Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A37AA3

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N323NB · AIRBUS A-319 · operated by DELTA AIR LINES INC

Hex
A37AA3
Octal
50675243
Decimal
10,713,763
Country
US
Tail
N323NB
Type
A319
No current signal · last broadcast Jul 26, 22:40 UTC
Flights observed
517
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:40 UTC

Last known position

Most recent position reported by Mode-S A37AA3.

Country allocation

The ICAO 24-bit address A37AA3 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
DAL2551 Delta Air Lines 10 2026-07-24
DAL2168 - 10 2026-07-15
DAL2975 Delta Air Lines 9 2026-07-25
DAL2147 - 9 2026-07-09
DAL788 - 8 2026-07-20
DAL611 - 8 2026-07-13
DAL2766 Delta Air Lines 8 2026-07-22
DAL2632 Delta Air Lines 8 2026-06-26
DAL1237 - 8 2026-07-18
DAL605 - 6 2026-07-13
DAL2965 Delta Air Lines 6 2026-07-26
DAL2659 - 6 2026-07-08
DAL2459 Delta Air Lines 6 2026-07-23
DAL946 Delta Air Lines 5 2026-06-04
DAL628 Delta Air Lines 5 2026-05-31
DAL3190 - 5 2026-07-06
DAL3118 Delta Air Lines 5 2026-04-29
DAL303 Delta Air Lines 5 2026-04-18
DAL2961 Delta Air Lines 5 2026-07-20
DAL2818 - 5 2026-07-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL948 SLC → DTW Jul 26, 20:55 UTCJul 26, 22:40 UTC1h 45m
2026-07-26 DAL2965 BWI → DTW Jul 26, 18:35 UTCJul 26, 19:35 UTC1h 0m
2026-07-26 DAL2965 BWI → DTW Jul 26, 18:36 UTCJul 26, 19:29 UTC53m
2026-07-26 DAL2965 BWI → DTW Jul 26, 16:25 UTCJul 26, 17:10 UTC45m
2026-07-26 DAL1654 MSP → DFW Jul 26, 14:05 UTCJul 26, 15:00 UTC55m
2026-07-26 DAL3073 ATL → PHL Jul 26, 04:15 UTCJul 26, 05:05 UTC50m
2026-07-26 DAL3073 ATL → PHL Jul 26, 04:13 UTCJul 26, 04:57 UTC44m
2026-07-25 DAL2975 HPN → ATL Jul 25, 18:25 UTCJul 25, 20:25 UTC2h 0m
2026-07-25 DAL2975 HPN → ATL Jul 25, 14:10 UTCJul 25, 15:55 UTC1h 45m
2026-07-25 DAL948 SLC → DTW Jul 25, 03:25 UTCJul 25, 05:55 UTC2h 30m
2026-07-25 DAL948 SLC → DTW Jul 25, 03:30 UTCJul 25, 05:55 UTC2h 25m
2026-07-24 DAL948 SLC → DTW Jul 24, 20:50 UTCJul 24, 23:40 UTC2h 50m
2026-07-24 DAL2965 BWI → DTW Jul 24, 18:35 UTCJul 24, 19:30 UTC55m
2026-07-24 DAL2965 BWI → DTW Jul 24, 18:32 UTCJul 24, 19:23 UTC51m
2026-07-24 DAL2965 BWI → DTW Jul 24, 16:35 UTCJul 24, 17:20 UTC45m
2026-07-24 DAL1654 MSP → DFW Jul 24, 14:05 UTCJul 24, 15:00 UTC55m
2026-07-24 DAL3073 ATL → PHL Jul 24, 04:05 UTCJul 24, 04:50 UTC45m
2026-07-24 DAL3073 ATL → PHL Jul 24, 04:01 UTCJul 24, 04:45 UTC44m
2026-07-24 DAL2551 LAX → PDX Jul 24, 00:40 UTCJul 24, 02:50 UTC2h 10m
2026-07-23 DAL2551 LAX → PDX Jul 23, 21:35 UTCJul 23, 22:45 UTC1h 10m
2026-07-23 DAL2551 LAX → PDX Jul 23, 21:33 UTCJul 23, 23:22 UTC1h 49m
