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sensors Mode-S transponder

A673A9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N5147S · PIPER PA-28-140/150/160/180 · operated by BLUEGRASS AVIATION LLC

Hex
A673A9
Octal
51471651
Decimal
10,908,585
Country
US
Tail
N5147S
Type
P28A
No current signal · last broadcast 6d ago
Flights observed
135
Distinct callsigns
1
Country
US
Last broadcast
6d ago

Last known position

Most recent position reported by Mode-S A673A9.

Country allocation

The ICAO 24-bit address A673A9 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
N5147S - 135 2026-07-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-07 N5147S CKV → CKV Jul 7, 20:30 UTCJul 7, 21:05 UTC35m
2026-07-01 N5147S CKV → CKV Jul 1, 20:40 UTCJul 1, 21:50 UTC1h 10m
2026-07-01 N5147S - Jul 1, 17:30 UTCJul 1, 17:55 UTC25m
2026-07-01 N5147S - Jul 1, 14:45 UTCJul 1, 15:05 UTC20m
2026-07-01 N5147S - Jul 1, 12:05 UTCJul 1, 12:25 UTC20m
2026-06-30 N5147S - Jun 30, 21:50 UTCJun 30, 22:30 UTC40m
2026-06-30 N5147S - Jun 30, 18:35 UTCJun 30, 19:05 UTC30m
2026-06-30 N5147S - Jun 30, 16:40 UTCJun 30, 17:15 UTC35m
2026-06-30 N5147S - Jun 30, 15:55 UTCJun 30, 16:10 UTC15m
2026-06-30 N5147S - Jun 30, 12:25 UTCJun 30, 12:45 UTC20m
2026-06-29 N5147S - Jun 29, 22:49 UTCJun 29, 23:25 UTC35m
2026-06-29 N5147S - Jun 29, 20:30 UTCJun 29, 21:19 UTC50m
2026-06-29 N5147S CKV → CKV Jun 29, 16:35 UTCJun 29, 17:30 UTC55m
2026-06-29 N5147S CKV → CKV Jun 29, 14:25 UTCJun 29, 15:39 UTC1h 15m
2026-06-29 N5147S - Jun 29, 12:49 UTCJun 29, 13:44 UTC55m
2026-06-27 N5147S - Jun 27, 22:40 UTCJun 27, 23:50 UTC1h 10m
2026-06-27 N5147S - Jun 27, 20:44 UTCJun 27, 21:15 UTC30m
2026-06-25 N5147S - Jun 25, 20:49 UTCJun 25, 21:35 UTC45m
2026-06-25 N5147S CKV → CKV Jun 25, 18:34 UTCJun 25, 19:39 UTC1h 5m
2026-06-25 N5147S CKV → CKV Jun 25, 14:09 UTCJun 25, 15:15 UTC1h 5m
2026-06-25 N5147S - Jun 25, 00:29 UTCJun 25, 01:40 UTC1h 10m
2026-06-24 N5147S - Jun 24, 22:55 UTCJun 24, 23:40 UTC45m
2026-06-24 N5147S CKV → CKV Jun 24, 18:34 UTCJun 24, 20:44 UTC2h 10m
2026-06-24 N5147S CKV → CKV Jun 24, 14:24 UTCJun 24, 15:49 UTC1h 25m
2026-06-24 N5147S - Jun 24, 12:50 UTCJun 24, 13:44 UTC55m
2026-06-24 N5147S CKV → CKV Jun 24, 02:00 UTCJun 24, 03:50 UTC1h 50m
2026-06-23 N5147S CKV → CKV Jun 23, 22:34 UTCJun 23, 22:49 UTC15m
2026-06-23 N5147S - Jun 23, 20:34 UTCJun 23, 21:34 UTC1h 0m
2026-06-23 N5147S CKV → CKV Jun 23, 16:35 UTCJun 23, 18:25 UTC1h 50m
2026-06-23 N5147S CKV → CKV Jun 23, 14:49 UTCJun 23, 15:19 UTC30m
2026-06-22 N5147S - Jun 22, 14:34 UTCJun 22, 14:55 UTC20m
2026-06-21 N5147S - Jun 21, 21:14 UTCJun 21, 22:20 UTC1h 5m
2026-06-20 N5147S - Jun 20, 16:55 UTCJun 20, 17:44 UTC50m
2026-06-20 N5147S - Jun 20, 14:39 UTCJun 20, 15:54 UTC1h 15m
2026-06-20 N5147S - Jun 20, 12:54 UTCJun 20, 13:55 UTC1h 0m
2026-06-19 N5147S CKV → CKV Jun 19, 20:34 UTCJun 19, 21:49 UTC1h 15m
2026-06-19 N5147S - Jun 19, 16:55 UTCJun 19, 18:30 UTC1h 35m
2026-06-19 N5147S CKV → CKV Jun 19, 14:39 UTCJun 19, 15:59 UTC1h 20m
2026-06-19 N5147S CKV → CKV Jun 19, 12:59 UTCJun 19, 13:50 UTC50m
2026-06-17 N5147S CKV → CKV Jun 17, 14:35 UTCJun 17, 15:20 UTC45m
2026-06-17 N5147S - Jun 17, 12:55 UTCJun 17, 14:00 UTC1h 5m
2026-06-17 N5147S - Jun 17, 01:10 UTCJun 17, 01:50 UTC40m
2026-06-16 N5147S - Jun 16, 23:20 UTCJun 16, 23:45 UTC25m
2026-06-16 N5147S CKV → CKV Jun 16, 20:55 UTCJun 16, 21:40 UTC45m
2026-06-16 N5147S - Jun 16, 17:30 UTCJun 16, 18:45 UTC1h 15m
2026-06-16 N5147S CKV → CKV Jun 16, 15:50 UTCJun 16, 16:25 UTC35m
2026-06-16 N5147S - Jun 16, 12:35 UTCJun 16, 13:55 UTC1h 20m
2026-06-15 N5147S CKV → CKV Jun 15, 22:54 UTCJun 16, 00:20 UTC1h 25m
2026-06-15 N5147S - Jun 15, 13:05 UTCJun 15, 13:54 UTC50m
2026-06-13 N5147S - Jun 13, 18:55 UTCJun 13, 19:45 UTC50m

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 N5147S page for operator, model, and routing details .

Mode-S A673A9 frequently asked

What is Mode-S code A673A9?
A673A9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N5147S.
Where is Mode-S A673A9 registered?
Mode-S code A673A9 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 A673A9 broadcasting right now?
No active broadcast right now. Last signal was 6d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A673A9, octal 51471651, decimal 10,908,585.
What flights does A673A9 operate?
Mode-S A673A9 has broadcast 1 distinct callsign, including N5147S.