Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A7D673

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N604DN · AIRBUS A-321neo · operated by DELTA AIR LINES INC

Hex
A7D673
Octal
51753163
Decimal
10,999,411
Country
US
Tail
N604DN
Type
A21N
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
401
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S A7D673.

Country allocation

The ICAO 24-bit address A7D673 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
DAL334 Delta Air Lines 11 2026-05-09
DAL820 - 9 2026-07-10
DAL709 - 9 2026-07-15
DAL1966 Delta Air Lines 9 2026-06-10
DAL883 - 8 2026-06-11
DAL499 Delta Air Lines 8 2026-05-05
DAL1406 - 8 2026-07-14
DAL2049 - 7 2026-07-11
DAL697 - 6 2026-07-10
DAL2605 Delta Air Lines 6 2026-07-23
DAL1655 Delta Air Lines 6 2026-06-02
DAL1210 Delta Air Lines 6 2026-06-03
DAL749 - 5 2026-07-04
DAL702 Delta Air Lines 5 2026-05-06
DAL696 - 5 2026-07-12
DAL356 Delta Air Lines 5 2026-07-26
DAL338 Delta Air Lines 5 2026-07-26
DAL2775 - 5 2026-06-26
DAL2045 Delta Air Lines 5 2026-07-22
DAL2040 - 5 2026-07-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL338 JFK → SAN Jul 26, 20:30 UTCJul 26, 22:45 UTC2h 15m
2026-07-26 DAL356 SFO → JFK Jul 26, 12:35 UTCJul 26, 18:10 UTC5h 35m
2026-07-26 DAL356 SFO → JFK Jul 26, 12:33 UTCJul 26, 18:10 UTC5h 37m
2026-07-26 DAL477 LAX → ATL Jul 26, 06:15 UTCJul 26, 11:00 UTC4h 46m
2026-07-25 DAL450 DTW → SFO Jul 25, 23:50 UTCJul 26, 04:30 UTC4h 40m
2026-07-25 DAL811 JFK → MIA Jul 25, 17:00 UTCJul 25, 21:45 UTC4h 45m
2026-07-25 DAL2103 MSP → STL Jul 25, 03:10 UTCJul 25, 06:30 UTC3h 20m
2026-07-24 DAL2935 MSP → SAT Jul 24, 23:35 UTCJul 25, 01:40 UTC2h 5m
2026-07-24 DAL2658 STL → DTW Jul 24, 19:45 UTCJul 24, 22:00 UTC2h 15m
2026-07-24 DAL1675 SLC → PHL Jul 24, 15:40 UTCJul 24, 17:05 UTC1h 25m
2026-07-24 DAL1675 SLC → PHL Jul 24, 12:15 UTCJul 24, 13:50 UTC1h 35m
2026-07-23 DAL2198 ATL → EWR Jul 23, 22:45 UTCJul 24, 01:50 UTC3h 5m
2026-07-23 DAL895 ATL → LAX Jul 23, 16:55 UTCJul 23, 21:05 UTC4h 10m
2026-07-23 DAL2605 BOS → ORD Jul 23, 14:15 UTCJul 23, 15:20 UTC1h 5m
2026-07-23 DAL2605 BOS → ORD Jul 23, 14:11 UTCJul 23, 15:17 UTC1h 6m
2026-07-23 DAL2605 BOS → ORD Jul 23, 11:40 UTCJul 23, 12:40 UTC1h 0m
2026-07-22 DAL2045 MSP → FAR Jul 22, 23:55 UTCJul 23, 01:35 UTC1h 40m
2026-07-22 DAL1070 MCO → MSP Jul 22, 18:10 UTCJul 22, 21:25 UTC3h 15m
2026-07-22 DAL1070 MCO → MSP Jul 22, 12:55 UTCJul 22, 16:30 UTC3h 35m
2026-07-21 DAL2244 ATL → MSY Jul 21, 20:10 UTCJul 21, 23:05 UTC2h 55m
2026-07-21 DAL1434 LAX → SLC Jul 21, 17:10 UTCJul 21, 18:35 UTC1h 25m
