Apparatus

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sensors Mode-S transponder

A90834

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N681PA · SAAB 2000 · operated by MEREGRASS INC

Hex
A90834
Octal
52204064
Decimal
11,077,684
Country
US
Tail
N681PA
Type
SB20
No current signal · last broadcast 1d ago
Flights observed
48
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A90834.

Country allocation

The ICAO 24-bit address A90834 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
QHD681 Meregrass 48 2026-06-01

Recent flights last 48

DateFlightRouteTakeoffLandingDuration
2026-06-01 QHD681 PNS → ATO Jun 1, 18:15 UTCJun 1, 19:50 UTC1h 35m
2026-06-01 QHD681 PNS → ATO Jun 1, 16:40 UTCJun 1, 17:45 UTC1h 5m
2026-06-01 QHD681 PNS → ATO Jun 1, 14:55 UTCJun 1, 15:45 UTC50m
2026-05-26 QHD681 PNS → ATO May 26, 19:20 UTCMay 26, 19:55 UTC35m
2026-05-26 QHD681 PNS → ATO May 26, 17:44 UTCMay 26, 18:55 UTC1h 10m
2026-05-26 QHD681 PNS → ATO May 26, 16:20 UTCMay 26, 16:55 UTC35m
2026-05-18 QHD681 PNS → ATO May 18, 17:55 UTCMay 18, 20:30 UTC2h 34m
2026-05-18 QHD681 PNS → ATO May 18, 14:40 UTCMay 18, 17:00 UTC2h 20m
2026-05-17 QHD681 PNS → ATO May 17, 19:35 UTCMay 17, 22:35 UTC3h 0m
2026-05-17 QHD681 PNS → ATO May 17, 15:40 UTCMay 17, 18:50 UTC3h 10m
2026-05-17 QHD681 PNS → ATO May 17, 14:05 UTCMay 17, 14:50 UTC45m
2026-05-15 QHD681 PNS → ATO May 15, 18:55 UTCMay 15, 19:25 UTC30m
2026-05-15 QHD681 PNS → ATO May 15, 16:45 UTCMay 15, 18:05 UTC1h 20m
2026-05-15 QHD681 PNS → ATO May 15, 13:55 UTCMay 15, 15:55 UTC1h 59m
2026-05-14 QHD681 PNS → ATO May 14, 00:30 UTCMay 14, 01:00 UTC30m
2026-05-13 QHD681 PNS → ATO May 13, 21:35 UTCMay 13, 23:55 UTC2h 20m
2026-05-12 QHD681 PNS → ATO May 12, 20:25 UTCMay 12, 21:45 UTC1h 20m
2026-05-12 QHD681 PNS → ATO May 12, 17:55 UTCMay 12, 19:30 UTC1h 35m
2026-05-12 QHD681 PNS → ATO May 12, 15:45 UTCMay 12, 16:20 UTC35m
2026-05-11 QHD681 PNS → ATO May 11, 02:20 UTCMay 11, 03:35 UTC1h 15m
2026-05-10 QHD681 PNS → ATO May 10, 18:55 UTCMay 10, 21:40 UTC2h 45m
2026-05-08 QHD681 PNS → ATO May 8, 21:20 UTCMay 8, 22:00 UTC40m
2026-05-08 QHD681 PNS → ATO May 8, 19:55 UTCMay 8, 21:15 UTC1h 20m
2026-05-08 QHD681 PNS → ATO May 8, 17:25 UTCMay 8, 18:50 UTC1h 25m
2026-05-08 QHD681 PNS → ATO May 8, 15:05 UTCMay 8, 16:50 UTC1h 45m
2026-05-05 QHD681 PNS → ATO May 5, 18:05 UTCMay 5, 19:25 UTC1h 20m
2026-05-05 QHD681 PNS → ATO May 5, 15:30 UTCMay 5, 16:30 UTC1h 0m
2026-05-04 QHD681 PNS → ATO May 4, 17:45 UTCMay 4, 20:10 UTC2h 26m
2026-05-03 QHD681 PNS → ATO May 3, 18:34 UTCMay 3, 20:55 UTC2h 20m
2026-05-03 QHD681 PNS → ATO May 3, 13:55 UTCMay 3, 17:40 UTC3h 45m
2026-05-03 QHD681 PNS → ATO May 3, 11:40 UTCMay 3, 13:10 UTC1h 30m
2026-05-03 QHD681 PNS → ATO May 3, 04:10 UTCMay 3, 04:35 UTC25m
2026-05-03 QHD681 PNS → ATO May 3, 01:30 UTCMay 3, 03:35 UTC2h 4m
2026-05-02 QHD681 PNS → ATO May 2, 15:25 UTCMay 2, 16:05 UTC40m
2026-05-01 QHD681 PNS → ATO May 1, 18:25 UTCMay 1, 19:50 UTC1h 25m
2026-05-01 QHD681 PNS → ATO May 1, 16:20 UTCMay 1, 16:50 UTC30m
2026-04-28 QHD681 PNS → ATO Apr 28, 17:40 UTCApr 28, 19:35 UTC1h 55m
2026-04-28 QHD681 PNS → ATO Apr 28, 15:05 UTCApr 28, 16:35 UTC1h 30m
2026-04-28 QHD681 PNS → ATO Apr 28, 13:10 UTCApr 28, 13:30 UTC20m
2026-04-23 QHD681 PNS → ATO Apr 23, 20:35 UTCApr 24, 01:30 UTC4h 55m
2026-04-21 QHD681 PNS → ATO Apr 21, 13:40 UTCApr 21, 15:45 UTC2h 5m
2026-04-20 QHD681 PNS → ATO Apr 20, 20:55 UTCApr 20, 22:45 UTC1h 50m
2026-04-14 QHD681 PNS → ATO Apr 14, 19:40 UTCApr 14, 19:55 UTC15m
2026-04-14 QHD681 PNS → ATO Apr 14, 17:55 UTCApr 14, 18:45 UTC50m
2026-04-14 QHD681 PNS → ATO Apr 14, 15:50 UTCApr 14, 16:45 UTC55m
2026-04-13 QHD681 - Apr 13, 00:20 UTCApr 13, 01:25 UTC1h 5m
2026-04-12 QHD681 - Apr 12, 23:55 UTCApr 13, 01:25 UTC1h 30m
2026-04-12 QHD681 - Apr 12, 20:05 UTCApr 12, 20:15 UTC10m

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 N681PA page for operator, model, and routing details .

Mode-S A90834 frequently asked

What is Mode-S code A90834?
A90834 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N681PA.
Where is Mode-S A90834 registered?
Mode-S code A90834 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 A90834 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A90834, octal 52204064, decimal 11,077,684.
What flights does A90834 operate?
Mode-S A90834 has broadcast 1 distinct callsign, including QHD681.