Apparatus

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sensors Mode-S transponder

A66935

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N512DN · AIRBUS A-350-900 · operated by DELTA AIR LINES INC

Hex
A66935
Octal
51464465
Decimal
10,905,909
Country
US
Tail
N512DN
Type
A359
No current signal · last broadcast Jul 26, 20:45 UTC
Flights observed
267
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:45 UTC

Last known position

Most recent position reported by Mode-S A66935.

Country allocation

The ICAO 24-bit address A66935 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 20 distinct

Callsign Airline Flights Last seen
DAL389 - 35 2026-07-14
DAL281 - 35 2026-07-16
DAL388 - 25 2026-07-17
DAL275 Delta Air Lines 25 2026-07-22
DAL280 - 23 2026-07-15
DAL274 Delta Air Lines 15 2026-07-23
DAL137 Delta Air Lines 14 2026-07-26
DAL173 Delta Air Lines 12 2026-06-06
DAL136 Delta Air Lines 12 2026-07-26
DAL68 - 10 2026-07-02
DAL197 Delta Air Lines 10 2026-07-02
DAL196 - 10 2026-07-03
DAL95 Delta Air Lines 9 2026-07-22
DAL172 Delta Air Lines 9 2026-06-05
DAL69 - 7 2026-07-01
DAL96 Delta Air Lines 4 2026-07-21
DAL83 - 4 2026-07-18
DAL82 - 4 2026-07-18
DAL26 Delta Air Lines 2 2026-06-07
DAL147 Delta Air Lines 1 2026-06-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL137 AMS → DTW Jul 26, 12:45 UTCJul 26, 14:30 UTC1h 45m
2026-07-26 DAL137 AMS → DTW Jul 26, 12:42 UTCJul 26, 20:42 UTC8h 0m
2026-07-26 DAL136 DTW → AMS Jul 26, 02:55 UTCJul 26, 09:55 UTC7h 1m
2026-07-25 DAL137 AMS → DTW Jul 25, 12:55 UTCJul 25, 14:30 UTC1h 35m
2026-07-25 DAL137 AMS → DTW Jul 25, 12:54 UTCJul 25, 20:47 UTC7h 53m
2026-07-25 DAL136 DTW → AMS Jul 25, 02:55 UTCJul 25, 09:55 UTC7h 0m
2026-07-24 DAL137 AMS → DTW Jul 24, 12:40 UTCJul 24, 13:15 UTC35m
2026-07-24 DAL137 AMS → DTW Jul 24, 12:40 UTCJul 24, 20:32 UTC7h 52m
2026-07-24 DAL137 AMS → DTW Jul 24, 12:40 UTCJul 24, 20:30 UTC7h 50m
2026-07-24 DAL136 DTW → AMS Jul 24, 03:20 UTCJul 24, 10:00 UTC6h 40m
2026-07-23 DAL274 ATL → CDG Jul 23, 11:21 UTCJul 23, 22:37 UTC11h 16m
2026-07-23 DAL274 ATL → CDG Jul 23, 11:25 UTCJul 23, 21:15 UTC9h 50m
2026-07-22 DAL275 DTW → HND Jul 22, 19:55 UTCJul 23, 00:25 UTC4h 30m
2026-07-22 DAL275 DTW → HND Jul 22, 19:54 UTCJul 23, 09:07 UTC13h 13m
2026-07-22 DAL95 DTW → CDG Jul 22, 10:20 UTCJul 22, 11:10 UTC50m
2026-07-22 DAL95 DTW → CDG Jul 22, 09:29 UTCJul 22, 17:37 UTC8h 8m
2026-07-21 DAL96 NRT → GUM Jul 21, 23:40 UTCJul 22, 05:15 UTC5h 35m
2026-07-21 DAL96 NRT → GUM Jul 21, 23:36 UTCJul 22, 06:46 UTC7h 10m
2026-07-21 DAL137 AMS → DTW Jul 21, 13:02 UTCJul 21, 20:52 UTC7h 50m
