Apparatus

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sensors Mode-S transponder

A49D16

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N397DA · BOEING 737-800 · operated by DELTA AIR LINES INC

Hex
A49D16
Octal
51116426
Decimal
10,788,118
Country
US
Tail
N397DA
Type
B738
No current signal · last broadcast Jul 26, 20:25 UTC
Flights observed
439
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:25 UTC

Last known position

Most recent position reported by Mode-S A49D16.

Country allocation

The ICAO 24-bit address A49D16 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
DAL760 - 13 2026-07-22
DAL869 Delta Air Lines 9 2026-07-25
DAL1398 - 9 2026-07-01
DAL1166 Delta Air Lines 9 2026-06-21
DAL856 Delta Air Lines 8 2026-07-24
DAL776 Delta Air Lines 7 2026-07-20
DAL2770 Delta Air Lines 7 2026-07-24
DAL1399 Delta Air Lines 7 2026-07-22
DAL352 Delta Air Lines 6 2026-07-24
DAL3057 Delta Air Lines 6 2026-04-30
DAL2782 Delta Air Lines 6 2026-07-22
DAL2560 Delta Air Lines 6 2026-07-18
DAL1514 - 6 2026-06-30
DAL589 - 5 2026-07-17
DAL551 Delta Air Lines 5 2026-07-25
DAL2413 - 5 2026-07-10
DAL2406 - 5 2026-07-01
DAL2393 Delta Air Lines 5 2026-07-23
DAL1750 Delta Air Lines 5 2026-05-15
DAL1636 - 5 2026-07-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL751 MSP → SEA Jul 26, 17:10 UTCJul 26, 20:20 UTC3h 10m
2026-07-26 DAL751 MSP → SEA Jul 26, 12:05 UTCJul 26, 15:45 UTC3h 40m
2026-07-25 DAL869 SEA → DTW Jul 25, 21:20 UTCJul 26, 00:30 UTC3h 10m
2026-07-25 DAL869 SEA → DTW Jul 25, 16:55 UTCJul 25, 19:50 UTC2h 55m
2026-07-25 DAL551 ORD → LGA Jul 25, 12:30 UTCJul 25, 15:30 UTC3h 0m
2026-07-24 DAL352 JFK → LAX Jul 24, 23:15 UTCJul 25, 02:20 UTC3h 5m
2026-07-24 DAL856 DTW → IAH Jul 24, 18:30 UTCJul 24, 21:30 UTC3h 0m
2026-07-24 DAL856 DTW → IAH Jul 24, 13:45 UTCJul 24, 16:45 UTC3h 0m
2026-07-24 DAL2770 LAX → PDX Jul 24, 11:05 UTCJul 24, 11:50 UTC45m
2026-07-23 DAL1205 - Jul 23, 18:50 UTCJul 23, 21:40 UTC2h 50m
2026-07-23 DAL1245 - Jul 23, 14:00 UTCJul 23, 17:05 UTC3h 5m
2026-07-23 DAL2393 SFO → SEA Jul 23, 02:15 UTCJul 23, 03:35 UTC1h 20m
2026-07-22 DAL2782 MSY → ATL Jul 22, 22:50 UTCJul 23, 00:30 UTC1h 40m
2026-07-22 DAL760 DFW → BOS Jul 22, 17:45 UTCJul 22, 21:25 UTC3h 40m
2026-07-22 DAL760 DFW → BOS Jul 22, 17:45 UTCJul 22, 21:17 UTC3h 32m
2026-07-22 DAL760 BOS → DFW Jul 22, 12:30 UTCJul 22, 16:00 UTC3h 30m
2026-07-22 DAL1399 PHL → SLC Jul 22, 00:50 UTCJul 22, 02:50 UTC2h 0m
2026-07-21 DAL1399 PHL → SLC Jul 21, 16:00 UTCJul 21, 18:35 UTC2h 35m
2026-07-21 DAL1399 PHL → SLC Jul 21, 11:35 UTCJul 21, 14:20 UTC2h 45m
2026-07-21 DAL2393 - Jul 21, 01:35 UTCJul 21, 03:05 UTC1h 30m
