Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A3C9B4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N343NW · AIRBUS A-320 · operated by DELTA AIR LINES INC

Hex
A3C9B4
Octal
50744664
Decimal
10,734,004
Country
US
Tail
N343NW
Type
A320
No current signal · last broadcast Jul 26, 22:40 UTC
Flights observed
549
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:40 UTC

Last known position

Most recent position reported by Mode-S A3C9B4.

Country allocation

The ICAO 24-bit address A3C9B4 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
DAL2982 Delta Air Lines 20 2026-07-01
DAL380 Delta Air Lines 15 2026-07-24
DAL775 - 14 2026-07-12
DAL2882 - 13 2026-06-28
DAL2392 - 13 2026-07-09
DAL2511 - 12 2026-06-18
DAL2479 Delta Air Lines 11 2026-07-16
DAL1408 - 10 2026-07-14
DAL850 Delta Air Lines 9 2026-07-25
DAL360 - 9 2026-06-19
DAL832 - 8 2026-07-17
DAL2902 - 8 2026-06-19
DAL1051 Delta Air Lines 8 2026-04-18
DAL926 Delta Air Lines 7 2026-06-03
DAL455 - 7 2026-07-15
DAL2916 Delta Air Lines 7 2026-04-18
DAL2537 Delta Air Lines 7 2026-07-26
DAL2062 Delta Air Lines 7 2026-07-23
DAL1728 Delta Air Lines 7 2026-06-09
DAL1309 Delta Air Lines 7 2026-06-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL2537 BOS → RDU Jul 26, 16:20 UTCJul 26, 22:25 UTC6h 5m
2026-07-25 DAL1118 CVG → SLC Jul 25, 19:25 UTCJul 25, 21:40 UTC2h 15m
2026-07-25 DAL1118 CVG → SLC Jul 25, 15:20 UTCJul 25, 17:20 UTC2h 0m
2026-07-25 DAL1382 BTV → ATL Jul 25, 11:15 UTCJul 25, 13:25 UTC2h 10m
2026-07-25 DAL1382 BTV → ATL Jul 25, 11:12 UTCJul 25, 13:23 UTC2h 11m
2026-07-25 DAL1027 SEA → HNL Jul 25, 02:50 UTCJul 25, 04:50 UTC2h 0m
2026-07-25 DAL1027 SEA → HNL Jul 25, 02:47 UTCJul 25, 04:51 UTC2h 4m
2026-07-25 DAL850 SEA → TPA Jul 25, 00:05 UTCJul 25, 01:00 UTC55m
2026-07-25 DAL850 SEA → TPA Jul 25, 00:02 UTCJul 25, 01:20 UTC1h 18m
2026-07-24 DAL850 SEA → TPA Jul 24, 20:20 UTCJul 24, 21:55 UTC1h 35m
2026-07-24 DAL380 SLC → JFK Jul 24, 16:45 UTCJul 24, 18:00 UTC1h 15m
2026-07-24 DAL380 SLC → JFK Jul 24, 13:55 UTCJul 24, 15:20 UTC1h 25m
2026-07-24 DAL401 DFW → ATL Jul 24, 10:35 UTCJul 24, 12:20 UTC1h 45m
2026-07-24 DAL2967 MYR → ATL Jul 24, 01:40 UTCJul 24, 03:30 UTC1h 50m
2026-07-23 DAL2062 AUS → MSP Jul 23, 20:00 UTCJul 23, 22:15 UTC2h 15m
2026-07-23 DAL2062 AUS → MSP Jul 23, 16:25 UTCJul 23, 18:40 UTC2h 15m
2026-07-23 DAL2808 BOI → MSP Jul 23, 11:40 UTCJul 23, 13:55 UTC2h 15m
2026-07-23 DAL2808 BOI → MSP Jul 23, 11:38 UTCJul 23, 13:53 UTC2h 15m
2026-07-23 DAL2111 JFK → RSW Jul 23, 05:10 UTCJul 23, 05:55 UTC45m
2026-07-23 DAL2111 JFK → RSW Jul 23, 05:07 UTCJul 23, 05:52 UTC45m
