Apparatus

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sensors Mode-S transponder

ACB9BF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N919SW · BOMBARDIER Regional Jet CRJ-200 · operated by CORPORATE FLIGHT MANAGEMENT INC DBA, CONTOUR AVIATION

Hex
ACB9BF
Octal
53134677
Decimal
11,319,743
Country
US
Tail
N919SW
Type
CRJ2
No current signal · last broadcast Jul 18, 02:50 UTC
Flights observed
350
Distinct callsigns
20
Country
US
Last broadcast
Jul 18, 02:50 UTC

Last known position

Most recent position reported by Mode-S ACB9BF.

Country allocation

The ICAO 24-bit address ACB9BF 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 20 distinct

Callsign Airline Flights Last seen
VTE3551 - 18 2026-07-01
VTE3552 - 16 2026-07-01
VTE8919 Corporate Flight Management 15 2026-07-18
VTE3691 - 13 2026-07-02
VTE3695 - 12 2026-07-02
VTE3041 - 12 2026-07-15
VTE3046 - 11 2026-07-08
VTE3694 - 10 2026-07-02
VTE3075 - 10 2026-07-08
VTE3068 - 10 2026-07-17
VTE3010 - 10 2026-07-16
VTE3053 - 9 2026-06-15
VTE3693 - 8 2026-07-02
VTE3071 - 8 2026-07-17
VTE3051 - 8 2026-07-17
VTE3011 - 8 2026-07-15
VTE3696 Corporate Flight Management 7 2026-05-10
VTE3692 - 7 2026-07-02
VTE3548 Corporate Flight Management 7 2026-05-31
VTE3083 - 7 2026-07-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-18 VTE8919 ORD → MQY Jul 18, 01:45 UTCJul 18, 02:50 UTC1h 6m
2026-07-18 VTE3070 - Jul 18, 00:15 UTCJul 18, 00:50 UTC35m
2026-07-17 VTE3071 - Jul 17, 19:55 UTCJul 17, 20:40 UTC45m
2026-07-17 VTE3068 - Jul 17, 18:19 UTCJul 17, 19:00 UTC40m
2026-07-17 VTE3051 - Jul 17, 13:50 UTCJul 17, 14:55 UTC1h 5m
2026-07-16 VTE3054 - Jul 16, 21:15 UTCJul 16, 22:00 UTC45m
2026-07-16 VTE3071 - Jul 16, 18:55 UTCJul 16, 19:35 UTC40m
2026-07-16 VTE3068 - Jul 16, 17:00 UTCJul 16, 17:40 UTC40m
2026-07-16 VTE3010 BRL → ORD Jul 16, 14:10 UTCJul 16, 14:45 UTC35m
2026-07-15 VTE3015 - Jul 15, 23:20 UTCJul 15, 23:50 UTC30m
2026-07-15 VTE3012 - Jul 15, 20:45 UTCJul 15, 21:25 UTC40m
2026-07-15 VTE3011 - Jul 15, 19:20 UTCJul 15, 19:50 UTC30m
2026-07-15 VTE3041 - Jul 15, 17:10 UTCJul 15, 17:50 UTC40m
2026-07-15 VTE3043 - Jul 15, 15:40 UTCJul 15, 16:25 UTC45m
2026-07-15 VTE9920 - Jul 15, 13:50 UTCJul 15, 14:05 UTC15m
2026-07-14 VTE8919 ORD → MQY Jul 14, 22:05 UTCJul 14, 23:15 UTC1h 9m
2026-07-13 VTE3093 - Jul 13, 16:15 UTCJul 13, 17:05 UTC50m
2026-07-13 VTE8919 - Jul 13, 02:15 UTCJul 13, 03:30 UTC1h 15m
2026-07-12 VTE3115 - Jul 12, 22:40 UTCJul 13, 01:20 UTC2h 40m
