Apparatus

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sensors Mode-S transponder

7C42D1

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to VH-NHF · FOKKER 100 · operated by NETWORK AVIATION PTY LTD

Hex
7C42D1
Octal
37041321
Decimal
8,143,569
Country
AU
Tail
VH-NHF
Type
F100
No current signal · last broadcast 4h ago
Flights observed
129
Distinct callsigns
20
Country
AU
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S 7C42D1.

Country allocation

The ICAO 24-bit address 7C42D1 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 20 distinct

Callsign Airline Flights Last seen
NWK1615 - 11 2026-07-07
NWK1614 - 11 2026-07-07
NWK1612 - 8 2026-06-30
NWK1613 - 7 2026-07-01
NWK1770 - 5 2026-07-12
NWK1712 - 5 2026-07-13
NWK1772 - 4 2026-06-29
NWK1618 - 4 2026-06-11
NWK2940 - 3 2026-05-29
NWK2908 - 3 2026-05-31
NWK2902 - 3 2026-06-23
NWK1630 - 3 2026-06-10
NWK1624 - 3 2026-05-14
NWK6237 - 2 2026-06-16
NWK2950 - 2 2026-06-26
NWK2920 - 2 2026-07-05
NWK2918 - 2 2026-05-27
NWK2910 - 2 2026-07-06
NWK2909 - 2 2026-04-15
NWK1650 - 2 2026-07-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 NWK2922 - Jul 13, 22:00 UTCJul 13, 22:35 UTC35m
2026-07-13 NWK1712 PER → PER Jul 13, 08:40 UTCJul 13, 12:40 UTC4h 0m
2026-07-12 NWK1770 PER → PER Jul 12, 21:10 UTCJul 13, 01:30 UTC4h 20m
2026-07-12 NWK6520 PER → PER Jul 12, 08:10 UTCJul 12, 12:10 UTC4h 0m
2026-07-10 NWK2929 PER → PER Jul 10, 06:00 UTCJul 10, 10:05 UTC4h 5m
2026-07-09 NWK1770 PER → PER Jul 9, 22:20 UTCJul 10, 02:40 UTC4h 20m
2026-07-09 NWK1651 PER → PER Jul 9, 07:45 UTCJul 9, 12:45 UTC5h 0m
2026-07-08 NWK6521 PER → PER Jul 8, 22:20 UTCJul 9, 04:10 UTC5h 50m
2026-07-07 NWK1615 - Jul 7, 10:50 UTCJul 7, 11:25 UTC35m
2026-07-07 NWK1614 - Jul 7, 08:50 UTCJul 7, 09:20 UTC30m
2026-07-06 NWK2910 PER → PER Jul 6, 22:35 UTCJul 7, 05:30 UTC6h 55m
2026-07-06 NWK1615 - Jul 6, 10:30 UTCJul 6, 11:15 UTC45m
2026-07-06 NWK1614 - Jul 6, 08:40 UTCJul 6, 09:15 UTC35m
2026-07-05 NWK2920 PER → PER Jul 5, 22:40 UTCJul 6, 02:55 UTC4h 15m
2026-07-02 NWK1650 PER → PER Jul 2, 07:35 UTCJul 2, 12:25 UTC4h 50m
2026-07-01 NWK1722 PER → PER Jul 1, 04:05 UTCJul 1, 09:00 UTC4h 55m
2026-07-01 NWK1613 - Jul 1, 01:25 UTCJul 1, 02:05 UTC40m
2026-06-30 NWK1612 - Jun 30, 23:35 UTCJul 1, 00:05 UTC30m
2026-06-30 NWK2954 PER → PER Jun 30, 09:05 UTCJun 30, 12:55 UTC3h 50m
2026-06-30 NWK1613 - Jun 30, 03:35 UTCJun 30, 04:15 UTC40m
2026-06-29 NWK1612 - Jun 29, 23:14 UTCJun 29, 23:44 UTC30m