2026-07-23 DAL2975 HPN → ATL Jul 23, 18:25 UTCJul 23, 20:25 UTC2h 0m
2026-07-23 DAL2975 HPN → ATL Jul 23, 14:15 UTCJul 23, 16:05 UTC1h 50m
2026-07-23 DAL2459 LAX → PDX Jul 23, 03:55 UTCJul 23, 05:55 UTC2h 0m
2026-07-23 DAL2459 LAX → PDX Jul 23, 00:20 UTCJul 23, 02:25 UTC2h 5m
2026-07-22 DAL2766 ALB → ATL Jul 22, 20:35 UTCJul 22, 22:40 UTC2h 5m
2026-07-22 DAL2766 ALB → ATL Jul 22, 20:35 UTCJul 22, 22:34 UTC1h 59m
2026-07-22 DAL2766 ALB → ATL Jul 22, 17:00 UTCJul 22, 18:50 UTC1h 50m
2026-07-22 DAL2002 DEN → LAX Jul 22, 13:50 UTCJul 22, 15:40 UTC1h 50m
2026-07-22 DAL1729 SAV → ATL Jul 22, 03:30 UTCJul 22, 05:25 UTC1h 55m
2026-07-22 DAL1729 SAV → ATL Jul 22, 03:27 UTCJul 22, 05:27 UTC2h 0m
2026-07-22 DAL1438 BNA → LGA Jul 22, 01:10 UTCJul 22, 02:05 UTC55m
2026-07-21 DAL1438 BNA → LGA Jul 21, 23:00 UTCJul 21, 23:45 UTC45m
2026-07-21 DAL521 SFO → JFK Jul 21, 19:15 UTCJul 21, 21:50 UTC2h 35m
2026-07-21 DAL521 SFO → JFK Jul 21, 14:45 UTCJul 21, 17:25 UTC2h 40m
2026-07-21 DAL1584 AUS → ATL Jul 21, 02:05 UTCJul 21, 04:50 UTC2h 45m
2026-07-20 DAL1612 JFK → PBI Jul 20, 20:45 UTCJul 20, 23:10 UTC2h 25m
2026-07-20 DAL788 SSF → DTW Jul 20, 16:45 UTCJul 20, 19:25 UTC2h 40m
2026-07-20 DAL788 - Jul 20, 12:40 UTCJul 20, 15:15 UTC2h 35m
2026-07-20 DAL2869 ATL → ROC Jul 20, 10:10 UTCJul 20, 11:20 UTC1h 10m
2026-07-20 DAL2961 ATL → LEX Jul 20, 01:40 UTCJul 20, 03:40 UTC2h 0m
2026-07-19 DAL2863 DCA → MSP Jul 19, 19:25 UTCJul 19, 21:45 UTC2h 20m
2026-07-19 DAL2983 MSP → DCA Jul 19, 15:55 UTCJul 19, 17:55 UTC2h 0m
2026-07-19 DAL1006 SLC → LAX Jul 19, 13:25 UTCJul 19, 14:05 UTC40m
2026-07-18 DAL2615 EWR → DTW Jul 18, 22:30 UTCJul 19, 00:30 UTC2h 0m
2026-07-18 DAL1866 MTY → ATL Jul 18, 18:20 UTCJul 18, 20:45 UTC2h 25m
2026-07-18 DAL1929 ATL → MTY Jul 18, 14:40 UTCJul 18, 17:05 UTC2h 25m
2026-07-18 DAL1237 FSD → ATL Jul 18, 10:20 UTCJul 18, 12:20 UTC2h 0m
2026-07-17 DAL2615 EWR → DTW Jul 17, 22:40 UTCJul 18, 00:50 UTC2h 10m
2026-07-17 DAL1866 MTY → ATL Jul 17, 18:19 UTCJul 17, 20:44 UTC2h 25m

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 N323NB page for operator, model, and routing details .

Mode-S A37AA3 frequently asked

What is Mode-S code A37AA3?
A37AA3 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N323NB.
Where is Mode-S A37AA3 registered?
Mode-S code A37AA3 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 A37AA3 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 A37AA3, octal 50675243, decimal 10,713,763.
What flights does A37AA3 operate?
Mode-S A37AA3 has broadcast 20 distinct callsigns, including DAL2551, DAL2168, DAL2975, DAL2147, DAL788.