Apparatus

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sensors Mode-S transponder

A64578

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N503DZ · AIRBUS A-321neo · operated by DELTA AIR LINES INC

Hex
A64578
Octal
51442570
Decimal
10,896,760
Country
US
Tail
N503DZ
Type
A21N
Broadcasting now · callsign DAL688 · 30,000 ft
Flights observed
428
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:00 UTC

Current position

A64578 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A64578 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
DAL506 Delta Air Lines 12 2026-07-24
DAL1961 Delta Air Lines 12 2026-06-06
DAL671 - 9 2026-07-15
DAL1854 Delta Air Lines 8 2026-06-06
DAL351 - 7 2026-06-21
DAL1859 Delta Air Lines 7 2026-06-06
DAL1672 - 7 2026-07-14
DAL658 Delta Air Lines 6 2026-07-26
DAL422 - 6 2026-06-15
DAL419 Delta Air Lines 6 2026-07-26
DAL359 - 6 2026-06-22
DAL347 - 6 2026-06-22
DAL338 Delta Air Lines 6 2026-05-29
DAL2555 - 6 2026-07-15
DAL564 Delta Air Lines 5 2026-04-19
DAL345 Delta Air Lines 5 2026-07-23
DAL2031 - 5 2026-07-15
DAL1994 Delta Air Lines 5 2026-06-05
DAL1975 - 5 2026-07-03
DAL1397 Delta Air Lines 5 2026-05-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL2591 DTW → IND Jul 26, 20:25 UTCJul 26, 22:00 UTC1h 35m
2026-07-26 DAL799 LAX → MSP Jul 26, 15:15 UTCJul 26, 18:15 UTC3h 0m
2026-07-26 DAL658 HNL → LAX Jul 26, 11:50 UTCJul 26, 12:50 UTC1h 0m
2026-07-26 DAL658 HNL → LAX Jul 26, 07:50 UTCJul 26, 08:10 UTC20m
2026-07-26 DAL419 LAX → SFO Jul 26, 04:40 UTCJul 26, 05:00 UTC20m
2026-07-25 DAL419 LAX → SFO Jul 25, 23:20 UTCJul 26, 00:15 UTC55m
2026-07-25 DAL2921 SLC → SEA Jul 25, 19:45 UTCJul 25, 21:25 UTC1h 40m
2026-07-25 DAL387 ATL → SLC Jul 25, 14:20 UTCJul 25, 17:50 UTC3h 30m
2026-07-25 DAL387 ATL → SLC Jul 25, 14:19 UTCJul 25, 17:39 UTC3h 20m
2026-07-25 DAL652 DEN → BOS Jul 25, 07:30 UTCJul 25, 11:40 UTC4h 10m
2026-07-24 DAL506 LGA → ATL Jul 24, 23:10 UTCJul 25, 04:55 UTC5h 45m
2026-07-24 DAL506 LGA → ATL Jul 24, 16:05 UTCJul 24, 21:20 UTC5h 15m
2026-07-24 DAL375 ATL → BOS Jul 24, 08:00 UTCJul 24, 13:18 UTC5h 18m
2026-07-23 DAL345 BOS → SEA Jul 23, 23:16 UTCJul 24, 04:59 UTC5h 43m
2026-07-23 DAL345 BOS → SEA Jul 23, 23:20 UTCJul 24, 04:40 UTC5h 20m
2026-07-23 DAL2921 SLC → SEA Jul 23, 19:45 UTCJul 23, 21:20 UTC1h 35m
2026-07-23 DAL387 ATL → SLC Jul 23, 14:29 UTCJul 23, 17:46 UTC3h 17m
2026-07-23 DAL387 ATL → SLC Jul 23, 14:30 UTCJul 23, 17:55 UTC3h 25m
2026-07-23 DAL320 BOS → SEA Jul 23, 07:00 UTCJul 23, 10:55 UTC3h 55m
2026-07-21 DAL1876 SJD → LAX Jul 21, 22:45 UTCJul 21, 23:40 UTC55m
2026-07-21 DAL1876 SJD → LAX Jul 21, 21:36 UTCJul 21, 23:34 UTC1h 58m
