Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A3A990

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N335NB · AIRBUS A-319 · operated by DELTA AIR LINES INC

Hex
A3A990
Octal
50724620
Decimal
10,725,776
Country
US
Tail
N335NB
Type
A319
No current signal · last broadcast Jul 26, 21:15 UTC
Flights observed
542
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:15 UTC

Last known position

Most recent position reported by Mode-S A3A990.

Country allocation

The ICAO 24-bit address A3A990 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
DAL1281 Delta Air Lines 20 2026-05-21
DAL2659 Delta Air Lines 15 2026-05-17
DAL487 - 11 2026-07-16
DAL2372 Delta Air Lines 11 2026-05-13
DAL1077 - 11 2026-07-17
DAL2953 Delta Air Lines 9 2026-05-17
DAL2766 Delta Air Lines 9 2026-07-24
DAL2646 - 9 2026-07-18
DAL1472 Delta Air Lines 9 2026-05-19
DAL2816 - 8 2026-06-25
DAL2785 Delta Air Lines 8 2026-06-13
DAL2314 Delta Air Lines 8 2026-05-18
DAL2283 - 8 2026-07-20
DAL1075 Delta Air Lines 8 2026-07-20
DAL2818 Delta Air Lines 7 2026-05-13
DAL2665 Delta Air Lines 7 2026-05-12
DAL2435 Delta Air Lines 7 2026-05-17
DAL2168 Delta Air Lines 7 2026-05-13
DAL2164 - 7 2026-07-17
DAL946 Delta Air Lines 6 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL946 PHX → DTW Jul 26, 18:45 UTCJul 26, 21:15 UTC2h 30m
2026-07-26 DAL946 PHX → DTW Jul 26, 14:45 UTCJul 26, 17:25 UTC2h 40m
2026-07-26 DAL2742 JAX → BOS Jul 26, 00:10 UTCJul 26, 01:05 UTC55m
2026-07-25 DAL2742 JAX → BOS Jul 25, 22:00 UTCJul 25, 22:45 UTC45m
2026-07-25 DAL2148 MSP → RDU Jul 25, 18:35 UTCJul 25, 20:40 UTC2h 5m
2026-07-25 DAL2148 MSP → RDU Jul 25, 18:33 UTCJul 25, 20:28 UTC1h 55m
2026-07-25 DAL2148 MSP → RDU Jul 25, 15:15 UTCJul 25, 17:05 UTC1h 50m
2026-07-25 DAL2459 LAX → PDX Jul 25, 03:40 UTCJul 25, 05:45 UTC2h 5m
2026-07-25 DAL2459 LAX → PDX Jul 25, 00:05 UTCJul 25, 01:45 UTC1h 40m
2026-07-24 DAL2766 ALB → ATL Jul 24, 20:40 UTCJul 24, 22:45 UTC2h 5m
2026-07-24 DAL2766 ALB → ATL Jul 24, 20:36 UTCJul 24, 22:39 UTC2h 3m
2026-07-24 DAL2766 ALB → ATL Jul 24, 17:05 UTCJul 24, 18:55 UTC1h 50m
2026-07-24 DAL2002 DEN → LAX Jul 24, 13:45 UTCJul 24, 15:45 UTC2h 0m
2026-07-24 DAL2002 DEN → LAX Jul 24, 13:43 UTCJul 24, 15:32 UTC1h 49m
2026-07-24 DAL1644 BOS → ATL Jul 24, 01:50 UTCJul 24, 04:30 UTC2h 40m
2026-07-24 DAL1644 BOS → ATL Jul 24, 01:48 UTCJul 24, 04:24 UTC2h 36m
2026-07-23 DAL2736 AUS → DTW Jul 23, 21:55 UTCJul 24, 00:30 UTC2h 35m
2026-07-23 DAL381 SLC → JFK Jul 23, 17:00 UTCJul 23, 20:10 UTC3h 10m
2026-07-23 DAL381 SLC → JFK Jul 23, 12:25 UTCJul 23, 15:35 UTC3h 10m
2026-07-23 DAL2578 DTW → AUS Jul 23, 00:20 UTCJul 23, 03:05 UTC2h 45m
