Apparatus

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sensors Mode-S transponder

A41C56

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N364NB · AIRBUS A-319 · operated by DELTA AIR LINES INC

Hex
A41C56
Octal
51016126
Decimal
10,755,158
Country
US
Tail
N364NB
Type
A319
Broadcasting now · callsign DAL1018 · 15,850 ft
Flights observed
519
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Current position

A41C56 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A41C56 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
DAL628 - 10 2026-06-21
DAL2141 - 10 2026-04-15
DAL2030 - 10 2026-07-10
DAL2476 - 9 2026-07-09
DAL2459 Delta Air Lines 8 2026-06-08
DAL788 Delta Air Lines 7 2026-05-21
DAL381 Delta Air Lines 7 2026-05-24
DAL2316 Delta Air Lines 7 2026-07-07
DAL1302 Delta Air Lines 7 2026-05-28
DAL2766 Delta Air Lines 6 2026-06-07
DAL2689 Delta Air Lines 6 2026-05-29
DAL2682 - 6 2026-07-08
DAL2292 - 6 2026-07-10
DAL1517 - 6 2026-06-15
DAL642 Delta Air Lines 5 2026-06-21
DAL487 Delta Air Lines 5 2026-06-24
DAL439 - 5 2026-07-11
DAL303 Delta Air Lines 5 2026-04-15
DAL2898 - 5 2026-06-26
DAL2677 Delta Air Lines 5 2026-04-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 DAL1018 - Jul 14, 19:10 UTCJul 14, 19:30 UTC20m
2026-07-14 DAL1038 - Jul 14, 16:00 UTCJul 14, 17:35 UTC1h 35m
2026-07-14 DAL1279 TPA → RDU Jul 14, 13:10 UTCJul 14, 14:35 UTC1h 25m
2026-07-14 DAL1279 - Jul 14, 10:35 UTCJul 14, 11:55 UTC1h 20m
2026-07-14 DAL817 BOS → RDU Jul 14, 01:50 UTCJul 14, 03:20 UTC1h 30m
2026-07-13 DAL1075 - Jul 13, 22:55 UTCJul 14, 00:30 UTC1h 35m
2026-07-13 DAL1075 RDU → BOS Jul 13, 22:52 UTCJul 14, 00:22 UTC1h 30m
2026-07-13 DAL2283 BOS → RDU Jul 13, 19:58 UTCJul 13, 21:29 UTC1h 31m
2026-07-13 DAL2283 BOS → RDU Jul 13, 20:00 UTCJul 13, 21:30 UTC1h 30m
2026-07-13 DAL2351 DFW → BOS Jul 13, 15:15 UTCJul 13, 18:40 UTC3h 25m
2026-07-13 DAL1207 - Jul 13, 03:45 UTCJul 13, 05:50 UTC2h 5m
2026-07-12 DAL2358 - Jul 12, 22:45 UTCJul 12, 23:30 UTC45m
2026-07-12 DAL2358 - Jul 12, 20:05 UTCJul 12, 21:00 UTC55m
2026-07-12 DAL2343 - Jul 12, 17:05 UTCJul 12, 18:25 UTC1h 20m
2026-07-12 DAL2343 JFK → DTW Jul 12, 17:05 UTCJul 12, 18:25 UTC1h 20m
2026-07-12 DAL2751 - Jul 12, 14:25 UTCJul 12, 15:40 UTC1h 15m
2026-07-12 DAL2751 DTW → JFK Jul 12, 14:23 UTCJul 12, 15:42 UTC1h 19m
2026-07-12 DAL1389 - Jul 12, 10:50 UTCJul 12, 13:15 UTC2h 25m
2026-07-12 DAL1633 - Jul 12, 01:05 UTCJul 12, 03:30 UTC2h 25m
2026-07-11 DAL1865 - Jul 11, 21:30 UTCJul 11, 23:50 UTC2h 20m
