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 Jul 26, 21:15 UTC
Flights observed
805
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:15 UTC

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
DAL3051 Delta Air Lines 14 2026-07-26
DAL3011 Delta Air Lines 10 2026-05-31
DAL2157 - 10 2026-07-06
DAL3083 - 9 2026-07-15
DAL2718 - 9 2026-07-10
DAL3094 - 8 2026-06-20
DAL2609 Delta Air Lines 8 2026-07-22
DAL1637 - 8 2026-07-18
DAL512 Delta Air Lines 7 2026-06-12
DAL3173 Delta Air Lines 7 2026-07-25
DAL3070 - 7 2026-07-10
DAL2761 Delta Air Lines 7 2026-07-21
DAL2620 - 7 2026-07-09
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

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL2094 PHL → MSP Jul 26, 19:40 UTCJul 26, 21:10 UTC1h 30m
2026-07-26 DAL2094 PHL → MSP Jul 26, 16:45 UTCJul 26, 18:35 UTC1h 50m
2026-07-26 DAL3051 ATL → VPS Jul 26, 14:40 UTCJul 26, 15:40 UTC1h 0m
2026-07-26 DAL3051 ATL → VPS Jul 26, 12:30 UTCJul 26, 13:20 UTC50m
2026-07-26 DAL2556 MSP → SFO Jul 26, 10:45 UTCJul 26, 11:20 UTC35m
2026-07-26 DAL3022 ATL → HSV Jul 26, 02:50 UTCJul 26, 03:25 UTC35m
2026-07-26 DAL2211 ATL → CLE Jul 26, 00:35 UTCJul 26, 00:40 UTC5m
2026-07-25 DAL2211 ATL → CLE Jul 25, 23:30 UTCJul 26, 00:40 UTC1h 10m
2026-07-25 DAL2211 ATL → CLE Jul 25, 23:28 UTCJul 26, 00:18 UTC50m
2026-07-25 DAL2211 ATL → CLE Jul 25, 21:05 UTCJul 25, 21:55 UTC50m
2026-07-25 DAL2179 SFO → SLC Jul 25, 19:15 UTCJul 25, 20:00 UTC45m
2026-07-25 DAL2179 SFO → SLC Jul 25, 16:35 UTCJul 25, 17:25 UTC50m
2026-07-25 DAL3173 ATL → GSO Jul 25, 14:25 UTCJul 25, 15:10 UTC45m
2026-07-25 DAL3173 ATL → GSO Jul 25, 14:19 UTCJul 25, 15:09 UTC50m
2026-07-25 DAL3173 ATL → GSO Jul 25, 12:25 UTCJul 25, 13:10 UTC45m
2026-07-25 DAL2837 SLC → JAC Jul 25, 02:00 UTCJul 25, 03:30 UTC1h 30m
2026-07-24 DAL2837 SLC → JAC Jul 24, 23:40 UTCJul 25, 01:10 UTC1h 30m
2026-07-24 DAL1347 TPA → LGA Jul 24, 21:10 UTCJul 24, 22:20 UTC1h 10m
2026-07-24 DAL1347 TPA → LGA Jul 24, 16:50 UTCJul 24, 17:45 UTC55m
2026-07-24 DAL3051 ATL → VPS Jul 24, 14:30 UTCJul 24, 15:15 UTC45m
2026-07-24 DAL3051 ATL → VPS Jul 24, 12:45 UTCJul 24, 13:25 UTC40m
2026-07-24 DAL1666 IAH → LGA Jul 24, 10:20 UTCJul 24, 11:15 UTC55m
2026-07-24 DAL1230 BOS → MCI Jul 24, 00:20 UTCJul 24, 01:45 UTC1h 25m
2026-07-23 DAL1343 ATL → MSP Jul 23, 22:15 UTCJul 23, 22:55 UTC40m
2026-07-23 DAL1343 ATL → MSP Jul 23, 22:13 UTCJul 23, 22:53 UTC40m
2026-07-23 DAL1343 ATL → MSP Jul 23, 20:20 UTCJul 23, 21:15 UTC55m
2026-07-23 DAL2331 ATL → JAX Jul 23, 17:55 UTCJul 23, 19:10 UTC1h 15m
2026-07-23 DAL2331 ATL → JAX Jul 23, 17:53 UTCJul 23, 19:05 UTC1h 12m
2026-07-23 DAL2331 ATL → JAX Jul 23, 15:40 UTCJul 23, 16:40 UTC1h 0m
2026-07-23 DAL1626 MSP → MSY Jul 23, 11:35 UTCJul 23, 12:35 UTC1h 0m
2026-07-23 DAL1541 FLL → LGA Jul 23, 00:05 UTCJul 23, 01:20 UTC1h 15m
2026-07-22 DAL1621 SFO → JFK Jul 22, 21:15 UTCJul 22, 22:40 UTC1h 25m
2026-07-22 DAL1621 SFO → JFK Jul 22, 18:50 UTCJul 22, 20:00 UTC1h 10m
2026-07-22 DAL2596 PHL → ATL Jul 22, 14:35 UTCJul 22, 15:55 UTC1h 20m
2026-07-22 DAL2609 ATL → BOS Jul 22, 02:10 UTCJul 22, 03:15 UTC1h 5m
2026-07-21 DAL2761 DTW → MCI Jul 21, 23:00 UTCJul 22, 00:20 UTC1h 20m
2026-07-21 DAL2761 DTW → MCI Jul 21, 22:56 UTCJul 22, 00:20 UTC1h 24m
2026-07-21 DAL2761 DTW → MCI Jul 21, 20:05 UTCJul 21, 21:40 UTC1h 35m
2026-07-21 DAL3166 ATL → STL Jul 21, 16:40 UTCJul 21, 18:10 UTC1h 30m
2026-07-21 DAL3166 ATL → STL Jul 21, 14:15 UTCJul 21, 15:25 UTC1h 10m
2026-07-21 DAL1256 BOS → LGA Jul 21, 11:35 UTCJul 21, 13:00 UTC1h 25m
2026-07-21 DAL1321 DTW → RSW Jul 21, 00:10 UTCJul 21, 01:40 UTC1h 30m
2026-07-20 DAL2573 PHL → ATL Jul 20, 21:35 UTCJul 20, 22:50 UTC1h 15m
2026-07-20 DAL2573 PHL → ATL Jul 20, 18:45 UTCJul 20, 19:55 UTC1h 10m
2026-07-20 DAL1540 PHL → DTW Jul 20, 15:35 UTCJul 20, 16:45 UTC1h 10m
2026-07-20 DAL2402 - Jul 20, 01:50 UTCJul 20, 03:00 UTC1h 10m
2026-07-20 DAL2402 DTW → PHL Jul 20, 01:45 UTCJul 20, 02:59 UTC1h 14m
2026-07-19 DAL1787 IAD → DTW Jul 19, 21:52 UTCJul 19, 22:55 UTC1h 3m
2026-07-19 DAL1787 IAD → DTW Jul 19, 21:55 UTCJul 19, 23:00 UTC1h 5m
2026-07-19 DAL1787 - Jul 19, 19:25 UTCJul 19, 20:25 UTC1h 0m

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 Jul 26, 21:15 UTC.
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 DAL3051, DAL3011, DAL2157, DAL3083, DAL2718.