Apparatus

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sensors Mode-S transponder

A0757F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N129DU · AIRBUS A220-100 · operated by DELTA AIR LINES INC

Hex
A0757F
Octal
50072577
Decimal
10,515,839
Country
US
Tail
N129DU
Type
BCS1
No current signal · last broadcast Jul 26, 19:50 UTC
Flights observed
488
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 19:50 UTC

Last known position

Most recent position reported by Mode-S A0757F.

Country allocation

The ICAO 24-bit address A0757F 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
DAL2798 Delta Air Lines 12 2026-07-21
DAL1254 - 11 2026-07-07
DAL2456 - 10 2026-07-16
DAL1185 - 9 2026-07-22
DAL2130 - 8 2026-07-17
DAL1277 Delta Air Lines 8 2026-07-22
DAL2885 - 7 2026-07-05
DAL2679 - 7 2026-07-03
DAL2081 Delta Air Lines 7 2026-05-11
DAL1342 Delta Air Lines 7 2026-07-21
DAL1304 Delta Air Lines 7 2026-07-22
DAL1024 - 7 2026-07-11
DAL317 Delta Air Lines 6 2026-04-23
DAL2574 Delta Air Lines 6 2026-07-19
DAL1827 Delta Air Lines 6 2026-07-05
DAL1597 Delta Air Lines 6 2026-07-23
DAL1260 - 6 2026-07-10
DAL3172 - 5 2026-07-22
DAL2972 Delta Air Lines 5 2026-06-03
DAL2864 Delta Air Lines 5 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL362 LAX → OGG Jul 26, 18:05 UTCJul 26, 19:50 UTC1h 45m
2026-07-26 DAL2156 BOS → MSP Jul 26, 13:45 UTCJul 26, 16:55 UTC3h 10m
2026-07-25 DAL2087 MSP → BIL Jul 25, 20:35 UTCJul 26, 00:10 UTC3h 35m
2026-07-25 DAL2864 ATL → MKE Jul 25, 16:00 UTCJul 25, 18:25 UTC2h 25m
2026-07-25 DAL2864 ATL → MKE Jul 25, 15:57 UTCJul 25, 18:24 UTC2h 27m
2026-07-25 DAL2864 ATL → MKE Jul 25, 12:15 UTCJul 25, 14:25 UTC2h 10m
2026-07-24 DAL2113 LGA → ATL Jul 24, 23:35 UTCJul 25, 01:15 UTC1h 40m
2026-07-24 DAL2113 LGA → ATL Jul 24, 21:05 UTCJul 24, 22:25 UTC1h 20m
2026-07-24 DAL2181 GSO → ATL Jul 24, 17:50 UTCJul 24, 20:00 UTC2h 10m
2026-07-24 DAL2181 GSO → ATL Jul 24, 17:45 UTCJul 24, 19:50 UTC2h 5m
2026-07-24 DAL2181 GSO → ATL Jul 24, 14:15 UTCJul 24, 16:00 UTC1h 45m
2026-07-24 DAL1635 LGA → MIA Jul 24, 11:30 UTCJul 24, 12:30 UTC1h 0m
2026-07-24 DAL1657 BOS → DTW Jul 24, 03:10 UTCJul 24, 04:10 UTC1h 0m
2026-07-24 DAL1449 DTW → TPA Jul 24, 00:15 UTCJul 24, 01:55 UTC1h 40m
2026-07-23 DAL1449 DTW → TPA Jul 23, 21:35 UTCJul 23, 22:55 UTC1h 20m
2026-07-23 DAL2181 GSO → ATL Jul 23, 17:25 UTCJul 23, 19:35 UTC2h 10m
2026-07-23 DAL2181 GSO → ATL Jul 23, 14:20 UTCJul 23, 16:00 UTC1h 40m
2026-07-23 DAL1597 DTW → DEN Jul 23, 11:20 UTCJul 23, 12:35 UTC1h 15m
2026-07-23 DAL2666 MCO → CVG Jul 23, 03:02 UTCJul 23, 05:38 UTC2h 36m
2026-07-23 DAL2666 MCO → CVG Jul 23, 03:05 UTCJul 23, 05:40 UTC2h 35m