2026-07-11 DAL1143 - Jul 11, 16:40 UTCJul 11, 19:55 UTC3h 15m
2026-07-11 DAL439 DFW → LAX Jul 11, 12:18 UTCJul 11, 14:53 UTC2h 35m
2026-07-11 DAL439 DFW → LAX Jul 11, 12:20 UTCJul 11, 15:00 UTC2h 40m
2026-07-11 DAL1207 - Jul 11, 05:05 UTCJul 11, 05:15 UTC10m
2026-07-11 DAL1207 - Jul 11, 02:10 UTCJul 11, 05:15 UTC3h 5m
2026-07-11 DAL1207 DTW → DFW Jul 11, 02:05 UTCJul 11, 04:47 UTC2h 42m
2026-07-10 DAL1218 AUS → DTW Jul 10, 19:20 UTCJul 10, 21:50 UTC2h 30m
2026-07-10 DAL1218 - Jul 10, 15:15 UTCJul 10, 17:50 UTC2h 35m
2026-07-10 DAL2292 - Jul 10, 10:55 UTCJul 10, 11:30 UTC35m
2026-07-10 DAL2292 TVC → DTW Jul 10, 10:50 UTCJul 10, 11:29 UTC39m
2026-07-10 DAL2424 - Jul 10, 06:30 UTCJul 10, 07:00 UTC30m
2026-07-10 DAL2030 - Jul 10, 03:40 UTCJul 10, 04:45 UTC1h 5m
2026-07-10 DAL2030 DCA → DTW Jul 10, 03:38 UTCJul 10, 04:44 UTC1h 6m
2026-07-10 DAL2030 - Jul 10, 00:45 UTCJul 10, 01:45 UTC1h 0m
2026-07-09 DAL2476 DCA → DTW Jul 9, 17:15 UTCJul 9, 18:25 UTC1h 10m
2026-07-09 DAL2476 - Jul 9, 14:30 UTCJul 9, 15:30 UTC1h 0m
2026-07-09 DAL2183 DFW → DTW Jul 9, 10:25 UTCJul 9, 12:35 UTC2h 10m
2026-07-09 DAL420 - Jul 9, 02:25 UTCJul 9, 05:05 UTC2h 40m
2026-07-08 DAL2588 - Jul 8, 22:00 UTCJul 9, 00:30 UTC2h 30m
2026-07-08 DAL2458 - Jul 8, 17:50 UTCJul 8, 20:20 UTC2h 30m
2026-07-08 DAL2682 BNA → DTW Jul 8, 15:10 UTCJul 8, 16:25 UTC1h 15m
2026-07-08 DAL2682 DTW → BNA Jul 8, 12:40 UTCJul 8, 13:55 UTC1h 15m
2026-07-08 DAL1752 ROC → DTW Jul 8, 10:45 UTCJul 8, 11:35 UTC50m
2026-07-08 DAL3148 - Jul 8, 01:55 UTCJul 8, 02:40 UTC45m
2026-07-07 DAL2316 DTW → MSN Jul 7, 23:15 UTCJul 8, 00:25 UTC1h 10m
2026-07-07 DAL2316 DTW → MSN Jul 7, 23:13 UTCJul 8, 00:23 UTC1h 10m
2026-07-07 DAL2316 DTW → MSN Jul 7, 20:40 UTCJul 7, 22:00 UTC1h 20m
2026-07-07 DAL2343 JFK → DTW Jul 7, 17:50 UTCJul 7, 19:15 UTC1h 25m
2026-07-07 DAL2751 - Jul 7, 15:10 UTCJul 7, 16:20 UTC1h 10m
2026-07-07 DAL1389 - Jul 7, 10:40 UTCJul 7, 12:55 UTC2h 15m

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 N364NB page for operator, model, and routing details .

Mode-S A41C56 frequently asked

What is Mode-S code A41C56?
A41C56 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N364NB.
Where is Mode-S A41C56 registered?
Mode-S code A41C56 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 A41C56 broadcasting right now?
Yes. Mode-S A41C56 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A41C56, octal 51016126, decimal 10,755,158.
What flights does A41C56 operate?
Mode-S A41C56 has broadcast 20 distinct callsigns, including DAL628, DAL2141, DAL2030, DAL2476, DAL2459.