2026-07-22 DAL1659 - Jul 22, 20:20 UTCJul 22, 21:15 UTC55m
2026-07-22 DAL1659 SLC → LAS Jul 22, 18:00 UTCJul 22, 18:55 UTC55m
2026-07-22 DAL2173 BOI → SLC Jul 22, 15:10 UTCJul 22, 15:55 UTC45m
2026-07-22 DAL2173 BOI → SLC Jul 22, 15:06 UTCJul 22, 15:48 UTC42m
2026-07-22 DAL2111 JFK → RSW Jul 22, 13:10 UTCJul 22, 14:00 UTC50m
2026-07-21 DAL920 SFO → SLC Jul 21, 18:35 UTCJul 21, 20:00 UTC1h 25m
2026-07-21 DAL920 - Jul 21, 15:35 UTCJul 21, 17:05 UTC1h 30m
2026-07-21 DAL2592 BOS → LGA Jul 21, 11:40 UTCJul 21, 14:00 UTC2h 20m
2026-07-21 DAL2797 DTW → BUF Jul 21, 03:15 UTCJul 21, 05:45 UTC2h 30m
2026-07-20 DAL2812 DFW → SLC Jul 20, 23:35 UTCJul 21, 01:35 UTC2h 0m
2026-07-20 DAL2971 MSP → DFW Jul 20, 20:10 UTCJul 20, 22:05 UTC1h 55m
2026-07-20 DAL2864 - Jul 20, 16:25 UTCJul 20, 18:50 UTC2h 25m
2026-07-20 DAL2864 MSP → EWR Jul 20, 12:45 UTCJul 20, 14:55 UTC2h 10m
2026-07-20 DAL8784 MSN → ATL Jul 20, 03:05 UTCJul 20, 05:20 UTC2h 15m
2026-07-19 DAL2537 BOS → RDU Jul 19, 19:52 UTCJul 19, 22:22 UTC2h 30m
2026-07-19 DAL2537 BOS → RDU Jul 19, 15:45 UTCJul 19, 22:20 UTC6h 35m
2026-07-19 DAL1157 ATL → CVG Jul 19, 12:05 UTCJul 19, 13:50 UTC1h 45m
2026-07-19 DAL2010 BOS → MCI Jul 19, 02:45 UTCJul 19, 04:35 UTC1h 50m
2026-07-17 DAL2991 SYR → ATL Jul 17, 20:00 UTCJul 17, 22:15 UTC2h 15m
2026-07-17 DAL2991 SYR → ATL Jul 17, 19:54 UTCJul 17, 22:12 UTC2h 18m
2026-07-17 DAL2991 SYR → ATL Jul 17, 16:49 UTCJul 17, 18:34 UTC1h 45m
2026-07-17 DAL832 DCA → ATL Jul 17, 02:10 UTCJul 17, 03:25 UTC1h 15m
2026-07-16 DAL832 ATL → DCA Jul 16, 23:35 UTCJul 17, 00:55 UTC1h 20m
2026-07-16 DAL2479 RDU → BOS Jul 16, 18:15 UTCJul 16, 20:25 UTC2h 10m
2026-07-16 DAL2479 RDU → BOS Jul 16, 14:29 UTCJul 16, 16:44 UTC2h 15m
2026-07-16 DAL2557 - Jul 16, 11:05 UTCJul 16, 12:40 UTC1h 35m
2026-07-16 DAL2051 - Jul 16, 02:40 UTCJul 16, 04:10 UTC1h 30m
2026-07-16 DAL2051 ATL → HOU Jul 16, 02:37 UTCJul 16, 04:09 UTC1h 32m
2026-07-15 DAL2266 - Jul 15, 21:20 UTCJul 15, 22:50 UTC1h 30m
2026-07-15 DAL2266 BUF → ATL Jul 15, 21:15 UTCJul 15, 22:47 UTC1h 32m

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 N343NW page for operator, model, and routing details .

Mode-S A3C9B4 frequently asked

What is Mode-S code A3C9B4?
A3C9B4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N343NW.
Where is Mode-S A3C9B4 registered?
Mode-S code A3C9B4 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 A3C9B4 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3C9B4, octal 50744664, decimal 10,734,004.
What flights does A3C9B4 operate?
Mode-S A3C9B4 has broadcast 20 distinct callsigns, including DAL2982, DAL380, DAL775, DAL2882, DAL2392.