Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A6456D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N503DN · AIRBUS A-350-900 · operated by DELTA AIR LINES INC

Hex
A6456D
Octal
51442555
Decimal
10,896,749
Country
US
Tail
N503DN
Type
A359
Broadcasting now · callsign DAL196 · 3,725 ft
Flights observed
254
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 15:30 UTC

Current position

A6456D is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A6456D 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
DAL281 Delta Air Lines 21 2026-07-25
DAL68 Delta Air Lines 20 2026-07-23
DAL69 Delta Air Lines 19 2026-07-21
DAL389 Delta Air Lines 19 2026-07-20
DAL197 Delta Air Lines 16 2026-07-23
DAL275 Delta Air Lines 14 2026-07-18
DAL274 - 14 2026-07-19
DAL196 Delta Air Lines 14 2026-07-24
DAL388 Delta Air Lines 12 2026-07-26
DAL280 Delta Air Lines 11 2026-07-21
DAL96 - 9 2026-07-11
DAL95 Delta Air Lines 8 2026-07-18
DAL83 - 8 2026-07-16
DAL82 - 8 2026-07-17
DAL173 Delta Air Lines 8 2026-06-04
DAL172 Delta Air Lines 7 2026-06-03
DAL71 - 6 2026-06-28
DAL70 - 5 2026-06-27
DAL137 Delta Air Lines 5 2026-05-29
DAL136 Delta Air Lines 5 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL388 SFO → JFK Jul 26, 03:05 UTCJul 26, 15:30 UTC12h 26m
2026-07-25 DAL388 SFO → JFK Jul 25, 09:20 UTCJul 26, 04:55 UTC19h 35m
2026-07-25 DAL281 SEA → PVG Jul 25, 08:40 UTCJul 26, 04:55 UTC20h 15m
2026-07-25 DAL281 SEA → PVG Jul 25, 00:05 UTCJul 25, 10:35 UTC10h 30m
2026-07-25 DAL281 SEA → PVG Jul 25, 00:02 UTCJul 25, 11:20 UTC11h 18m
2026-07-24 DAL196 ICN → SEA Jul 24, 10:25 UTCJul 24, 11:15 UTC50m
2026-07-24 DAL196 ICN → SEA Jul 24, 10:20 UTCJul 24, 20:12 UTC9h 52m
2026-07-24 DAL196 ICN → SEA Jul 24, 10:20 UTCJul 24, 20:03 UTC9h 43m
2026-07-23 DAL197 SEA → ICN Jul 23, 20:20 UTCJul 24, 06:50 UTC10h 30m
2026-07-23 DAL197 SEA → ICN Jul 23, 20:17 UTCJul 24, 06:50 UTC10h 33m
2026-07-23 DAL68 TPE → SEA Jul 23, 04:25 UTCJul 23, 05:45 UTC1h 20m
2026-07-23 DAL68 TPE → SEA Jul 23, 02:50 UTCJul 23, 03:05 UTC15m
2026-07-23 DAL68 TPE → SEA Jul 23, 02:47 UTCJul 23, 13:56 UTC11h 9m
2026-07-23 DAL68 TPE → SEA Jul 23, 02:47 UTCJul 23, 13:56 UTC11h 9m
2026-07-21 DAL69 SEA → TPE Jul 21, 23:45 UTCJul 22, 00:30 UTC45m
2026-07-21 DAL69 SEA → TPE Jul 21, 23:42 UTCJul 22, 11:22 UTC11h 40m
2026-07-21 DAL280 SIN → ATL Jul 21, 05:05 UTCJul 21, 20:50 UTC15h 45m
2026-07-20 DAL280 SIN → ATL Jul 20, 21:20 UTCJul 21, 20:50 UTC23h 29m
2026-07-20 DAL389 JFK → DEN Jul 20, 17:20 UTCJul 21, 12:50 UTC19h 29m
2026-07-20 DAL389 JFK → DEN Jul 20, 16:35 UTCJul 21, 07:38 UTC15h 3m
