Apparatus

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sensors Mode-S transponder

A64CDB

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N505DN · AIRBUS A-350-900 · operated by DELTA AIR LINES INC

Hex
A64CDB
Octal
51446333
Decimal
10,898,651
Country
US
Tail
N505DN
Type
A359
No current signal · last broadcast Jul 26, 16:15 UTC
Flights observed
219
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 16:15 UTC

Last known position

Most recent position reported by Mode-S A64CDB.

Country allocation

The ICAO 24-bit address A64CDB 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 - 28 2026-07-13
DAL281 Delta Air Lines 22 2026-07-24
DAL69 Delta Air Lines 21 2026-07-21
DAL68 Delta Air Lines 20 2026-07-22
DAL197 Delta Air Lines 16 2026-07-22
DAL280 - 15 2026-07-14
DAL275 - 14 2026-07-11
DAL388 Delta Air Lines 13 2026-07-25
DAL274 - 13 2026-07-12
DAL196 Delta Air Lines 13 2026-07-23
DAL172 Delta Air Lines 10 2026-05-06
DAL173 Delta Air Lines 8 2026-05-07
DAL96 Delta Air Lines 4 2026-07-25
DAL167 - 4 2026-06-12
DAL95 - 3 2026-07-11
DAL83 Delta Air Lines 3 2026-07-26
DAL166 - 3 2026-06-13
DAL9908 Delta Air Lines 2 2026-06-11
DAL137 Delta Air Lines 2 2026-05-12
DAL136 Delta Air Lines 2 2026-05-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL83 CDG → ATL Jul 26, 07:45 UTCJul 26, 08:50 UTC1h 5m
2026-07-26 DAL83 CDG → ATL Jul 26, 07:41 UTCJul 26, 16:13 UTC8h 32m
2026-07-25 DAL96 NRT → GUM Jul 25, 21:25 UTCJul 26, 04:25 UTC7h 0m
2026-07-25 DAL96 NRT → GUM Jul 25, 21:22 UTCJul 26, 04:21 UTC6h 59m
2026-07-25 DAL388 SFO → JFK Jul 25, 03:00 UTCJul 25, 15:40 UTC12h 40m
2026-07-24 DAL388 SFO → JFK Jul 24, 08:50 UTCJul 25, 04:40 UTC19h 50m
2026-07-24 DAL281 SEA → PVG Jul 24, 08:25 UTCJul 25, 04:40 UTC20h 15m
2026-07-24 DAL281 SEA → PVG Jul 24, 00:06 UTCJul 24, 11:02 UTC10h 56m
2026-07-24 DAL281 SEA → PVG Jul 24, 00:10 UTCJul 24, 08:45 UTC8h 35m
2026-07-23 DAL196 ICN → SEA Jul 23, 10:20 UTCJul 23, 20:20 UTC10h 0m
2026-07-22 DAL197 SEA → ICN Jul 22, 20:15 UTCJul 23, 06:45 UTC10h 30m
2026-07-22 DAL197 SEA → ICN Jul 22, 20:13 UTCJul 23, 06:55 UTC10h 42m
2026-07-22 DAL68 TPE → SEA Jul 22, 03:35 UTCJul 22, 12:45 UTC9h 10m
2026-07-22 DAL68 TPE → SEA Jul 22, 02:00 UTCJul 22, 02:15 UTC15m
2026-07-21 DAL69 SEA → TPE Jul 21, 11:30 UTCJul 21, 11:45 UTC15m
2026-07-20 DAL69 SEA → TPE Jul 20, 23:45 UTCJul 21, 10:15 UTC10h 30m
2026-07-20 DAL196 ICN → SEA Jul 20, 10:15 UTCJul 20, 10:40 UTC25m
2026-07-20 DAL196 ICN → SEA Jul 20, 10:10 UTCJul 20, 20:21 UTC10h 11m
2026-07-19 DAL197 - Jul 19, 20:25 UTCJul 20, 06:55 UTC10h 30m
