Apparatus

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sensors Mode-S transponder

A4CA73

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N408BA · CESSNA 408 SkyCourier · operated by NORTON BASIN SERVICES

Hex
A4CA73
Octal
51145163
Decimal
10,799,731
Country
US
Tail
N408BA
Type
C408
Broadcasting now · callsign BRG1062 · 10,450 ft
Flights observed
129
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Current position

A4CA73 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A4CA73 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
BRG1066 - 27 2026-07-03
BRG1067 - 14 2026-07-05
BRG1062 - 14 2026-07-01
BRG1064 - 13 2026-07-05
BRG1166 - 11 2026-07-03
BRG1061 Bering Air 11 2026-06-05
BRG1088 Bering Air 6 2026-05-25
BRG1266 - 5 2026-07-03
BRG1167 Bering Air 4 2026-06-11
BRG1068 - 4 2026-07-05
BRG1065 - 3 2026-06-30
BRG572 Bering Air 2 2026-06-10
BRG551 Bering Air 2 2026-06-08
BRG1164 - 2 2026-06-01
BRG1162 - 2 2026-06-12
BRG1060 Bering Air 2 2026-06-04
BRG961 - 1 2026-06-26
BRG570 Bering Air 1 2026-06-16
BRG1288 Bering Air 1 2026-06-04
BRG1188 Bering Air 1 2026-04-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-05 BRG1068 OTZ → OTZ Jul 5, 21:35 UTCJul 5, 22:20 UTC45m
2026-07-05 BRG1067 - Jul 5, 20:30 UTCJul 5, 20:55 UTC25m
2026-07-05 BRG1067 OTZ → KVL Jul 5, 19:35 UTCJul 5, 20:00 UTC25m
2026-07-05 BRG1064 OTZ → OTZ Jul 5, 17:35 UTCJul 5, 18:45 UTC1h 10m
2026-07-03 BRG1266 - Jul 3, 22:05 UTCJul 3, 23:50 UTC1h 45m
2026-07-03 BRG1166 OTZ → OTZ Jul 3, 19:50 UTCJul 3, 21:40 UTC1h 50m
2026-07-03 BRG1066 - Jul 3, 18:10 UTCJul 3, 18:55 UTC45m
2026-07-03 BRG1066 - Jul 3, 16:50 UTCJul 3, 17:30 UTC40m
2026-07-03 BRG1266 - Jul 3, 00:10 UTCJul 3, 00:55 UTC45m
2026-07-02 BRG1266 - Jul 2, 23:00 UTCJul 2, 23:25 UTC25m
2026-07-02 BRG1166 - Jul 2, 21:35 UTCJul 2, 22:10 UTC35m
2026-07-02 BRG1166 - Jul 2, 20:20 UTCJul 2, 21:00 UTC40m
2026-07-02 BRG1066 - Jul 2, 19:10 UTCJul 2, 19:45 UTC35m
2026-07-02 BRG1066 - Jul 2, 17:35 UTCJul 2, 18:05 UTC30m
2026-07-02 BRG1266 - Jul 2, 00:30 UTCJul 2, 01:10 UTC40m
2026-07-01 BRG1266 - Jul 1, 23:15 UTCJul 1, 23:55 UTC40m
2026-07-01 BRG1166 - Jul 1, 22:15 UTCJul 1, 22:40 UTC25m
2026-07-01 BRG1166 - Jul 1, 20:50 UTCJul 1, 21:25 UTC35m
2026-07-01 BRG1066 - Jul 1, 19:00 UTCJul 1, 19:30 UTC30m
2026-07-01 BRG1066 - Jul 1, 17:25 UTCJul 1, 17:55 UTC30m
2026-07-01 BRG1062 - Jul 1, 01:10 UTCJul 1, 01:50 UTC40m
2026-07-01 BRG1062 OTZ → ABL Jul 1, 00:05 UTCJul 1, 00:45 UTC40m
