Apparatus

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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
No current signal · last broadcast 1h ago
Flights observed
706
Distinct callsigns
20
Country
US
Last broadcast
1h 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
DAL3011 Delta Air Lines 10 2026-05-31
DAL2157 - 10 2026-07-06
DAL2718 - 9 2026-07-10
DAL3094 - 8 2026-06-20
DAL512 Delta Air Lines 7 2026-06-12
DAL3083 - 7 2026-06-28
DAL3070 - 7 2026-07-10
DAL3051 - 7 2026-07-06
DAL2620 - 7 2026-07-09
DAL2609 - 7 2026-06-17
DAL1125 Delta Air Lines 7 2026-06-07
DAL940 - 6 2026-07-02
DAL876 Delta Air Lines 6 2026-06-16
DAL3183 - 6 2026-07-09
DAL3118 - 6 2026-06-26
DAL3108 Delta Air Lines 6 2026-06-09
DAL3078 Delta Air Lines 6 2026-06-13
DAL3040 - 6 2026-07-05
DAL3033 - 6 2026-07-10
DAL3026 - 6 2026-07-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 DAL3116 - Jul 14, 04:25 UTCJul 14, 05:05 UTC40m
2026-07-14 DAL2837 - Jul 14, 01:25 UTCJul 14, 02:55 UTC1h 30m
2026-07-13 DAL2837 - Jul 13, 23:00 UTCJul 14, 00:35 UTC1h 35m
2026-07-13 DAL1347 - Jul 13, 20:15 UTCJul 13, 21:35 UTC1h 20m
2026-07-13 DAL1347 - Jul 13, 16:30 UTCJul 13, 17:25 UTC55m
2026-07-13 DAL3173 - Jul 13, 14:25 UTCJul 13, 15:20 UTC55m
2026-07-13 DAL3173 - Jul 13, 12:20 UTCJul 13, 13:05 UTC45m
2026-07-13 DAL2184 - Jul 13, 10:15 UTCJul 13, 11:15 UTC1h 0m
2026-07-13 DAL2184 LEX → ATL Jul 13, 10:13 UTCJul 13, 11:12 UTC59m
2026-07-13 DAL2213 ATL → LEX Jul 13, 04:50 UTCJul 13, 05:35 UTC45m
2026-07-13 DAL1292 - Jul 13, 01:50 UTCJul 13, 02:50 UTC1h 0m
2026-07-12 DAL1292 - Jul 12, 22:50 UTCJul 12, 23:40 UTC50m
2026-07-12 DAL1115 DAL → ATL Jul 12, 19:35 UTCJul 12, 21:25 UTC1h 50m
2026-07-12 DAL1115 DAL → ATL Jul 12, 19:35 UTCJul 12, 21:37 UTC2h 2m
2026-07-12 DAL1115 ATL → DAL Jul 12, 15:45 UTCJul 12, 17:25 UTC1h 40m
2026-07-12 DAL3156 - Jul 12, 13:50 UTCJul 12, 14:30 UTC40m
2026-07-12 DAL3158 - Jul 12, 01:00 UTCJul 12, 01:45 UTC45m
2026-07-12 DAL3158 ATL → CLT Jul 12, 00:59 UTCJul 12, 01:40 UTC41m
2026-07-11 DAL1700 - Jul 11, 22:50 UTCJul 11, 23:40 UTC50m
2026-07-11 DAL1700 - Jul 11, 18:55 UTCJul 11, 19:50 UTC55m
2026-07-11 DAL1509 - Jul 11, 16:00 UTCJul 11, 17:40 UTC1h 40m
2026-07-11 DAL1509 - Jul 11, 12:45 UTCJul 11, 14:20 UTC1h 35m
2026-07-10 DAL2718 - Jul 10, 19:10 UTCJul 10, 20:40 UTC1h 30m
2026-07-10 DAL2718 - Jul 10, 17:05 UTCJul 10, 17:55 UTC50m
2026-07-10 DAL3033 - Jul 10, 14:35 UTCJul 10, 15:35 UTC1h 0m
2026-07-10 DAL3033 - Jul 10, 12:20 UTCJul 10, 13:15 UTC55m
2026-07-10 DAL3187 - Jul 10, 10:00 UTCJul 10, 10:55 UTC55m
2026-07-10 DAL3070 - Jul 10, 02:55 UTCJul 10, 03:45 UTC50m
2026-07-10 DAL3070 ATL → ILM Jul 10, 02:54 UTCJul 10, 03:49 UTC55m
2026-07-09 DAL3088 - Jul 9, 23:45 UTCJul 10, 01:00 UTC1h 15m
2026-07-09 DAL3088 ATL → DAY Jul 9, 21:45 UTCJul 9, 22:55 UTC1h 10m
2026-07-09 DAL2620 - Jul 9, 17:50 UTCJul 9, 19:40 UTC1h 50m
2026-07-09 DAL2620 - Jul 9, 15:05 UTCJul 9, 16:35 UTC1h 30m
2026-07-09 DAL3183 - Jul 9, 13:10 UTCJul 9, 13:55 UTC45m
2026-07-08 DAL3180 - Jul 8, 22:40 UTCJul 8, 23:20 UTC40m
2026-07-08 DAL2539 - Jul 8, 20:25 UTCJul 8, 21:15 UTC50m
2026-07-08 DAL2539 - Jul 8, 18:25 UTCJul 8, 19:10 UTC45m
2026-07-08 DAL2754 - Jul 8, 15:10 UTCJul 8, 16:40 UTC1h 30m
2026-07-08 DAL2754 ATL → TUL Jul 8, 12:25 UTCJul 8, 13:55 UTC1h 30m
2026-07-08 DAL1666 - Jul 8, 10:15 UTCJul 8, 11:05 UTC50m
2026-07-08 DAL1666 MEM → ATL Jul 8, 10:12 UTCJul 8, 11:03 UTC51m
2026-07-08 DAL2001 - Jul 8, 00:20 UTCJul 8, 01:20 UTC1h 0m
2026-07-08 DAL2001 ATL → MEM Jul 8, 00:18 UTCJul 8, 01:23 UTC1h 5m
2026-07-07 DAL3026 - Jul 7, 21:30 UTCJul 7, 22:00 UTC30m
2026-07-07 DAL3026 ATL → HSV Jul 7, 19:45 UTCJul 7, 20:15 UTC30m
2026-07-07 DAL1704 - Jul 7, 16:35 UTCJul 7, 18:15 UTC1h 40m
2026-07-07 DAL1704 ATL → DSM Jul 7, 13:40 UTCJul 7, 15:15 UTC1h 35m
2026-07-07 DAL3004 - Jul 7, 10:45 UTCJul 7, 11:35 UTC50m
2026-07-07 DAL1617 - Jul 7, 01:15 UTCJul 7, 02:05 UTC50m
2026-07-06 DAL3050 ATL → GSO Jul 6, 22:55 UTCJul 6, 23:45 UTC50m

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?
No active broadcast right now. Last signal was 1h ago.
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 DAL3011, DAL2157, DAL2718, DAL3094, DAL512.