2026-07-19 DAL68 TPE → SEA Jul 19, 01:40 UTCJul 19, 12:45 UTC11h 5m
2026-07-18 DAL69 - Jul 18, 11:05 UTCJul 18, 11:20 UTC15m
2026-07-17 DAL69 - Jul 17, 23:50 UTCJul 18, 09:55 UTC10h 6m
2026-07-17 DAL196 ICN → SEA Jul 17, 10:15 UTCJul 17, 20:15 UTC10h 0m
2026-07-16 DAL197 SEA → ICN Jul 16, 21:10 UTCJul 17, 07:55 UTC10h 45m
2026-07-16 DAL68 - Jul 16, 03:20 UTCJul 16, 12:55 UTC9h 35m
2026-07-16 DAL68 - Jul 16, 01:45 UTCJul 16, 02:00 UTC15m
2026-07-15 DAL69 - Jul 15, 11:10 UTCJul 15, 11:25 UTC15m
2026-07-15 DAL69 - Jul 15, 00:05 UTCJul 15, 09:55 UTC9h 50m
2026-07-15 DAL69 SEA → TPE Jul 15, 00:05 UTCJul 15, 11:31 UTC11h 26m
2026-07-14 DAL280 - Jul 14, 11:10 UTCJul 14, 13:05 UTC1h 55m
2026-07-14 DAL280 - Jul 14, 04:10 UTCJul 14, 21:10 UTC17h 0m
2026-07-13 DAL280 - Jul 13, 22:50 UTCJul 14, 21:10 UTC22h 20m
2026-07-13 DAL389 - Jul 13, 22:15 UTCJul 14, 20:45 UTC22h 30m
2026-07-13 DAL389 - Jul 13, 18:50 UTCJul 14, 13:05 UTC18h 15m
2026-07-13 DAL389 DTW → PVG Jul 13, 16:48 UTCJul 14, 06:54 UTC14h 6m
2026-07-13 DAL389 - Jul 13, 16:50 UTCJul 14, 13:05 UTC20h 15m
2026-07-12 DAL274 - Jul 12, 09:55 UTCJul 12, 21:35 UTC11h 40m
2026-07-11 DAL275 - Jul 11, 18:20 UTCJul 12, 06:30 UTC12h 10m
2026-07-11 DAL275 DTW → HND Jul 11, 18:18 UTCJul 12, 06:40 UTC12h 22m
2026-07-11 DAL95 - Jul 11, 07:45 UTCJul 11, 08:45 UTC1h 0m
2026-07-11 DAL95 CDG → DTW Jul 11, 07:45 UTCJul 11, 15:35 UTC7h 50m
2026-07-10 DAL82 - Jul 10, 20:55 UTCJul 11, 04:35 UTC7h 40m
2026-07-09 DAL83 - Jul 9, 08:20 UTCJul 9, 17:05 UTC8h 45m
2026-07-08 DAL96 - Jul 8, 21:20 UTCJul 9, 04:25 UTC7h 5m
2026-07-08 DAL388 - Jul 8, 02:50 UTCJul 8, 15:20 UTC12h 30m
2026-07-07 DAL388 SFO → JFK Jul 7, 09:00 UTCJul 8, 04:40 UTC19h 40m
2026-07-07 DAL281 - Jul 7, 00:30 UTCJul 7, 10:35 UTC10h 5m
2026-07-06 DAL280 - Jul 6, 06:15 UTCJul 6, 21:35 UTC15h 20m
2026-07-06 DAL280 - Jul 6, 00:55 UTCJul 6, 21:35 UTC20h 40m
2026-07-05 DAL389 - Jul 5, 23:10 UTCJul 6, 21:35 UTC22h 25m

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 N505DN page for operator, model, and routing details .

Mode-S A64CDB frequently asked

What is Mode-S code A64CDB?
A64CDB is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N505DN.
Where is Mode-S A64CDB registered?
Mode-S code A64CDB 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 A64CDB broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 16:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A64CDB, octal 51446333, decimal 10,898,651.
What flights does A64CDB operate?
Mode-S A64CDB has broadcast 20 distinct callsigns, including DAL389, DAL281, DAL69, DAL68, DAL197.