Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A42A5C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N368DN · AIRBUS A-321 · operated by DELTA AIR LINES INC

Hex
A42A5C
Octal
51025134
Decimal
10,758,748
Country
US
Tail
N368DN
Type
A321
Broadcasting now · callsign DAL1745 · 37,000 ft
Flights observed
548
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Current position

A42A5C is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A42A5C 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
DAL1179 Delta Air Lines 9 2026-07-19
DAL3024 - 8 2026-07-12
DAL2396 Delta Air Lines 8 2026-04-30
DAL1573 Delta Air Lines 7 2026-07-21
DAL992 - 6 2026-07-12
DAL660 Delta Air Lines 6 2026-07-24
DAL519 Delta Air Lines 6 2026-07-04
DAL2724 Delta Air Lines 6 2026-06-20
DAL2663 - 6 2026-06-27
DAL2438 Delta Air Lines 6 2026-05-29
DAL2409 Delta Air Lines 6 2026-07-22
DAL2387 Delta Air Lines 6 2026-04-30
DAL2076 - 6 2026-06-22
DAL997 Delta Air Lines 5 2026-07-24
DAL975 Delta Air Lines 5 2026-07-25
DAL540 Delta Air Lines 5 2026-07-26
DAL341 Delta Air Lines 5 2026-07-26
DAL337 - 5 2026-06-22
DAL1745 - 5 2026-07-02
DAL1566 Delta Air Lines 5 2026-04-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL540 BOS → TPA Jul 26, 21:35 UTCJul 26, 22:45 UTC1h 10m
2026-07-26 DAL540 BOS → TPA Jul 26, 16:00 UTCJul 26, 19:40 UTC3h 40m
2026-07-26 DAL341 BOS → SEA Jul 26, 12:00 UTCJul 26, 14:30 UTC2h 30m
2026-07-25 DAL746 DFW → LGA Jul 25, 23:45 UTCJul 26, 02:25 UTC2h 40m
2026-07-25 DAL1912 DTW → CUN Jul 25, 18:25 UTCJul 25, 21:05 UTC2h 40m
2026-07-25 DAL1912 DTW → CUN Jul 25, 17:30 UTCJul 25, 17:50 UTC20m
2026-07-25 DAL1909 MSP → LGA Jul 25, 15:30 UTCJul 25, 15:55 UTC25m
2026-07-25 DAL1909 MSP → LGA Jul 25, 12:25 UTCJul 25, 15:00 UTC2h 35m
2026-07-25 DAL975 LIH → SEA Jul 25, 01:15 UTCJul 25, 03:05 UTC1h 50m
2026-07-25 DAL975 LIH → SEA Jul 25, 01:12 UTCJul 25, 03:00 UTC1h 48m
2026-07-24 DAL997 MCO → LGA Jul 24, 21:49 UTCJul 24, 23:42 UTC1h 53m
2026-07-24 DAL997 MCO → LGA Jul 24, 21:50 UTCJul 24, 23:50 UTC2h 0m
2026-07-24 DAL835 LGA → RSW Jul 24, 16:20 UTCJul 24, 20:00 UTC3h 40m
2026-07-24 DAL1331 MSP → SJC Jul 24, 13:10 UTCJul 24, 14:25 UTC1h 15m
2026-07-24 DAL1091 CVG → LAS Jul 24, 05:20 UTCJul 24, 07:05 UTC1h 45m
2026-07-24 DAL660 ATL → SLC Jul 24, 00:00 UTCJul 24, 03:35 UTC3h 35m
2026-07-23 DAL974 MSP → LAX Jul 23, 19:30 UTCJul 23, 21:20 UTC1h 50m
2026-07-23 DAL1669 MCO → BOS Jul 23, 16:40 UTCJul 23, 17:50 UTC1h 10m
2026-07-23 DAL1669 MCO → BOS Jul 23, 16:38 UTCJul 23, 17:53 UTC1h 15m
2026-07-23 DAL2160 GRR → ATL Jul 23, 12:30 UTCJul 23, 13:55 UTC1h 25m
2026-07-23 DAL840 ATL → DEN Jul 23, 01:00 UTCJul 23, 03:30 UTC2h 30m
