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sensors Mode-S transponder

A91986

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N686AE · EMBRAER ERJ-145 · operated by AMERICAN AIRLINES INC

Hex
A91986
Octal
52214606
Decimal
11,082,118
Country
US
Tail
N686AE
Type
E145
No current signal · last broadcast Jul 26, 20:40 UTC
Flights observed
923
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:40 UTC

Last known position

Most recent position reported by Mode-S A91986.

Country allocation

The ICAO 24-bit address A91986 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
PDT5992 Piedmont Airlines 15 2026-05-19
PDT5927 - 14 2026-07-18
PDT6034 Piedmont Airlines 11 2026-07-25
PDT5941 Piedmont Airlines 11 2026-06-03
PDT5920 Piedmont Airlines 11 2026-07-26
PDT6032 - 10 2026-06-25
PDT5878 Piedmont Airlines 10 2026-06-13
PDT5846 - 10 2026-07-11
PDT5807 Piedmont Airlines 10 2026-06-10
PDT6062 - 9 2026-07-20
PDT5868 Piedmont Airlines 9 2026-07-18
PDT5796 Piedmont Airlines 9 2026-06-30
PDT6126 - 8 2026-07-09
PDT6116 - 8 2026-06-27
PDT6083 Piedmont Airlines 8 2026-07-26
PDT6051 - 8 2026-06-30
PDT6038 - 8 2026-07-13
PDT5972 - 8 2026-07-01
PDT5970 - 8 2026-07-01
PDT5951 Piedmont Airlines 8 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 PDT5859 PHL → BGR Jul 26, 19:55 UTCJul 26, 20:35 UTC40m
2026-07-26 PDT5859 PHL → BGR Jul 26, 18:25 UTCJul 26, 19:05 UTC40m
2026-07-26 PDT5920 PHL → ART Jul 26, 17:00 UTCJul 26, 17:25 UTC25m
2026-07-26 PDT5920 PHL → ART Jul 26, 16:53 UTCJul 26, 17:22 UTC29m
2026-07-26 PDT5920 PHL → ART Jul 26, 15:25 UTCJul 26, 15:55 UTC30m
2026-07-26 PDT6081 ORF → PHL Jul 26, 12:10 UTCJul 26, 13:05 UTC55m
2026-07-26 PDT6083 CAE → PHL Jul 26, 02:10 UTCJul 26, 03:10 UTC1h 0m
2026-07-26 PDT6083 CAE → PHL Jul 26, 02:08 UTCJul 26, 03:20 UTC1h 12m
2026-07-25 PDT6034 PHL → BUF Jul 25, 23:30 UTCJul 26, 00:45 UTC1h 15m
2026-07-25 PDT6034 PHL → BUF Jul 25, 21:00 UTCJul 25, 22:10 UTC1h 10m
2026-07-25 PDT5951 PHL → BUF Jul 25, 17:50 UTCJul 25, 19:15 UTC1h 25m
2026-07-25 PDT5951 PHL → BUF Jul 25, 17:47 UTCJul 25, 19:10 UTC1h 23m
2026-07-25 PDT5951 PHL → BUF Jul 25, 15:20 UTCJul 25, 16:40 UTC1h 20m
2026-07-25 PDT6081 ORF → PHL Jul 25, 12:55 UTCJul 25, 14:00 UTC1h 5m
2026-07-25 PDT6083 CAE → PHL Jul 25, 02:05 UTCJul 25, 03:05 UTC1h 0m
2026-07-24 PDT6034 PHL → BUF Jul 24, 23:20 UTCJul 25, 00:30 UTC1h 10m
2026-07-24 PDT6034 PHL → BUF Jul 24, 20:45 UTCJul 24, 22:00 UTC1h 15m
2026-07-24 PDT5951 PHL → BUF Jul 24, 18:10 UTCJul 24, 19:40 UTC1h 30m
2026-07-24 PDT5951 PHL → BUF Jul 24, 18:05 UTCJul 24, 19:30 UTC1h 25m
