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sensors Mode-S transponder

A91ED6

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N687SP · CESSNA 172 Skyhawk · operated by BMG AVIATION INC

Hex
A91ED6
Octal
52217326
Decimal
11,083,478
Country
US
Tail
N687SP
Type
C172
No current signal · last broadcast 9h ago
Flights observed
109
Distinct callsigns
1
Country
US
Last broadcast
9h ago

Last known position

Most recent position reported by Mode-S A91ED6.

Country allocation

The ICAO 24-bit address A91ED6 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 1 distinct

Callsign Airline Flights Last seen
N687SP - 107 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-20 N687SP - Jul 20, 13:55 UTCJul 20, 14:45 UTC50m
2026-07-19 N687SP BMG → BMG Jul 19, 19:50 UTCJul 19, 21:15 UTC1h 25m
2026-07-19 N687SP - Jul 19, 13:20 UTCJul 19, 14:05 UTC45m
2026-07-18 - - Jul 18, 22:40 UTCJul 18, 22:55 UTC15m
2026-07-18 N687SP - Jul 18, 14:10 UTCJul 18, 14:35 UTC25m
2026-07-16 N687SP - Jul 16, 13:40 UTCJul 16, 15:40 UTC2h 0m
2026-07-15 N687SP - Jul 15, 20:05 UTCJul 15, 20:15 UTC10m
2026-07-15 N687SP - Jul 15, 18:50 UTCJul 15, 19:10 UTC20m
2026-07-15 N687SP - Jul 15, 17:15 UTCJul 15, 17:40 UTC25m
2026-07-15 N687SP - Jul 15, 14:15 UTCJul 15, 14:55 UTC40m
2026-07-14 N687SP - Jul 14, 23:20 UTCJul 15, 00:10 UTC50m
2026-07-14 N687SP LUK → LUK Jul 14, 22:15 UTCJul 14, 22:40 UTC25m
2026-07-14 N687SP - Jul 14, 20:35 UTCJul 14, 21:40 UTC1h 5m
2026-07-14 N687SP BMG → BMG Jul 14, 13:35 UTCJul 14, 14:20 UTC45m
2026-07-13 N687SP - Jul 13, 19:15 UTCJul 13, 19:30 UTC15m
2026-07-13 N687SP - Jul 13, 17:55 UTCJul 13, 18:20 UTC25m
2026-07-10 N687SP - Jul 10, 18:40 UTCJul 10, 19:15 UTC35m
2026-07-09 N687SP - Jul 9, 14:20 UTCJul 9, 15:30 UTC1h 10m
2026-07-09 N687SP - Jul 9, 01:10 UTCJul 9, 02:30 UTC1h 20m
2026-07-08 N687SP - Jul 8, 23:15 UTCJul 9, 00:30 UTC1h 15m
2026-07-08 N687SP - Jul 8, 21:05 UTCJul 8, 22:20 UTC1h 15m
2026-07-08 N687SP - Jul 8, 16:00 UTCJul 8, 17:20 UTC1h 20m
2026-07-07 N687SP - Jul 7, 19:30 UTCJul 7, 19:45 UTC15m
2026-06-23 N687SP - Jun 23, 18:45 UTCJun 23, 19:24 UTC40m
2026-06-23 N687SP - Jun 23, 17:34 UTCJun 23, 18:14 UTC40m
2026-06-23 N687SP - Jun 23, 13:45 UTCJun 23, 16:44 UTC3h 0m
2026-06-22 N687SP - Jun 22, 21:35 UTCJun 22, 23:10 UTC1h 35m
2026-06-22 N687SP - Jun 22, 20:10 UTCJun 22, 20:24 UTC15m
2026-06-22 N687SP - Jun 22, 18:54 UTCJun 22, 19:05 UTC10m
2026-06-22 N687SP - Jun 22, 16:29 UTCJun 22, 18:04 UTC1h 35m
2026-06-21 N687SP - Jun 21, 19:05 UTCJun 21, 19:34 UTC30m
2026-06-21 N687SP - Jun 21, 17:10 UTCJun 21, 17:24 UTC15m
2026-06-21 N687SP - Jun 21, 15:54 UTCJun 21, 16:30 UTC35m
2026-06-21 - BMG → BMG Jun 21, 02:55 UTCJun 21, 03:05 UTC10m
2026-06-20 N687SP - Jun 20, 13:29 UTCJun 20, 13:59 UTC30m
2026-06-19 N687SP - Jun 19, 17:14 UTCJun 19, 17:24 UTC10m
2026-06-19 N687SP - Jun 19, 13:44 UTCJun 19, 14:24 UTC40m
2026-06-16 N687SP - Jun 16, 17:35 UTCJun 16, 18:09 UTC35m
2026-06-15 N687SP - Jun 15, 18:45 UTCJun 15, 19:35 UTC50m
2026-06-13 N687SP - Jun 13, 16:45 UTCJun 13, 16:55 UTC10m
2026-06-13 N687SP - Jun 13, 14:40 UTCJun 13, 15:45 UTC1h 5m
2026-06-12 N687SP - Jun 12, 23:30 UTCJun 12, 23:40 UTC10m
2026-06-12 N687SP - Jun 12, 22:15 UTCJun 12, 22:40 UTC25m
2026-06-12 N687SP BMG → BMG Jun 12, 15:55 UTCJun 12, 17:00 UTC1h 5m
2026-06-12 N687SP - Jun 12, 14:20 UTCJun 12, 14:45 UTC25m
2026-06-06 N687SP - Jun 6, 14:00 UTCJun 6, 14:59 UTC1h 0m
2026-06-04 N687SP - Jun 4, 18:10 UTCJun 4, 18:50 UTC40m
2026-06-04 N687SP - Jun 4, 14:15 UTCJun 4, 14:55 UTC40m
2026-06-03 N687SP - Jun 3, 20:10 UTCJun 3, 20:45 UTC35m
2026-05-30 N687SP - May 30, 17:55 UTCMay 30, 18:30 UTC35m

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 N687SP page for operator, model, and routing details .

Mode-S A91ED6 frequently asked

What is Mode-S code A91ED6?
A91ED6 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N687SP.
Where is Mode-S A91ED6 registered?
Mode-S code A91ED6 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 A91ED6 broadcasting right now?
No active broadcast right now. Last signal was 9h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A91ED6, octal 52217326, decimal 11,083,478.
What flights does A91ED6 operate?
Mode-S A91ED6 has broadcast 1 distinct callsign, including N687SP.