2026-07-22 DAL1025 BOS → RSW Jul 22, 21:15 UTCJul 22, 23:05 UTC1h 50m
2026-07-22 DAL1025 BOS → RSW Jul 22, 21:14 UTCJul 22, 23:27 UTC2h 13m
2026-07-22 DAL2409 JFK → DFW Jul 22, 15:25 UTCJul 22, 17:50 UTC2h 25m
2026-07-22 DAL2133 ATL → RIC Jul 22, 11:15 UTCJul 22, 13:35 UTC2h 20m
2026-07-21 DAL1181 BOS → AUS Jul 21, 15:50 UTCJul 21, 18:30 UTC2h 40m
2026-07-21 DAL1573 BOS → TPA Jul 21, 11:15 UTCJul 21, 13:25 UTC2h 10m
2026-07-21 DAL2540 ATL → MSN Jul 21, 03:00 UTCJul 21, 05:05 UTC2h 5m
2026-07-21 DAL2540 ATL → MSN Jul 21, 03:05 UTCJul 21, 05:15 UTC2h 10m
2026-07-20 DAL997 MCO → LGA Jul 20, 21:30 UTCJul 20, 23:20 UTC1h 50m
2026-07-20 DAL1512 - Jul 20, 17:35 UTCJul 20, 18:55 UTC1h 20m
2026-07-20 DAL1512 ATL → FLL Jul 20, 14:40 UTCJul 20, 16:10 UTC1h 30m
2026-07-20 DAL2990 ATL → BOS Jul 20, 02:25 UTCJul 20, 03:05 UTC40m
2026-07-19 DAL2990 ATL → BOS Jul 19, 23:55 UTCJul 20, 00:45 UTC50m
2026-07-19 DAL1179 AUS → BOS Jul 19, 19:50 UTCJul 19, 20:05 UTC15m
2026-07-19 DAL1179 AUS → BOS Jul 19, 15:12 UTCJul 19, 19:35 UTC4h 23m
2026-07-19 DAL1179 AUS → BOS Jul 19, 15:15 UTCJul 19, 19:00 UTC3h 45m
2026-07-18 DAL843 ATL → SAN Jul 18, 20:10 UTCJul 19, 00:05 UTC3h 55m
2026-07-18 DAL1311 SLC → SFO Jul 18, 15:30 UTCJul 18, 16:50 UTC1h 20m
2026-07-18 DAL1311 SLC → SFO Jul 18, 12:30 UTCJul 18, 14:15 UTC1h 45m
2026-07-18 DAL2621 - Jul 18, 04:50 UTCJul 18, 05:45 UTC55m
2026-07-18 DAL2621 RDU → ATL Jul 18, 04:47 UTCJul 18, 05:40 UTC53m
2026-07-17 DAL2600 ATL → RDU Jul 17, 21:20 UTCJul 17, 22:25 UTC1h 5m
2026-07-17 DAL2397 EWR → ATL Jul 17, 16:15 UTCJul 17, 18:00 UTC1h 45m
2026-07-17 DAL2397 EWR → ATL Jul 17, 16:14 UTCJul 17, 17:56 UTC1h 42m
2026-07-17 DAL2397 ATL → EWR Jul 17, 12:40 UTCJul 17, 14:24 UTC1h 45m
2026-07-17 DAL1460 - Jul 17, 09:55 UTCJul 17, 11:00 UTC1h 5m
2026-07-17 DAL1460 RIC → ATL Jul 17, 09:50 UTCJul 17, 11:01 UTC1h 11m
2026-07-17 DAL1263 ORD → ATL Jul 17, 03:32 UTCJul 17, 04:43 UTC1h 11m
2026-07-16 DAL1026 MSP → ATL Jul 16, 23:49 UTCJul 17, 01:55 UTC2h 5m

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 N368DN page for operator, model, and routing details .

Mode-S A42A5C frequently asked

What is Mode-S code A42A5C?
A42A5C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N368DN.
Where is Mode-S A42A5C registered?
Mode-S code A42A5C 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 A42A5C broadcasting right now?
Yes. Mode-S A42A5C is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A42A5C, octal 51025134, decimal 10,758,748.
What flights does A42A5C operate?
Mode-S A42A5C has broadcast 20 distinct callsigns, including DAL1179, DAL3024, DAL2396, DAL1573, DAL992.