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sensors Mode-S transponder

A91E11

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N687JS · EMBRAER ERJ-145 · operated by AMERICAN AIRLINES INC

Hex
A91E11
Octal
52217021
Decimal
11,083,281
Country
US
Tail
N687JS
Type
E145
No current signal · last broadcast Jul 26, 19:50 UTC
Flights observed
905
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 19:50 UTC

Last known position

Most recent position reported by Mode-S A91E11.

Country allocation

The ICAO 24-bit address A91E11 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
PDT5974 - 16 2026-07-04
PDT6028 Piedmont Airlines 11 2026-07-26
PDT5793 - 11 2026-07-12
PDT5869 - 10 2026-07-20
PDT5824 - 10 2026-07-17
PDT6078 Piedmont Airlines 9 2026-07-24
PDT6051 Piedmont Airlines 9 2026-07-19
PDT5867 - 9 2026-07-15
PDT6113 Piedmont Airlines 8 2026-05-12
PDT6075 - 8 2026-07-19
PDT5965 - 8 2026-06-23
PDT5902 Piedmont Airlines 8 2026-07-21
PDT5875 - 8 2026-07-02
PDT5843 - 8 2026-07-05
PDT5838 Piedmont Airlines 8 2026-07-22
PDT6102 Piedmont Airlines 7 2026-07-24
PDT6097 - 7 2026-07-19
PDT6033 - 7 2026-07-18
PDT6024 Piedmont Airlines 7 2026-05-25
PDT5991 - 7 2026-07-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 PDT6028 ILM → PHL Jul 26, 19:05 UTCJul 26, 19:50 UTC45m
2026-07-26 PDT6028 ILM → PHL Jul 26, 19:00 UTCJul 26, 19:47 UTC47m
2026-07-26 PDT6028 ILM → PHL Jul 26, 17:25 UTCJul 26, 18:05 UTC40m
2026-07-26 PDT5894 SAV → PHL Jul 26, 15:15 UTCJul 26, 15:53 UTC38m
2026-07-26 PDT5894 SAV → PHL Jul 26, 13:45 UTCJul 26, 14:25 UTC40m
2026-07-26 PDT5854 ALB → PHL Jul 26, 10:35 UTCJul 26, 11:25 UTC50m
2026-07-26 PDT5850 GSP → PHL Jul 26, 00:10 UTCJul 26, 00:55 UTC45m
2026-07-26 PDT5850 GSP → PHL Jul 26, 00:08 UTCJul 26, 01:09 UTC1h 1m
2026-07-25 PDT6025 BOS → ROC Jul 25, 20:40 UTCJul 25, 21:45 UTC1h 5m
2026-07-25 PDT6023 SYR → PHL Jul 25, 17:50 UTCJul 25, 19:00 UTC1h 10m
2026-07-25 PDT6023 SYR → PHL Jul 25, 17:47 UTCJul 25, 18:58 UTC1h 11m
2026-07-25 PDT5908 MHT → PHL Jul 25, 15:25 UTCJul 25, 16:35 UTC1h 10m
2026-07-25 PDT5799 BOS → ROC Jul 25, 14:05 UTCJul 25, 14:30 UTC25m
2026-07-25 PDT5799 BOS → ROC Jul 25, 14:00 UTCJul 25, 14:25 UTC25m
2026-07-25 PDT5992 GSP → PHL Jul 25, 11:30 UTCJul 25, 12:10 UTC40m
2026-07-25 PDT5992 GSP → PHL Jul 25, 11:28 UTCJul 25, 12:18 UTC50m
2026-07-25 PDT5912 PHL → MDT Jul 25, 01:15 UTCJul 25, 01:40 UTC25m
2026-07-24 PDT6078 PIT → PHL Jul 24, 21:55 UTCJul 24, 22:15 UTC20m
2026-07-24 PDT6078 PIT → PHL Jul 24, 21:47 UTCJul 24, 23:02 UTC1h 15m
2026-07-24 PDT6078 PIT → PHL Jul 24, 19:40 UTCJul 24, 20:45 UTC1h 5m
