Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A44943

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N3754A · BOEING 737-800 · operated by DELTA AIR LINES INC

Hex
A44943
Octal
51044503
Decimal
10,766,659
Country
US
Tail
N3754A
Type
B738
No current signal · last broadcast Jul 26, 21:25 UTC
Flights observed
488
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:25 UTC

Last known position

Most recent position reported by Mode-S A44943.

Country allocation

The ICAO 24-bit address A44943 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
DAL1166 Delta Air Lines 18 2026-07-26
DAL2776 - 9 2026-07-12
DAL661 - 8 2026-07-16
DAL2623 Delta Air Lines 8 2026-07-21
DAL1245 - 8 2026-07-10
DAL758 Delta Air Lines 7 2026-07-21
DAL511 Delta Air Lines 7 2026-06-08
DAL2671 Delta Air Lines 7 2026-06-12
DAL2572 - 7 2026-07-01
DAL1439 Delta Air Lines 6 2026-06-01
DAL710 - 5 2026-07-03
DAL457 Delta Air Lines 5 2026-06-05
DAL3150 Delta Air Lines 5 2026-05-05
DAL2880 - 5 2026-06-16
DAL2706 - 5 2026-04-13
DAL2477 - 5 2026-07-20
DAL2468 Delta Air Lines 5 2026-07-20
DAL2149 - 5 2026-06-29
DAL1607 - 5 2026-06-21
DAL1398 Delta Air Lines 5 2026-06-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL1166 LGA → MCO Jul 26, 17:50 UTCJul 26, 21:25 UTC3h 35m
2026-07-26 DAL1166 LGA → MCO Jul 26, 13:05 UTCJul 26, 16:15 UTC3h 10m
2026-07-26 DAL2101 TPA → LGA Jul 26, 01:45 UTCJul 26, 03:35 UTC1h 50m
2026-07-25 DAL3013 ATL → IND Jul 25, 20:50 UTCJul 25, 22:00 UTC1h 10m
2026-07-25 DAL3013 ATL → IND Jul 25, 20:49 UTCJul 25, 22:08 UTC1h 19m
2026-07-25 DAL3134 ATL → IND Jul 25, 18:10 UTCJul 25, 19:15 UTC1h 5m
2026-07-25 DAL609 CUN → ATL Jul 25, 13:10 UTCJul 25, 15:15 UTC2h 5m
2026-07-24 DAL1939 ATL → CUN Jul 24, 23:30 UTCJul 25, 01:35 UTC2h 5m
2026-07-24 DAL3060 GSO → ATL Jul 24, 20:40 UTCJul 24, 21:30 UTC50m
2026-07-24 DAL3060 GSO → ATL Jul 24, 17:15 UTCJul 24, 18:05 UTC50m
2026-07-24 DAL2232 DTW → GSP Jul 24, 14:25 UTCJul 24, 15:25 UTC1h 0m
2026-07-24 DAL2232 DTW → GSP Jul 24, 12:05 UTCJul 24, 12:50 UTC45m
2026-07-22 DAL9936 JFK → ATL Jul 22, 13:40 UTCJul 22, 14:50 UTC1h 10m
2026-07-22 DAL1636 SLC → AUS Jul 22, 00:30 UTCJul 22, 03:15 UTC2h 45m
2026-07-21 DAL2623 IND → ATL Jul 21, 16:25 UTCJul 21, 19:00 UTC2h 35m
2026-07-21 DAL2018 MSP → RDU Jul 21, 11:50 UTCJul 21, 14:05 UTC2h 15m
2026-07-21 DAL758 SLC → BOS Jul 21, 06:30 UTCJul 21, 09:30 UTC3h 0m
2026-07-21 DAL1667 ATL → BOS Jul 21, 03:45 UTCJul 21, 04:45 UTC1h 0m
2026-07-20 DAL2468 BOS → JFK Jul 20, 22:18 UTCJul 21, 02:13 UTC3h 55m
2026-07-20 DAL2468 BOS → JFK Jul 20, 22:20 UTCJul 21, 02:20 UTC3h 59m
