Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A797B4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N589DT · AIRBUS A-321neo · operated by DELTA AIR LINES INC

Hex
A797B4
Octal
51713664
Decimal
10,983,348
Country
US
Tail
N589DT
Type
A21N
Transponder active on ground
Flights observed
211
Distinct callsigns
20
Country
US
Last broadcast
15h ago

Last known position

Most recent position reported by Mode-S A797B4.

Country allocation

The ICAO 24-bit address A797B4 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
DAL2049 - 6 2026-04-13
DAL2038 Delta Air Lines 6 2026-05-27
DAL1659 Delta Air Lines 6 2026-05-27
DAL781 Delta Air Lines 5 2026-05-06
DAL649 Delta Air Lines 5 2026-05-26
DAL1210 Delta Air Lines 5 2026-05-28
DAL1009 Delta Air Lines 5 2026-05-27
DAL887 Delta Air Lines 4 2026-05-06
DAL820 Delta Air Lines 4 2026-05-17
DAL792 Delta Air Lines 4 2026-05-18
DAL784 Delta Air Lines 4 2026-04-15
DAL740 Delta Air Lines 4 2026-04-16
DAL718 Delta Air Lines 4 2026-05-18
DAL697 Delta Air Lines 4 2026-05-14
DAL510 Delta Air Lines 4 2026-05-06
DAL917 - 3 2026-04-17
DAL859 Delta Air Lines 3 2026-05-17
DAL795 Delta Air Lines 3 2026-04-14
DAL719 - 3 2026-04-14
DAL671 Delta Air Lines 3 2026-04-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 DAL889 PDX → JFK May 29, 15:45 UTCMay 29, 18:45 UTC3h 0m
2026-05-29 DAL377 JFK → SFO May 29, 06:19 UTCMay 29, 11:26 UTC5h 7m
2026-05-29 DAL377 JFK → SFO May 29, 06:20 UTCMay 29, 07:15 UTC55m
2026-05-28 DAL377 JFK → SFO May 28, 23:25 UTCMay 29, 04:25 UTC5h 0m
2026-05-28 DAL413 LAX → MSP May 28, 18:40 UTCMay 28, 21:45 UTC3h 5m
2026-05-28 DAL450 DTW → SFO May 28, 11:50 UTCMay 28, 16:45 UTC4h 55m
2026-05-28 DAL2040 OMA → ATL May 28, 05:35 UTCMay 28, 09:50 UTC4h 15m
2026-05-28 DAL1210 LAX → SFO May 28, 02:13 UTCMay 28, 03:34 UTC1h 21m
2026-05-28 DAL1210 LAX → SFO May 28, 02:15 UTCMay 28, 03:35 UTC1h 20m
2026-05-27 DAL1210 LAX → SFO May 27, 23:10 UTCMay 28, 00:50 UTC1h 40m
2026-05-27 DAL1659 BOS → DTW May 27, 20:45 UTCMay 27, 21:40 UTC55m
2026-05-27 DAL1659 BOS → DTW May 27, 18:00 UTCMay 27, 19:05 UTC1h 5m
2026-05-27 DAL1009 JFK → LAS May 27, 11:50 UTCMay 27, 16:00 UTC4h 10m
2026-05-27 DAL2038 MKE → ATL May 27, 06:20 UTCMay 27, 10:10 UTC3h 51m
2026-05-26 DAL647 CUN → SLC May 26, 22:29 UTCMay 27, 02:39 UTC4h 10m
2026-05-26 DAL649 SLC → CUN May 26, 15:45 UTCMay 26, 20:00 UTC4h 15m
2026-05-26 DAL649 SLC → CUN May 26, 15:45 UTCMay 26, 20:01 UTC4h 16m
2026-05-26 DAL2117 JFK → AUS May 26, 01:55 UTCMay 26, 05:10 UTC3h 15m
2026-05-25 DAL361 DTW → SFO May 25, 19:00 UTCMay 25, 23:04 UTC4h 4m
2026-05-25 DAL361 DTW → SFO May 25, 12:45 UTCMay 25, 17:15 UTC4h 30m
