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sensors Mode-S transponder

AC730D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N901BS · DE HAVILLAND DHC-6 Twin Otter · operated by PARACLETE AVIATION LLC

Hex
AC730D
Octal
53071415
Decimal
11,301,645
Country
US
Tail
N901BS
Type
DHC6
No current signal · last broadcast Jul 23, 13:10 UTC
Flights observed
103
Distinct callsigns
1
Country
US
Last broadcast
Jul 23, 13:10 UTC

Last known position

Most recent position reported by Mode-S AC730D.

Country allocation

The ICAO 24-bit address AC730D 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
N901BS - 103 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-23 N901BS - Jul 23, 11:45 UTCJul 23, 13:10 UTC1h 25m
2026-07-22 N901BS - Jul 22, 14:05 UTCJul 22, 14:20 UTC15m
2026-07-22 N901BS - Jul 22, 12:55 UTCJul 22, 14:00 UTC1h 5m
2026-07-22 N901BS - Jul 22, 11:30 UTCJul 22, 12:45 UTC1h 15m
2026-07-21 N901BS - Jul 21, 11:30 UTCJul 21, 12:35 UTC1h 5m
2026-07-21 N901BS - Jul 21, 11:10 UTCJul 21, 11:25 UTC15m
2026-07-21 N901BS - Jul 21, 10:45 UTCJul 21, 11:05 UTC20m
2026-07-20 N901BS - Jul 20, 14:20 UTCJul 20, 15:50 UTC1h 30m
2026-07-20 N901BS - Jul 20, 11:25 UTCJul 20, 13:35 UTC2h 10m
2026-07-19 N901BS - Jul 19, 13:20 UTCJul 19, 17:10 UTC3h 50m
2026-07-19 N901BS - Jul 19, 12:55 UTCJul 19, 13:10 UTC15m
2026-07-19 N901BS - Jul 19, 12:10 UTCJul 19, 12:45 UTC35m
2026-07-18 N901BS - Jul 18, 23:05 UTCJul 18, 23:25 UTC20m
2026-07-18 N901BS - Jul 18, 19:15 UTCJul 18, 21:55 UTC2h 40m
2026-07-18 N901BS - Jul 18, 15:35 UTCJul 18, 18:40 UTC3h 5m
2026-07-18 N901BS - Jul 18, 13:55 UTCJul 18, 15:30 UTC1h 35m
2026-07-18 N901BS - Jul 18, 13:35 UTCJul 18, 13:50 UTC15m
2026-07-17 N901BS - Jul 17, 17:20 UTCJul 17, 17:40 UTC20m
2026-07-17 N901BS - Jul 17, 16:29 UTCJul 17, 16:49 UTC20m
2026-07-17 N901BS - Jul 17, 12:55 UTCJul 17, 15:49 UTC2h 55m
2026-07-17 N901BS - Jul 17, 12:15 UTCJul 17, 12:50 UTC35m
2026-07-16 N901BS - Jul 16, 17:10 UTCJul 16, 17:45 UTC35m
2026-07-16 N901BS - Jul 16, 16:25 UTCJul 16, 16:44 UTC20m
2026-07-16 N901BS - Jul 16, 14:45 UTCJul 16, 15:49 UTC1h 5m
2026-07-16 N901BS - Jul 16, 13:30 UTCJul 16, 14:05 UTC35m
2026-07-16 N901BS - Jul 16, 12:09 UTCJul 16, 12:44 UTC35m
2026-07-15 N901BS - Jul 15, 17:25 UTCJul 15, 19:05 UTC1h 40m
2026-07-12 N901BS - Jul 12, 15:25 UTCJul 12, 16:55 UTC1h 30m
2026-07-12 N901BS - Jul 12, 15:01 UTCJul 12, 15:20 UTC20m
2026-07-12 N901BS - Jul 12, 14:05 UTCJul 12, 14:25 UTC20m
2026-07-11 N901BS - Jul 11, 17:05 UTCJul 11, 17:30 UTC25m
2026-07-11 N901BS - Jul 11, 16:05 UTCJul 11, 17:00 UTC55m
2026-07-11 N901BS - Jul 11, 12:50 UTCJul 11, 16:00 UTC3h 10m
2026-07-11 N901BS - Jul 11, 12:05 UTCJul 11, 12:20 UTC15m
2026-07-10 N901BS - Jul 10, 16:20 UTCJul 10, 17:30 UTC1h 10m
2026-07-10 N901BS - Jul 10, 15:10 UTCJul 10, 16:15 UTC1h 5m
2026-07-10 N901BS - Jul 10, 14:20 UTCJul 10, 15:05 UTC45m
2026-07-10 N901BS - Jul 10, 13:10 UTCJul 10, 14:15 UTC1h 5m
2026-07-10 N901BS - Jul 10, 12:45 UTCJul 10, 13:05 UTC20m
2026-07-10 N901BS - Jul 10, 12:20 UTCJul 10, 12:40 UTC20m
2026-07-09 N901BS - Jul 9, 16:05 UTCJul 9, 16:40 UTC35m
2026-07-09 N901BS - Jul 9, 13:50 UTCJul 9, 16:00 UTC2h 10m
2026-07-09 N901BS - Jul 9, 12:20 UTCJul 9, 13:45 UTC1h 25m
2026-07-08 N901BS - Jul 8, 12:50 UTCJul 8, 16:05 UTC3h 15m
2026-07-08 N901BS - Jul 8, 12:30 UTCJul 8, 12:45 UTC15m
2026-07-04 N901BS - Jul 4, 18:50 UTCJul 4, 21:35 UTC2h 45m
2026-07-04 N901BS - Jul 4, 15:30 UTCJul 4, 18:20 UTC2h 50m
2026-06-30 N901BS - Jun 30, 18:25 UTCJun 30, 18:40 UTC15m
2026-06-30 N901BS - Jun 30, 15:35 UTCJun 30, 18:20 UTC2h 45m
2026-06-30 N901BS - Jun 30, 14:50 UTCJun 30, 15:30 UTC40m

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 N901BS page for operator, model, and routing details .

Mode-S AC730D frequently asked

What is Mode-S code AC730D?
AC730D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N901BS.
Where is Mode-S AC730D registered?
Mode-S code AC730D 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 AC730D broadcasting right now?
No active broadcast right now. Last signal was Jul 23, 13:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC730D, octal 53071415, decimal 11,301,645.
What flights does AC730D operate?
Mode-S AC730D has broadcast 1 distinct callsign, including N901BS.