Apparatus

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sensors Mode-S transponder

AD071D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N939AE · EMBRAER ERJ-145 · operated by AMERICAN AIRLINES INC

Hex
AD071D
Octal
53203435
Decimal
11,339,549
Country
US
Tail
N939AE
Type
E145
No current signal · last broadcast 7d ago
Flights observed
559
Distinct callsigns
20
Country
US
Last broadcast
7d ago

Last known position

Most recent position reported by Mode-S AD071D.

Country allocation

The ICAO 24-bit address AD071D 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
PDT6068 - 13 2026-06-17
PDT6123 Piedmont Airlines 9 2026-06-21
PDT6092 Piedmont Airlines 8 2026-06-04
PDT6026 Piedmont Airlines 8 2026-06-06
PDT5801 - 8 2026-06-19
PDT6033 - 7 2026-06-13
PDT6030 Piedmont Airlines 7 2026-05-26
PDT6014 Piedmont Airlines 7 2026-05-01
PDT5840 - 7 2026-06-23
PDT6013 Piedmont Airlines 6 2026-06-04
PDT5926 Piedmont Airlines 6 2026-06-07
PDT5884 Piedmont Airlines 6 2026-04-28
PDT5845 Piedmont Airlines 6 2026-06-11
PDT5841 Piedmont Airlines 6 2026-05-15
PDT5831 Piedmont Airlines 6 2026-06-15
PDT5824 Piedmont Airlines 6 2026-06-11
PDT5803 - 6 2026-06-16
PDT6134 Piedmont Airlines 5 2026-05-29
PDT6132 - 5 2026-06-21
PDT6130 Piedmont Airlines 5 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-06 PDT9976 - Jul 6, 20:30 UTCJul 6, 22:10 UTC1h 40m
2026-06-25 PDT5965 - Jun 25, 23:44 UTCJun 25, 23:59 UTC15m
2026-06-25 PDT5949 PHL → MDT Jun 25, 22:18 UTCJun 25, 22:52 UTC34m
2026-06-25 PDT5924 - Jun 25, 19:44 UTCJun 25, 20:19 UTC35m
2026-06-25 PDT5924 SYR → PHL Jun 25, 19:39 UTCJun 25, 20:22 UTC43m
2026-06-25 PDT5924 - Jun 25, 17:25 UTCJun 25, 18:04 UTC40m
2026-06-25 PDT5982 - Jun 25, 15:10 UTCJun 25, 15:54 UTC45m
2026-06-25 PDT5982 SYR → PHL Jun 25, 15:06 UTCJun 25, 15:53 UTC47m
2026-06-25 PDT5982 - Jun 25, 13:20 UTCJun 25, 13:59 UTC40m
2026-06-24 PDT5951 - Jun 24, 17:50 UTCJun 24, 19:04 UTC1h 15m
2026-06-24 PDT5951 - Jun 24, 15:24 UTCJun 24, 16:50 UTC1h 25m
2026-06-24 PDT6095 SYR → PHL Jun 24, 13:16 UTCJun 24, 14:00 UTC44m
2026-06-24 PDT6103 - Jun 24, 11:45 UTCJun 24, 12:20 UTC35m
2026-06-24 PDT6108 - Jun 24, 01:34 UTCJun 24, 02:24 UTC50m
2026-06-24 PDT6108 - Jun 24, 00:09 UTCJun 24, 00:55 UTC45m
2026-06-23 PDT5840 - Jun 23, 21:29 UTCJun 23, 22:44 UTC1h 15m
2026-06-23 PDT5840 MHT → PHL Jun 23, 21:29 UTCJun 23, 22:35 UTC1h 6m
2026-06-23 PDT5840 PSQ → MHT Jun 23, 19:04 UTCJun 23, 19:59 UTC55m
2026-06-23 PDT6082 PHL → CVG Jun 23, 16:39 UTCJun 23, 17:39 UTC1h 0m
2026-06-23 PDT6082 PHL → CVG Jun 23, 16:39 UTCJun 23, 17:35 UTC56m
