Apparatus

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sensors Mode-S transponder

A8990F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N653ND · CESSNA 172 Skyhawk · operated by PELICAN FLIGHT TRAINING LLC

Hex
A8990F
Octal
52114417
Decimal
11,049,231
Country
US
Tail
N653ND
Type
C172
No current signal · last broadcast 1h ago
Flights observed
96
Distinct callsigns
1
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A8990F.

Country allocation

The ICAO 24-bit address A8990F 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
N653ND - 96 2026-06-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 N653ND SQL → SQL Jun 2, 18:55 UTCJun 2, 19:05 UTC10m
2026-06-02 N653ND SQL → SQL Jun 2, 18:35 UTCJun 2, 18:40 UTC5m
2026-06-01 N653ND SQL → SQL Jun 1, 16:45 UTCJun 1, 19:35 UTC2h 50m
2026-05-31 N653ND - May 31, 22:40 UTCMay 31, 23:30 UTC50m
2026-05-31 N653ND SQL → SQL May 31, 21:20 UTCMay 31, 22:10 UTC50m
2026-05-31 N653ND SQL → SQL May 31, 18:05 UTCMay 31, 18:10 UTC5m
2026-05-31 N653ND SQL → SQL May 31, 17:50 UTCMay 31, 18:00 UTC10m
2026-05-31 N653ND - May 31, 17:35 UTCMay 31, 17:40 UTC5m
2026-05-31 N653ND SQL → SQL May 31, 17:10 UTCMay 31, 17:15 UTC5m
2026-05-31 N653ND - May 31, 00:45 UTCMay 31, 00:55 UTC10m
2026-05-30 N653ND SQL → SQL May 30, 23:00 UTCMay 30, 23:55 UTC55m
2026-05-30 N653ND SQL → SQL May 30, 20:50 UTCMay 30, 21:20 UTC30m
2026-05-30 N653ND SQL → SQL May 30, 19:15 UTCMay 30, 19:55 UTC40m
2026-05-30 N653ND - May 30, 18:10 UTCMay 30, 18:20 UTC10m
2026-05-30 N653ND SQL → SQL May 30, 17:30 UTCMay 30, 18:05 UTC35m
2026-05-29 N653ND - May 29, 20:10 UTCMay 29, 20:40 UTC30m
2026-05-29 N653ND - May 29, 18:40 UTCMay 29, 19:25 UTC45m
2026-05-28 N653ND SQL → SQL May 28, 01:45 UTCMay 28, 02:50 UTC1h 5m
2026-05-27 N653ND SQL → SQL May 27, 22:45 UTCMay 28, 00:10 UTC1h 25m
2026-05-27 N653ND SQL → SQL May 27, 19:50 UTCMay 27, 20:20 UTC30m
2026-05-27 N653ND SQL → SQL May 27, 15:20 UTCMay 27, 15:50 UTC30m
2026-05-27 N653ND SQL → SQL May 27, 15:00 UTCMay 27, 15:05 UTC5m
2026-05-23 N653ND SQL → SQL May 23, 21:25 UTCMay 23, 22:00 UTC35m
2026-05-23 N653ND HWD → SQL May 23, 19:40 UTCMay 23, 20:15 UTC35m
2026-05-23 N653ND SQL → HWD May 23, 19:10 UTCMay 23, 19:30 UTC20m
2026-05-23 N653ND SQL → SQL May 23, 00:00 UTCMay 23, 00:10 UTC10m
2026-05-22 N653ND SQL → SQL May 22, 23:50 UTCMay 22, 23:55 UTC5m
2026-05-21 N653ND - May 21, 02:00 UTCMay 21, 02:30 UTC30m
2026-05-21 N653ND - May 21, 01:15 UTCMay 21, 01:55 UTC40m
2026-05-20 N653ND SQL → SQL May 20, 23:15 UTCMay 20, 23:30 UTC15m
2026-05-20 N653ND SQL → SQL May 20, 22:20 UTCMay 20, 23:10 UTC50m
2026-05-20 N653ND - May 20, 19:00 UTCMay 20, 19:40 UTC40m
2026-05-20 N653ND - May 20, 17:30 UTCMay 20, 18:10 UTC40m
2026-05-20 N653ND SQL → SQL May 20, 00:10 UTCMay 20, 01:20 UTC1h 10m
2026-05-19 N653ND SQL → SQL May 19, 01:30 UTCMay 19, 02:25 UTC55m
2026-05-18 N653ND SQL → SQL May 18, 00:00 UTCMay 18, 01:00 UTC1h 0m
2026-05-17 N653ND - May 17, 22:55 UTCMay 17, 23:00 UTC5m
2026-05-17 N653ND SQL → SQL May 17, 21:40 UTCMay 17, 22:45 UTC1h 5m
2026-05-17 N653ND SQL → SQL May 17, 16:30 UTCMay 17, 17:15 UTC45m
2026-05-16 N653ND SQL → SQL May 16, 22:35 UTCMay 17, 00:10 UTC1h 35m
2026-05-16 N653ND SQL → SQL May 16, 19:15 UTCMay 16, 20:30 UTC1h 15m
2026-05-16 N653ND - May 16, 18:00 UTCMay 16, 18:15 UTC15m
2026-05-16 N653ND SQL → SQL May 16, 17:35 UTCMay 16, 17:55 UTC20m
2026-05-16 N653ND SQL → SQL May 16, 16:45 UTCMay 16, 17:10 UTC25m
2026-05-16 N653ND SQL → SQL May 16, 01:00 UTCMay 16, 02:00 UTC1h 0m
2026-05-14 N653ND - May 14, 23:30 UTCMay 14, 23:45 UTC15m
2026-05-14 N653ND HWD → HWD May 14, 23:15 UTCMay 14, 23:20 UTC5m
2026-05-14 N653ND SQL → HWD May 14, 22:50 UTCMay 14, 23:00 UTC10m
2026-05-14 N653ND SQL → SQL May 14, 01:25 UTCMay 14, 02:35 UTC1h 10m
2026-05-13 N653ND SQL → SQL May 13, 19:45 UTCMay 13, 21:55 UTC2h 10m

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 N653ND page for operator, model, and routing details .

Mode-S A8990F frequently asked

What is Mode-S code A8990F?
A8990F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N653ND.
Where is Mode-S A8990F registered?
Mode-S code A8990F 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 A8990F 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 A8990F, octal 52114417, decimal 11,049,231.
What flights does A8990F operate?
Mode-S A8990F has broadcast 1 distinct callsign, including N653ND.