Apparatus

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sensors Mode-S transponder

A042DB

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N116DU · AIRBUS A220-100 · operated by DELTA AIR LINES INC

Hex
A042DB
Octal
50041333
Decimal
10,502,875
Country
US
Tail
N116DU
Type
BCS1
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
511
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S A042DB.

Country allocation

The ICAO 24-bit address A042DB 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
DAL2866 Delta Air Lines 14 2026-07-04
DAL2903 - 13 2026-07-12
DAL1342 Delta Air Lines 12 2026-07-24
DAL1198 - 12 2026-07-12
DAL1367 - 11 2026-07-18
DAL1035 Delta Air Lines 11 2026-07-26
DAL2971 Delta Air Lines 10 2026-04-24
DAL2327 - 10 2026-06-24
DAL1503 Delta Air Lines 10 2026-07-21
DAL2141 Delta Air Lines 9 2026-06-02
DAL2667 - 8 2026-07-22
DAL2528 Delta Air Lines 8 2026-07-24
DAL1623 Delta Air Lines 8 2026-07-18
DAL1020 Delta Air Lines 8 2026-06-02
DAL930 - 7 2026-07-22
DAL454 Delta Air Lines 7 2026-07-26
DAL3123 Delta Air Lines 7 2026-07-24
DAL2819 - 7 2026-07-13
DAL2680 - 7 2026-06-14
DAL2656 Delta Air Lines 7 2026-04-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL1035 BOS → JFK Jul 26, 21:50 UTCJul 26, 22:45 UTC55m
2026-07-26 DAL1035 BOS → JFK Jul 26, 18:10 UTCJul 26, 20:15 UTC2h 5m
2026-07-26 DAL454 LAX → BOS Jul 26, 13:25 UTCJul 26, 16:40 UTC3h 15m
2026-07-26 DAL454 LAX → BOS Jul 26, 12:00 UTCJul 26, 12:05 UTC5m
2026-07-25 DAL496 JFK → DFW Jul 25, 22:35 UTCJul 26, 01:35 UTC3h 0m
2026-07-25 DAL2661 LEX → ATL Jul 25, 18:25 UTCJul 25, 20:40 UTC2h 15m
2026-07-25 DAL2661 LEX → ATL Jul 25, 18:21 UTCJul 25, 20:36 UTC2h 15m
2026-07-25 DAL2446 JFK → JAX Jul 25, 15:15 UTCJul 25, 16:10 UTC55m
2026-07-24 DAL2307 ATL → GSO Jul 24, 23:30 UTCJul 25, 00:20 UTC50m
2026-07-24 DAL2528 MSY → ATL Jul 24, 19:50 UTCJul 24, 22:20 UTC2h 30m
2026-07-24 DAL2528 MSY → ATL Jul 24, 19:48 UTCJul 24, 22:13 UTC2h 25m
2026-07-24 DAL3123 DTW → MEM Jul 24, 16:15 UTCJul 24, 18:30 UTC2h 15m
2026-07-24 DAL1314 SJC → SLC Jul 24, 13:10 UTCJul 24, 14:30 UTC1h 20m
2026-07-24 DAL1272 JFK → FLL Jul 24, 04:55 UTCJul 24, 06:25 UTC1h 30m
2026-07-24 DAL1342 IAH → MSP Jul 24, 00:15 UTCJul 24, 01:30 UTC1h 15m
2026-07-24 DAL1342 IAH → MSP Jul 24, 00:12 UTCJul 24, 01:25 UTC1h 13m
2026-07-23 DAL1342 IAH → MSP Jul 23, 21:45 UTCJul 23, 23:00 UTC1h 15m
2026-07-23 DAL1342 IAH → MSP Jul 23, 00:30 UTCJul 23, 01:50 UTC1h 20m
2026-07-22 DAL1342 IAH → MSP Jul 22, 22:00 UTCJul 22, 23:20 UTC1h 20m
2026-07-22 DAL930 - Jul 22, 18:05 UTCJul 22, 20:30 UTC2h 25m