2026-06-23 PDT9976 - Jun 23, 14:39 UTCJun 23, 15:24 UTC45m
2026-06-23 PDT5958 - Jun 23, 10:44 UTCJun 23, 11:40 UTC55m
2026-06-23 PDT9984 - Jun 23, 03:20 UTCJun 23, 04:35 UTC1h 15m
2026-06-23 PDT5837 - Jun 23, 01:45 UTCJun 23, 02:24 UTC40m
2026-06-21 PDT6132 - Jun 21, 20:14 UTCJun 21, 21:34 UTC1h 20m
2026-06-21 PDT6132 GSP → PHL Jun 21, 20:14 UTCJun 21, 21:34 UTC1h 20m
2026-06-21 PDT6132 - Jun 21, 17:54 UTCJun 21, 19:20 UTC1h 25m
2026-06-21 PDT6123 BUF → PHL Jun 21, 15:15 UTCJun 21, 16:34 UTC1h 20m
2026-06-21 PDT6123 BUF → PHL Jun 21, 15:12 UTCJun 21, 16:34 UTC1h 22m
2026-06-21 PDT6123 BUF → PHL Jun 21, 12:55 UTCJun 21, 14:10 UTC1h 15m
2026-06-21 PDT6096 - Jun 21, 09:49 UTCJun 21, 11:15 UTC1h 25m
2026-06-21 PDT6093 - Jun 21, 02:45 UTCJun 21, 03:55 UTC1h 10m
2026-06-20 PDT5952 BDL → PHL Jun 20, 23:10 UTCJun 21, 00:25 UTC1h 15m
2026-06-20 PDT5952 BDL → PHL Jun 20, 20:40 UTCJun 20, 22:05 UTC1h 25m
2026-06-20 PDT6011 YUL → PHL Jun 20, 18:05 UTCJun 20, 19:13 UTC1h 8m
2026-06-20 PDT6011 - Jun 20, 18:10 UTCJun 20, 19:15 UTC1h 5m
2026-06-20 PDT6011 - Jun 20, 15:39 UTCJun 20, 16:49 UTC1h 10m
2026-06-19 PDT5801 - Jun 19, 22:45 UTCJun 19, 23:59 UTC1h 15m
2026-06-19 PDT5801 - Jun 19, 19:49 UTCJun 19, 21:09 UTC1h 20m
2026-06-19 PDT6121 - Jun 19, 17:49 UTCJun 19, 18:34 UTC45m
2026-06-19 PDT6121 - Jun 19, 16:09 UTCJun 19, 16:44 UTC35m
2026-06-19 PDT5829 - Jun 19, 14:49 UTCJun 19, 15:09 UTC20m
2026-06-19 PDT5829 MDT → PHL Jun 19, 14:45 UTCJun 19, 15:08 UTC23m
2026-06-19 PDT5836 - Jun 19, 12:39 UTCJun 19, 13:44 UTC1h 5m
2026-06-18 PDT6049 - Jun 18, 00:15 UTCJun 18, 00:55 UTC40m
2026-06-17 PDT6049 - Jun 17, 22:35 UTCJun 17, 23:15 UTC40m
2026-06-17 PDT5932 BUF → PHL Jun 17, 19:30 UTCJun 17, 20:35 UTC1h 5m
2026-06-17 PDT5932 BUF → PHL Jun 17, 17:40 UTCJun 17, 18:45 UTC1h 5m
2026-06-17 PDT6068 - Jun 17, 15:46 UTCJun 17, 16:30 UTC45m
2026-06-17 PDT6068 - Jun 17, 14:20 UTCJun 17, 14:50 UTC30m

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 N939AE page for operator, model, and routing details .

Mode-S AD071D frequently asked

What is Mode-S code AD071D?
AD071D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N939AE.
Where is Mode-S AD071D registered?
Mode-S code AD071D 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 AD071D broadcasting right now?
No active broadcast right now. Last signal was 7d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD071D, octal 53203435, decimal 11,339,549.
What flights does AD071D operate?
Mode-S AD071D has broadcast 20 distinct callsigns, including PDT6068, PDT6123, PDT6092, PDT6026, PDT5801.