Apparatus

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sensors Mode-S transponder

A3F04A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N353DN · AIRBUS A-321 · operated by DELTA AIR LINES INC

Hex
A3F04A
Octal
50770112
Decimal
10,743,882
Country
US
Tail
N353DN
Type
A321
Broadcasting now · callsign DAL2138 · 35,025 ft
Flights observed
497
Distinct callsigns
20
Country
US
Last broadcast
3h ago

Current position

A3F04A is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A3F04A 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
DAL2593 Delta Air Lines 9 2026-05-15
DAL1103 Delta Air Lines 8 2026-05-15
DAL2886 Delta Air Lines 7 2026-06-09
DAL2649 Delta Air Lines 7 2026-05-15
DAL1190 Delta Air Lines 7 2026-06-11
DAL2724 Delta Air Lines 6 2026-06-24
DAL1946 - 6 2026-07-08
DAL1311 - 6 2026-07-03
DAL1269 - 6 2026-07-08
DAL2650 Delta Air Lines 5 2026-06-06
DAL1425 - 5 2026-07-08
DAL1384 Delta Air Lines 5 2026-06-08
DAL1372 - 5 2026-06-28
DAL1227 Delta Air Lines 5 2026-06-17
DAL1169 - 5 2026-07-06
DAL893 - 4 2026-06-18
DAL855 Delta Air Lines 4 2026-05-28
DAL838 - 4 2026-06-17
DAL726 - 4 2026-07-06
DAL665 - 4 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 DAL665 - Jul 14, 18:55 UTCJul 14, 23:00 UTC4h 4m
2026-07-14 DAL665 ATL → ONT Jul 14, 13:30 UTCJul 14, 17:15 UTC3h 45m
2026-07-14 DAL2450 - Jul 14, 11:10 UTCJul 14, 12:00 UTC50m
2026-07-14 DAL2315 - Jul 14, 01:15 UTCJul 14, 01:55 UTC40m
2026-07-13 DAL1579 - Jul 13, 20:30 UTCJul 13, 22:05 UTC1h 35m
2026-07-13 DAL1579 ATL → MIA Jul 13, 17:05 UTCJul 13, 18:40 UTC1h 35m
2026-07-12 DAL9936 - Jul 12, 16:05 UTCJul 12, 17:50 UTC1h 45m
2026-07-12 DAL9936 FLL → ATL Jul 12, 16:04 UTCJul 12, 17:48 UTC1h 44m
2026-07-11 DAL1037 - Jul 11, 22:05 UTCJul 12, 00:35 UTC2h 30m
2026-07-11 DAL2587 TPA → DTW Jul 11, 18:25 UTCJul 11, 20:45 UTC2h 20m
2026-07-11 DAL2587 - Jul 11, 14:40 UTCJul 11, 17:00 UTC2h 20m
2026-07-11 DAL2631 PPM → DTW Jul 11, 10:10 UTCJul 11, 12:35 UTC2h 25m
2026-07-11 DAL2296 DTW → FLL Jul 11, 00:55 UTCJul 11, 04:15 UTC3h 20m
2026-07-11 DAL2296 DTW → FLL Jul 11, 00:52 UTCJul 11, 04:14 UTC3h 22m
2026-07-10 DAL1432 BOS → DTW Jul 10, 21:40 UTCJul 10, 23:20 UTC1h 40m
2026-07-10 DAL1171 - Jul 10, 18:20 UTCJul 10, 20:00 UTC1h 40m
2026-07-10 DAL1171 DTW → BOS Jul 10, 18:18 UTCJul 10, 19:50 UTC1h 32m
2026-07-10 DAL1240 ATL → DTW Jul 10, 15:10 UTCJul 10, 16:35 UTC1h 25m
2026-07-10 DAL349 - Jul 10, 12:20 UTCJul 10, 13:40 UTC1h 20m
2026-07-10 DAL349 CLE → ATL Jul 10, 12:15 UTCJul 10, 13:34 UTC1h 19m
2026-07-10 DAL1320 ATL → CLE Jul 10, 05:40 UTCJul 10, 07:05 UTC1h 25m
