Apparatus

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sensors Mode-S transponder

7C0A2B

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to VH-CAL · CESSNA 172 Skyhawk · operated by TEXRIO PTY LTD

Hex
7C0A2B
Octal
37005053
Decimal
8,129,067
Country
AU
Tail
VH-CAL
Type
C172
No current signal · last broadcast 29d ago
Flights observed
78
Distinct callsigns
1
Country
AU
Last broadcast
29d ago

Last known position

Most recent position reported by Mode-S 7C0A2B.

Country allocation

The ICAO 24-bit address 7C0A2B falls within the block assigned to Australia (AU) by ICAO Annex 10, Volume III. Every aircraft registered in Australia 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
CAL - 78 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CAL KGI → KGI Jul 26, 07:15 UTCJul 26, 08:00 UTC45m
2026-07-26 CAL KGI → KGI Jul 26, 03:05 UTCJul 26, 03:30 UTC25m
2026-07-26 CAL KGI → KGI Jul 26, 01:45 UTCJul 26, 02:15 UTC30m
2026-07-26 CAL KGI → KGI Jul 26, 00:15 UTCJul 26, 00:30 UTC15m
2026-07-25 CAL KGI → KGI Jul 25, 01:10 UTCJul 25, 01:40 UTC30m
2026-07-24 CAL KGI → KGI Jul 24, 03:50 UTCJul 24, 04:25 UTC35m
2026-07-24 CAL KGI → KGI Jul 24, 01:25 UTCJul 24, 02:10 UTC45m
2026-07-23 CAL KGI → KGI Jul 23, 07:35 UTCJul 23, 07:50 UTC15m
2026-07-22 CAL KGI → KGI Jul 22, 04:40 UTCJul 22, 05:25 UTC45m
2026-07-18 CAL - Jul 18, 03:25 UTCJul 18, 04:10 UTC45m
2026-07-18 CAL KGI → KGI Jul 18, 02:35 UTCJul 18, 03:05 UTC31m
2026-07-16 CAL - Jul 16, 07:35 UTCJul 16, 08:00 UTC25m
2026-07-16 CAL KGI → KGI Jul 16, 04:30 UTCJul 16, 05:35 UTC1h 5m
2026-07-16 CAL KGI → KGI Jul 16, 02:55 UTCJul 16, 03:15 UTC20m
2026-07-15 CAL - Jul 15, 09:00 UTCJul 15, 09:15 UTC15m
2026-07-15 CAL - Jul 15, 04:25 UTCJul 15, 04:50 UTC25m
2026-07-15 CAL KGI → KGI Jul 15, 02:10 UTCJul 15, 02:50 UTC40m
2026-07-13 CAL KGI → KGI Jul 13, 06:01 UTCJul 13, 06:30 UTC30m
2026-07-11 CAL KGI → KGI Jul 11, 23:50 UTCJul 12, 00:15 UTC25m
2026-07-09 CAL KGI → KGI Jul 9, 01:25 UTCJul 9, 01:45 UTC20m
2026-07-09 CAL KGI → KGI Jul 9, 00:05 UTCJul 9, 00:25 UTC20m
2026-07-08 CAL KGI → KGI Jul 8, 08:00 UTCJul 8, 08:40 UTC40m
2026-07-08 CAL - Jul 8, 06:00 UTCJul 8, 06:25 UTC25m
2026-07-08 CAL - Jul 8, 05:10 UTCJul 8, 05:20 UTC10m
2026-07-07 CAL KGI → KGI Jul 7, 07:40 UTCJul 7, 08:15 UTC35m
2026-07-06 CAL - Jul 6, 04:25 UTCJul 6, 04:40 UTC15m
2026-07-06 CAL - Jul 6, 02:30 UTCJul 6, 02:50 UTC20m
2026-07-05 CAL KGI → KGI Jul 5, 06:30 UTCJul 5, 07:20 UTC50m
2026-07-05 CAL KGI → KGI Jul 5, 04:25 UTCJul 5, 04:45 UTC20m
2026-07-05 CAL KGI → KGI Jul 5, 01:55 UTCJul 5, 02:30 UTC35m
2026-07-04 CAL - Jul 4, 23:50 UTCJul 5, 00:15 UTC25m
2026-07-02 CAL KGI → KGI Jul 2, 07:15 UTCJul 2, 07:55 UTC40m
2026-07-01 CAL KGI → KGI Jul 1, 06:40 UTCJul 1, 07:15 UTC35m
2026-06-29 CAL KGI → KGI Jun 29, 05:45 UTCJun 29, 06:09 UTC25m
2026-06-29 CAL KGI → KGI Jun 29, 04:20 UTCJun 29, 04:50 UTC30m
2026-06-28 CAL - Jun 28, 07:05 UTCJun 28, 07:50 UTC45m
2026-06-28 CAL KGI → KGI Jun 28, 05:45 UTCJun 28, 06:15 UTC30m
2026-06-28 CAL KGI → KGI Jun 28, 05:09 UTCJun 28, 05:20 UTC10m
2026-06-28 CAL KGI → KGI Jun 28, 01:10 UTCJun 28, 01:40 UTC30m
2026-06-28 CAL KGI → KGI Jun 28, 00:09 UTCJun 28, 00:35 UTC25m
2026-06-27 CAL KGI → KGI Jun 27, 23:39 UTCJun 28, 00:00 UTC20m
2026-06-23 CAL KGI → KGI Jun 23, 03:15 UTCJun 23, 03:39 UTC25m
2026-06-22 CAL KGI → KGI Jun 22, 05:04 UTCJun 22, 05:49 UTC45m
2026-06-21 CAL KGI → KGI Jun 21, 06:55 UTCJun 21, 07:40 UTC45m
2026-06-21 CAL KGI → KGI Jun 21, 04:44 UTCJun 21, 05:04 UTC20m
2026-06-21 CAL KGI → KGI Jun 21, 03:00 UTCJun 21, 03:55 UTC55m
2026-06-21 CAL KGI → KGI Jun 21, 00:29 UTCJun 21, 00:45 UTC15m
2026-06-20 CAL KGI → KGI Jun 20, 23:50 UTCJun 21, 00:14 UTC25m
2026-06-20 CAL - Jun 20, 08:05 UTCJun 20, 08:39 UTC35m
2026-06-20 CAL KGI → KGI Jun 20, 07:14 UTCJun 20, 07:39 UTC25m

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 VH-CAL page for operator, model, and routing details .

Mode-S 7C0A2B frequently asked

What is Mode-S code 7C0A2B?
7C0A2B is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-CAL.
Where is Mode-S 7C0A2B registered?
Mode-S code 7C0A2B is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C0A2B broadcasting right now?
No active broadcast right now. Last signal was 29d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C0A2B, octal 37005053, decimal 8,129,067.
What flights does 7C0A2B operate?
Mode-S 7C0A2B has broadcast 1 distinct callsign, including CAL.