2026-07-12 VTE3091 - Jul 12, 19:20 UTCJul 12, 20:20 UTC1h 0m
2026-07-12 VTE3094 - Jul 12, 17:35 UTCJul 12, 18:10 UTC35m
2026-07-12 VTE3093 - Jul 12, 14:10 UTCJul 12, 15:15 UTC1h 5m
2026-07-11 VTE3094 - Jul 11, 20:15 UTCJul 11, 20:55 UTC40m
2026-07-11 VTE3010 - Jul 11, 18:05 UTCJul 11, 18:35 UTC30m
2026-07-11 VTE8919 - Jul 11, 16:45 UTCJul 11, 17:15 UTC30m
2026-07-11 VTE3093 - Jul 11, 14:10 UTCJul 11, 15:15 UTC1h 5m
2026-07-09 VTE3092 - Jul 9, 22:15 UTCJul 9, 23:05 UTC50m
2026-07-09 VTE3091 - Jul 9, 19:25 UTCJul 9, 20:15 UTC50m
2026-07-09 VTE3094 - Jul 9, 17:45 UTCJul 9, 18:20 UTC35m
2026-07-09 VTE3041 - Jul 9, 15:10 UTCJul 9, 15:50 UTC40m
2026-07-09 VTE3043 - Jul 9, 13:35 UTCJul 9, 14:25 UTC50m
2026-07-08 VTE3044 - Jul 8, 20:15 UTCJul 8, 21:10 UTC55m
2026-07-08 VTE3046 - Jul 8, 19:00 UTCJul 8, 19:30 UTC30m
2026-07-08 VTE3075 - Jul 8, 17:00 UTCJul 8, 17:45 UTC45m
2026-07-08 VTE6070 - Jul 8, 15:15 UTCJul 8, 15:50 UTC35m
2026-07-08 VTE3095 - Jul 8, 01:40 UTCJul 8, 02:35 UTC55m
2026-07-08 VTE8919 - Jul 8, 00:10 UTCJul 8, 00:40 UTC30m
2026-07-07 VTE9919 - Jul 7, 01:25 UTCJul 7, 01:50 UTC25m
2026-07-06 VTE3092 - Jul 6, 23:50 UTCJul 7, 00:45 UTC55m
2026-07-06 VTE3091 - Jul 6, 20:55 UTCJul 6, 21:50 UTC55m
2026-07-06 VTE3094 - Jul 6, 19:25 UTCJul 6, 20:00 UTC35m
2026-07-06 VTE3041 - Jul 6, 16:25 UTCJul 6, 17:10 UTC45m
2026-07-06 VTE3043 - Jul 6, 14:45 UTCJul 6, 15:35 UTC50m
2026-07-05 VTE3044 - Jul 5, 20:10 UTCJul 5, 21:05 UTC55m
2026-07-05 VTE3046 - Jul 5, 18:35 UTCJul 5, 19:15 UTC40m
2026-07-05 VTE3083 - Jul 5, 15:15 UTCJul 5, 16:25 UTC1h 10m
2026-07-04 VTE3083 - Jul 4, 19:00 UTCJul 4, 21:10 UTC2h 10m
2026-07-04 VTE3082 ORD → CGI Jul 4, 17:05 UTCJul 4, 18:20 UTC1h 15m
2026-07-04 VTE3081 CGI → PNS Jul 4, 14:35 UTCJul 4, 16:10 UTC1h 35m
2026-07-04 VTE3085 - Jul 4, 00:45 UTCJul 4, 02:00 UTC1h 15m

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 N919SW page for operator, model, and routing details .

Mode-S ACB9BF frequently asked

What is Mode-S code ACB9BF?
ACB9BF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N919SW.
Where is Mode-S ACB9BF registered?
Mode-S code ACB9BF 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 ACB9BF broadcasting right now?
No active broadcast right now. Last signal was Jul 18, 02:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACB9BF, octal 53134677, decimal 11,319,743.
What flights does ACB9BF operate?
Mode-S ACB9BF has broadcast 20 distinct callsigns, including VTE3551, VTE3552, VTE8919, VTE3691, VTE3695.