Apparatus

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sensors Mode-S transponder

ACAD53

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N916DU · BOEING 737-900 · operated by DELTA AIR LINES INC

Hex
ACAD53
Octal
53126523
Decimal
11,316,563
Country
US
Tail
N916DU
Type
B739
No current signal · last broadcast 41m ago
Flights observed
468
Distinct callsigns
20
Country
US
Last broadcast
41m ago

Last known position

Most recent position reported by Mode-S ACAD53.

Country allocation

The ICAO 24-bit address ACAD53 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
DAL2300 - 9 2026-07-04
DAL1757 Delta Air Lines 9 2026-06-11
DAL1913 - 8 2026-06-20
DAL1419 - 8 2026-07-05
DAL2129 Delta Air Lines 6 2026-06-16
DAL1004 - 6 2026-07-07
DAL1271 Delta Air Lines 5 2026-06-05
DAL640 Delta Air Lines 4 2026-06-13
DAL3169 Delta Air Lines 4 2026-06-08
DAL3126 Delta Air Lines 4 2026-06-28
DAL3100 - 4 2026-07-12
DAL2998 Delta Air Lines 4 2026-05-30
DAL2997 - 4 2026-07-08
DAL2913 Delta Air Lines 4 2026-05-11
DAL2531 Delta Air Lines 4 2026-07-03
DAL2312 Delta Air Lines 4 2026-05-27
DAL1870 - 4 2026-07-11
DAL1468 Delta Air Lines 4 2026-05-19
DAL1422 Delta Air Lines 4 2026-07-01
DAL1178 Delta Air Lines 4 2026-06-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 DAL1652 - Jul 14, 18:30 UTCJul 14, 20:40 UTC2h 10m
2026-07-14 DAL772 - Jul 14, 12:50 UTCJul 14, 16:45 UTC3h 55m
2026-07-14 DAL772 SFO → DTW Jul 14, 12:48 UTCJul 14, 16:56 UTC4h 8m
2026-07-14 DAL2197 - Jul 14, 05:50 UTCJul 14, 06:40 UTC50m
2026-07-14 DAL2096 MSY → LAX Jul 14, 00:00 UTCJul 14, 03:45 UTC3h 45m
2026-07-13 DAL2096 MSY → LAX Jul 13, 23:58 UTCJul 14, 03:27 UTC3h 29m
2026-07-13 DAL2096 - Jul 13, 18:40 UTCJul 13, 22:25 UTC3h 45m
2026-07-13 DAL891 - Jul 13, 13:20 UTCJul 13, 16:45 UTC3h 25m
2026-07-13 DAL790 - Jul 13, 02:50 UTCJul 13, 03:30 UTC40m
2026-07-12 DAL1002 - Jul 12, 20:45 UTCJul 12, 23:40 UTC2h 55m
2026-07-12 DAL1002 - Jul 12, 16:30 UTCJul 12, 18:55 UTC2h 25m
2026-07-12 DAL3100 - Jul 12, 14:40 UTCJul 12, 15:15 UTC35m
2026-07-12 DAL3100 - Jul 12, 12:45 UTCJul 12, 13:10 UTC25m
2026-07-12 DAL2734 - Jul 12, 09:50 UTCJul 12, 11:10 UTC1h 20m
2026-07-11 DAL2750 ATL → CLE Jul 11, 22:52 UTCJul 12, 00:13 UTC1h 21m
2026-07-11 DAL2750 ATL → CLE Jul 11, 22:55 UTCJul 12, 00:15 UTC1h 20m
2026-07-11 DAL1870 GCM → ATL Jul 11, 18:02 UTCJul 11, 21:05 UTC3h 3m
2026-07-11 DAL1870 ATL → ATL Jul 11, 14:35 UTCJul 11, 21:10 UTC6h 35m
2026-07-11 DAL1364 ORF → ATL Jul 11, 11:25 UTCJul 11, 12:40 UTC1h 15m
2026-07-11 DAL1364 ORF → ATL Jul 11, 11:21 UTCJul 11, 12:38 UTC1h 17m
