Apparatus

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sensors Mode-S transponder

AD4EBA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N957AT · BOEING 717-200 · operated by DELTA AIR LINES INC

Hex
AD4EBA
Octal
53247272
Decimal
11,357,882
Country
US
Tail
N957AT
Type
B712
No current signal · last broadcast 2h ago
Flights observed
674
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S AD4EBA.

Country allocation

The ICAO 24-bit address AD4EBA 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
DAL2681 Delta Air Lines 12 2026-05-26
DAL3103 Delta Air Lines 9 2026-06-01
DAL2763 Delta Air Lines 8 2026-05-19
DAL2599 - 8 2026-06-17
DAL2573 Delta Air Lines 8 2026-05-21
DAL2780 - 7 2026-06-24
DAL2730 - 7 2026-07-07
DAL2539 Delta Air Lines 7 2026-06-03
DAL2048 - 7 2026-06-20
DAL1248 - 7 2026-07-07
DAL1017 Delta Air Lines 7 2026-06-11
DAL844 Delta Air Lines 6 2026-05-15
DAL3163 Delta Air Lines 6 2026-06-12
DAL3133 - 6 2026-07-09
DAL3025 Delta Air Lines 6 2026-05-19
DAL2968 Delta Air Lines 6 2026-05-15
DAL2862 Delta Air Lines 6 2026-05-26
DAL2417 - 6 2026-06-20
DAL2157 Delta Air Lines 6 2026-06-10
DAL512 - 5 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 DAL3178 - Jul 15, 02:00 UTCJul 15, 02:50 UTC50m
2026-07-14 DAL3043 - Jul 14, 23:00 UTCJul 15, 00:15 UTC1h 15m
2026-07-14 DAL3043 MLB → ATL Jul 14, 22:58 UTCJul 15, 00:12 UTC1h 14m
2026-07-14 DAL3043 ATL → MLB Jul 14, 20:50 UTCJul 14, 21:55 UTC1h 5m
2026-07-14 DAL2179 - Jul 14, 18:40 UTCJul 14, 19:30 UTC50m
2026-07-14 DAL2179 - Jul 14, 16:40 UTCJul 14, 17:20 UTC40m
2026-07-14 DAL1149 - Jul 14, 14:30 UTCJul 14, 15:20 UTC50m
2026-07-14 DAL1577 - Jul 14, 04:00 UTCJul 14, 05:05 UTC1h 5m
2026-07-14 DAL1577 ATL → MEM Jul 14, 04:01 UTCJul 14, 05:02 UTC1h 1m
2026-07-14 DAL3053 - Jul 14, 00:00 UTCJul 14, 00:45 UTC45m
2026-07-13 DAL3053 ATL → ECP Jul 13, 22:20 UTCJul 13, 22:55 UTC35m
2026-07-13 DAL2823 - Jul 13, 20:25 UTCJul 13, 21:05 UTC40m
2026-07-13 DAL2823 - Jul 13, 17:55 UTCJul 13, 18:35 UTC40m
2026-07-13 DAL1687 - Jul 13, 15:35 UTCJul 13, 16:45 UTC1h 10m
2026-07-13 DAL1687 ATL → BTR Jul 13, 13:15 UTCJul 13, 14:20 UTC1h 5m
2026-07-13 DAL3041 - Jul 13, 10:45 UTCJul 13, 11:30 UTC45m
2026-07-13 DAL3041 JAN → ATL Jul 13, 10:35 UTCJul 13, 11:35 UTC1h 0m
2026-07-13 DAL3117 - Jul 13, 05:01 UTCJul 13, 05:45 UTC45m
2026-07-13 DAL2771 - Jul 13, 02:25 UTCJul 13, 03:40 UTC1h 15m
2026-07-12 DAL2771 ATL → XNA Jul 12, 23:35 UTCJul 13, 01:05 UTC1h 30m
