Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A3F4D7

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N354NB · AIRBUS A-319 · operated by DELTA AIR LINES INC

Hex
A3F4D7
Octal
50772327
Decimal
10,745,047
Country
US
Tail
N354NB
Type
A319
No current signal · last broadcast Jul 26, 21:40 UTC
Flights observed
540
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:40 UTC

Last known position

Most recent position reported by Mode-S A3F4D7.

Country allocation

The ICAO 24-bit address A3F4D7 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 Delta Air Lines 11 2026-05-30
DAL1438 - 11 2026-06-27
DAL2682 Delta Air Lines 10 2026-07-24
DAL521 Delta Air Lines 8 2026-07-26
DAL2598 Delta Air Lines 8 2026-07-22
DAL2568 Delta Air Lines 8 2026-07-22
DAL2314 - 8 2026-07-06
DAL1557 Delta Air Lines 8 2026-06-17
DAL1006 - 8 2026-07-09
DAL890 - 7 2026-06-15
DAL642 Delta Air Lines 7 2026-05-30
DAL2888 Delta Air Lines 7 2026-06-15
DAL2632 Delta Air Lines 7 2026-06-12
DAL2421 Delta Air Lines 7 2026-05-23
DAL950 - 6 2026-07-03
DAL948 - 6 2026-06-26
DAL920 - 6 2026-06-24
DAL2975 Delta Air Lines 6 2026-04-18
DAL2030 - 6 2026-06-17
DAL1729 Delta Air Lines 6 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL521 SFO → JFK Jul 26, 19:05 UTCJul 26, 21:40 UTC2h 35m
2026-07-26 DAL521 SFO → JFK Jul 26, 14:40 UTCJul 26, 17:25 UTC2h 45m
2026-07-26 DAL2551 LAX → PDX Jul 26, 03:30 UTCJul 26, 05:35 UTC2h 5m
2026-07-26 DAL2551 LAX → PDX Jul 26, 00:35 UTCJul 26, 02:20 UTC1h 45m
2026-07-25 DAL2766 ALB → ATL Jul 25, 20:55 UTCJul 25, 22:55 UTC2h 0m
2026-07-25 DAL2766 ALB → ATL Jul 25, 17:10 UTCJul 25, 18:55 UTC1h 45m
2026-07-25 DAL2002 DEN → LAX Jul 25, 13:50 UTCJul 25, 15:40 UTC1h 50m
2026-07-25 DAL1729 SAV → ATL Jul 25, 03:35 UTCJul 25, 05:30 UTC1h 55m
2026-07-25 DAL1729 SAV → ATL Jul 25, 03:32 UTCJul 25, 05:38 UTC2h 6m
2026-07-24 DAL2588 MSP → EWR Jul 24, 22:15 UTCJul 25, 00:50 UTC2h 35m
2026-07-24 DAL2588 MSP → EWR Jul 24, 22:11 UTCJul 25, 00:42 UTC2h 31m
2026-07-24 DAL2458 PDX → SLC Jul 24, 18:00 UTCJul 24, 20:40 UTC2h 40m
2026-07-24 DAL2458 PDX → SLC Jul 24, 17:56 UTCJul 24, 20:31 UTC2h 35m
2026-07-24 DAL2682 BNA → DTW Jul 24, 15:10 UTCJul 24, 16:20 UTC1h 10m
2026-07-24 DAL2682 BNA → DTW Jul 24, 12:45 UTCJul 24, 14:00 UTC1h 15m
2026-07-24 DAL1752 DTW → MBJ Jul 24, 10:15 UTCJul 24, 11:05 UTC50m
2026-07-24 DAL3148 JAX → JFK Jul 24, 01:45 UTCJul 24, 02:30 UTC45m
2026-07-23 DAL1407 BNA → BOS Jul 23, 23:10 UTCJul 24, 00:30 UTC1h 20m
2026-07-23 DAL1407 BNA → BOS Jul 23, 20:25 UTCJul 23, 21:45 UTC1h 20m
2026-07-23 DAL2343 RDU → BOS Jul 23, 17:25 UTCJul 23, 18:50 UTC1h 25m