2026-07-20 DAL2477 SLC → YYZ Jul 20, 17:20 UTCJul 20, 20:35 UTC3h 15m
2026-07-20 DAL2477 SLC → YYZ Jul 20, 17:20 UTCJul 20, 20:33 UTC3h 13m
2026-07-20 DAL2142 MSP → PHX Jul 20, 12:15 UTCJul 20, 15:30 UTC3h 15m
2026-07-20 DAL1459 ATL → CMH Jul 20, 03:30 UTCJul 20, 04:40 UTC1h 10m
2026-07-19 DAL1941 ATL → ATL Jul 19, 17:00 UTCJul 20, 01:05 UTC8h 5m
2026-07-19 DAL985 JFK → PHX Jul 19, 14:35 UTCJul 19, 15:15 UTC40m
2026-07-18 DAL985 JFK → PHX Jul 18, 19:55 UTCJul 18, 23:45 UTC3h 50m
2026-07-18 DAL984 ATL → CTG Jul 18, 15:05 UTCJul 18, 18:35 UTC3h 30m
2026-07-18 DAL1264 ATL → HNL Jul 18, 10:40 UTCJul 18, 12:05 UTC1h 25m
2026-07-17 DAL2377 - Jul 17, 22:20 UTCJul 18, 01:00 UTC2h 40m
2026-07-17 DAL1971 BZN → SLC Jul 17, 18:25 UTCJul 17, 19:21 UTC56m
2026-07-17 DAL1971 - Jul 17, 16:24 UTCJul 17, 16:55 UTC30m
2026-07-17 DAL2876 - Jul 17, 11:20 UTCJul 17, 14:24 UTC3h 5m
2026-07-17 DAL2876 CVG → SLC Jul 17, 11:19 UTCJul 17, 14:23 UTC3h 4m
2026-07-16 DAL661 - Jul 16, 23:40 UTCJul 17, 01:39 UTC2h 0m
2026-07-16 DAL661 - Jul 16, 20:25 UTCJul 16, 22:30 UTC2h 5m
2026-07-16 DAL2774 - Jul 16, 16:35 UTCJul 16, 18:29 UTC1h 55m
2026-07-16 DAL1401 BOS → FLL Jul 16, 12:09 UTCJul 16, 14:50 UTC2h 40m
2026-07-15 DAL626 CUN → BOS Jul 15, 18:40 UTCJul 15, 22:45 UTC4h 5m
2026-07-15 DAL627 BOS → CUN Jul 15, 13:30 UTCJul 15, 17:20 UTC3h 50m
2026-07-15 DAL522 - Jul 15, 00:50 UTCJul 15, 03:40 UTC2h 50m
2026-07-14 DAL2321 LGA → FLL Jul 14, 20:40 UTCJul 14, 23:00 UTC2h 19m
2026-07-14 DAL873 DFW → LGA Jul 14, 15:50 UTCJul 14, 19:00 UTC3h 10m
2026-07-14 DAL873 LGA → DFW Jul 14, 11:10 UTCJul 14, 14:00 UTC2h 50m
2026-07-14 DAL846 DFW → LGA Jul 14, 01:50 UTCJul 14, 05:00 UTC3h 10m
2026-07-13 DAL846 LGA → DFW Jul 13, 20:00 UTCJul 13, 23:00 UTC3h 0m
2026-07-13 DAL379 RSW → LGA Jul 13, 15:50 UTCJul 13, 18:20 UTC2h 30m
2026-07-13 DAL379 LGA → RSW Jul 13, 11:30 UTCJul 13, 14:10 UTC2h 40m
2026-07-13 DAL701 - Jul 13, 01:05 UTCJul 13, 03:40 UTC2h 35m
2026-07-13 DAL701 FLL → LGA Jul 13, 01:02 UTCJul 13, 03:33 UTC2h 31m

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 N3754A page for operator, model, and routing details .

Mode-S A44943 frequently asked

What is Mode-S code A44943?
A44943 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N3754A.
Where is Mode-S A44943 registered?
Mode-S code A44943 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 A44943 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A44943, octal 51044503, decimal 10,766,659.
What flights does A44943 operate?
Mode-S A44943 has broadcast 20 distinct callsigns, including DAL1166, DAL2776, DAL661, DAL2623, DAL1245.