2026-07-24 PDT6072 ROA → PHL Jul 24, 13:15 UTCJul 24, 13:45 UTC30m
2026-07-24 PDT6072 ROA → PHL Jul 24, 11:50 UTCJul 24, 12:10 UTC20m
2026-07-24 PDT6004 DAY → PHL Jul 24, 09:30 UTCJul 24, 09:50 UTC20m
2026-07-24 PDT5893 CLT → FLO Jul 24, 03:40 UTCJul 24, 03:55 UTC15m
2026-07-24 PDT6102 PHL → GSO Jul 24, 00:55 UTCJul 24, 02:05 UTC1h 10m
2026-07-23 PDT6102 PHL → GSO Jul 23, 22:35 UTCJul 23, 23:35 UTC1h 0m
2026-07-23 PDT5809 SAV → PHL Jul 23, 20:35 UTCJul 23, 21:10 UTC35m
2026-07-23 PDT5809 SAV → PHL Jul 23, 20:25 UTCJul 23, 21:08 UTC43m
2026-07-23 PDT5809 SAV → PHL Jul 23, 18:10 UTCJul 23, 18:40 UTC30m
2026-07-23 PDT5916 - Jul 23, 16:00 UTCJul 23, 17:05 UTC1h 5m
2026-07-23 PDT5916 - Jul 23, 13:45 UTCJul 23, 15:05 UTC1h 20m
2026-07-23 PDT5967 PVD → PHL Jul 23, 10:40 UTCJul 23, 11:45 UTC1h 5m
2026-07-23 PDT5865 CLT → MGM Jul 23, 03:10 UTCJul 23, 04:05 UTC55m
2026-07-23 PDT5804 MHT → PHL Jul 23, 00:25 UTCJul 23, 01:10 UTC45m
2026-07-22 PDT5804 MHT → PHL Jul 22, 22:45 UTCJul 22, 23:10 UTC25m
2026-07-22 PDT5831 CLT → TRI Jul 22, 20:30 UTCJul 22, 21:00 UTC30m
2026-07-22 PDT5831 CLT → TRI Jul 22, 20:24 UTCJul 22, 21:00 UTC36m
2026-07-22 PDT5831 CLT → TRI Jul 22, 18:50 UTCJul 22, 19:25 UTC35m
2026-07-22 PDT5838 PHL → RDU Jul 22, 15:45 UTCJul 22, 16:15 UTC30m
2026-07-22 PDT5838 PHL → RDU Jul 22, 15:38 UTCJul 22, 17:12 UTC1h 34m
2026-07-22 PDT5838 PHL → RDU Jul 22, 13:15 UTCJul 22, 14:30 UTC1h 15m
2026-07-22 PDT5909 ERI → CLT Jul 22, 01:35 UTCJul 22, 02:10 UTC35m
2026-07-21 PDT5902 CMH → ORD Jul 21, 22:15 UTCJul 21, 23:30 UTC1h 15m
2026-07-21 PDT5902 CMH → ORD Jul 21, 20:15 UTCJul 21, 21:15 UTC1h 0m
2026-07-21 PDT6127 PHF → CLT Jul 21, 17:40 UTCJul 21, 18:20 UTC40m
2026-07-21 PDT6127 PHF → CLT Jul 21, 15:55 UTCJul 21, 16:40 UTC45m
2026-07-21 PDT6016 PHL → MDT Jul 21, 13:05 UTCJul 21, 13:35 UTC30m
2026-07-21 PDT6016 PHL → MDT Jul 21, 11:40 UTCJul 21, 12:10 UTC30m
2026-07-21 PDT5985 PHL → BUF Jul 21, 09:10 UTCJul 21, 10:00 UTC50m
2026-07-21 PDT5938 ORF → PHL Jul 21, 03:25 UTCJul 21, 04:25 UTC1h 0m

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 N687JS page for operator, model, and routing details .

Mode-S A91E11 frequently asked

What is Mode-S code A91E11?
A91E11 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N687JS.
Where is Mode-S A91E11 registered?
Mode-S code A91E11 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 A91E11 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A91E11, octal 52217021, decimal 11,083,281.
What flights does A91E11 operate?
Mode-S A91E11 has broadcast 20 distinct callsigns, including PDT5974, PDT6028, PDT5793, PDT5869, PDT5824.