2026-06-30 BRG1065 - Jun 30, 22:45 UTCJun 30, 23:05 UTC20m
2026-06-30 BRG1065 OTZ → WLK Jun 30, 21:50 UTCJun 30, 22:10 UTC20m
2026-06-30 BRG1064 OTZ → OTZ Jun 30, 20:10 UTCJun 30, 21:10 UTC1h 0m
2026-06-30 BRG1066 OTZ → OTZ Jun 30, 17:10 UTCJun 30, 18:50 UTC1h 40m
2026-06-28 BRG1068 OTZ → OTZ Jun 28, 22:10 UTCJun 28, 22:59 UTC50m
2026-06-28 BRG1166 OTZ → OTZ Jun 28, 19:40 UTCJun 28, 21:24 UTC1h 45m
2026-06-28 BRG1066 OTZ → OTZ Jun 28, 17:04 UTCJun 28, 18:55 UTC1h 50m
2026-06-27 BRG1064 OTZ → OTZ Jun 27, 22:09 UTCJun 27, 23:14 UTC1h 5m
2026-06-27 BRG1066 - Jun 27, 20:49 UTCJun 27, 21:29 UTC40m
2026-06-27 BRG1066 - Jun 27, 19:39 UTCJun 27, 20:19 UTC40m
2026-06-26 BRG1066 OTZ → OTZ Jun 26, 22:19 UTCJun 27, 00:10 UTC1h 50m
2026-06-26 BRG961 OTZ → OTZ Jun 26, 21:35 UTCJun 26, 21:39 UTC5m
2026-06-25 BRG1062 OTZ → ABL Jun 25, 21:25 UTCJun 25, 23:14 UTC1h 50m
2026-06-25 BRG1067 KVL → OTZ Jun 25, 20:19 UTCJun 25, 20:49 UTC30m
2026-06-25 BRG1067 KVL → OTZ Jun 25, 19:24 UTCJun 25, 19:49 UTC25m
2026-06-24 BRG1166 OTZ → OTZ Jun 24, 22:35 UTCJun 25, 00:19 UTC1h 45m
2026-06-24 BRG1066 OTZ → PHO Jun 24, 20:09 UTCJun 24, 21:54 UTC1h 45m
2026-06-24 BRG1062 OTZ → ABL Jun 24, 18:55 UTCJun 24, 19:34 UTC40m
2026-06-24 BRG1062 OTZ → ABL Jun 24, 17:55 UTCJun 24, 18:29 UTC35m
2026-06-23 BRG1166 - Jun 23, 21:29 UTCJun 23, 23:14 UTC1h 45m
2026-06-23 BRG1066 OTZ → PHO Jun 23, 19:04 UTCJun 23, 20:54 UTC1h 50m
2026-06-23 BRG1068 WTK → OTZ Jun 23, 01:30 UTCJun 23, 02:24 UTC55m
2026-06-17 BRG1065 OTZ → OTZ Jun 17, 21:00 UTCJun 17, 22:10 UTC1h 10m
2026-06-17 BRG1067 KVL → OTZ Jun 17, 19:50 UTCJun 17, 20:15 UTC25m
2026-06-17 BRG1067 KVL → OTZ Jun 17, 19:05 UTCJun 17, 19:30 UTC25m
2026-06-16 BRG570 OTZ → PHO Jun 16, 20:35 UTCJun 16, 20:55 UTC20m
2026-06-16 BRG0570 OTZ → KVL Jun 16, 19:55 UTCJun 16, 20:20 UTC25m
2026-06-14 BRG1062 OTZ → ABL Jun 14, 23:50 UTCJun 15, 00:29 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 N408BA page for operator, model, and routing details .

Mode-S A4CA73 frequently asked

What is Mode-S code A4CA73?
A4CA73 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N408BA.
Where is Mode-S A4CA73 registered?
Mode-S code A4CA73 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 A4CA73 broadcasting right now?
Yes. Mode-S A4CA73 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4CA73, octal 51145163, decimal 10,799,731.
What flights does A4CA73 operate?
Mode-S A4CA73 has broadcast 20 distinct callsigns, including BRG1066, BRG1067, BRG1062, BRG1064, BRG1166.