2026-07-23 DAL2920 MCO → BOS Jul 23, 00:45 UTCJul 23, 01:30 UTC45m
2026-07-22 DAL2920 MCO → BOS Jul 22, 22:45 UTCJul 22, 23:25 UTC40m
2026-07-22 DAL3172 ONT → SLC Jul 22, 20:10 UTCJul 22, 21:30 UTC1h 20m
2026-07-22 DAL3172 ONT → SLC Jul 22, 20:09 UTCJul 22, 21:26 UTC1h 17m
2026-07-22 DAL3172 - Jul 22, 17:45 UTCJul 22, 19:05 UTC1h 20m
2026-07-22 DAL1185 - Jul 22, 14:30 UTCJul 22, 16:00 UTC1h 30m
2026-07-22 DAL1304 DTW → SFO Jul 22, 04:04 UTCJul 22, 05:31 UTC1h 27m
2026-07-22 DAL1304 DTW → SFO Jul 22, 04:05 UTCJul 22, 05:25 UTC1h 20m
2026-07-22 DAL1277 SNA → SLC Jul 22, 00:05 UTCJul 22, 01:30 UTC1h 25m
2026-07-21 DAL1277 SNA → SLC Jul 21, 21:25 UTCJul 21, 22:50 UTC1h 25m
2026-07-21 DAL2798 EWR → MSP Jul 21, 18:00 UTCJul 21, 20:05 UTC2h 5m
2026-07-21 DAL2798 EWR → MSP Jul 21, 14:20 UTCJul 21, 16:30 UTC2h 10m
2026-07-21 DAL1342 IAH → MSP Jul 21, 00:15 UTCJul 21, 01:35 UTC1h 20m
2026-07-20 DAL1342 IAH → MSP Jul 20, 22:00 UTCJul 20, 23:15 UTC1h 15m
2026-07-20 DAL930 - Jul 20, 18:25 UTCJul 20, 20:35 UTC2h 10m
2026-07-20 DAL2667 MSP → SAT Jul 20, 14:40 UTCJul 20, 17:05 UTC2h 25m
2026-07-20 DAL2848 FLL → DTW Jul 20, 10:55 UTCJul 20, 11:45 UTC50m
2026-07-20 DAL2848 FLL → DTW Jul 20, 10:51 UTCJul 20, 13:09 UTC2h 18m
2026-07-20 DAL3075 - Jul 20, 01:30 UTCJul 20, 03:00 UTC1h 30m
2026-07-19 DAL2574 BOS → SEA Jul 19, 21:35 UTCJul 20, 00:15 UTC2h 40m
2026-07-19 DAL2574 BOS → SEA Jul 19, 18:05 UTCJul 19, 20:25 UTC2h 20m
2026-07-19 DAL2772 - Jul 19, 15:05 UTCJul 19, 16:55 UTC1h 50m
2026-07-19 DAL2772 - Jul 19, 12:25 UTCJul 19, 13:30 UTC1h 5m
2026-07-19 DAL1306 - Jul 19, 02:40 UTCJul 19, 03:45 UTC1h 5m
2026-07-19 DAL1567 MSP → ORD Jul 19, 00:40 UTCJul 19, 01:45 UTC1h 5m
2026-07-18 DAL1567 - Jul 18, 18:05 UTCJul 18, 19:00 UTC55m
2026-07-18 DAL1567 ORD → MSP Jul 18, 18:01 UTCJul 18, 19:01 UTC1h 0m
2026-07-18 DAL1567 - Jul 18, 15:30 UTCJul 18, 16:35 UTC1h 5m
2026-07-18 DAL1641 - Jul 18, 10:40 UTCJul 18, 13:00 UTC2h 20m
2026-07-18 DAL2846 MSP → EWR Jul 18, 02:09 UTCJul 18, 04:25 UTC2h 16m

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 N129DU page for operator, model, and routing details .

Mode-S A0757F frequently asked

What is Mode-S code A0757F?
A0757F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N129DU.
Where is Mode-S A0757F registered?
Mode-S code A0757F 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 A0757F broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0757F, octal 50072577, decimal 10,515,839.
What flights does A0757F operate?
Mode-S A0757F has broadcast 20 distinct callsigns, including DAL2798, DAL1254, DAL2456, DAL1185, DAL2130.