Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A442F3

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N374DA · BOEING 737-800 · operated by DELTA AIR LINES INC

Hex
A442F3
Octal
51041363
Decimal
10,765,043
Country
US
Tail
N374DA
Type
B738
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
429
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S A442F3.

Country allocation

The ICAO 24-bit address A442F3 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
DAL2897 Delta Air Lines 6 2026-05-19
DAL2444 Delta Air Lines 6 2026-05-10
DAL1607 - 6 2026-07-02
DAL661 Delta Air Lines 5 2026-05-19
DAL2993 Delta Air Lines 5 2026-05-19
DAL2606 - 5 2026-07-14
DAL2572 Delta Air Lines 5 2026-05-22
DAL2197 Delta Air Lines 5 2026-05-03
DAL2149 - 5 2026-07-16
DAL2100 - 5 2026-06-19
DAL1984 - 5 2026-07-08
DAL1188 Delta Air Lines 5 2026-05-18
DAL577 Delta Air Lines 4 2026-06-07
DAL2905 Delta Air Lines 4 2026-04-25
DAL2698 Delta Air Lines 4 2026-05-10
DAL2585 Delta Air Lines 4 2026-04-23
DAL2419 - 4 2026-07-16
DAL1650 - 4 2026-06-19
DAL1595 Delta Air Lines 4 2026-05-12
DAL1421 - 4 2026-06-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL1738 JFK → PBI Jul 26, 21:25 UTCJul 26, 22:40 UTC1h 15m
2026-07-26 DAL678 LAX → JFK Jul 26, 16:40 UTCJul 26, 19:55 UTC3h 15m
2026-07-26 DAL3160 CVG → ATL Jul 26, 14:10 UTCJul 26, 15:10 UTC1h 0m
2026-07-26 DAL2909 CMH → ATL Jul 26, 11:15 UTCJul 26, 12:15 UTC1h 0m
2026-07-25 DAL2786 LGA → DTW Jul 25, 22:00 UTCJul 25, 23:35 UTC1h 35m
2026-07-17 DAL677 - Jul 17, 22:45 UTCJul 17, 23:10 UTC25m
2026-07-17 DAL677 - Jul 17, 14:30 UTCJul 17, 18:44 UTC4h 15m
2026-07-17 DAL2955 SEA → LAS Jul 17, 00:30 UTCJul 17, 02:39 UTC2h 10m
2026-07-16 DAL2419 PHX → SEA Jul 16, 19:55 UTCJul 16, 22:30 UTC2h 35m
2026-07-16 DAL2419 SEA → PHX Jul 16, 16:05 UTCJul 16, 18:50 UTC2h 45m
2026-07-16 DAL2998 SLC → SEA Jul 16, 04:55 UTCJul 16, 06:25 UTC1h 30m
2026-07-16 DAL2149 - Jul 16, 00:10 UTCJul 16, 03:15 UTC3h 5m
2026-07-15 DAL2149 SLC → CVG Jul 15, 20:00 UTCJul 15, 23:00 UTC3h 0m
2026-07-15 DAL1016 SEA → SLC Jul 15, 16:55 UTCJul 15, 18:35 UTC1h 40m
2026-07-15 DAL780 AUS → SEA Jul 15, 11:25 UTCJul 15, 15:00 UTC3h 35m
2026-07-15 DAL848 SEA → AUS Jul 15, 01:05 UTCJul 15, 04:35 UTC3h 30m
2026-07-14 DAL2606 - Jul 14, 21:10 UTCJul 14, 23:00 UTC1h 49m
2026-07-14 DAL2606 LAX → SEA Jul 14, 21:07 UTCJul 14, 22:59 UTC1h 52m
2026-07-14 DAL2769 SEA → LAX Jul 14, 17:30 UTCJul 14, 19:55 UTC2h 25m
2026-07-14 DAL2874 SLC → SEA Jul 14, 14:15 UTCJul 14, 15:50 UTC1h 35m