2026-07-10 DAL1742 MCO → ATL Jul 10, 01:35 UTCJul 10, 02:40 UTC1h 5m
2026-07-09 DAL1742 ATL → MCO Jul 9, 22:35 UTCJul 9, 23:50 UTC1h 15m
2026-07-09 DAL1137 SCH → ATL Jul 9, 18:05 UTCJul 9, 20:25 UTC2h 20m
2026-07-09 DAL1137 ATL → ALB Jul 9, 13:15 UTCJul 9, 15:10 UTC1h 55m
2026-07-09 DAL1494 MSP → FAR Jul 9, 10:35 UTCJul 9, 11:35 UTC1h 0m
2026-07-09 DAL1562 ATL → MCO Jul 9, 04:05 UTCJul 9, 05:05 UTC1h 0m
2026-07-08 DAL1425 TPA → ATL Jul 8, 23:20 UTCJul 9, 00:25 UTC1h 5m
2026-07-08 DAL1425 ATL → TPA Jul 8, 20:30 UTCJul 8, 21:35 UTC1h 5m
2026-07-08 DAL2779 LGA → BOS Jul 8, 16:40 UTCJul 8, 18:55 UTC2h 15m
2026-07-08 DAL2779 LGA → BOS Jul 8, 16:39 UTCJul 8, 18:49 UTC2h 10m
2026-07-08 DAL2432 ATL → BOS Jul 8, 12:40 UTCJul 8, 14:40 UTC2h 0m
2026-07-08 DAL1269 PHL → ATL Jul 8, 09:25 UTCJul 8, 11:00 UTC1h 35m
2026-07-08 DAL2642 ATL → PHL Jul 8, 04:30 UTCJul 8, 06:00 UTC1h 30m
2026-07-08 DAL1946 - Jul 8, 01:10 UTCJul 8, 02:45 UTC1h 35m
2026-07-07 DAL1946 - Jul 7, 23:25 UTCJul 7, 23:35 UTC10m
2026-07-07 DAL1946 - Jul 7, 19:00 UTCJul 7, 22:15 UTC3h 15m
2026-07-07 DAL1658 MCO → ATL Jul 7, 16:10 UTCJul 7, 17:15 UTC1h 5m
2026-07-07 DAL1658 ATL → MCO Jul 7, 13:35 UTCJul 7, 14:35 UTC1h 0m
2026-07-07 DAL2450 - Jul 7, 11:05 UTCJul 7, 11:50 UTC45m
2026-07-07 DAL2276 - Jul 7, 03:00 UTCJul 7, 03:50 UTC50m
2026-07-06 DAL2464 DTW → PHL Jul 6, 22:55 UTCJul 7, 01:10 UTC2h 15m
2026-07-06 DAL726 ATL → BOS Jul 6, 18:55 UTCJul 6, 21:00 UTC2h 5m
2026-07-06 DAL726 ATL → BOS Jul 6, 18:55 UTCJul 6, 21:13 UTC2h 18m
2026-07-06 DAL1585 - Jul 6, 15:10 UTCJul 6, 16:40 UTC1h 30m
2026-07-06 DAL1585 - Jul 6, 11:55 UTCJul 6, 13:25 UTC1h 30m
2026-07-06 DAL1169 - Jul 6, 01:50 UTCJul 6, 03:30 UTC1h 40m
2026-07-06 DAL1169 PHL → ATL Jul 6, 01:45 UTCJul 6, 03:19 UTC1h 34m
2026-07-06 DAL1169 PHL → PHL Jul 6, 01:25 UTCJul 6, 01:40 UTC15m
2026-07-05 DAL1169 ATL → PHL Jul 5, 19:30 UTCJul 5, 21:15 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 N353DN page for operator, model, and routing details .

Mode-S A3F04A frequently asked

What is Mode-S code A3F04A?
A3F04A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N353DN.
Where is Mode-S A3F04A registered?
Mode-S code A3F04A 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 A3F04A broadcasting right now?
Yes. Mode-S A3F04A is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3F04A, octal 50770112, decimal 10,743,882.
What flights does A3F04A operate?
Mode-S A3F04A has broadcast 20 distinct callsigns, including DAL2593, DAL1103, DAL2886, DAL2649, DAL1190.