Apparatus

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sensors Mode-S transponder

A6777B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N5158J · CESSNA 172 Skyhawk · operated by CZJ FLYING INC

Hex
A6777B
Octal
51473573
Decimal
10,909,563
Country
US
Tail
N5158J
Type
C172
No current signal · last broadcast 3h ago
Flights observed
224
Distinct callsigns
1
Country
US
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S A6777B.

Country allocation

The ICAO 24-bit address A6777B 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
N5158J - 224 2026-07-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-21 N5158J - Jul 21, 17:20 UTCJul 21, 17:50 UTC30m
2026-07-21 N5158J - Jul 21, 16:05 UTCJul 21, 16:50 UTC45m
2026-07-21 N5158J - Jul 21, 14:00 UTCJul 21, 14:45 UTC45m
2026-07-20 N5158J - Jul 20, 23:40 UTCJul 21, 00:40 UTC1h 0m
2026-07-20 N5158J - Jul 20, 21:10 UTCJul 20, 22:00 UTC50m
2026-07-20 N5158J - Jul 20, 19:05 UTCJul 20, 20:00 UTC55m
2026-07-20 N5158J - Jul 20, 15:55 UTCJul 20, 17:00 UTC1h 5m
2026-07-20 N5158J CYS → CYS Jul 20, 13:50 UTCJul 20, 14:50 UTC1h 0m
2026-07-19 N5158J - Jul 19, 21:55 UTCJul 19, 22:35 UTC40m
2026-07-19 N5158J - Jul 19, 17:50 UTCJul 19, 19:25 UTC1h 35m
2026-07-19 N5158J - Jul 19, 16:15 UTCJul 19, 16:50 UTC35m
2026-07-19 N5158J - Jul 19, 15:00 UTCJul 19, 15:30 UTC30m
2026-07-18 N5158J - Jul 18, 23:10 UTCJul 18, 23:30 UTC20m
2026-07-18 N5158J - Jul 18, 22:00 UTCJul 18, 22:20 UTC20m
2026-07-18 N5158J - Jul 18, 17:05 UTCJul 18, 17:20 UTC15m
2026-07-18 N5158J - Jul 18, 16:15 UTCJul 18, 16:25 UTC10m
2026-07-17 N5158J - Jul 17, 20:55 UTCJul 17, 21:05 UTC10m
2026-07-17 N5158J - Jul 17, 20:00 UTCJul 17, 20:10 UTC10m
2026-07-17 N5158J - Jul 17, 16:34 UTCJul 17, 17:20 UTC45m
2026-07-17 N5158J - Jul 17, 14:55 UTCJul 17, 15:15 UTC20m
2026-07-17 N5158J - Jul 17, 13:29 UTCJul 17, 13:55 UTC25m
2026-07-16 N5158J - Jul 16, 23:35 UTCJul 17, 00:50 UTC1h 15m
2026-07-16 N5158J - Jul 16, 21:25 UTCJul 16, 22:19 UTC55m
2026-07-16 N5158J - Jul 16, 18:40 UTCJul 16, 19:35 UTC55m
2026-07-16 N5158J - Jul 16, 16:15 UTCJul 16, 17:30 UTC1h 15m
2026-07-15 N5158J - Jul 15, 23:30 UTCJul 16, 00:40 UTC1h 10m
2026-07-15 N5158J - Jul 15, 21:00 UTCJul 15, 22:00 UTC1h 0m
2026-07-15 N5158J - Jul 15, 18:35 UTCJul 15, 18:50 UTC15m
2026-07-15 N5158J - Jul 15, 16:35 UTCJul 15, 16:45 UTC10m
2026-07-15 N5158J - Jul 15, 14:55 UTCJul 15, 15:10 UTC15m
2026-07-15 N5158J - Jul 15, 13:40 UTCJul 15, 13:50 UTC10m
2026-07-15 N5158J - Jul 15, 03:15 UTCJul 15, 04:45 UTC1h 30m
2026-07-14 N5158J - Jul 14, 23:40 UTCJul 15, 01:20 UTC1h 40m
2026-07-14 N5158J - Jul 14, 18:40 UTCJul 14, 19:20 UTC40m
2026-07-14 N5158J - Jul 14, 16:05 UTCJul 14, 16:20 UTC15m
2026-07-14 N5158J - Jul 14, 14:10 UTCJul 14, 15:10 UTC1h 0m
2026-07-13 N5158J - Jul 13, 17:55 UTCJul 13, 18:50 UTC55m
2026-07-13 N5158J - Jul 13, 14:45 UTCJul 13, 16:30 UTC1h 45m
2026-07-13 N5158J - Jul 13, 12:50 UTCJul 13, 13:45 UTC55m
2026-07-13 N5158J - Jul 13, 03:40 UTCJul 13, 04:30 UTC50m
2026-07-12 N5158J - Jul 12, 22:10 UTCJul 12, 22:45 UTC35m
2026-07-12 N5158J - Jul 12, 19:10 UTCJul 12, 19:30 UTC20m
2026-07-12 N5158J - Jul 12, 18:20 UTCJul 12, 18:35 UTC15m
2026-07-12 N5158J - Jul 12, 15:40 UTCJul 12, 17:20 UTC1h 40m
2026-07-11 N5158J - Jul 11, 16:20 UTCJul 11, 16:40 UTC20m
2026-07-11 N5158J - Jul 11, 14:40 UTCJul 11, 15:10 UTC30m
2026-07-10 N5158J - Jul 10, 19:05 UTCJul 10, 19:25 UTC20m
2026-07-10 N5158J - Jul 10, 16:00 UTCJul 10, 17:25 UTC1h 25m
2026-07-10 N5158J - Jul 10, 12:55 UTCJul 10, 13:55 UTC1h 0m
2026-07-09 N5158J - Jul 9, 16:40 UTCJul 9, 17:40 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 N5158J page for operator, model, and routing details .

Mode-S A6777B frequently asked

What is Mode-S code A6777B?
A6777B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N5158J.
Where is Mode-S A6777B registered?
Mode-S code A6777B 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 A6777B broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6777B, octal 51473573, decimal 10,909,563.
What flights does A6777B operate?
Mode-S A6777B has broadcast 1 distinct callsign, including N5158J.