2026-07-21 DAL137 AMS → DTW Jul 21, 13:05 UTCJul 21, 14:40 UTC1h 35m
2026-07-21 DAL136 DTW → AMS Jul 21, 03:00 UTCJul 21, 10:06 UTC7h 6m
2026-07-21 DAL136 DTW → AMS Jul 21, 03:05 UTCJul 21, 10:05 UTC7h 0m
2026-07-20 DAL274 HND → DTW Jul 20, 09:47 UTCJul 20, 21:29 UTC11h 42m
2026-07-20 DAL274 HND → DTW Jul 20, 09:50 UTCJul 20, 21:35 UTC11h 45m
2026-07-19 DAL275 DTW → HND Jul 19, 18:30 UTCJul 19, 19:15 UTC45m
2026-07-19 DAL275 DTW → HND Jul 19, 18:25 UTCJul 20, 07:04 UTC12h 39m
2026-07-19 DAL95 DTW → CDG Jul 19, 07:55 UTCJul 19, 09:15 UTC1h 20m
2026-07-19 DAL95 DTW → CDG Jul 19, 07:50 UTCJul 19, 15:34 UTC7h 44m
2026-07-18 DAL82 ATL → CDG Jul 18, 20:07 UTCJul 19, 03:54 UTC7h 47m
2026-07-18 DAL82 - Jul 18, 20:10 UTCJul 19, 03:15 UTC7h 5m
2026-07-18 DAL83 - Jul 18, 08:10 UTCJul 18, 16:45 UTC8h 35m
2026-07-18 DAL83 CDG → ATL Jul 18, 08:06 UTCJul 18, 16:38 UTC8h 32m
2026-07-17 DAL96 NRT → GUM Jul 17, 21:25 UTCJul 18, 04:40 UTC7h 16m
2026-07-17 DAL388 - Jul 17, 03:34 UTCJul 17, 16:44 UTC13h 10m
2026-07-16 DAL388 - Jul 16, 09:20 UTCJul 17, 05:20 UTC20h 0m
2026-07-16 DAL281 - Jul 16, 08:20 UTCJul 17, 05:20 UTC21h 0m
2026-07-15 DAL281 SEA → PVG Jul 15, 23:40 UTCJul 16, 11:00 UTC11h 20m
2026-07-15 DAL281 - Jul 15, 23:45 UTCJul 16, 10:20 UTC10h 35m
2026-07-15 DAL280 - Jul 15, 10:50 UTCJul 15, 12:35 UTC1h 45m
2026-07-15 DAL280 PVG → SEA Jul 15, 09:56 UTCJul 15, 20:52 UTC10h 56m
2026-07-15 DAL280 - Jul 15, 04:50 UTCJul 15, 20:55 UTC16h 5m
2026-07-14 DAL389 - Jul 14, 17:20 UTCJul 15, 12:35 UTC19h 14m
2026-07-14 DAL389 - Jul 14, 16:40 UTCJul 15, 06:40 UTC13h 59m
2026-07-14 DAL389 DTW → PVG Jul 14, 16:36 UTCJul 15, 07:32 UTC14h 56m
2026-07-13 DAL274 HND → DTW Jul 13, 10:10 UTCJul 13, 22:05 UTC11h 55m
2026-07-12 DAL275 DTW → HND Jul 12, 18:16 UTCJul 13, 06:42 UTC12h 26m
2026-07-12 DAL275 - Jul 12, 18:20 UTCJul 13, 06:45 UTC12h 25m
2026-07-12 DAL95 - Jul 12, 07:40 UTCJul 12, 09:15 UTC1h 35m
2026-07-12 DAL95 CDG → DTW Jul 12, 07:37 UTCJul 12, 15:22 UTC7h 45m
2026-07-12 DAL95 CDG → DTW Jul 12, 07:37 UTCJul 12, 15:20 UTC7h 43m

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 N512DN page for operator, model, and routing details .

Mode-S A66935 frequently asked

What is Mode-S code A66935?
A66935 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N512DN.
Where is Mode-S A66935 registered?
Mode-S code A66935 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 A66935 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A66935, octal 51464465, decimal 10,905,909.
What flights does A66935 operate?
Mode-S A66935 has broadcast 20 distinct callsigns, including DAL389, DAL281, DAL388, DAL275, DAL280.