2026-07-14 DAL2874 SLC → SEA Jul 14, 14:15 UTCJul 14, 15:45 UTC1h 30m
2026-07-14 DAL1239 SEA → SLC Jul 14, 03:40 UTCJul 14, 05:15 UTC1h 35m
2026-07-13 DAL2606 - Jul 13, 21:50 UTCJul 13, 23:50 UTC2h 0m
2026-07-13 DAL2085 - Jul 13, 13:05 UTCJul 13, 16:30 UTC3h 25m
2026-07-13 DAL2154 - Jul 13, 02:50 UTCJul 13, 06:15 UTC3h 25m
2026-07-13 DAL2120 LAS → LAX Jul 13, 00:55 UTCJul 13, 01:40 UTC45m
2026-07-12 DAL2120 - Jul 12, 22:50 UTCJul 12, 23:35 UTC45m
2026-07-12 DAL1696 LAS → LAX Jul 12, 20:50 UTCJul 12, 21:30 UTC40m
2026-07-12 DAL1696 - Jul 12, 18:20 UTCJul 12, 19:05 UTC45m
2026-07-12 DAL1556 - Jul 12, 12:40 UTCJul 12, 16:15 UTC3h 35m
2026-07-12 DAL1199 ATL → ORD Jul 12, 03:20 UTCJul 12, 05:01 UTC1h 40m
2026-07-11 DAL2767 - Jul 11, 21:15 UTCJul 12, 00:45 UTC3h 30m
2026-07-11 DAL2767 - Jul 11, 20:25 UTCJul 11, 20:35 UTC10m
2026-07-11 DAL2767 - Jul 11, 13:55 UTCJul 11, 17:15 UTC3h 20m
2026-07-11 DAL2469 CMH → ATL Jul 11, 10:05 UTCJul 11, 11:15 UTC1h 10m
2026-07-11 DAL2469 CMH → ATL Jul 11, 10:05 UTCJul 11, 11:10 UTC1h 5m
2026-07-11 DAL1459 ATL → CMH Jul 11, 02:15 UTCJul 11, 03:25 UTC1h 10m
2026-07-10 DAL880 - Jul 10, 23:35 UTCJul 11, 00:50 UTC1h 15m
2026-07-10 DAL880 CLE → ATL Jul 10, 23:31 UTCJul 11, 00:47 UTC1h 16m
2026-07-10 DAL880 ATL → CLE Jul 10, 20:10 UTCJul 10, 21:45 UTC1h 35m
2026-07-10 DAL1522 - Jul 10, 17:15 UTCJul 10, 18:25 UTC1h 10m
2026-07-10 DAL1522 ATL → CMH Jul 10, 14:20 UTCJul 10, 15:25 UTC1h 5m
2026-07-10 DAL2124 - Jul 10, 10:30 UTCJul 10, 11:10 UTC40m
2026-07-10 DAL2525 - Jul 10, 05:15 UTCJul 10, 05:55 UTC40m
2026-07-10 DAL1758 - Jul 10, 02:25 UTCJul 10, 03:45 UTC1h 20m
2026-07-10 DAL1758 MIA → ATL Jul 10, 02:21 UTCJul 10, 03:41 UTC1h 20m
2026-07-09 DAL1758 - Jul 9, 23:00 UTCJul 10, 01:05 UTC2h 5m
2026-07-09 DAL1759 - Jul 9, 14:15 UTCJul 9, 16:45 UTC2h 30m
2026-07-09 DAL1759 ATL → PTY Jul 9, 14:15 UTCJul 9, 17:51 UTC3h 36m
2026-07-09 DAL1184 OKC → ATL Jul 9, 10:50 UTCJul 9, 12:35 UTC1h 45m

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 N374DA page for operator, model, and routing details .

Mode-S A442F3 frequently asked

What is Mode-S code A442F3?
A442F3 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N374DA.
Where is Mode-S A442F3 registered?
Mode-S code A442F3 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 A442F3 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 A442F3, octal 51041363, decimal 10,765,043.
What flights does A442F3 operate?
Mode-S A442F3 has broadcast 20 distinct callsigns, including DAL2897, DAL2444, DAL1607, DAL661, DAL2993.