2026-07-20 DAL389 JFK → DEN Jul 20, 16:35 UTCJul 21, 12:50 UTC20h 14m
2026-07-19 DAL274 HND → DTW Jul 19, 10:05 UTCJul 19, 21:30 UTC11h 25m
2026-07-18 DAL275 DTW → HND Jul 18, 18:35 UTCJul 19, 07:30 UTC12h 55m
2026-07-18 DAL275 DTW → HND Jul 18, 18:35 UTCJul 19, 07:20 UTC12h 45m
2026-07-18 DAL95 DTW → CDG Jul 18, 08:20 UTCJul 18, 16:05 UTC7h 45m
2026-07-17 DAL82 - Jul 17, 21:10 UTCJul 18, 05:05 UTC7h 56m
2026-07-16 DAL83 - Jul 16, 08:15 UTCJul 16, 16:49 UTC8h 35m
2026-07-15 DAL82 ATL → CDG Jul 15, 20:18 UTCJul 16, 04:15 UTC7h 57m
2026-07-15 DAL82 - Jul 15, 20:20 UTCJul 16, 04:10 UTC7h 50m
2026-07-14 DAL83 - Jul 14, 08:55 UTCJul 14, 17:20 UTC8h 25m
2026-07-13 DAL82 ATL → CDG Jul 13, 21:39 UTCJul 14, 05:35 UTC7h 56m
2026-07-13 DAL82 ATL → CDG Jul 13, 21:40 UTCJul 14, 05:30 UTC7h 50m
2026-07-12 DAL1036 MSP → ATL Jul 12, 23:45 UTCJul 13, 01:45 UTC2h 0m
2026-07-12 DAL2825 ATL → MSP Jul 12, 19:52 UTCJul 12, 21:46 UTC1h 54m
2026-07-12 DAL2825 ATL → MSP Jul 12, 19:55 UTCJul 12, 21:55 UTC2h 0m
2026-07-12 DAL83 CDG → ATL Jul 12, 08:05 UTCJul 12, 16:35 UTC8h 30m
2026-07-11 DAL96 - Jul 11, 21:20 UTCJul 12, 04:25 UTC7h 5m
2026-07-11 DAL388 PVG → DTW Jul 11, 02:03 UTCJul 11, 15:34 UTC13h 31m
2026-07-10 DAL281 - Jul 10, 00:10 UTCJul 10, 11:25 UTC11h 15m
2026-07-09 DAL196 - Jul 9, 10:30 UTCJul 9, 12:30 UTC2h 0m
2026-07-09 DAL196 ICN → SEA Jul 9, 10:30 UTCJul 9, 20:11 UTC9h 41m
2026-07-09 DAL196 ICN → SEA Jul 9, 10:30 UTCJul 9, 20:08 UTC9h 38m
2026-07-08 DAL197 - Jul 8, 20:50 UTCJul 9, 00:25 UTC3h 35m
2026-07-08 DAL197 SEA → ICN Jul 8, 20:50 UTCJul 9, 08:05 UTC11h 15m
2026-07-08 DAL68 - Jul 8, 02:05 UTCJul 8, 02:25 UTC20m
2026-07-08 DAL68 TPE → SEA Jul 8, 02:04 UTCJul 8, 12:48 UTC10h 44m
2026-07-08 DAL68 TPE → SEA Jul 8, 02:04 UTCJul 8, 12:38 UTC10h 34m
2026-07-07 DAL69 - Jul 7, 11:00 UTCJul 7, 11:25 UTC25m
2026-07-07 DAL69 - Jul 7, 00:05 UTCJul 7, 09:50 UTC9h 45m
2026-07-06 DAL196 - Jul 6, 10:10 UTCJul 6, 19:35 UTC9h 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 N503DN page for operator, model, and routing details .

Mode-S A6456D frequently asked

What is Mode-S code A6456D?
A6456D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N503DN.
Where is Mode-S A6456D registered?
Mode-S code A6456D 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 A6456D broadcasting right now?
Yes. Mode-S A6456D is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6456D, octal 51442555, decimal 10,896,749.
What flights does A6456D operate?
Mode-S A6456D has broadcast 20 distinct callsigns, including DAL281, DAL68, DAL69, DAL389, DAL197.