Apparatus

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sensors Mode-S transponder

7C42D9

ICAO 24-bit transponder address · allocated to Australia

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

Hex
7C42D9
Octal
37041331
Decimal
8,143,577
Country
AU
Tail
VH-NHN
Type
F100
No current signal · last broadcast Jul 26, 22:10 UTC
Flights observed
104
Distinct callsigns
20
Country
AU
Last broadcast
Jul 26, 22:10 UTC

Last known position

Most recent position reported by Mode-S 7C42D9.

Country allocation

The ICAO 24-bit address 7C42D9 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
NWK1613 - 7 2026-07-22
NWK1612 - 7 2026-07-21
NWK1600 - 6 2026-06-29
NWK1770 - 4 2026-07-16
NWK1634 - 4 2026-07-09
NWK1615 - 4 2026-06-29
NWK1614 - 4 2026-06-29
NWK2941 - 3 2026-04-18
NWK2928 - 3 2026-07-17
NWK2900 - 3 2026-07-26
NWK1722 - 3 2026-07-22
NWK1712 - 3 2026-07-21
NWK1611 - 3 2026-07-02
NWK1610 - 3 2026-07-02
NWK2954 - 2 2026-07-06
NWK2940 - 2 2026-04-17
NWK2930 - 2 2026-06-05
NWK2924 - 2 2026-07-03
NWK2908 - 2 2026-06-08
NWK2901 - 2 2026-05-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 NWK2900 - Jul 26, 21:40 UTCJul 26, 22:10 UTC30m
2026-07-23 NWK1618 PER → PER Jul 23, 22:40 UTCJul 24, 02:45 UTC4h 5m
2026-07-23 NWK1650 PER → PER Jul 23, 07:55 UTCJul 23, 14:05 UTC6h 10m
2026-07-23 NWK1721 PER → PER Jul 23, 00:05 UTCJul 23, 05:05 UTC5h 0m
2026-07-22 NWK1722 - Jul 22, 03:40 UTCJul 22, 04:15 UTC35m
2026-07-22 NWK1613 - Jul 22, 01:20 UTCJul 22, 01:55 UTC35m
2026-07-21 NWK1612 - Jul 21, 23:30 UTCJul 22, 00:00 UTC30m
2026-07-21 NWK1712 PER → PER Jul 21, 08:45 UTCJul 21, 12:30 UTC3h 45m
2026-07-21 NWK1613 - Jul 21, 03:15 UTCJul 21, 04:10 UTC55m
2026-07-20 NWK1612 - Jul 20, 23:40 UTCJul 21, 00:10 UTC30m
2026-07-20 NWK1624 PER → PER Jul 20, 08:15 UTCJul 20, 12:00 UTC3h 45m
2026-07-20 NWK1630 PER → PER Jul 20, 00:00 UTCJul 20, 04:15 UTC4h 15m
2026-07-17 NWK2928 PER → PER Jul 17, 06:15 UTCJul 17, 10:44 UTC4h 30m
2026-07-16 NWK1770 PER → PER Jul 16, 22:19 UTCJul 17, 02:34 UTC4h 15m
2026-07-16 NWK1723 PER → PER Jul 16, 03:45 UTCJul 16, 08:30 UTC4h 45m
2026-07-13 NWK1624 PER → PER Jul 13, 07:50 UTCJul 13, 11:35 UTC3h 45m
2026-07-12 NWK1631 PER → PER Jul 12, 23:40 UTCJul 13, 03:55 UTC4h 15m
2026-07-09 NWK2760 PER → PER Jul 9, 21:15 UTCJul 10, 01:30 UTC4h 15m
2026-07-09 NWK1634 PER → PER Jul 9, 04:50 UTCJul 9, 08:45 UTC3h 55m
2026-07-08 NWK1722 PER → PER Jul 8, 03:40 UTCJul 8, 08:15 UTC4h 35m