2026-07-22 DAL2667 - Jul 22, 14:30 UTCJul 22, 16:45 UTC2h 15m
2026-07-22 DAL1597 DTW → DEN Jul 22, 11:30 UTCJul 22, 12:40 UTC1h 10m
2026-07-22 DAL2666 MCO → CVG Jul 22, 04:00 UTCJul 22, 06:23 UTC2h 23m
2026-07-22 DAL2666 MCO → CVG Jul 22, 04:00 UTCJul 22, 05:25 UTC1h 25m
2026-07-22 DAL1260 MCO → LGA Jul 22, 00:25 UTCJul 22, 01:55 UTC1h 30m
2026-07-22 DAL1260 MCO → LGA Jul 22, 00:24 UTCJul 22, 01:52 UTC1h 28m
2026-07-21 DAL1260 MCO → LGA Jul 21, 21:20 UTCJul 21, 22:50 UTC1h 30m
2026-07-21 DAL1442 CMH → ATL Jul 21, 19:20 UTCJul 21, 20:10 UTC50m
2026-07-21 DAL1442 CMH → ATL Jul 21, 17:15 UTCJul 21, 18:00 UTC45m
2026-07-21 DAL1185 - Jul 21, 14:35 UTCJul 21, 16:05 UTC1h 30m
2026-07-21 DAL1304 DTW → SFO Jul 21, 03:25 UTCJul 21, 04:45 UTC1h 20m
2026-07-21 DAL1503 JFK → ATL Jul 21, 00:10 UTCJul 21, 01:35 UTC1h 25m
2026-07-20 DAL1503 JFK → ATL Jul 20, 21:30 UTCJul 20, 22:45 UTC1h 15m
2026-07-20 DAL1553 JFK → TPA Jul 20, 19:05 UTCJul 20, 20:15 UTC1h 10m
2026-07-20 DAL1553 JFK → TPA Jul 20, 19:05 UTCJul 20, 20:04 UTC59m
2026-07-20 DAL1553 JFK → TPA Jul 20, 16:30 UTCJul 20, 17:30 UTC1h 0m
2026-07-20 DAL2716 - Jul 20, 12:05 UTCJul 20, 15:00 UTC2h 55m
2026-07-20 DAL2619 ATL → LGA Jul 20, 00:05 UTCJul 20, 02:40 UTC2h 35m
2026-07-19 DAL1532 - Jul 19, 19:40 UTCJul 19, 22:10 UTC2h 30m
2026-07-19 DAL2502 ATL → BNA Jul 19, 15:44 UTCJul 19, 18:24 UTC2h 40m
2026-07-19 DAL2502 ATL → BNA Jul 19, 15:45 UTCJul 19, 18:25 UTC2h 40m
2026-07-19 DAL2544 - Jul 19, 11:55 UTCJul 19, 12:55 UTC1h 0m
2026-07-19 DAL2544 DEN → SLC Jul 19, 11:50 UTCJul 19, 12:53 UTC1h 3m
2026-07-19 DAL1586 SLC → DEN Jul 19, 00:36 UTCJul 19, 01:38 UTC1h 2m
2026-07-18 DAL1623 ATL → SJC Jul 18, 22:20 UTCJul 18, 23:20 UTC1h 0m
2026-07-18 DAL1623 ATL → SJC Jul 18, 19:40 UTCJul 18, 20:40 UTC1h 0m
2026-07-18 DAL1367 - Jul 18, 16:50 UTCJul 18, 18:05 UTC1h 15m
2026-07-18 DAL1367 SLC → SMF Jul 18, 14:20 UTCJul 18, 15:40 UTC1h 20m
2026-07-18 DAL2201 - Jul 18, 11:50 UTCJul 18, 13:00 UTC1h 10m
2026-07-18 DAL1464 OMA → ATL Jul 18, 03:25 UTCJul 18, 04:25 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 N116DU page for operator, model, and routing details .

Mode-S A042DB frequently asked

What is Mode-S code A042DB?
A042DB is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N116DU.
Where is Mode-S A042DB registered?
Mode-S code A042DB 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 A042DB broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A042DB, octal 50041333, decimal 10,502,875.
What flights does A042DB operate?
Mode-S A042DB has broadcast 20 distinct callsigns, including DAL2866, DAL2903, DAL1342, DAL1198, DAL1367.