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sensors Mode-S transponder

A976DF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N709KA · DE HAVILLAND DHC-3 Otter · operated by KENMORE AIR HARBOR LLC

Hex
A976DF
Octal
52273337
Decimal
11,106,015
Country
US
Tail
N709KA
Type
DHC3
No current signal · last broadcast 4h ago
Flights observed
366
Distinct callsigns
1
Country
US
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S A976DF.

Country allocation

The ICAO 24-bit address A976DF 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
N709KA - 366 2026-06-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-28 N709KA - Jun 28, 22:29 UTCJun 28, 22:59 UTC30m
2026-06-28 N709KA - Jun 28, 20:54 UTCJun 28, 21:30 UTC35m
2026-06-28 N709KA - Jun 28, 19:59 UTCJun 28, 20:34 UTC35m
2026-06-28 N709KA - Jun 28, 18:49 UTCJun 28, 19:04 UTC15m
2026-06-28 N709KA - Jun 28, 17:30 UTCJun 28, 17:44 UTC15m
2026-06-28 N709KA KEH → YWH Jun 28, 16:05 UTCJun 28, 16:49 UTC45m
2026-06-26 N709KA KEH → KEH Jun 26, 23:39 UTCJun 26, 23:55 UTC15m
2026-06-24 N709KA - Jun 24, 23:40 UTCJun 24, 23:50 UTC10m
2026-06-24 N709KA - Jun 24, 22:45 UTCJun 24, 23:20 UTC35m
2026-06-24 N709KA - Jun 24, 21:29 UTCJun 24, 22:14 UTC45m
2026-06-24 N709KA - Jun 24, 19:04 UTCJun 24, 19:39 UTC35m
2026-06-24 N709KA - Jun 24, 18:05 UTCJun 24, 18:39 UTC35m
2026-06-24 N709KA - Jun 24, 16:45 UTCJun 24, 17:20 UTC35m
2026-06-24 N709KA - Jun 24, 15:35 UTCJun 24, 16:09 UTC35m
2026-06-24 N709KA - Jun 24, 15:09 UTCJun 24, 15:14 UTC5m
2026-06-24 N709KA - Jun 24, 00:05 UTCJun 24, 00:09 UTC5m
2026-06-23 N709KA - Jun 23, 22:55 UTCJun 23, 23:34 UTC40m
2026-06-23 N709KA - Jun 23, 21:45 UTCJun 23, 22:25 UTC40m
2026-06-23 N709KA - Jun 23, 21:10 UTCJun 23, 21:20 UTC10m
2026-06-23 N709KA - Jun 23, 19:24 UTCJun 23, 20:04 UTC40m
2026-06-23 N709KA - Jun 23, 18:10 UTCJun 23, 18:50 UTC40m
2026-06-23 N709KA - Jun 23, 16:59 UTCJun 23, 17:34 UTC35m
2026-06-23 N709KA - Jun 23, 15:40 UTCJun 23, 16:20 UTC40m
2026-06-23 N709KA KEH → LKE Jun 23, 15:04 UTCJun 23, 15:15 UTC10m
2026-06-23 N709KA CKR → KEH Jun 23, 00:45 UTCJun 23, 01:40 UTC55m
2026-06-22 N709KA - Jun 22, 23:20 UTCJun 23, 00:04 UTC45m
2026-06-22 N709KA KEH → LKE Jun 22, 22:54 UTCJun 22, 23:05 UTC10m
2026-06-22 N709KA - Jun 22, 21:05 UTCJun 22, 22:30 UTC1h 25m
2026-06-22 N709KA - Jun 22, 19:40 UTCJun 22, 19:44 UTC5m
2026-06-22 N709KA - Jun 22, 17:50 UTCJun 22, 19:24 UTC1h 35m
2026-06-22 N709KA - Jun 22, 15:05 UTCJun 22, 17:10 UTC2h 5m
2026-06-22 N709KA - Jun 22, 14:34 UTCJun 22, 14:40 UTC5m
2026-06-21 N709KA - Jun 21, 22:24 UTCJun 21, 23:00 UTC35m
2026-06-21 N709KA - Jun 21, 20:45 UTCJun 21, 21:34 UTC50m
2026-06-21 N709KA - Jun 21, 19:50 UTCJun 21, 20:24 UTC35m
2026-06-21 N709KA - Jun 21, 18:35 UTCJun 21, 19:14 UTC40m
2026-06-21 N709KA - Jun 21, 17:24 UTCJun 21, 18:04 UTC40m
2026-06-21 N709KA - Jun 21, 16:04 UTCJun 21, 16:49 UTC45m
2026-06-21 N709KA - Jun 21, 15:30 UTCJun 21, 15:40 UTC10m
2026-06-19 N709KA - Jun 19, 23:44 UTCJun 19, 23:54 UTC10m
2026-06-19 N709KA - Jun 19, 22:39 UTCJun 19, 23:14 UTC35m
2026-06-19 N709KA - Jun 19, 21:34 UTCJun 19, 22:09 UTC35m
2026-06-19 N709KA - Jun 19, 19:14 UTCJun 19, 19:49 UTC35m
2026-06-19 N709KA - Jun 19, 18:05 UTCJun 19, 18:44 UTC40m
2026-06-19 N709KA - Jun 19, 16:49 UTCJun 19, 17:24 UTC35m
2026-06-19 N709KA - Jun 19, 15:39 UTCJun 19, 16:19 UTC40m
2026-06-19 N709KA KEH → LKE Jun 19, 15:14 UTCJun 19, 15:19 UTC5m
2026-06-18 N709KA - Jun 18, 23:30 UTCJun 18, 23:40 UTC10m
2026-06-18 N709KA LKE → LKE Jun 18, 21:10 UTCJun 18, 23:15 UTC2h 5m
2026-06-18 N709KA - Jun 18, 19:25 UTCJun 18, 20:00 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 N709KA page for operator, model, and routing details .

Mode-S A976DF frequently asked

What is Mode-S code A976DF?
A976DF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N709KA.
Where is Mode-S A976DF registered?
Mode-S code A976DF 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 A976DF broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A976DF, octal 52273337, decimal 11,106,015.
What flights does A976DF operate?
Mode-S A976DF has broadcast 1 distinct callsign, including N709KA.