2026-07-12 DAL2718 - Jul 12, 20:10 UTCJul 12, 21:15 UTC1h 5m
2026-07-12 DAL2718 - Jul 12, 17:05 UTCJul 12, 18:01 UTC55m
2026-07-12 DAL376 - Jul 12, 14:40 UTCJul 12, 15:35 UTC55m
2026-07-12 DAL376 - Jul 12, 12:20 UTCJul 12, 13:10 UTC50m
2026-07-12 DAL512 DAL → ATL Jul 12, 04:01 UTCJul 12, 05:35 UTC1h 35m
2026-07-12 DAL512 DAL → ATL Jul 12, 03:59 UTCJul 12, 05:30 UTC1h 31m
2026-07-11 DAL512 ATL → DAL Jul 11, 17:00 UTCJul 11, 18:40 UTC1h 40m
2026-07-11 DAL1158 OKC → ATL Jul 11, 14:00 UTCJul 11, 15:40 UTC1h 40m
2026-07-11 DAL2784 ATL → OKC Jul 11, 00:40 UTCJul 11, 02:20 UTC1h 40m
2026-07-10 DAL3193 - Jul 10, 22:40 UTCJul 10, 23:15 UTC35m
2026-07-10 DAL3193 CAE → ATL Jul 10, 22:36 UTCJul 10, 23:17 UTC41m
2026-07-10 DAL3193 - Jul 10, 19:05 UTCJul 10, 19:40 UTC35m
2026-07-10 DAL1737 - Jul 10, 17:20 UTCJul 10, 17:50 UTC30m
2026-07-10 DAL1737 ATL → CHA Jul 10, 15:50 UTCJul 10, 16:15 UTC25m
2026-07-10 DAL2250 - Jul 10, 13:55 UTCJul 10, 14:35 UTC40m
2026-07-10 DAL2250 ATL → BNA Jul 10, 11:50 UTCJul 10, 12:40 UTC50m
2026-07-10 DAL1959 - Jul 10, 01:50 UTCJul 10, 02:35 UTC45m
2026-07-10 DAL1959 - Jul 10, 00:15 UTCJul 10, 01:00 UTC45m
2026-07-09 DAL3133 - Jul 9, 21:35 UTCJul 9, 22:35 UTC1h 0m
2026-07-09 DAL3133 - Jul 9, 17:55 UTCJul 9, 18:45 UTC50m
2026-07-09 DAL573 - Jul 9, 16:00 UTCJul 9, 16:30 UTC30m
2026-07-09 DAL573 - Jul 9, 14:20 UTCJul 9, 14:50 UTC30m
2026-07-09 DAL1259 - Jul 9, 11:10 UTCJul 9, 12:40 UTC1h 30m
2026-07-09 DAL2043 ATL → TUL Jul 9, 02:20 UTCJul 9, 03:50 UTC1h 30m
2026-07-08 DAL3063 - Jul 8, 23:15 UTCJul 9, 00:10 UTC55m
2026-07-08 DAL3063 - Jul 8, 20:55 UTCJul 8, 21:50 UTC55m
2026-07-08 DAL1640 LAX → JFK Jul 8, 19:00 UTCJul 8, 19:45 UTC45m
2026-07-08 DAL1640 LAX → JFK Jul 8, 16:55 UTCJul 8, 17:45 UTC50m
2026-07-08 DAL376 - Jul 8, 14:45 UTCJul 8, 15:40 UTC55m
2026-07-08 DAL376 - Jul 8, 12:15 UTCJul 8, 13:10 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 N957AT page for operator, model, and routing details .

Mode-S AD4EBA frequently asked

What is Mode-S code AD4EBA?
AD4EBA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N957AT.
Where is Mode-S AD4EBA registered?
Mode-S code AD4EBA 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 AD4EBA broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD4EBA, octal 53247272, decimal 11,357,882.
What flights does AD4EBA operate?
Mode-S AD4EBA has broadcast 20 distinct callsigns, including DAL2681, DAL3103, DAL2763, DAL2599, DAL2573.