Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A3DF1E

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N349DX · AIRBUS A-321 · operated by BANK OF UTAH TRUSTEE

Hex
A3DF1E
Octal
50757436
Decimal
10,739,486
Country
US
Tail
N349DX
Type
A321
No current signal · last broadcast Jul 26, 21:30 UTC
Flights observed
567
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:30 UTC

Last known position

Most recent position reported by Mode-S A3DF1E.

Country allocation

The ICAO 24-bit address A3DF1E 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
DAL1167 - 10 2026-07-11
DAL1670 Delta Air Lines 9 2026-07-21
DAL665 Delta Air Lines 8 2026-06-12
DAL2325 Delta Air Lines 8 2026-07-21
DAL1946 - 8 2026-07-17
DAL1266 - 7 2026-07-09
DAL839 - 6 2026-07-19
DAL838 - 6 2026-07-13
DAL2720 - 6 2026-07-07
DAL2627 Delta Air Lines 6 2026-06-05
DAL1709 Delta Air Lines 6 2026-05-31
DAL1397 Delta Air Lines 6 2026-07-19
DAL1137 - 6 2026-06-22
DAL1094 Delta Air Lines 6 2026-07-06
DAL893 - 5 2026-07-08
DAL664 Delta Air Lines 5 2026-07-23
DAL2871 - 5 2026-06-19
DAL2279 Delta Air Lines 5 2026-07-20
DAL2270 - 5 2026-07-10
DAL2269 - 5 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL877 LGA → ATL Jul 26, 20:45 UTCJul 26, 21:30 UTC45m
2026-07-26 DAL2901 ATL → MSP Jul 26, 17:10 UTCJul 26, 19:20 UTC2h 10m
2026-07-26 DAL2901 ATL → MSP Jul 26, 17:09 UTCJul 26, 19:16 UTC2h 7m
2026-07-26 DAL2365 MSP → SFO Jul 26, 12:45 UTCJul 26, 14:25 UTC1h 40m
2026-07-25 DAL2340 MCI → DTW Jul 25, 20:20 UTCJul 25, 22:10 UTC1h 50m
2026-07-25 DAL761 TPA → LGA Jul 25, 14:15 UTCJul 25, 18:15 UTC4h 0m
2026-07-25 DAL779 BOS → MSP Jul 25, 01:35 UTCJul 25, 05:25 UTC3h 50m
2026-07-24 DAL2266 EWR → ATL Jul 24, 22:25 UTCJul 25, 00:05 UTC1h 40m
2026-07-24 DAL2266 EWR → ATL Jul 24, 18:15 UTCJul 24, 20:00 UTC1h 45m
2026-07-24 DAL1227 IAH → LGA Jul 24, 15:30 UTCJul 24, 16:35 UTC1h 5m
2026-07-24 DAL1227 IAH → LGA Jul 24, 12:50 UTCJul 24, 13:55 UTC1h 5m
2026-07-24 DAL1269 BOS → TPA Jul 24, 09:30 UTCJul 24, 11:05 UTC1h 35m
2026-07-24 DAL2642 ATL → PHL Jul 24, 03:25 UTCJul 24, 04:55 UTC1h 30m
2026-07-24 DAL1491 CHS → BOS Jul 24, 00:00 UTCJul 24, 01:50 UTC1h 50m
2026-07-23 DAL1491 CHS → BOS Jul 23, 20:15 UTCJul 23, 22:05 UTC1h 50m
2026-07-23 DAL664 SFO → JFK Jul 23, 17:30 UTCJul 23, 18:30 UTC1h 0m
2026-07-23 DAL664 SFO → JFK Jul 23, 17:25 UTCJul 23, 18:28 UTC1h 3m
2026-07-23 DAL664 SFO → JFK Jul 23, 15:00 UTCJul 23, 16:00 UTC1h 0m
2026-07-23 DAL1211 BUF → BOS Jul 23, 11:25 UTCJul 23, 12:50 UTC1h 25m
2026-07-23 DAL1211 BUF → BOS Jul 23, 11:24 UTCJul 23, 12:48 UTC1h 24m
2026-07-23 DAL1589 ORD → BOS Jul 23, 03:05 UTCJul 23, 04:30 UTC1h 25m