2026-07-22 DAL645 MEX → DTW Jul 22, 18:50 UTCJul 22, 22:30 UTC3h 40m
2026-07-22 DAL646 DTW → MEX Jul 22, 13:35 UTCJul 22, 17:30 UTC3h 55m
2026-07-22 DAL2898 - Jul 22, 11:10 UTCJul 22, 11:40 UTC30m
2026-07-22 DAL978 LAX → DTW Jul 22, 03:30 UTCJul 22, 04:15 UTC45m
2026-07-21 DAL1407 - Jul 21, 23:45 UTCJul 22, 02:00 UTC2h 15m
2026-07-21 DAL1407 - Jul 21, 20:10 UTCJul 21, 22:10 UTC2h 0m
2026-07-21 DAL2476 DCA → DTW Jul 21, 16:49 UTCJul 21, 18:19 UTC1h 30m
2026-07-21 DAL2476 DCA → DTW Jul 21, 16:50 UTCJul 21, 18:20 UTC1h 30m
2026-07-21 DAL2476 - Jul 21, 14:20 UTCJul 21, 15:30 UTC1h 10m
2026-07-21 DAL2183 DFW → DTW Jul 21, 10:30 UTCJul 21, 12:50 UTC2h 20m
2026-07-21 DAL2183 DFW → DTW Jul 21, 10:30 UTCJul 21, 12:47 UTC2h 17m
2026-07-21 DAL2305 MCO → LGA Jul 21, 00:15 UTCJul 21, 03:40 UTC3h 25m
2026-07-20 DAL1075 SFO → ATL Jul 20, 21:10 UTCJul 20, 22:45 UTC1h 35m
2026-07-20 DAL1075 SFO → ATL Jul 20, 21:07 UTCJul 20, 22:41 UTC1h 34m
2026-07-20 DAL2283 BNH → RDU Jul 20, 17:10 UTCJul 20, 18:45 UTC1h 35m
2026-07-20 DAL2283 BOS → RDU Jul 20, 17:10 UTCJul 20, 18:41 UTC1h 31m
2026-07-20 DAL2351 DCA → MCO Jul 20, 12:25 UTCJul 20, 15:45 UTC3h 20m
2026-07-19 DAL2305 BOS → DFW Jul 19, 23:38 UTCJul 20, 02:57 UTC3h 19m
2026-07-19 DAL2305 BOS → DFW Jul 19, 23:40 UTCJul 20, 03:00 UTC3h 20m
2026-07-19 DAL1075 - Jul 19, 20:20 UTCJul 19, 21:45 UTC1h 25m
2026-07-19 DAL1075 RDU → BOS Jul 19, 20:16 UTCJul 19, 21:44 UTC1h 28m
2026-07-19 DAL2283 BOS → RDU Jul 19, 17:18 UTCJul 19, 18:51 UTC1h 33m
2026-07-19 DAL2283 BOS → RDU Jul 19, 17:20 UTCJul 19, 18:55 UTC1h 35m
2026-07-19 DAL1022 - Jul 19, 14:30 UTCJul 19, 15:55 UTC1h 25m
2026-07-19 DAL2066 BOS → RDU Jul 19, 11:47 UTCJul 19, 13:16 UTC1h 29m
2026-07-19 DAL2066 BOS → RDU Jul 19, 11:50 UTCJul 19, 13:20 UTC1h 30m
2026-07-18 DAL1683 BOS → BOS Jul 18, 12:30 UTCJul 18, 23:00 UTC10h 30m
2026-07-18 DAL2646 ORD → BOS Jul 18, 01:46 UTCJul 18, 03:32 UTC1h 46m
2026-07-18 DAL2646 ORD → BOS Jul 18, 01:50 UTCJul 18, 03:35 UTC1h 46m
2026-07-17 DAL2646 - Jul 17, 21:44 UTCJul 18, 00:04 UTC2h 20m

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 N335NB page for operator, model, and routing details .

Mode-S A3A990 frequently asked

What is Mode-S code A3A990?
A3A990 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N335NB.
Where is Mode-S A3A990 registered?
Mode-S code A3A990 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 A3A990 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3A990, octal 50724620, decimal 10,725,776.
What flights does A3A990 operate?
Mode-S A3A990 has broadcast 20 distinct callsigns, including DAL1281, DAL2659, DAL487, DAL2372, DAL1077.