Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AD3FDE

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N953AT · BOEING 717-200 · operated by DELTA AIR LINES INC

Hex
AD3FDE
Octal
53237736
Decimal
11,354,078
Country
US
Tail
N953AT
Type
B712
No current signal · last broadcast Jul 26, 21:30 UTC
Flights observed
741
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:30 UTC

Last known position

Most recent position reported by Mode-S AD3FDE.

Country allocation

The ICAO 24-bit address AD3FDE 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
DAL1248 - 9 2026-06-26
DAL3068 - 8 2026-06-29
DAL3051 Delta Air Lines 8 2026-06-13
DAL1549 - 8 2026-07-24
DAL3127 Delta Air Lines 7 2026-07-22
DAL3078 - 7 2026-07-04
DAL3047 Delta Air Lines 7 2026-05-04
DAL3026 Delta Air Lines 7 2026-07-26
DAL2620 Delta Air Lines 7 2026-07-21
DAL2599 - 7 2026-06-26
DAL2573 - 7 2026-07-13
DAL2358 Delta Air Lines 7 2026-06-05
DAL2182 Delta Air Lines 7 2026-07-24
DAL1420 Delta Air Lines 7 2026-06-14
DAL1186 - 7 2026-06-17
DAL3193 - 6 2026-07-02
DAL3173 Delta Air Lines 6 2026-07-06
DAL3164 Delta Air Lines 6 2026-07-24
DAL3151 Delta Air Lines 6 2026-05-31
DAL3063 Delta Air Lines 6 2026-05-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL3026 ATL → HSV Jul 26, 21:15 UTCJul 26, 21:30 UTC15m
2026-07-26 DAL1704 DTW → FLL Jul 26, 18:25 UTCJul 26, 19:30 UTC1h 5m
2026-07-26 DAL1704 DTW → FLL Jul 26, 18:23 UTCJul 26, 19:56 UTC1h 33m
2026-07-26 DAL1704 DTW → FLL Jul 26, 15:35 UTCJul 26, 17:15 UTC1h 40m
2026-07-25 DAL2718 ATL → BDL Jul 25, 22:50 UTCJul 25, 23:40 UTC50m
2026-07-25 DAL2718 ATL → BDL Jul 25, 18:50 UTCJul 25, 19:40 UTC50m
2026-07-25 DAL441 RDU → MSP Jul 25, 15:20 UTCJul 25, 17:00 UTC1h 40m
2026-07-25 DAL441 RDU → MSP Jul 25, 12:35 UTCJul 25, 14:15 UTC1h 40m
2026-07-25 DAL3042 ATL → TYS Jul 25, 03:15 UTCJul 25, 03:45 UTC30m
2026-07-25 DAL3042 ATL → TYS Jul 25, 00:55 UTCJul 25, 01:30 UTC35m
2026-07-24 DAL1549 MSP → ATL Jul 24, 20:50 UTCJul 24, 21:45 UTC55m
2026-07-24 DAL1549 - Jul 24, 17:50 UTCJul 24, 18:25 UTC35m
2026-07-24 DAL1549 MSP → ATL Jul 24, 17:46 UTCJul 24, 18:24 UTC38m
2026-07-24 DAL3164 ATL → BHM Jul 24, 16:05 UTCJul 24, 16:40 UTC35m
2026-07-24 DAL3164 ATL → BHM Jul 24, 16:00 UTCJul 24, 16:36 UTC36m
2026-07-24 DAL3164 ATL → BHM Jul 24, 14:15 UTCJul 24, 14:35 UTC20m
2026-07-24 DAL1624 SAN → MSP Jul 24, 11:30 UTCJul 24, 12:25 UTC55m
2026-07-24 DAL1577 AUS → DTW Jul 24, 02:10 UTCJul 24, 03:00 UTC50m
2026-07-24 DAL1577 AUS → DTW Jul 24, 02:05 UTCJul 24, 02:55 UTC50m
2026-07-24 DAL2182 SFO → DTW Jul 24, 00:05 UTCJul 24, 00:40 UTC35m
