Apparatus

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sensors Mode-S transponder

A68D02

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N521DT · AIRBUS A-321neo · operated by DELTA AIR LINES INC

Hex
A68D02
Octal
51506402
Decimal
10,915,074
Country
US
Tail
N521DT
Type
A21N
Broadcasting now · callsign DAL332 · 4,875 ft
Flights observed
444
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:20 UTC

Current position

A68D02 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A68D02 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
DAL658 - 16 2026-07-08
DAL465 - 13 2026-07-08
DAL440 - 12 2026-07-15
DAL419 Delta Air Lines 10 2026-06-12
DAL485 - 8 2026-07-05
DAL829 - 7 2026-07-08
DAL612 Delta Air Lines 7 2026-07-20
DAL506 - 7 2026-07-12
DAL464 - 7 2026-06-25
DAL2921 - 7 2026-06-11
DAL1961 Delta Air Lines 7 2026-05-16
DAL784 Delta Air Lines 6 2026-05-01
DAL546 Delta Air Lines 6 2026-05-01
DAL328 - 6 2026-07-15
DAL311 - 6 2026-06-30
DAL2848 Delta Air Lines 6 2026-04-20
DAL1854 Delta Air Lines 6 2026-05-16
DAL799 - 5 2026-06-23
DAL795 Delta Air Lines 5 2026-04-30
DAL792 - 5 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL526 ATL → SLC Jul 26, 19:35 UTCJul 26, 22:20 UTC2h 45m
2026-07-26 DAL897 SJC → ATL Jul 26, 14:30 UTCJul 26, 17:45 UTC3h 15m
2026-07-25 DAL887 SLC → JFK Jul 25, 21:15 UTCJul 26, 01:50 UTC4h 35m
2026-07-25 DAL451 BOS → DFW Jul 25, 14:10 UTCJul 25, 18:40 UTC4h 30m
2026-07-24 DAL684 JFK → ATL Jul 24, 22:40 UTCJul 25, 04:10 UTC5h 30m
2026-07-24 DAL1792 CVG → ATL Jul 24, 16:15 UTCJul 24, 20:10 UTC3h 55m
2026-07-24 DAL1792 CVG → ATL Jul 24, 16:13 UTCJul 24, 20:03 UTC3h 50m
2026-07-24 DAL3229 FLL → MSP Jul 24, 11:20 UTCJul 24, 14:35 UTC3h 15m
2026-07-24 DAL2255 MSP → DTW Jul 24, 02:50 UTCJul 24, 05:45 UTC2h 55m
2026-07-23 DAL2036 BOS → NAS Jul 23, 21:05 UTCJul 24, 01:10 UTC4h 5m
2026-07-23 DAL482 JFK → ATL Jul 23, 14:55 UTCJul 23, 19:30 UTC4h 35m
2026-07-23 DAL476 ATL → SLC Jul 23, 12:15 UTCJul 23, 13:00 UTC45m
2026-07-22 DAL344 SEA → LIH Jul 22, 22:15 UTCJul 22, 23:05 UTC50m
2026-07-22 DAL648 MSP → CUN Jul 22, 15:45 UTCJul 22, 20:15 UTC4h 30m
2026-07-22 DAL1719 MCO → BOS Jul 22, 00:20 UTCJul 22, 11:50 UTC11h 30m
2026-07-21 DAL1942 - Jul 21, 13:00 UTCJul 21, 13:45 UTC45m
2026-07-21 DAL1943 JFK → SDQ Jul 21, 01:33 UTCJul 21, 05:01 UTC3h 28m
2026-07-21 DAL1943 JFK → SDQ Jul 21, 01:35 UTCJul 21, 02:15 UTC40m
2026-07-20 DAL612 AUA → JFK Jul 20, 19:25 UTCJul 20, 22:25 UTC3h 0m
2026-07-20 DAL612 AUA → JFK Jul 20, 18:10 UTCJul 20, 18:25 UTC15m
2026-07-20 DAL612 AUA → JFK Jul 20, 18:07 UTCJul 20, 22:22 UTC4h 15m