2026-06-29 NWK1772 PER → PER Jun 29, 04:14 UTCJun 29, 08:29 UTC4h 15m
2026-06-28 NWK2921 PER → PER Jun 28, 22:29 UTCJun 29, 02:39 UTC4h 10m
2026-06-26 NWK2950 PER → PER Jun 26, 23:55 UTCJun 27, 09:55 UTC10h 0m
2026-06-26 NWK2930 PER → PER Jun 26, 05:35 UTCJun 26, 10:10 UTC4h 35m
2026-06-26 NWK1613 - Jun 26, 02:24 UTCJun 26, 03:05 UTC40m
2026-06-25 NWK1612 - Jun 25, 23:34 UTCJun 26, 00:05 UTC30m
2026-06-25 NWK2777 KGI → PER Jun 25, 10:39 UTCJun 25, 11:50 UTC1h 10m
2026-06-25 NWK2776 PER → KGI Jun 25, 08:20 UTCJun 25, 09:10 UTC50m
2026-06-23 NWK2902 PER → PER Jun 23, 22:40 UTCJun 24, 05:40 UTC7h 0m
2026-06-23 NWK1615 - Jun 23, 10:39 UTCJun 23, 11:14 UTC35m
2026-06-23 NWK1614 - Jun 23, 08:50 UTCJun 23, 09:20 UTC30m
2026-06-22 NWK2910 PER → PER Jun 22, 22:44 UTCJun 23, 05:39 UTC6h 55m
2026-06-22 NWK1615 - Jun 22, 10:30 UTCJun 22, 11:04 UTC35m
2026-06-22 NWK1614 - Jun 22, 08:40 UTCJun 22, 09:10 UTC30m
2026-06-21 NWK1770 PER → PER Jun 21, 21:10 UTCJun 22, 01:19 UTC4h 10m
2026-06-21 NWK1615 - Jun 21, 10:44 UTCJun 21, 11:20 UTC35m
2026-06-21 NWK1614 - Jun 21, 08:49 UTCJun 21, 09:20 UTC30m
2026-06-19 NWK1611 KGI → PER Jun 19, 11:24 UTCJun 19, 12:25 UTC1h 0m
2026-06-19 NWK1610 PER → KGI Jun 19, 09:24 UTCJun 19, 10:14 UTC50m
2026-06-18 NWK1772 PER → PER Jun 18, 22:55 UTCJun 19, 08:20 UTC9h 24m
2026-06-18 NWK1613 - Jun 18, 09:25 UTCJun 18, 10:05 UTC40m
2026-06-18 NWK1612 - Jun 18, 08:00 UTCJun 18, 08:30 UTC30m
2026-06-18 NWK1612 - Jun 18, 00:35 UTCJun 18, 01:15 UTC40m
2026-06-17 NWK1612 - Jun 17, 23:25 UTCJun 17, 23:50 UTC25m
2026-06-16 NWK2902 PER → PER Jun 16, 22:35 UTCJun 17, 05:20 UTC6h 45m
2026-06-16 NWK6237 - Jun 16, 05:25 UTCJun 16, 06:04 UTC40m
2026-06-15 NWK1772 - Jun 15, 04:00 UTCJun 15, 04:45 UTC45m
2026-06-14 NWK2920 PER → PER Jun 14, 22:35 UTCJun 15, 02:55 UTC4h 19m
2026-06-14 NWK1615 - Jun 14, 10:35 UTCJun 14, 11:10 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 VH-NHF page for operator, model, and routing details .

Mode-S 7C42D1 frequently asked

What is Mode-S code 7C42D1?
7C42D1 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-NHF.
Where is Mode-S 7C42D1 registered?
Mode-S code 7C42D1 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C42D1 broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C42D1, octal 37041321, decimal 8,143,569.
What flights does 7C42D1 operate?
Mode-S 7C42D1 has broadcast 20 distinct callsigns, including NWK1615, NWK1614, NWK1612, NWK1613, NWK1770.