2026-07-23 DAL2182 SFO → DTW Jul 23, 21:50 UTCJul 23, 22:20 UTC30m
2026-07-23 DAL1549 - Jul 23, 19:45 UTCJul 23, 20:30 UTC45m
2026-07-23 DAL1549 - Jul 23, 18:00 UTCJul 23, 18:35 UTC35m
2026-07-23 DAL1374 - Jul 23, 15:35 UTCJul 23, 16:40 UTC1h 5m
2026-07-23 DAL1374 SDF → ATL Jul 23, 15:33 UTCJul 23, 16:29 UTC56m
2026-07-23 DAL1374 ATL → SDF Jul 23, 13:40 UTCJul 23, 14:30 UTC50m
2026-07-23 DAL2275 ATL → AVL Jul 23, 11:10 UTCJul 23, 11:50 UTC40m
2026-07-23 DAL3177 GPT → ATL Jul 23, 02:55 UTCJul 23, 03:40 UTC45m
2026-07-22 DAL2758 MSP → PHX Jul 22, 23:50 UTCJul 23, 01:10 UTC1h 20m
2026-07-22 DAL2758 MSP → PHX Jul 22, 21:30 UTCJul 22, 22:45 UTC1h 15m
2026-07-22 DAL3127 MLB → ATL Jul 22, 19:00 UTCJul 22, 20:05 UTC1h 5m
2026-07-22 DAL3127 MLB → ATL Jul 22, 16:40 UTCJul 22, 17:50 UTC1h 10m
2026-07-22 DAL1708 - Jul 22, 14:55 UTCJul 22, 15:30 UTC35m
2026-07-22 DAL1708 - Jul 22, 13:15 UTCJul 22, 13:45 UTC30m
2026-07-22 DAL2128 ATL → ICT Jul 22, 00:20 UTCJul 22, 02:10 UTC1h 50m
2026-07-21 DAL2128 ATL → ICT Jul 21, 20:45 UTCJul 21, 22:25 UTC1h 40m
2026-07-21 DAL2620 RDU → BOS Jul 21, 18:00 UTCJul 21, 19:25 UTC1h 25m
2026-07-21 DAL2620 RDU → BOS Jul 21, 15:30 UTCJul 21, 17:00 UTC1h 30m
2026-07-20 DAL2048 - Jul 20, 18:00 UTCJul 20, 18:45 UTC45m
2026-07-20 DAL2048 VPS → ATL Jul 20, 17:55 UTCJul 20, 18:41 UTC46m
2026-07-20 DAL2048 - Jul 20, 14:25 UTCJul 20, 15:05 UTC40m
2026-07-20 DAL2116 - Jul 20, 12:25 UTCJul 20, 13:05 UTC40m
2026-07-20 DAL2241 - Jul 20, 00:55 UTCJul 20, 01:35 UTC40m
2026-07-19 DAL2020 - Jul 19, 20:40 UTCJul 19, 22:50 UTC2h 10m
2026-07-19 DAL2020 OKC → ATL Jul 19, 20:39 UTCJul 19, 22:48 UTC2h 9m
2026-07-19 DAL2020 ATL → OKC Jul 19, 15:45 UTCJul 19, 17:25 UTC1h 40m
2026-07-19 DAL2802 - Jul 19, 12:45 UTCJul 19, 13:25 UTC40m
2026-07-19 DAL2802 BNA → ATL Jul 19, 12:40 UTCJul 19, 13:23 UTC43m
2026-07-19 DAL3121 ATL → BNA Jul 19, 03:25 UTCJul 19, 04:05 UTC40m
2026-07-19 DAL3027 ATL → LIT Jul 19, 00:50 UTCJul 19, 02:05 UTC1h 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 N953AT page for operator, model, and routing details .

Mode-S AD3FDE frequently asked

What is Mode-S code AD3FDE?
AD3FDE is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N953AT.
Where is Mode-S AD3FDE registered?
Mode-S code AD3FDE 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 AD3FDE broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD3FDE, octal 53237736, decimal 11,354,078.
What flights does AD3FDE operate?
Mode-S AD3FDE has broadcast 20 distinct callsigns, including DAL1248, DAL3068, DAL3051, DAL1549, DAL3127.