2026-07-20 DAL613 JFK → AUA Jul 20, 11:55 UTCJul 20, 16:30 UTC4h 35m
2026-07-20 DAL1969 STI → JFK Jul 20, 04:05 UTCJul 20, 05:55 UTC1h 50m
2026-07-19 DAL1855 JFK → STI Jul 19, 21:35 UTCJul 19, 22:20 UTC45m
2026-07-19 DAL1855 JFK → STI Jul 19, 21:35 UTCJul 20, 00:38 UTC3h 3m
2026-07-19 DAL9891 ATL → JFK Jul 19, 12:00 UTCJul 19, 13:50 UTC1h 50m
2026-07-19 DAL9891 ATL → JFK Jul 19, 11:59 UTCJul 19, 13:48 UTC1h 49m
2026-07-18 DAL1792 ATL → JFK Jul 18, 17:43 UTCJul 18, 22:08 UTC4h 25m
2026-07-18 DAL1792 SLC → ATL Jul 18, 17:45 UTCJul 18, 21:20 UTC3h 35m
2026-07-18 DAL3229 DTW → SLC Jul 18, 12:25 UTCJul 18, 15:45 UTC3h 20m
2026-07-17 DAL708 LAX → DTW Jul 17, 23:00 UTCJul 18, 03:05 UTC4h 6m
2026-07-17 DAL1651 - Jul 17, 18:19 UTCJul 17, 21:30 UTC3h 10m
2026-07-17 DAL792 LAX → MSP Jul 17, 13:25 UTCJul 17, 16:40 UTC3h 15m
2026-07-17 DAL792 LAX → MSP Jul 17, 13:23 UTCJul 17, 16:40 UTC3h 17m
2026-07-16 DAL382 MCO → LAX Jul 16, 22:25 UTCJul 17, 02:59 UTC4h 35m
2026-07-16 DAL2032 - Jul 16, 16:05 UTCJul 16, 20:35 UTC4h 30m
2026-07-16 DAL1128 - Jul 16, 13:00 UTCJul 16, 14:29 UTC1h 30m
2026-07-16 DAL1128 SEA → SLC Jul 16, 12:56 UTCJul 16, 14:28 UTC1h 32m
2026-07-15 DAL328 - Jul 15, 23:30 UTCJul 16, 04:50 UTC5h 20m
2026-07-15 DAL328 SEA → MCO Jul 15, 16:30 UTCJul 15, 21:45 UTC5h 15m
2026-07-15 DAL440 - Jul 15, 13:35 UTCJul 15, 14:25 UTC50m
2026-07-15 DAL440 - Jul 15, 09:05 UTCJul 15, 09:15 UTC10m
2026-07-15 DAL443 LAX → HNL Jul 15, 01:55 UTCJul 15, 07:15 UTC5h 20m
2026-07-15 DAL443 LAX → HNL Jul 15, 01:52 UTCJul 15, 07:11 UTC5h 19m
2026-07-14 DAL1219 - Jul 14, 20:10 UTCJul 15, 00:20 UTC4h 9m
2026-07-14 DAL515 LAX → ATL Jul 14, 14:15 UTCJul 14, 18:15 UTC4h 0m
2026-07-13 DAL382 MCO → LAX Jul 13, 22:55 UTCJul 14, 03:30 UTC4h 35m
2026-07-13 DAL382 MCO → LAX Jul 13, 22:54 UTCJul 14, 03:33 UTC4h 39m
2026-07-13 DAL2032 SDF → ATL Jul 13, 16:00 UTCJul 13, 20:15 UTC4h 15m
2026-07-13 DAL1128 JFK → PBI Jul 13, 12:45 UTCJul 13, 14:25 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 N521DT page for operator, model, and routing details .

Mode-S A68D02 frequently asked

What is Mode-S code A68D02?
A68D02 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N521DT.
Where is Mode-S A68D02 registered?
Mode-S code A68D02 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 A68D02 broadcasting right now?
Yes. Mode-S A68D02 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A68D02, octal 51506402, decimal 10,915,074.
What flights does A68D02 operate?
Mode-S A68D02 has broadcast 20 distinct callsigns, including DAL658, DAL465, DAL440, DAL419, DAL485.