Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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 7h ago
Flights observed
834
Distinct callsigns
20
Country
US
Last broadcast
7h ago

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
PDT5941 Piedmont Airlines 11 2026-06-03
PDT6032 - 10 2026-06-25
PDT5878 Piedmont Airlines 10 2026-06-13
PDT5846 - 10 2026-07-11
PDT5807 Piedmont Airlines 10 2026-06-10
PDT5927 Piedmont Airlines 9 2026-06-03
PDT5796 Piedmont Airlines 9 2026-06-30
PDT6126 - 8 2026-07-09
PDT6116 - 8 2026-06-27
PDT6051 - 8 2026-06-30
PDT6038 - 8 2026-07-13
PDT5972 - 8 2026-07-01
PDT5970 - 8 2026-07-01
PDT5942 - 8 2026-07-10
PDT5920 - 8 2026-07-13
PDT5845 Piedmont Airlines 8 2026-06-13
PDT6123 Piedmont Airlines 7 2026-07-08
PDT6118 Piedmont Airlines 7 2026-06-09
PDT6062 - 7 2026-07-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 PDT6038 - Jul 13, 22:10 UTCJul 13, 23:25 UTC1h 15m
2026-07-13 PDT6038 BGR → PHL Jul 13, 22:08 UTCJul 13, 23:28 UTC1h 20m
2026-07-13 PDT6038 - Jul 13, 19:05 UTCJul 13, 20:20 UTC1h 15m
2026-07-13 PDT5920 - Jul 13, 17:05 UTCJul 13, 17:30 UTC25m
2026-07-13 PDT5920 SCE → PHL Jul 13, 16:57 UTCJul 13, 17:32 UTC35m
2026-07-13 PDT5920 - Jul 13, 15:10 UTCJul 13, 15:45 UTC35m
2026-07-13 PDT6029 - Jul 13, 12:05 UTCJul 13, 13:20 UTC1h 15m
2026-07-13 PDT6027 - Jul 13, 00:01 UTCJul 13, 01:05 UTC1h 5m
2026-07-12 PDT6027 - Jul 12, 23:50 UTCJul 12, 23:55 UTC5m
2026-07-12 PDT6038 - Jul 12, 21:05 UTCJul 12, 22:30 UTC1h 25m
2026-07-12 PDT6038 PHL → BGR Jul 12, 18:50 UTCJul 12, 20:01 UTC1h 10m
2026-07-12 PDT5920 - Jul 12, 17:05 UTCJul 12, 17:35 UTC30m
2026-07-12 PDT5920 - Jul 12, 15:40 UTCJul 12, 16:05 UTC25m
2026-07-11 PDT6034 - Jul 11, 15:15 UTCJul 11, 16:25 UTC1h 10m
2026-07-11 PDT6034 AVL → PHL Jul 11, 15:11 UTCJul 11, 16:24 UTC1h 13m
2026-07-11 PDT6093 - Jul 11, 12:40 UTCJul 11, 14:00 UTC1h 20m
2026-07-11 PDT5846 - Jul 11, 10:25 UTCJul 11, 11:40 UTC1h 15m
2026-07-11 PDT5846 AVL → PHL Jul 11, 10:21 UTCJul 11, 11:40 UTC1h 19m
2026-07-10 PDT6034 - Jul 10, 21:15 UTCJul 10, 22:30 UTC1h 15m
2026-07-10 PDT5951 - Jul 10, 18:50 UTCJul 10, 20:05 UTC1h 15m
2026-07-10 PDT5951 - Jul 10, 16:20 UTCJul 10, 17:50 UTC1h 30m
2026-07-10 PDT6001 - Jul 10, 14:15 UTCJul 10, 15:15 UTC1h 0m
2026-07-10 PDT5966 - Jul 10, 12:35 UTCJul 10, 13:35 UTC1h 0m
2026-07-10 PDT5846 - Jul 10, 09:45 UTCJul 10, 11:05 UTC1h 20m
2026-07-10 PDT5846 AVL → PHL Jul 10, 09:42 UTCJul 10, 11:04 UTC1h 22m
2026-07-10 PDT9988 - Jul 10, 05:15 UTCJul 10, 07:10 UTC1h 55m
2026-07-10 PDT5942 PHL → MHT Jul 10, 03:19 UTCJul 10, 04:22 UTC1h 3m
2026-07-10 PDT5942 - Jul 10, 03:20 UTCJul 10, 04:15 UTC55m
2026-07-10 PDT6005 ROA → PHL Jul 10, 01:10 UTCJul 10, 02:09 UTC59m
2026-07-10 PDT6005 ROA → PHL Jul 10, 01:15 UTCJul 10, 02:10 UTC55m
2026-07-09 PDT5983 - Jul 9, 20:40 UTCJul 9, 21:10 UTC30m
2026-07-09 PDT5983 PSQ → ROA Jul 9, 19:40 UTCJul 9, 21:10 UTC1h 30m
2026-07-09 PDT5983 PHL → ROA Jul 9, 19:39 UTCJul 9, 20:24 UTC45m
2026-07-09 PDT6126 - Jul 9, 15:35 UTCJul 9, 16:30 UTC55m
2026-07-09 PDT6126 ROC → PHL Jul 9, 15:33 UTCJul 9, 16:33 UTC1h 0m
2026-07-09 PDT6126 - Jul 9, 13:45 UTCJul 9, 14:45 UTC1h 0m
2026-07-09 PDT5846 - Jul 9, 09:35 UTCJul 9, 10:50 UTC1h 15m
2026-07-09 PDT6093 - Jul 9, 01:55 UTCJul 9, 03:15 UTC1h 20m
2026-07-08 PDT6108 - Jul 8, 23:40 UTCJul 9, 00:20 UTC40m
2026-07-08 PDT6108 - Jul 8, 22:00 UTCJul 8, 22:45 UTC45m
2026-07-08 PDT5859 PHL → BGR Jul 8, 19:35 UTCJul 8, 20:20 UTC45m
2026-07-08 PDT5859 PHL → BGR Jul 8, 19:35 UTCJul 8, 20:28 UTC53m
2026-07-08 PDT5859 PHL → BGR Jul 8, 18:00 UTCJul 8, 18:45 UTC45m
2026-07-08 PDT6123 BUF → PHL Jul 8, 15:30 UTCJul 8, 16:50 UTC1h 20m
2026-07-08 PDT6123 BUF → PHL Jul 8, 15:27 UTCJul 8, 16:47 UTC1h 20m
2026-07-08 PDT6123 BUF → PHL Jul 8, 13:25 UTCJul 8, 14:40 UTC1h 15m
2026-07-08 PDT5846 - Jul 8, 09:50 UTCJul 8, 11:15 UTC1h 25m
2026-07-08 PDT5846 AVL → PHL Jul 8, 09:49 UTCJul 8, 11:12 UTC1h 23m
2026-07-08 PDT6093 - Jul 8, 01:55 UTCJul 8, 03:20 UTC1h 25m
2026-07-07 PDT5942 - Jul 7, 23:35 UTCJul 8, 00:35 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 7h ago.
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, PDT5941, PDT6032, PDT5878, PDT5846.