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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 1h ago
Flights observed
801
Distinct callsigns
20
Country
US
Last broadcast
1h ago

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
PDT5793 - 11 2026-07-12
PDT6113 Piedmont Airlines 8 2026-05-12
PDT6028 - 8 2026-07-06
PDT5965 - 8 2026-06-23
PDT5875 - 8 2026-07-02
PDT5869 - 8 2026-07-11
PDT5843 - 8 2026-07-05
PDT5824 - 8 2026-06-28
PDT6024 Piedmont Airlines 7 2026-05-25
PDT5990 - 7 2026-06-22
PDT5962 Piedmont Airlines 7 2026-06-22
PDT5945 Piedmont Airlines 7 2026-05-29
PDT5901 - 7 2026-07-05
PDT5867 - 7 2026-07-14
PDT5863 - 7 2026-07-08
PDT5792 - 7 2026-06-29
PDT6121 - 6 2026-07-04
PDT6097 Piedmont Airlines 6 2026-05-02
PDT6082 Piedmont Airlines 6 2026-06-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 PDT5932 - Jul 14, 19:35 UTCJul 14, 20:15 UTC40m
2026-07-14 PDT5932 - Jul 14, 17:30 UTCJul 14, 18:30 UTC1h 0m
2026-07-14 PDT6073 - Jul 14, 15:15 UTCJul 14, 15:55 UTC40m
2026-07-14 PDT6073 LYH → CLT Jul 14, 15:13 UTCJul 14, 15:51 UTC38m
2026-07-14 PDT6073 - Jul 14, 13:30 UTCJul 14, 14:00 UTC30m
2026-07-14 PDT5955 - Jul 14, 10:30 UTCJul 14, 11:10 UTC40m
2026-07-14 PDT5971 - Jul 14, 03:05 UTCJul 14, 03:40 UTC35m
2026-07-14 PDT5867 - Jul 14, 01:00 UTCJul 14, 02:00 UTC1h 0m
2026-07-13 PDT5867 - Jul 13, 23:30 UTCJul 14, 00:20 UTC50m
2026-07-13 PDT5797 - Jul 13, 21:20 UTCJul 13, 21:55 UTC35m
2026-07-13 PDT5797 - Jul 13, 19:40 UTCJul 13, 20:00 UTC20m
2026-07-13 PDT6068 - Jul 13, 15:05 UTCJul 13, 15:45 UTC40m
2026-07-13 PDT6068 EWN → CLT Jul 13, 14:56 UTCJul 13, 15:44 UTC48m
2026-07-13 PDT6068 - Jul 13, 13:25 UTCJul 13, 13:55 UTC30m
2026-07-13 PDT5933 - Jul 13, 11:10 UTCJul 13, 12:00 UTC50m
2026-07-13 PDT5834 - Jul 13, 00:35 UTCJul 13, 01:15 UTC40m
2026-07-12 PDT5845 - Jul 12, 21:40 UTCJul 12, 23:15 UTC1h 35m
2026-07-12 PDT5845 - Jul 12, 19:20 UTCJul 12, 20:40 UTC1h 20m
2026-07-12 PDT5890 - Jul 12, 17:05 UTCJul 12, 17:50 UTC45m
2026-07-12 PDT5890 SAV → CLT Jul 12, 17:04 UTCJul 12, 17:49 UTC45m
2026-07-12 PDT5890 - Jul 12, 15:35 UTCJul 12, 16:15 UTC40m
2026-07-12 PDT5793 - Jul 12, 13:15 UTCJul 12, 13:35 UTC20m
2026-07-12 PDT5793 - Jul 12, 11:55 UTCJul 12, 12:15 UTC20m
2026-07-12 PDT6006 - Jul 12, 09:20 UTCJul 12, 10:05 UTC45m
2026-07-12 PDT5986 - Jul 12, 02:45 UTCJul 12, 03:20 UTC35m
2026-07-12 PDT5986 CLT → PGV Jul 12, 02:45 UTCJul 12, 03:20 UTC35m
2026-07-12 PDT5867 - Jul 12, 00:10 UTCJul 12, 01:00 UTC50m
2026-07-11 PDT5867 - Jul 11, 22:30 UTCJul 11, 23:15 UTC45m
2026-07-11 PDT5797 - Jul 11, 20:30 UTCJul 11, 20:50 UTC20m
2026-07-11 PDT5797 GSO → CLT Jul 11, 20:28 UTCJul 11, 20:51 UTC23m
2026-07-11 PDT5797 - Jul 11, 19:00 UTCJul 11, 19:20 UTC20m
2026-07-11 PDT5869 - Jul 11, 15:50 UTCJul 11, 16:45 UTC55m
2026-07-11 PDT5869 - Jul 11, 13:50 UTCJul 11, 14:40 UTC50m
2026-07-11 PDT5967 - Jul 11, 10:40 UTCJul 11, 11:35 UTC55m
2026-07-11 PDT5865 - Jul 11, 03:25 UTCJul 11, 04:20 UTC55m
2026-07-11 PDT5927 - Jul 11, 00:50 UTCJul 11, 01:55 UTC1h 5m
2026-07-10 PDT5927 - Jul 10, 23:10 UTCJul 11, 00:10 UTC1h 0m
2026-07-10 PDT5868 - Jul 10, 21:05 UTCJul 10, 22:00 UTC55m
2026-07-10 PDT5868 - Jul 10, 17:40 UTCJul 10, 18:35 UTC55m
2026-07-10 PDT5786 - Jul 10, 14:50 UTCJul 10, 16:00 UTC1h 10m
2026-07-10 PDT5829 - Jul 10, 13:45 UTCJul 10, 14:00 UTC15m
2026-07-10 PDT5873 - Jul 10, 09:35 UTCJul 10, 10:25 UTC50m
2026-07-10 PDT9987 - Jul 10, 00:15 UTCJul 10, 00:40 UTC25m
2026-07-09 PDT5837 - Jul 9, 22:10 UTCJul 9, 22:50 UTC40m
2026-07-09 PDT6031 FWA → PHL Jul 9, 14:55 UTCJul 9, 16:25 UTC1h 30m
2026-07-09 PDT6031 FWA → PHL Jul 9, 14:50 UTCJul 9, 16:19 UTC1h 29m
2026-07-09 PDT6030 - Jul 9, 13:25 UTCJul 9, 13:45 UTC20m
2026-07-09 PDT5872 - Jul 9, 09:30 UTCJul 9, 10:40 UTC1h 10m
2026-07-09 PDT5977 - Jul 9, 01:40 UTCJul 9, 02:55 UTC1h 15m
2026-07-09 PDT5977 CLT → ERI Jul 9, 01:38 UTCJul 9, 03:01 UTC1h 23m

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 1h ago.
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, PDT5793, PDT6113, PDT6028, PDT5965.