UTC35m
2026-07-04 LN981HC - Jul 4, 20:20 UTCJul 4, 21:20 UTC1h 0m
2026-07-04 LN981HC - Jul 4, 18:05 UTCJul 4, 18:55 UTC50m
2026-07-03 N981HC - Jul 3, 04:40 UTCJul 3, 05:35 UTC55m
2026-07-02 N981HC SLC → CDC Jul 2, 21:35 UTCJul 2, 22:25 UTC50m
2026-06-29 N981HC SLC → SLC Jun 29, 21:19 UTCJun 29, 21:44 UTC25m
2026-06-16 N981HC - Jun 16, 00:45 UTCJun 16, 01:04 UTC20m
2026-06-15 N981HC - Jun 15, 22:30 UTCJun 15, 23:25 UTC55m
2026-06-15 N981HC - Jun 15, 21:09 UTCJun 15, 21:30 UTC20m
2026-04-18 N981HC - Apr 18, 21:55 UTCApr 19, 00:00 UTC2h 5m
2026-04-18 N981HC - Apr 18, 18:45 UTCApr 18, 20:25 UTC1h 40m

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 N981HC page for operator, model, and routing details .

Mode-S ADAF8D frequently asked

What is Mode-S code ADAF8D?
ADAF8D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N981HC.
Where is Mode-S ADAF8D registered?
Mode-S code ADAF8D 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 ADAF8D broadcasting right now?
No active broadcast right now. Last signal was 22h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ADAF8D, octal 53327615, decimal 11,382,669.
What flights does ADAF8D operate?
Mode-S ADAF8D has broadcast 2 distinct callsigns, including LN981HC, N981HC.