Apparatus

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sensors Mode-S transponder

A05F37

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N123DW · AIRBUS A-321 · operated by DELTA AIR LINES INC

Hex
A05F37
Octal
50057467
Decimal
10,510,135
Country
US
Tail
N123DW
Type
A321
Broadcasting now · callsign DAL302 · 11,875 ft
Flights observed
543
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:45 UTC

Current position

A05F37 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A05F37 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
DAL994 - 7 2026-07-15
DAL706 - 7 2026-07-19
DAL557 - 7 2026-07-15
DAL754 - 6 2026-07-13
DAL371 Delta Air Lines 6 2026-06-20
DAL2836 - 6 2026-06-28
DAL2532 Delta Air Lines 6 2026-04-14
DAL1642 - 6 2026-06-28
DAL1461 - 6 2026-07-21
DAL990 Delta Air Lines 5 2026-07-23
DAL989 Delta Air Lines 5 2026-04-27
DAL519 Delta Air Lines 5 2026-07-25
DAL513 Delta Air Lines 5 2026-07-23
DAL2852 - 5 2026-07-16
DAL2564 Delta Air Lines 5 2026-05-26
DAL1983 - 5 2026-07-13
DAL1946 Delta Air Lines 5 2026-05-15
DAL1882 Delta Air Lines 5 2026-06-04
DAL1669 Delta Air Lines 5 2026-07-26
DAL1505 Delta Air Lines 5 2026-07-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL2460 FSD → MSP Jul 26, 19:55 UTCJul 26, 21:45 UTC1h 50m
2026-07-26 DAL1669 MCO → BOS Jul 26, 16:45 UTCJul 26, 18:15 UTC1h 30m
2026-07-26 DAL1745 DEN → DTW Jul 26, 12:20 UTCJul 26, 14:40 UTC2h 20m
2026-07-25 DAL519 BOS → LAX Jul 25, 21:10 UTCJul 25, 23:55 UTC2h 45m
2026-07-25 DAL519 BOS → LAX Jul 25, 21:08 UTCJul 25, 23:48 UTC2h 40m
2026-07-25 DAL515 JFK → LAX Jul 25, 14:15 UTCJul 25, 18:20 UTC4h 5m
2026-07-24 DAL1219 RSW → BOS Jul 24, 21:50 UTCJul 25, 02:00 UTC4h 10m
2026-07-24 DAL322 SFO → BOS Jul 24, 18:05 UTCJul 24, 20:20 UTC2h 15m
2026-07-24 DAL322 SFO → BOS Jul 24, 18:05 UTCJul 24, 20:16 UTC2h 11m
2026-07-24 DAL855 ATL → BOS Jul 24, 14:20 UTCJul 24, 16:30 UTC2h 10m
2026-07-24 DAL1380 BOS → LGA Jul 24, 04:50 UTCJul 24, 05:45 UTC55m
2026-07-24 DAL1380 BOS → LGA Jul 24, 04:48 UTCJul 24, 06:01 UTC1h 13m
2026-07-24 DAL2583 SDF → ATL Jul 24, 02:00 UTCJul 24, 03:30 UTC1h 30m
2026-07-23 DAL2621 SEA → BOS Jul 23, 22:45 UTCJul 23, 23:45 UTC1h 0m
2026-07-23 DAL2600 JAX → BOS Jul 23, 20:10 UTCJul 23, 21:10 UTC1h 0m
2026-07-23 DAL990 DTW → BOS Jul 23, 16:45 UTCJul 23, 18:35 UTC1h 50m
2026-07-23 DAL513 ATL → EWR Jul 23, 12:57 UTCJul 23, 15:01 UTC2h 4m
2026-07-23 DAL513 ATL → EWR Jul 23, 13:00 UTCJul 23, 15:05 UTC2h 5m
2026-07-23 DAL794 LGA → ORD Jul 23, 00:15 UTCJul 23, 01:50 UTC1h 35m
2026-07-22 DAL1329 SLC → DFW Jul 22, 20:55 UTCJul 22, 22:40 UTC1h 45m
2026-07-22 DAL1179 AUS → BOS Jul 22, 15:20 UTCJul 22, 19:10 UTC3h 50m
