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 5h ago
Flights observed
161
Distinct callsigns
20
Country
US
Last broadcast
5h ago

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 Corporate Flight Management 10 2026-05-21
VTE3695 Corporate Flight Management 8 2026-05-08
VTE3696 Corporate Flight Management 7 2026-05-10
VTE3552 Corporate Flight Management 7 2026-05-10
VTE3075 Corporate Flight Management 7 2026-05-26
VTE3041 Corporate Flight Management 7 2026-05-21
VTE3548 Corporate Flight Management 6 2026-05-10
VTE3539 Corporate Flight Management 6 2026-05-21
VTE3053 Corporate Flight Management 6 2026-05-25
VTE3048 Corporate Flight Management 6 2026-05-21
VTE3047 Corporate Flight Management 6 2026-05-20
VTE3046 Corporate Flight Management 6 2026-05-20
VTE8919 Corporate Flight Management 5 2026-05-29
VTE3694 Corporate Flight Management 5 2026-05-08
VTE3070 Corporate Flight Management 5 2026-05-25
VTE3068 Corporate Flight Management 5 2026-05-19
VTE3051 Corporate Flight Management 5 2026-05-19
VTE3010 Corporate Flight Management 5 2026-05-17
VTE3691 Corporate Flight Management 4 2026-05-09
VTE3071 Corporate Flight Management 4 2026-05-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 VTE8919 ORD → MQY May 29, 19:45 UTCMay 29, 20:55 UTC1h 10m
2026-05-28 VTE9919 DFW → MQY May 28, 02:25 UTCMay 28, 03:30 UTC1h 5m
2026-05-26 VTE3075 IRK → ORD May 26, 14:50 UTCMay 26, 15:39 UTC50m
2026-05-25 VTE3070 ORD → IRK May 25, 23:35 UTCMay 26, 00:14 UTC40m
2026-05-25 VTE3053 MWA → ORD May 25, 21:30 UTCMay 25, 22:19 UTC50m
2026-05-25 VTE918 PBI → MWA May 25, 18:45 UTCMay 25, 20:45 UTC1h 59m
2026-05-25 VTE919 YWG → YYC May 25, 16:30 UTCMay 25, 17:00 UTC30m
2026-05-22 VTE0919 YWG → YYC May 22, 14:35 UTCMay 22, 15:05 UTC30m
2026-05-22 VTE7919 MQY → PBI May 22, 11:25 UTCMay 22, 13:20 UTC1h 55m
2026-05-21 VTE8919 ORD → MQY May 21, 22:25 UTCMay 21, 23:55 UTC1h 30m
2026-05-21 VTE3551 TBN → DFW May 21, 20:10 UTCMay 21, 21:15 UTC1h 5m
2026-05-21 VTE3539 ORD → TBN May 21, 17:45 UTCMay 21, 18:40 UTC55m
2026-05-21 VTE3041 UIN → ORD May 21, 15:00 UTCMay 21, 15:50 UTC50m
2026-05-21 VTE3048 ORD → UIN May 21, 01:50 UTCMay 21, 02:20 UTC30m
2026-05-20 VTE3047 UIN → ORD May 20, 22:50 UTCMay 20, 23:30 UTC40m
2026-05-20 VTE3046 ORD → UIN May 20, 20:45 UTCMay 20, 21:20 UTC35m
2026-05-20 VTE3075 IRK → ORD May 20, 15:00 UTCMay 20, 15:35 UTC35m
2026-05-19 VTE3070 ORD → IRK May 19, 23:00 UTCMay 19, 23:40 UTC40m
2026-05-19 VTE3071 IRK → ORD May 19, 19:10 UTCMay 19, 19:55 UTC45m
2026-05-19 VTE3068 ORD → IRK May 19, 16:50 UTCMay 19, 17:30 UTC40m
2026-05-19 VTE3051 MWA → ORD May 19, 14:05 UTCMay 19, 15:05 UTC1h 0m
2026-05-18 VTE3054 ORD → MWA May 18, 23:05 UTCMay 18, 23:45 UTC40m
2026-05-18 VTE3024 MBL → ORD May 18, 21:25 UTCMay 18, 22:10 UTC45m
2026-05-18 VTE3027 ORD → MBL May 18, 18:00 UTCMay 18, 18:25 UTC25m
2026-05-18 VTE3020 MBL → ORD May 18, 14:20 UTCMay 18, 15:05 UTC45m
2026-05-18 VTE3029 ORD → MBL May 18, 01:05 UTCMay 18, 01:30 UTC25m
2026-05-17 VTE3024 MBL → ORD May 17, 22:35 UTCMay 17, 23:15 UTC40m
2026-05-17 VTE3027 ORD → MBL May 17, 21:25 UTCMay 17, 21:50 UTC25m
2026-05-17 VTE3071 IRK → ORD May 17, 18:55 UTCMay 17, 19:40 UTC45m
2026-05-17 VTE3068 ORD → IRK May 17, 16:50 UTCMay 17, 17:35 UTC45m
2026-05-17 VTE3010 BRL → ORD May 17, 14:20 UTCMay 17, 14:55 UTC35m
2026-05-16 VTE3011 ORD → BRL May 16, 18:25 UTCMay 16, 18:55 UTC30m
2026-05-16 VTE3051 MWA → ORD May 16, 14:05 UTCMay 16, 15:16 UTC1h 10m
2026-05-15 VTE3054 ORD → MWA May 15, 23:15 UTCMay 15, 23:55 UTC40m
2026-05-15 VTE3071 IRK → ORD May 15, 20:45 UTCMay 15, 21:35 UTC50m
2026-05-15 VTE8919 ORD → MQY May 15, 18:55 UTCMay 15, 19:55 UTC1h 0m
2026-05-11 VTE3693 ELD → DFW May 11, 19:20 UTCMay 11, 20:05 UTC45m
2026-05-11 VTE3692 DFW → ELD May 11, 16:50 UTCMay 11, 17:15 UTC26m
2026-05-11 VTE8919 ORD → MQY May 11, 13:30 UTCMay 11, 15:25 UTC1h 55m
2026-05-11 VTE8919 ORD → MQY May 11, 04:20 UTCMay 11, 05:20 UTC1h 0m
2026-05-10 VTE3047 UIN → ORD May 10, 22:30 UTCMay 10, 23:15 UTC45m
2026-05-10 VTE3046 ORD → UIN May 10, 20:40 UTCMay 10, 21:14 UTC35m
2026-05-10 VTE3548 TBN → ORD May 10, 17:34 UTCMay 10, 18:39 UTC1h 5m
2026-05-10 VTE3552 DFW → TBN May 10, 15:45 UTCMay 10, 16:44 UTC1h 0m
2026-05-10 VTE3696 DFW → ELD May 10, 12:49 UTCMay 10, 13:44 UTC55m
2026-05-09 VTE3696 DFW → ELD May 9, 22:20 UTCMay 9, 22:55 UTC35m
2026-05-09 VTE3551 TBN → DFW May 9, 19:25 UTCMay 9, 20:34 UTC1h 10m
2026-05-09 VTE3552 DFW → TBN May 9, 16:05 UTCMay 9, 17:00 UTC55m
2026-05-09 VTE3691 ELD → DFW May 9, 13:10 UTCMay 9, 14:10 UTC1h 0m
2026-05-09 VTE3696 DFW → ELD May 9, 00:50 UTCMay 9, 01:25 UTC35m

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 5h ago.
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, VTE3695, VTE3696, VTE3552, VTE3075.