2026-07-20 DAL2782 BOS → RDU Jul 20, 21:50 UTCJul 20, 23:30 UTC1h 40m
2026-07-20 DAL760 DFW → BOS Jul 20, 16:35 UTCJul 20, 20:00 UTC3h 25m
2026-07-20 DAL760 BOS → DFW Jul 20, 11:40 UTCJul 20, 14:55 UTC3h 15m
2026-07-20 DAL776 BOS → DEN Jul 20, 00:55 UTCJul 20, 04:05 UTC3h 10m
2026-07-20 DAL776 BOS → DEN Jul 20, 00:50 UTCJul 20, 04:02 UTC3h 12m
2026-07-19 DAL776 BOS → DEN Jul 19, 20:30 UTCJul 19, 23:35 UTC3h 5m
2026-07-19 DAL2570 CLT → MSP Jul 19, 15:40 UTCJul 19, 17:25 UTC1h 45m
2026-07-19 DAL2570 CLT → MSP Jul 19, 11:50 UTCJul 19, 14:15 UTC2h 25m
2026-07-18 DAL1328 CVG → BOS Jul 18, 19:50 UTCJul 18, 22:55 UTC3h 5m
2026-07-18 DAL1328 CVG → BOS Jul 18, 19:51 UTCJul 18, 22:53 UTC3h 2m
2026-07-18 DAL2100 - Jul 18, 15:40 UTCJul 18, 18:40 UTC3h 0m
2026-07-18 DAL2100 SLC → MSY Jul 18, 15:38 UTCJul 18, 18:45 UTC3h 7m
2026-07-18 DAL1650 - Jul 18, 12:40 UTCJul 18, 13:35 UTC55m
2026-07-18 DAL2560 ATL → BDL Jul 18, 00:35 UTCJul 18, 03:30 UTC2h 56m
2026-07-17 DAL2912 ATL → MSP Jul 17, 21:55 UTCJul 17, 23:10 UTC1h 15m
2026-07-17 DAL3134 ATL → IND Jul 17, 19:09 UTCJul 17, 20:20 UTC1h 10m
2026-07-17 DAL590 - Jul 17, 13:50 UTCJul 17, 16:40 UTC2h 50m
2026-07-17 DAL589 ATL → MEX Jul 17, 00:45 UTCJul 17, 03:37 UTC2h 52m
2026-07-17 DAL589 - Jul 17, 00:45 UTCJul 17, 01:29 UTC45m
2026-07-16 DAL590 - Jul 16, 14:00 UTCJul 16, 16:44 UTC2h 45m
2026-07-16 DAL589 - Jul 16, 00:30 UTCJul 16, 03:35 UTC3h 5m
2026-07-15 DAL3138 - Jul 15, 20:45 UTCJul 15, 22:00 UTC1h 15m
2026-07-15 DAL3138 IND → ATL Jul 15, 20:43 UTCJul 15, 21:56 UTC1h 13m
2026-07-15 DAL2910 MSP → IND Jul 15, 18:05 UTCJul 15, 19:20 UTC1h 15m
2026-07-15 DAL2987 - Jul 15, 14:00 UTCJul 15, 16:45 UTC2h 45m
2026-07-14 DAL2560 - Jul 14, 23:35 UTCJul 15, 01:55 UTC2h 20m
2026-07-14 DAL2912 IND → MSP Jul 14, 20:20 UTCJul 14, 21:35 UTC1h 15m
2026-07-14 DAL3134 ATL → IND Jul 14, 18:00 UTCJul 14, 19:05 UTC1h 5m
2026-07-14 DAL3048 - Jul 14, 14:15 UTCJul 14, 14:55 UTC40m
2026-07-14 DAL3048 ATL → ECP Jul 14, 12:25 UTCJul 14, 13:05 UTC40m

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 N397DA page for operator, model, and routing details .

Mode-S A49D16 frequently asked

What is Mode-S code A49D16?
A49D16 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N397DA.
Where is Mode-S A49D16 registered?
Mode-S code A49D16 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 A49D16 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A49D16, octal 51116426, decimal 10,788,118.
What flights does A49D16 operate?
Mode-S A49D16 has broadcast 20 distinct callsigns, including DAL760, DAL869, DAL1398, DAL1166, DAL856.