2026-07-21 DAL1875 - Jul 21, 18:05 UTCJul 21, 19:25 UTC1h 20m
2026-07-21 DAL1875 LAX → SJD Jul 21, 18:03 UTCJul 21, 20:04 UTC2h 1m
2026-07-21 DAL996 ATL → LAX Jul 21, 11:45 UTCJul 21, 15:40 UTC3h 55m
2026-07-21 DAL302 BOS → SFO Jul 21, 07:00 UTCJul 21, 09:25 UTC2h 25m
2026-07-21 DAL302 BOS → SFO Jul 21, 06:57 UTCJul 21, 09:18 UTC2h 21m
2026-07-21 DAL493 JFK → SDQ Jul 21, 01:05 UTCJul 21, 03:35 UTC2h 30m
2026-07-21 DAL493 JFK → SDQ Jul 21, 01:03 UTCJul 21, 03:39 UTC2h 36m
2026-07-20 DAL906 SLC → ATL Jul 20, 20:15 UTCJul 20, 23:30 UTC3h 15m
2026-07-20 DAL1318 LAX → SLC Jul 20, 16:05 UTCJul 20, 17:30 UTC1h 25m
2026-07-20 DAL1318 LAX → SLC Jul 20, 16:02 UTCJul 20, 17:26 UTC1h 24m
2026-07-20 DAL450 - Jul 20, 03:20 UTCJul 20, 08:00 UTC4h 40m
2026-07-19 DAL811 JFK → MIA Jul 19, 18:00 UTCJul 19, 22:55 UTC4h 55m
2026-07-19 DAL996 ATL → LAX Jul 19, 11:35 UTCJul 19, 15:40 UTC4h 5m
2026-07-18 DAL906 SLC → ATL Jul 18, 19:55 UTCJul 18, 23:50 UTC3h 55m
2026-07-18 DAL1698 LAS → SLC Jul 18, 17:20 UTCJul 18, 18:20 UTC1h 0m
2026-07-18 DAL1698 SLC → LAS Jul 18, 14:35 UTCJul 18, 15:25 UTC50m
2026-07-18 DAL2223 ANC → SLC Jul 18, 08:55 UTCJul 18, 13:05 UTC4h 10m
2026-07-18 DAL2713 SLC → ANC Jul 18, 03:10 UTCJul 18, 07:25 UTC4h 15m
2026-07-17 DAL887 SLC → JFK Jul 17, 21:10 UTCJul 18, 01:45 UTC4h 35m
2026-07-17 DAL510 LAS → JFK Jul 17, 14:37 UTCJul 17, 19:20 UTC4h 43m
2026-07-17 DAL510 LAS → JFK Jul 17, 14:39 UTCJul 17, 19:30 UTC4h 50m
2026-07-17 DAL568 JFK → LAS Jul 17, 00:20 UTCJul 17, 04:54 UTC4h 35m
2026-07-16 DAL1822 - Jul 16, 20:19 UTCJul 16, 21:15 UTC55m
2026-07-16 DAL1845 JFK → STI Jul 16, 12:45 UTCJul 16, 15:55 UTC3h 10m
2026-07-16 DAL1845 - Jul 16, 12:44 UTCJul 16, 13:45 UTC1h 0m
2026-07-15 DAL671 SLC → JFK Jul 15, 20:45 UTCJul 16, 00:50 UTC4h 5m
2026-07-15 DAL671 SLC → JFK Jul 15, 20:43 UTCJul 16, 00:42 UTC3h 59m
2026-07-15 DAL2031 MCO → SLC Jul 15, 15:00 UTCJul 15, 18:55 UTC3h 55m
2026-07-15 DAL2555 - Jul 15, 11:20 UTCJul 15, 13:25 UTC2h 5m

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 N503DZ page for operator, model, and routing details .

Mode-S A64578 frequently asked

What is Mode-S code A64578?
A64578 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N503DZ.
Where is Mode-S A64578 registered?
Mode-S code A64578 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 A64578 broadcasting right now?
Yes. Mode-S A64578 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A64578, octal 51442570, decimal 10,896,760.
What flights does A64578 operate?
Mode-S A64578 has broadcast 20 distinct callsigns, including DAL506, DAL1961, DAL671, DAL1854, DAL351.