Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AD5FEF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N961AT · BOEING 717-200 · operated by DELTA AIR LINES INC

Hex
AD5FEF
Octal
53257757
Decimal
11,362,287
Country
US
Tail
N961AT
Type
B712
Transponder active on ground
Flights observed
356
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S AD5FEF.

Country allocation

The ICAO 24-bit address AD5FEF 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
DAL3094 Delta Air Lines 6 2026-05-21
DAL1637 Delta Air Lines 6 2026-05-24
DAL876 - 5 2026-04-16
DAL733 Delta Air Lines 5 2026-04-27
DAL2609 Delta Air Lines 5 2026-04-28
DAL1283 Delta Air Lines 5 2026-05-20
DAL1235 Delta Air Lines 5 2026-05-11
DAL955 Delta Air Lines 4 2026-04-28
DAL512 Delta Air Lines 4 2026-05-27
DAL3108 Delta Air Lines 4 2026-05-29
DAL3064 Delta Air Lines 4 2026-05-19
DAL3051 Delta Air Lines 4 2026-05-21
DAL3011 Delta Air Lines 4 2026-05-12
DAL2596 Delta Air Lines 4 2026-04-28
DAL2577 Delta Air Lines 4 2026-04-27
DAL2039 Delta Air Lines 4 2026-04-26
DAL2037 Delta Air Lines 4 2026-05-04
DAL1481 Delta Air Lines 4 2026-05-16
DAL1255 Delta Air Lines 4 2026-05-20
DAL952 Delta Air Lines 3 2026-05-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 DAL3053 - May 29, 22:25 UTCMay 29, 23:05 UTC40m
2026-05-29 DAL3133 GNV → ATL May 29, 19:55 UTCMay 29, 20:55 UTC1h 0m
2026-05-29 DAL3133 GNV → ATL May 29, 17:55 UTCMay 29, 18:35 UTC40m
2026-05-29 DAL3108 ATL → DAY May 29, 15:25 UTCMay 29, 16:40 UTC1h 15m
2026-05-29 DAL3108 ATL → DAY May 29, 13:10 UTCMay 29, 14:10 UTC1h 0m
2026-05-29 DAL3158 RIC → ATL May 29, 11:10 UTCMay 29, 11:50 UTC40m
2026-05-29 DAL3158 RIC → ATL May 29, 11:08 UTCMay 29, 11:47 UTC39m
2026-05-28 DAL3139 ATL → CLT May 28, 23:10 UTCMay 28, 23:50 UTC40m
2026-05-28 DAL3095 ATL → GSP May 28, 21:20 UTCMay 28, 21:50 UTC30m
2026-05-28 DAL3095 ATL → GSP May 28, 19:35 UTCMay 28, 20:10 UTC35m
2026-05-28 DAL3012 BHM → ATL May 28, 17:05 UTCMay 28, 17:40 UTC35m
2026-05-28 DAL3012 BHM → ATL May 28, 17:03 UTCMay 28, 17:40 UTC37m
2026-05-28 DAL3012 BHM → ATL May 28, 15:25 UTCMay 28, 15:55 UTC30m
2026-05-28 DAL3183 JAN → ATL May 28, 12:40 UTCMay 28, 13:25 UTC45m
2026-05-28 DAL3117 ATL → JAN May 28, 03:00 UTCMay 28, 03:40 UTC40m
2026-05-28 DAL3117 ATL → JAN May 28, 02:58 UTCMay 28, 03:49 UTC51m
2026-05-27 DAL2086 DSM → ATL May 27, 23:50 UTCMay 28, 01:30 UTC1h 40m
2026-05-27 DAL2086 DSM → ATL May 27, 21:20 UTCMay 27, 23:00 UTC1h 40m
2026-05-27 DAL2620 RDU → BOS May 27, 18:00 UTCMay 27, 19:30 UTC1h 30m
2026-05-27 DAL2620 RDU → BOS May 27, 15:10 UTCMay 27, 16:45 UTC1h 35m
2026-05-27 DAL516 LAX → JFK May 27, 12:05 UTCMay 27, 13:40 UTC1h 35m