2026-07-24 PDT5951 PHL → BUF Jul 24, 15:50 UTCJul 24, 17:15 UTC1h 25m
2026-07-24 PDT9978 PHL → MDT Jul 24, 14:15 UTCJul 24, 14:30 UTC15m
2026-07-22 PDT6031 - Jul 22, 15:20 UTCJul 22, 16:35 UTC1h 15m
2026-07-22 PDT6030 PHL → CVG Jul 22, 13:30 UTCJul 22, 13:55 UTC25m
2026-07-22 PDT6098 PHL → MDT Jul 22, 11:10 UTCJul 22, 11:55 UTC45m
2026-07-22 PDT6015 - Jul 22, 01:30 UTCJul 22, 02:00 UTC30m
2026-07-22 PDT6015 CLT → EWN Jul 22, 01:26 UTCJul 22, 02:03 UTC37m
2026-07-21 PDT6130 - Jul 21, 22:20 UTCJul 21, 22:55 UTC35m
2026-07-21 PDT6130 - Jul 21, 20:50 UTCJul 21, 21:20 UTC30m
2026-07-21 PDT5785 PHL → PWM Jul 21, 17:50 UTCJul 21, 18:55 UTC1h 5m
2026-07-21 PDT5785 PHL → PWM Jul 21, 16:00 UTCJul 21, 17:00 UTC1h 0m
2026-07-21 PDT6050 - Jul 21, 13:25 UTCJul 21, 14:10 UTC45m
2026-07-21 PDT6050 - Jul 21, 11:55 UTCJul 21, 12:35 UTC40m
2026-07-21 PDT6100 YUL → PHL Jul 21, 09:45 UTCJul 21, 10:55 UTC1h 10m
2026-07-20 PDT5990 - Jul 20, 23:20 UTCJul 21, 00:25 UTC1h 4m
2026-07-20 PDT5839 - Jul 20, 20:50 UTCJul 20, 21:50 UTC1h 0m
2026-07-20 PDT5839 - Jul 20, 18:45 UTCJul 20, 19:35 UTC50m
2026-07-20 PDT6062 - Jul 20, 15:45 UTCJul 20, 16:55 UTC1h 10m
2026-07-20 PDT6062 - Jul 20, 11:50 UTCJul 20, 13:05 UTC1h 15m
2026-07-20 PDT5866 PHF → CLT Jul 20, 09:05 UTCJul 20, 09:50 UTC45m
2026-07-20 PDT6085 ART → PHL Jul 20, 03:45 UTCJul 20, 04:25 UTC40m
2026-07-20 PDT6085 ART → PHL Jul 20, 03:40 UTCJul 20, 04:24 UTC44m
2026-07-20 PDT6043 - Jul 20, 02:10 UTCJul 20, 02:30 UTC20m
2026-07-20 PDT6043 CAE → CLT Jul 20, 02:05 UTCJul 20, 02:31 UTC26m
2026-07-20 PDT6043 - Jul 20, 00:45 UTCJul 20, 01:10 UTC25m
2026-07-19 PDT5988 PHL → PVD Jul 19, 20:55 UTCJul 19, 21:55 UTC1h 0m
2026-07-19 PDT5988 PHL → PVD Jul 19, 18:55 UTCJul 19, 19:55 UTC1h 0m
2026-07-19 PDT5838 - Jul 19, 15:50 UTCJul 19, 17:15 UTC1h 25m
2026-07-19 PDT5838 - Jul 19, 13:40 UTCJul 19, 14:55 UTC1h 15m
2026-07-18 PDT5927 - Jul 18, 23:50 UTCJul 19, 00:45 UTC55m
2026-07-18 PDT5927 - Jul 18, 21:50 UTCJul 18, 22:50 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 N686AE page for operator, model, and routing details .

Mode-S A91986 frequently asked

What is Mode-S code A91986?
A91986 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N686AE.
Where is Mode-S A91986 registered?
Mode-S code A91986 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 A91986 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A91986, octal 52214606, decimal 11,082,118.
What flights does A91986 operate?
Mode-S A91986 has broadcast 20 distinct callsigns, including PDT5992, PDT5927, PDT6034, PDT5941, PDT5920.