2026-07-21 DAL484 - Jul 21, 10:55 UTCJul 21, 15:15 UTC4h 20m
2026-07-21 DAL1740 - Jul 21, 01:10 UTCJul 21, 03:15 UTC2h 5m
2026-07-19 DAL429 SEA → JFK Jul 19, 14:51 UTCJul 19, 19:18 UTC4h 27m
2026-07-19 DAL429 SEA → JFK Jul 19, 14:55 UTCJul 19, 19:20 UTC4h 25m
2026-07-18 DAL2995 SLC → SEA Jul 18, 18:35 UTCJul 18, 20:10 UTC1h 35m
2026-07-18 DAL830 ATL → SLC Jul 18, 13:30 UTCJul 18, 16:45 UTC3h 15m
2026-07-18 DAL905 - Jul 18, 00:35 UTCJul 18, 03:55 UTC3h 21m
2026-07-17 DAL9937 PIT → JFK Jul 17, 15:05 UTCJul 17, 16:34 UTC1h 30m
2026-07-16 DAL2391 MSP → PDX Jul 16, 03:15 UTCJul 16, 06:25 UTC3h 10m
2026-07-15 DAL1661 PDX → MSP Jul 15, 22:10 UTCJul 16, 01:00 UTC2h 50m
2026-07-15 DAL1661 PDX → MSP Jul 15, 22:07 UTCJul 16, 00:57 UTC2h 50m
2026-07-15 DAL1574 JFK → PDX Jul 15, 12:55 UTCJul 15, 18:10 UTC5h 15m
2026-07-15 DAL709 - Jul 15, 05:20 UTCJul 15, 10:20 UTC5h 0m
2026-07-14 DAL709 JFK → SAN Jul 14, 21:40 UTCJul 15, 02:20 UTC4h 39m
2026-07-14 DAL1406 AUS → JFK Jul 14, 16:35 UTCJul 14, 20:05 UTC3h 30m
2026-07-14 DAL1406 JFK → AUS Jul 14, 11:35 UTCJul 14, 14:35 UTC3h 0m
2026-07-13 DAL671 SLC → JFK Jul 13, 21:00 UTCJul 14, 01:15 UTC4h 15m
2026-07-13 DAL671 SLC → JFK Jul 13, 20:59 UTCJul 14, 01:15 UTC4h 16m
2026-07-13 DAL663 ATL → SLC Jul 13, 16:25 UTCJul 13, 19:40 UTC3h 15m
2026-07-13 DAL923 BOS → ATL Jul 13, 12:55 UTCJul 13, 15:05 UTC2h 10m
2026-07-12 DAL977 - Jul 12, 19:40 UTCJul 13, 01:05 UTC5h 25m
2026-07-12 DAL977 BOS → SFO Jul 12, 11:35 UTCJul 12, 17:15 UTC5h 40m
2026-07-12 DAL696 SLC → BOS Jul 12, 05:45 UTCJul 12, 09:55 UTC4h 10m
2026-07-12 DAL1691 MCO → SLC Jul 12, 00:10 UTCJul 12, 04:10 UTC4h 0m
2026-07-11 DAL1685 JFK → MCO Jul 11, 19:51 UTCJul 11, 22:23 UTC2h 32m
2026-07-11 DAL1685 JFK → MCO Jul 11, 19:55 UTCJul 11, 22:30 UTC2h 35m
2026-07-11 DAL2049 - Jul 11, 15:20 UTCJul 11, 17:30 UTC2h 10m
2026-07-11 DAL2049 JFK → MCO Jul 11, 11:35 UTCJul 11, 13:40 UTC2h 5m
2026-07-10 DAL697 SLC → JFK Jul 10, 23:55 UTCJul 11, 03:50 UTC3h 55m

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 N604DN page for operator, model, and routing details .

Mode-S A7D673 frequently asked

What is Mode-S code A7D673?
A7D673 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N604DN.
Where is Mode-S A7D673 registered?
Mode-S code A7D673 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 A7D673 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A7D673, octal 51753163, decimal 10,999,411.
What flights does A7D673 operate?
Mode-S A7D673 has broadcast 20 distinct callsigns, including DAL334, DAL820, DAL709, DAL1966, DAL883.