2026-07-21 DAL369 BTV → ATL Jul 21, 22:25 UTCJul 22, 02:35 UTC4h 10m
2026-07-21 DAL2222 YUL → ATL Jul 21, 19:10 UTCJul 21, 20:55 UTC1h 45m
2026-07-21 DAL2648 DTW → BOS Jul 21, 14:25 UTCJul 21, 15:45 UTC1h 20m
2026-07-21 DAL2648 DTW → BOS Jul 21, 14:24 UTCJul 21, 16:08 UTC1h 44m
2026-07-21 DAL1461 MSP → DTW Jul 21, 11:25 UTCJul 21, 12:30 UTC1h 5m
2026-07-21 DAL2647 BOS → LAX Jul 21, 01:27 UTCJul 21, 04:39 UTC3h 12m
2026-07-21 DAL2647 BOS → LAX Jul 21, 01:30 UTCJul 21, 04:40 UTC3h 10m
2026-07-20 DAL843 ATL → SAN Jul 20, 19:45 UTCJul 20, 23:35 UTC3h 50m
2026-07-20 DAL990 LGA → ATL Jul 20, 16:25 UTCJul 20, 18:05 UTC1h 40m
2026-07-20 DAL513 ATL → LGA Jul 20, 13:05 UTCJul 20, 14:50 UTC1h 45m
2026-07-20 DAL2375 - Jul 20, 09:35 UTCJul 20, 11:05 UTC1h 30m
2026-07-20 DAL2375 DTW → ATL Jul 20, 09:32 UTCJul 20, 11:02 UTC1h 30m
2026-07-20 DAL1232 - Jul 20, 01:35 UTCJul 20, 03:05 UTC1h 30m
2026-07-19 DAL706 DEN → ATL Jul 19, 20:30 UTCJul 19, 23:10 UTC2h 40m
2026-07-19 DAL706 ATL → DEN Jul 19, 16:10 UTCJul 19, 18:45 UTC2h 35m
2026-07-19 DAL1505 SLC → SAT Jul 19, 13:20 UTCJul 19, 13:45 UTC25m
2026-07-19 DAL1505 SLC → SAT Jul 19, 13:17 UTCJul 19, 14:16 UTC59m
2026-07-18 DAL1123 LAX → BOS Jul 18, 22:55 UTCJul 19, 01:05 UTC2h 10m
2026-07-18 DAL1378 FLL → DTW Jul 18, 18:40 UTCJul 18, 21:25 UTC2h 45m
2026-07-18 DAL1378 FLL → DTW Jul 18, 14:20 UTCJul 18, 17:00 UTC2h 40m
2026-07-18 DAL1461 MSP → DTW Jul 18, 11:15 UTCJul 18, 12:30 UTC1h 15m
2026-07-18 DAL2647 SAN → MSP Jul 18, 02:19 UTCJul 18, 05:35 UTC3h 16m
2026-07-17 DAL843 ATL → SAN Jul 17, 20:25 UTCJul 18, 00:19 UTC3h 55m
2026-07-17 DAL990 - Jul 17, 18:25 UTCJul 17, 18:34 UTC10m
2026-07-17 DAL990 LGA → ATL Jul 17, 16:19 UTCJul 17, 18:05 UTC1h 46m
2026-07-17 DAL990 LGA → ATL Jul 17, 16:19 UTCJul 17, 18:34 UTC2h 15m
2026-07-17 DAL513 ATL → LGA Jul 17, 12:45 UTCJul 17, 14:30 UTC1h 45m
2026-07-17 DAL513 ATL → LGA Jul 17, 12:42 UTCJul 17, 14:24 UTC1h 42m
2026-07-17 DAL2722 SFO → ATL Jul 17, 09:40 UTCJul 17, 10:25 UTC45m

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 N123DW page for operator, model, and routing details .

Mode-S A05F37 frequently asked

What is Mode-S code A05F37?
A05F37 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N123DW.
Where is Mode-S A05F37 registered?
Mode-S code A05F37 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 A05F37 broadcasting right now?
Yes. Mode-S A05F37 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A05F37, octal 50057467, decimal 10,510,135.
What flights does A05F37 operate?
Mode-S A05F37 has broadcast 20 distinct callsigns, including DAL994, DAL706, DAL557, DAL754, DAL371.