2026-07-08 NWK1613 - Jul 8, 01:40 UTCJul 8, 02:20 UTC40m
2026-07-08 NWK1612 - Jul 8, 00:10 UTCJul 8, 00:35 UTC25m
2026-07-06 NWK2954 PER → PER Jul 6, 00:30 UTCJul 6, 07:55 UTC7h 25m
2026-07-03 NWK2924 PER → PER Jul 3, 04:55 UTCJul 3, 10:05 UTC5h 10m
2026-07-02 NWK1619 PER → PER Jul 2, 22:50 UTCJul 3, 02:55 UTC4h 5m
2026-07-02 NWK1611 - Jul 2, 11:35 UTCJul 2, 12:35 UTC1h 0m
2026-07-02 NWK1610 PER → KGI Jul 2, 10:00 UTCJul 2, 10:50 UTC50m
2026-07-02 NWK1634 PER → PER Jul 2, 04:55 UTCJul 2, 08:50 UTC3h 55m
2026-06-30 NWK1601 - Jun 30, 04:40 UTCJun 30, 05:20 UTC40m
2026-06-29 NWK1600 PER → GET Jun 29, 23:34 UTCJun 30, 00:20 UTC45m
2026-06-29 NWK1615 - Jun 29, 11:45 UTCJun 29, 12:24 UTC40m
2026-06-29 NWK1614 - Jun 29, 08:39 UTCJun 29, 09:14 UTC35m
2026-06-28 NWK1770 PER → PER Jun 28, 21:14 UTCJun 29, 01:50 UTC4h 35m
2026-06-24 NWK1603 - Jun 24, 09:09 UTCJun 24, 09:55 UTC45m
2026-06-19 NWK1615 - Jun 19, 10:39 UTCJun 19, 11:14 UTC35m
2026-06-19 NWK1614 - Jun 19, 08:50 UTCJun 19, 09:19 UTC30m
2026-06-19 NWK1613 - Jun 19, 01:19 UTCJun 19, 02:04 UTC45m
2026-06-18 NWK1612 - Jun 18, 23:30 UTCJun 18, 23:55 UTC25m
2026-06-18 NWK1615 - Jun 18, 10:45 UTCJun 18, 11:30 UTC45m
2026-06-18 NWK1614 - Jun 18, 08:35 UTCJun 18, 09:05 UTC30m
2026-06-08 NWK2908 PER → PER Jun 8, 21:50 UTCJun 8, 23:20 UTC1h 30m
2026-06-08 NWK1712 PER → PER Jun 8, 08:50 UTCJun 8, 12:50 UTC4h 0m
2026-06-08 NWK2954 PER → PER Jun 8, 00:30 UTCJun 8, 04:40 UTC4h 10m
2026-06-05 NWK2930 PER → PER Jun 5, 05:40 UTCJun 5, 10:10 UTC4h 30m
2026-06-05 NWK1613 - Jun 5, 01:30 UTCJun 5, 02:10 UTC40m
2026-06-04 NWK1612 - Jun 4, 23:30 UTCJun 5, 00:00 UTC30m
2026-06-03 NWK1770 PER → PER Jun 3, 21:15 UTCJun 4, 04:15 UTC7h 0m
2026-06-02 NWK1600 PER → PER Jun 2, 21:55 UTCJun 3, 10:00 UTC12h 5m
2026-06-01 NWK1600 PER → PER Jun 1, 23:50 UTCJun 2, 08:10 UTC8h 20m
2026-06-01 NWK2955 PER → PER Jun 1, 00:40 UTCJun 1, 05:00 UTC4h 20m

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-NHN page for operator, model, and routing details .

Mode-S 7C42D9 frequently asked

What is Mode-S code 7C42D9?
7C42D9 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-NHN.
Where is Mode-S 7C42D9 registered?
Mode-S code 7C42D9 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C42D9 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C42D9, octal 37041331, decimal 8,143,577.
What flights does 7C42D9 operate?
Mode-S 7C42D9 has broadcast 20 distinct callsigns, including NWK1613, NWK1612, NWK1600, NWK1770, NWK1634.