2026-05-27 DAL1104 JFK → LAS May 27, 04:39 UTCMay 27, 06:25 UTC1h 45m
2026-05-27 DAL512 DAL → ATL May 27, 01:19 UTCMay 27, 01:44 UTC25m
2026-05-27 DAL512 DAL → ATL May 27, 01:16 UTCMay 27, 03:00 UTC1h 44m
2026-05-26 DAL512 DAL → ATL May 26, 23:35 UTCMay 26, 23:45 UTC10m
2026-05-26 DAL512 DAL → ATL May 26, 18:24 UTCMay 26, 20:54 UTC2h 30m
2026-05-26 DAL1286 MCO → LGA May 26, 15:54 UTCMay 26, 16:35 UTC40m
2026-05-26 DAL1286 MCO → LGA May 26, 15:43 UTCMay 26, 16:39 UTC56m
2026-05-26 DAL1286 MCO → LGA May 26, 13:45 UTCMay 26, 14:35 UTC50m
2026-05-26 DAL2853 JAX → DTW May 26, 11:44 UTCMay 26, 12:30 UTC45m
2026-05-26 DAL2853 JAX → DTW May 26, 11:44 UTCMay 26, 12:23 UTC39m
2026-05-26 DAL2015 CUN → DTW May 26, 01:44 UTCMay 26, 02:19 UTC35m
2026-05-25 DAL1700 BOS → DTW May 25, 23:19 UTCMay 26, 00:19 UTC1h 0m
2026-05-25 DAL1700 BOS → DTW May 25, 19:05 UTCMay 25, 20:04 UTC1h 0m
2026-05-25 DAL2681 MSN → ATL May 25, 16:05 UTCMay 25, 17:45 UTC1h 40m
2026-05-25 DAL2681 MSN → ATL May 25, 16:02 UTCMay 25, 17:44 UTC1h 42m
2026-05-25 DAL2681 MSN → ATL May 25, 13:20 UTCMay 25, 14:55 UTC1h 35m
2026-05-25 DAL3085 VPS → ATL May 25, 11:05 UTCMay 25, 11:40 UTC35m
2026-05-25 DAL3085 VPS → ATL May 25, 10:58 UTCMay 25, 11:41 UTC43m
2026-05-24 DAL2803 MSP → SJC May 24, 23:00 UTCMay 24, 23:35 UTC35m
2026-05-24 DAL1637 ATL → MSP May 24, 18:55 UTCMay 24, 21:10 UTC2h 15m
2026-05-24 DAL1637 ATL → MSP May 24, 18:54 UTCMay 24, 21:09 UTC2h 15m
2026-05-24 DAL1637 ATL → MSP May 24, 15:35 UTCMay 24, 17:25 UTC1h 50m
2026-05-23 DAL2827 DAB → ATL May 23, 19:30 UTCMay 23, 20:35 UTC1h 5m
2026-05-23 DAL2827 DAB → ATL May 23, 17:15 UTCMay 23, 18:10 UTC55m
2026-05-23 DAL3069 BNA → ATL May 23, 14:55 UTCMay 23, 15:30 UTC35m
2026-05-23 DAL3069 BNA → ATL May 23, 12:45 UTCMay 23, 13:30 UTC45m
2026-05-23 DAL2184 LGA → ORD May 23, 10:05 UTCMay 23, 11:10 UTC1h 5m
2026-05-23 DAL2184 LGA → ORD May 23, 10:02 UTCMay 23, 11:08 UTC1h 6m
2026-05-23 DAL2213 ATL → LEX May 23, 04:10 UTCMay 23, 05:05 UTC55m

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 N961AT page for operator, model, and routing details .

Mode-S AD5FEF frequently asked

What is Mode-S code AD5FEF?
AD5FEF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N961AT.
Where is Mode-S AD5FEF registered?
Mode-S code AD5FEF 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 AD5FEF broadcasting right now?
Mode-S AD5FEF 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 AD5FEF, octal 53257757, decimal 11,362,287.
What flights does AD5FEF operate?
Mode-S AD5FEF has broadcast 20 distinct callsigns, including DAL3094, DAL1637, DAL876, DAL733, DAL2609.