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sensors Mode-S transponder

A133D5

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N177GS · CESSNA 177 Cardinal · operated by HAWKEYE HELICOPTER LLC

Hex
A133D5
Octal
50231725
Decimal
10,564,565
Country
US
Tail
N177GS
Type
C177
No current signal · last broadcast 18d ago
Flights observed
133
Distinct callsigns
1
Country
US
Last broadcast
18d ago

Last known position

Most recent position reported by Mode-S A133D5.

Country allocation

The ICAO 24-bit address A133D5 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
N177GS - 133 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-23 N177GS - Jul 23, 13:30 UTCJul 23, 16:45 UTC3h 15m
2026-07-22 N177GS - Jul 22, 22:35 UTCJul 22, 23:35 UTC1h 0m
2026-07-22 N177GS - Jul 22, 19:25 UTCJul 22, 21:35 UTC2h 10m
2026-07-22 N177GS - Jul 22, 17:10 UTCJul 22, 19:00 UTC1h 50m
2026-07-22 N177GS - Jul 22, 14:35 UTCJul 22, 15:55 UTC1h 20m
2026-07-21 N177GS - Jul 21, 20:55 UTCJul 21, 22:40 UTC1h 45m
2026-07-21 N177GS - Jul 21, 18:20 UTCJul 21, 18:40 UTC20m
2026-07-21 N177GS - Jul 21, 14:35 UTCJul 21, 15:15 UTC40m
2026-07-18 N177GS - Jul 18, 21:40 UTCJul 18, 22:00 UTC20m
2026-07-18 N177GS - Jul 18, 17:05 UTCJul 18, 17:25 UTC20m
2026-07-18 N177GS - Jul 18, 15:00 UTCJul 18, 15:35 UTC35m
2026-07-17 N177GS - Jul 17, 18:15 UTCJul 17, 18:29 UTC15m
2026-07-17 N177GS - Jul 17, 14:30 UTCJul 17, 17:40 UTC3h 10m
2026-07-15 N177GS - Jul 15, 14:55 UTCJul 15, 16:10 UTC1h 15m
2026-07-15 N177GS - Jul 15, 13:40 UTCJul 15, 14:10 UTC30m
2026-07-15 N177GS - Jul 15, 12:10 UTCJul 15, 13:00 UTC50m
2026-07-14 N177GS - Jul 14, 21:45 UTCJul 14, 22:45 UTC59m
2026-07-14 N177GS - Jul 14, 20:10 UTCJul 14, 20:40 UTC30m
2026-07-14 N177GS - Jul 14, 16:55 UTCJul 14, 17:25 UTC30m
2026-07-14 N177GS - Jul 14, 15:00 UTCJul 14, 15:35 UTC35m
2026-07-09 N177GS - Jul 9, 18:20 UTCJul 9, 21:20 UTC3h 0m
2026-07-08 N177GS - Jul 8, 21:20 UTCJul 8, 21:55 UTC35m
2026-07-08 N177GS - Jul 8, 19:20 UTCJul 8, 20:45 UTC1h 25m
2026-07-08 N177GS - Jul 8, 16:45 UTCJul 8, 18:00 UTC1h 15m
2026-07-08 N177GS - Jul 8, 14:25 UTCJul 8, 15:35 UTC1h 10m
2026-07-07 N177GS - Jul 7, 21:00 UTCJul 7, 22:45 UTC1h 45m
2026-07-07 N177GS - Jul 7, 14:50 UTCJul 7, 15:25 UTC35m
2026-07-01 N177GS - Jul 1, 21:05 UTCJul 1, 21:50 UTC45m
2026-07-01 N177GS - Jul 1, 18:30 UTCJul 1, 19:20 UTC50m
2026-07-01 N177GS - Jul 1, 00:10 UTCJul 1, 00:30 UTC20m
2026-06-30 N177GS - Jun 30, 23:15 UTCJun 30, 23:35 UTC20m
2026-06-30 N177GS - Jun 30, 20:35 UTCJun 30, 22:40 UTC2h 5m
2026-06-30 N177GS - Jun 30, 16:25 UTCJun 30, 16:55 UTC30m
2026-06-30 N177GS - Jun 30, 14:15 UTCJun 30, 14:55 UTC40m
2026-06-24 N177GS - Jun 24, 15:35 UTCJun 24, 18:39 UTC3h 5m
2026-06-24 N177GS - Jun 24, 14:15 UTCJun 24, 14:34 UTC20m
2026-06-23 N177GS - Jun 23, 23:10 UTCJun 24, 00:05 UTC55m
2026-06-23 N177GS - Jun 23, 21:14 UTCJun 23, 22:29 UTC1h 15m
2026-06-23 N177GS - Jun 23, 19:44 UTCJun 23, 20:34 UTC50m
2026-06-23 N177GS - Jun 23, 16:05 UTCJun 23, 19:00 UTC2h 55m
2026-06-23 N177GS - Jun 23, 13:45 UTCJun 23, 14:55 UTC1h 10m
2026-06-22 N177GS - Jun 22, 20:55 UTCJun 22, 22:40 UTC1h 45m
2026-06-22 N177GS - Jun 22, 17:20 UTCJun 22, 17:34 UTC15m
2026-06-22 N177GS - Jun 22, 14:34 UTCJun 22, 15:05 UTC30m
2026-06-18 N177GS - Jun 18, 20:25 UTCJun 18, 20:50 UTC25m
2026-06-18 N177GS - Jun 18, 18:30 UTCJun 18, 19:10 UTC40m
2026-06-18 N177GS - Jun 18, 15:50 UTCJun 18, 17:40 UTC1h 50m
2026-06-16 N177GS - Jun 16, 21:50 UTCJun 16, 22:40 UTC50m
2026-06-16 N177GS - Jun 16, 20:15 UTCJun 16, 20:50 UTC35m
2026-06-16 N177GS - Jun 16, 17:05 UTCJun 16, 17:40 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 N177GS page for operator, model, and routing details .

Mode-S A133D5 frequently asked

What is Mode-S code A133D5?
A133D5 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N177GS.
Where is Mode-S A133D5 registered?
Mode-S code A133D5 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 A133D5 broadcasting right now?
No active broadcast right now. Last signal was 18d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A133D5, octal 50231725, decimal 10,564,565.
What flights does A133D5 operate?
Mode-S A133D5 has broadcast 1 distinct callsign, including N177GS.