Apparatus

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sensors Mode-S transponder

A33EA8

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N308SP · CESSNA 172 Skyhawk · operated by AMERIFLYERS OF TEXAS INC

Hex
A33EA8
Octal
50637250
Decimal
10,698,408
Country
US
Tail
N308SP
Type
C172
No current signal · last broadcast 18h ago
Flights observed
255
Distinct callsigns
1
Country
US
Last broadcast
18h ago

Last known position

Most recent position reported by Mode-S A33EA8.

Country allocation

The ICAO 24-bit address A33EA8 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
N308SP - 255 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 N308SP PPM → PPM Jul 13, 15:35 UTCJul 13, 16:25 UTC50m
2026-07-11 N308SP - Jul 11, 19:50 UTCJul 11, 21:50 UTC2h 0m
2026-07-11 N308SP - Jul 11, 14:50 UTCJul 11, 15:40 UTC50m
2026-07-11 N308SP PPM → PPM Jul 11, 11:40 UTCJul 11, 13:35 UTC1h 55m
2026-07-10 N308SP PPM → PPM Jul 10, 20:35 UTCJul 10, 22:45 UTC2h 10m
2026-07-08 N308SP - Jul 8, 17:15 UTCJul 8, 17:30 UTC15m
2026-07-08 N308SP - Jul 8, 15:45 UTCJul 8, 16:30 UTC45m
2026-07-08 N308SP - Jul 8, 00:25 UTCJul 8, 03:35 UTC3h 10m
2026-07-06 N308SP PPM → PPM Jul 6, 01:00 UTCJul 6, 01:15 UTC15m
2026-07-05 N308SP - Jul 5, 23:00 UTCJul 5, 23:50 UTC50m
2026-07-05 N308SP - Jul 5, 21:45 UTCJul 5, 22:20 UTC35m
2026-07-05 N308SP - Jul 5, 18:20 UTCJul 5, 18:45 UTC25m
2026-07-05 N308SP - Jul 5, 16:55 UTCJul 5, 17:40 UTC45m
2026-07-04 N308SP - Jul 4, 19:15 UTCJul 4, 20:50 UTC1h 35m
2026-07-04 N308SP - Jul 4, 13:00 UTCJul 4, 14:50 UTC1h 50m
2026-07-02 N308SP - Jul 2, 22:30 UTCJul 2, 22:50 UTC20m
2026-07-02 N308SP - Jul 2, 20:40 UTCJul 2, 21:00 UTC20m
2026-07-02 N308SP PPM → PPM Jul 2, 17:50 UTCJul 2, 19:25 UTC1h 35m
2026-07-02 N308SP - Jul 2, 12:50 UTCJul 2, 15:40 UTC2h 50m
2026-07-01 N308SP - Jul 1, 22:15 UTCJul 1, 22:50 UTC35m
2026-07-01 N308SP - Jul 1, 20:55 UTCJul 1, 21:15 UTC20m
2026-07-01 N308SP - Jul 1, 15:55 UTCJul 1, 16:05 UTC10m
2026-07-01 N308SP - Jul 1, 14:30 UTCJul 1, 14:50 UTC20m
2026-06-30 N308SP - Jun 30, 20:40 UTCJun 30, 22:50 UTC2h 10m
2026-06-30 N308SP - Jun 30, 16:55 UTCJun 30, 18:40 UTC1h 45m
2026-06-30 N308SP - Jun 30, 15:05 UTCJun 30, 15:15 UTC10m
2026-06-30 N308SP - Jun 30, 13:45 UTCJun 30, 14:20 UTC35m
2026-06-29 N308SP - Jun 29, 19:20 UTCJun 29, 19:35 UTC15m
2026-06-29 N308SP - Jun 29, 17:40 UTCJun 29, 18:44 UTC1h 5m
2026-06-29 N308SP - Jun 29, 16:10 UTCJun 29, 16:25 UTC15m
2026-06-29 N308SP - Jun 29, 14:44 UTCJun 29, 15:04 UTC20m
2026-06-29 N308SP - Jun 29, 12:39 UTCJun 29, 13:54 UTC1h 15m
2026-06-29 N308SP - Jun 29, 11:45 UTCJun 29, 12:09 UTC25m
2026-06-28 N308SP - Jun 28, 22:34 UTCJun 28, 23:34 UTC1h 0m
2026-06-28 N308SP - Jun 28, 21:40 UTCJun 28, 21:59 UTC20m
2026-06-28 N308SP - Jun 28, 15:24 UTCJun 28, 15:40 UTC15m
2026-06-28 N308SP - Jun 28, 13:59 UTCJun 28, 14:14 UTC15m
2026-06-27 N308SP - Jun 27, 16:39 UTCJun 27, 16:59 UTC20m
2026-06-27 N308SP - Jun 27, 15:10 UTCJun 27, 15:34 UTC25m
2026-06-26 N308SP - Jun 26, 19:00 UTCJun 26, 19:14 UTC15m
2026-06-26 N308SP - Jun 26, 17:40 UTCJun 26, 18:15 UTC35m
2026-06-25 N308SP - Jun 25, 21:25 UTCJun 25, 22:34 UTC1h 10m
2026-06-25 N308SP PPM → PPM Jun 25, 18:39 UTCJun 25, 19:39 UTC1h 0m
2026-06-25 N308SP - Jun 25, 16:05 UTCJun 25, 16:45 UTC40m
2026-06-25 N308SP - Jun 25, 13:50 UTCJun 25, 15:04 UTC1h 15m
2026-06-24 N308SP PPM → PPM Jun 24, 20:40 UTCJun 24, 22:14 UTC1h 35m
2026-06-24 N308SP - Jun 24, 18:34 UTCJun 24, 18:50 UTC15m
2026-06-24 N308SP - Jun 24, 17:25 UTCJun 24, 17:55 UTC30m
2026-06-23 N308SP PPM → PPM Jun 23, 18:34 UTCJun 23, 19:34 UTC1h 0m
2026-06-23 N308SP - Jun 23, 17:39 UTCJun 23, 17:59 UTC20m

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 N308SP page for operator, model, and routing details .

Mode-S A33EA8 frequently asked

What is Mode-S code A33EA8?
A33EA8 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N308SP.
Where is Mode-S A33EA8 registered?
Mode-S code A33EA8 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 A33EA8 broadcasting right now?
No active broadcast right now. Last signal was 18h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A33EA8, octal 50637250, decimal 10,698,408.
What flights does A33EA8 operate?
Mode-S A33EA8 has broadcast 1 distinct callsign, including N308SP.