2026-05-25 DAL2255 MSP → DTW May 25, 01:55 UTCMay 25, 03:30 UTC1h 35m
2026-05-24 DAL526 ATL → SLC May 24, 23:00 UTCMay 24, 23:10 UTC10m
2026-05-24 DAL526 ATL → SLC May 24, 19:30 UTCMay 24, 21:45 UTC2h 15m
2026-05-24 DAL526 ATL → SLC May 24, 19:30 UTCMay 24, 23:02 UTC3h 32m
2026-05-24 DAL897 SJC → ATL May 24, 14:30 UTCMay 24, 17:45 UTC3h 15m
2026-05-24 DAL897 SJC → ATL May 24, 14:29 UTCMay 24, 17:42 UTC3h 13m
2026-05-24 DAL660 ATL → SLC May 24, 00:45 UTCMay 24, 04:15 UTC3h 30m
2026-05-23 DAL906 SLC → BOS May 23, 20:00 UTCMay 23, 23:15 UTC3h 15m
2026-05-23 DAL387 ATL → SLC May 23, 14:55 UTCMay 23, 18:30 UTC3h 36m
2026-05-23 DAL899 LAX → ATL May 23, 06:30 UTCMay 23, 10:25 UTC3h 55m
2026-05-22 DAL614 CUN → LAX May 22, 23:15 UTCMay 23, 03:45 UTC4h 29m
2026-05-22 DAL615 LAX → CUN May 22, 17:35 UTCMay 22, 21:30 UTC3h 55m
2026-05-22 DAL996 ATL → LAX May 22, 11:20 UTCMay 22, 15:30 UTC4h 10m
2026-05-22 DAL912 CLT → ATL May 22, 05:50 UTCMay 22, 09:00 UTC3h 10m
2026-05-22 DAL1210 LAX → SFO May 22, 00:30 UTCMay 22, 02:05 UTC1h 35m
2026-05-21 DAL1210 LAX → SFO May 21, 21:20 UTCMay 21, 22:50 UTC1h 30m
2026-05-21 DAL464 LAX → OGG May 21, 14:55 UTCMay 21, 19:55 UTC5h 0m
2026-05-20 DAL702 SLC → BOS May 20, 23:35 UTCMay 21, 03:25 UTC3h 50m
2026-05-20 DAL1659 BOS → DTW May 20, 20:35 UTCMay 20, 21:30 UTC55m
2026-05-20 DAL1659 BOS → DTW May 20, 18:00 UTCMay 20, 19:00 UTC1h 0m
2026-05-20 DAL1009 JFK → LAS May 20, 11:30 UTCMay 20, 16:00 UTC4h 30m
2026-05-20 DAL2038 MKE → ATL May 20, 06:05 UTCMay 20, 09:45 UTC3h 40m
2026-05-19 DAL2036 BOS → NAS May 19, 23:45 UTCMay 20, 04:30 UTC4h 45m
2026-05-19 DAL2036 BOS → NAS May 19, 17:25 UTCMay 19, 21:45 UTC4h 20m
2026-05-19 DAL2025 MCO → MSP May 19, 11:30 UTCMay 19, 15:40 UTC4h 10m
2026-05-18 DAL718 JFK → PHX May 18, 23:40 UTCMay 19, 04:15 UTC4h 35m
2026-05-18 DAL2974 BOS → MCO May 18, 18:15 UTCMay 18, 21:50 UTC3h 34m
2026-05-18 DAL792 LAX → MSP May 18, 13:35 UTCMay 18, 16:30 UTC2h 55m
2026-05-18 DAL1197 BNA → BOS May 18, 05:30 UTCMay 18, 07:00 UTC1h 30m
2026-05-17 DAL820 CVG → BOS May 17, 22:20 UTCMay 18, 02:35 UTC4h 15m

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 N589DT page for operator, model, and routing details .

Mode-S A797B4 frequently asked

What is Mode-S code A797B4?
A797B4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N589DT.
Where is Mode-S A797B4 registered?
Mode-S code A797B4 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 A797B4 broadcasting right now?
Mode-S A797B4 is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A797B4, octal 51713664, decimal 10,983,348.
What flights does A797B4 operate?
Mode-S A797B4 has broadcast 20 distinct callsigns, including DAL2049, DAL2038, DAL1659, DAL781, DAL649.