2026-07-23 DAL1589 ORD → BOS Jul 23, 03:03 UTCJul 23, 04:31 UTC1h 28m
2026-07-22 DAL1742 ATL → SJC Jul 22, 23:10 UTCJul 23, 00:20 UTC1h 10m
2026-07-22 DAL1742 ATL → SJC Jul 22, 20:20 UTCJul 22, 21:25 UTC1h 5m
2026-07-22 DAL2650 BOS → BNA Jul 22, 17:20 UTCJul 22, 18:35 UTC1h 15m
2026-07-22 DAL2650 BOS → BNA Jul 22, 14:27 UTCJul 22, 15:41 UTC1h 14m
2026-07-22 DAL2650 BOS → BNA Jul 22, 14:30 UTCJul 22, 15:40 UTC1h 10m
2026-07-22 DAL1515 JFK → MCO Jul 22, 11:10 UTCJul 22, 12:45 UTC1h 35m
2026-07-22 DAL2138 ATL → PWM Jul 22, 02:05 UTCJul 22, 04:05 UTC2h 0m
2026-07-21 DAL3152 SDF → ATL Jul 21, 23:30 UTCJul 22, 00:40 UTC1h 10m
2026-07-21 DAL3152 SDF → ATL Jul 21, 20:40 UTCJul 21, 22:05 UTC1h 25m
2026-07-21 DAL2325 ALB → ATL Jul 21, 16:55 UTCJul 21, 19:10 UTC2h 15m
2026-07-21 DAL2325 ALB → ATL Jul 21, 11:50 UTCJul 21, 13:35 UTC1h 45m
2026-07-21 DAL1670 PHL → MSP Jul 21, 01:45 UTCJul 21, 03:15 UTC1h 30m
2026-07-20 DAL1670 PHL → MSP Jul 20, 22:40 UTCJul 21, 00:15 UTC1h 35m
2026-07-20 DAL2279 ATL → PHL Jul 20, 19:00 UTCJul 20, 20:25 UTC1h 25m
2026-07-20 DAL2279 ATL → PHL Jul 20, 16:05 UTCJul 20, 17:35 UTC1h 30m
2026-07-20 DAL2662 YYZ → ATL Jul 20, 12:45 UTCJul 20, 14:15 UTC1h 30m
2026-07-20 DAL2422 JFK → PHX Jul 20, 02:40 UTCJul 20, 04:25 UTC1h 45m
2026-07-19 DAL1397 FLL → BOS Jul 19, 23:15 UTCJul 20, 01:05 UTC1h 50m
2026-07-19 DAL1397 FLL → BOS Jul 19, 19:35 UTCJul 19, 21:35 UTC2h 0m
2026-07-19 DAL839 DFW → ATL Jul 19, 15:20 UTCJul 19, 17:05 UTC1h 45m
2026-07-19 DAL839 ATL → DFW Jul 19, 11:55 UTCJul 19, 13:40 UTC1h 45m
2026-07-19 DAL1742 ATL → SJC Jul 19, 01:15 UTCJul 19, 02:20 UTC1h 5m
2026-07-18 DAL1742 ATL → SJC Jul 18, 21:35 UTCJul 18, 22:40 UTC1h 5m
2026-07-18 DAL664 MCO → ATL Jul 18, 18:00 UTCJul 18, 19:00 UTC1h 0m
2026-07-18 DAL664 ATL → MCO Jul 18, 14:55 UTCJul 18, 16:00 UTC1h 5m
2026-07-18 DAL1152 MSP → SFO Jul 18, 12:00 UTCJul 18, 13:26 UTC1h 26m
2026-07-18 DAL1152 MSP → SFO Jul 18, 12:00 UTCJul 18, 13:30 UTC1h 30m
2026-07-18 DAL2065 ATL → PHL Jul 18, 03:00 UTCJul 18, 04:35 UTC1h 35m

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 N349DX page for operator, model, and routing details .

Mode-S A3DF1E frequently asked

What is Mode-S code A3DF1E?
A3DF1E is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N349DX.
Where is Mode-S A3DF1E registered?
Mode-S code A3DF1E 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 A3DF1E broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3DF1E, octal 50757436, decimal 10,739,486.
What flights does A3DF1E operate?
Mode-S A3DF1E has broadcast 20 distinct callsigns, including DAL1167, DAL1670, DAL665, DAL2325, DAL1946.