2026-07-11 DAL2984 ATL → ORF Jul 11, 00:35 UTCJul 11, 01:50 UTC1h 15m
2026-07-10 DAL2545 - Jul 10, 20:35 UTCJul 10, 22:25 UTC1h 50m
2026-07-10 DAL2545 - Jul 10, 17:50 UTCJul 10, 19:15 UTC1h 25m
2026-07-10 DAL1500 - Jul 10, 14:25 UTCJul 10, 15:40 UTC1h 15m
2026-07-10 DAL1500 ATL → CLE Jul 10, 11:40 UTCJul 10, 13:00 UTC1h 20m
2026-07-10 DAL1109 ABQ → ATL Jul 10, 05:35 UTCJul 10, 08:10 UTC2h 35m
2026-07-10 DAL1109 ATL → ABQ Jul 10, 01:35 UTCJul 10, 04:05 UTC2h 30m
2026-07-09 DAL1400 STL → ATL Jul 9, 16:10 UTCJul 9, 17:20 UTC1h 10m
2026-07-09 DAL1400 ATL → STL Jul 9, 13:40 UTCJul 9, 14:55 UTC1h 15m
2026-07-09 DAL1192 - Jul 9, 10:30 UTCJul 9, 11:30 UTC1h 0m
2026-07-08 DAL1518 ATL → RDU Jul 8, 23:55 UTCJul 9, 00:55 UTC1h 0m
2026-07-08 DAL1381 - Jul 8, 21:45 UTCJul 8, 22:35 UTC50m
2026-07-08 DAL1381 - Jul 8, 18:50 UTCJul 8, 19:30 UTC40m
2026-07-08 DAL1424 - Jul 8, 15:40 UTCJul 8, 16:45 UTC1h 5m
2026-07-08 DAL1424 ATL → MSY Jul 8, 13:10 UTCJul 8, 14:15 UTC1h 5m
2026-07-08 DAL1499 - Jul 8, 10:05 UTCJul 8, 11:20 UTC1h 15m
2026-07-08 DAL2997 ATL → SRQ Jul 8, 05:15 UTCJul 8, 06:15 UTC1h 0m
2026-07-08 DAL2997 ATL → SRQ Jul 8, 05:12 UTCJul 8, 06:15 UTC1h 3m
2026-07-08 DAL3132 MSY → ATL Jul 8, 03:05 UTCJul 8, 04:10 UTC1h 5m
2026-07-07 DAL3132 ATL → MSY Jul 7, 21:55 UTCJul 7, 23:05 UTC1h 10m
2026-07-07 DAL1004 ABQ → ATL Jul 7, 17:35 UTCJul 7, 20:20 UTC2h 45m
2026-07-07 DAL1004 ATL → ABQ Jul 7, 13:20 UTCJul 7, 15:55 UTC2h 35m
2026-07-07 DAL1499 - Jul 7, 10:15 UTCJul 7, 11:25 UTC1h 10m
2026-07-07 DAL2997 ATL → SRQ Jul 7, 04:40 UTCJul 7, 05:45 UTC1h 5m
2026-07-07 DAL2997 ATL → SRQ Jul 7, 04:38 UTCJul 7, 05:41 UTC1h 3m
2026-07-07 DAL3112 - Jul 7, 02:45 UTCJul 7, 03:20 UTC35m
2026-07-07 DAL3112 - Jul 7, 00:45 UTCJul 7, 01:25 UTC40m
2026-07-06 DAL3112 - Jul 6, 21:50 UTCJul 6, 23:20 UTC1h 30m
2026-07-06 DAL1029 JFK → ATL Jul 6, 16:55 UTCJul 6, 18:50 UTC1h 55m
2026-07-06 DAL1316 - Jul 6, 12:40 UTCJul 6, 13:50 UTC1h 10m

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 N916DU page for operator, model, and routing details .

Mode-S ACAD53 frequently asked

What is Mode-S code ACAD53?
ACAD53 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N916DU.
Where is Mode-S ACAD53 registered?
Mode-S code ACAD53 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 ACAD53 broadcasting right now?
No active broadcast right now. Last signal was 41m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACAD53, octal 53126523, decimal 11,316,563.
What flights does ACAD53 operate?
Mode-S ACAD53 has broadcast 20 distinct callsigns, including DAL2300, DAL1757, DAL1913, DAL1419, DAL2129.