2026-07-23 DAL2751 LGA → TPA Jul 23, 14:25 UTCJul 23, 15:40 UTC1h 15m
2026-07-23 DAL1389 IAH → DTW Jul 23, 10:35 UTCJul 23, 13:00 UTC2h 25m
2026-07-23 DAL1389 IAH → DTW Jul 23, 10:34 UTCJul 23, 12:58 UTC2h 24m
2026-07-23 DAL1633 DTW → IAH Jul 23, 01:40 UTCJul 23, 03:55 UTC2h 15m
2026-07-22 DAL2598 ATL → PIT Jul 22, 21:10 UTCJul 22, 23:45 UTC2h 35m
2026-07-22 DAL2598 ATL → PIT Jul 22, 21:07 UTCJul 22, 23:46 UTC2h 39m
2026-07-22 DAL2568 SFO → MSP Jul 22, 17:20 UTCJul 22, 19:50 UTC2h 30m
2026-07-22 DAL1354 IAD → ATL Jul 22, 12:50 UTCJul 22, 15:35 UTC2h 45m
2026-07-22 DAL2243 JFK → MIA Jul 22, 01:30 UTCJul 22, 04:30 UTC3h 0m
2026-07-22 DAL2243 JFK → MIA Jul 22, 01:28 UTCJul 22, 04:28 UTC3h 0m
2026-07-21 DAL1517 - Jul 21, 21:00 UTCJul 21, 23:55 UTC2h 55m
2026-07-21 DAL1517 - Jul 21, 16:45 UTCJul 21, 19:40 UTC2h 55m
2026-07-21 DAL1216 - Jul 21, 12:20 UTCJul 21, 15:10 UTC2h 50m
2026-07-21 DAL1633 DTW → IAH Jul 21, 00:35 UTCJul 21, 02:45 UTC2h 10m
2026-07-20 DAL1865 - Jul 20, 20:40 UTCJul 20, 23:05 UTC2h 25m
2026-07-20 DAL1864 - Jul 20, 16:55 UTCJul 20, 19:05 UTC2h 10m
2026-07-20 DAL1558 DCA → DTW Jul 20, 13:50 UTCJul 20, 15:00 UTC1h 10m
2026-07-20 DAL1558 - Jul 20, 11:10 UTCJul 20, 12:10 UTC1h 0m
2026-07-20 DAL1096 ATL → YUL Jul 20, 07:10 UTCJul 20, 09:25 UTC2h 15m
2026-07-20 DAL1644 BOS → ATL Jul 20, 02:10 UTCJul 20, 04:35 UTC2h 25m
2026-07-19 DAL1407 - Jul 19, 23:10 UTCJul 20, 00:25 UTC1h 15m
2026-07-19 DAL1407 RDU → DTW Jul 19, 23:09 UTCJul 20, 00:24 UTC1h 15m
2026-07-19 DAL1407 - Jul 19, 20:25 UTCJul 19, 21:35 UTC1h 10m
2026-07-19 DAL1389 - Jul 19, 11:45 UTCJul 19, 14:00 UTC2h 15m
2026-07-19 DAL1633 DTW → IAH Jul 19, 00:50 UTCJul 19, 03:25 UTC2h 35m
2026-07-19 DAL1633 DTW → IAH Jul 19, 00:49 UTCJul 19, 03:15 UTC2h 26m
2026-07-18 DAL1865 - Jul 18, 21:10 UTCJul 18, 23:35 UTC2h 25m
2026-07-18 DAL1143 - Jul 18, 16:20 UTCJul 18, 19:15 UTC2h 55m
2026-07-18 DAL439 DFW → LAX Jul 18, 12:15 UTCJul 18, 14:50 UTC2h 35m
2026-07-17 DAL2305 BOS → DFW Jul 17, 23:31 UTCJul 18, 02:56 UTC3h 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 N354NB page for operator, model, and routing details .

Mode-S A3F4D7 frequently asked

What is Mode-S code A3F4D7?
A3F4D7 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N354NB.
Where is Mode-S A3F4D7 registered?
Mode-S code A3F4D7 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 A3F4D7 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3F4D7, octal 50772327, decimal 10,745,047.
What flights does A3F4D7 operate?
Mode-S A3F4D7 has broadcast 20 distinct callsigns, including DAL628, DAL1438, DAL2682, DAL521, DAL2598.