Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

781F83

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-223R · BOEING 737-800

Hex
781F83
Octal
36017603
Decimal
7,872,387
Country
CN
Tail
B-223R
Type
B738
No current signal · last broadcast Jul 26, 11:35 UTC
Flights observed
267
Distinct callsigns
7
Country
CN
Last broadcast
Jul 26, 11:35 UTC

Last known position

Most recent position reported by Mode-S 781F83.

Country allocation

The ICAO 24-bit address 781F83 falls within the block assigned to China (CN) by ICAO Annex 10, Volume III. Every aircraft registered in China 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 7 distinct

Callsign Airline Flights Last seen
HLF8871 Hapagfly 67 2026-07-25
HLF8828 - 50 2026-07-26
HLF8827 - 49 2026-07-26
HLF8872 Hapagfly 48 2026-07-25
HLF8810 - 26 2026-07-06
HLF8809 - 26 2026-07-13
HLF8820 - 1 2026-06-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 HLF8828 - Jul 26, 09:30 UTCJul 26, 11:35 UTC2h 5m
2026-07-26 HLF8827 - Jul 26, 06:00 UTCJul 26, 08:05 UTC2h 6m
2026-07-25 HLF8872 KIX → YNT Jul 25, 20:35 UTCJul 25, 22:05 UTC1h 30m
2026-07-25 HLF8871 YNT → KIX Jul 25, 16:25 UTCJul 25, 18:00 UTC1h 35m
2026-07-25 HLF8828 - Jul 25, 09:35 UTCJul 25, 11:35 UTC2h 0m
2026-07-24 HLF8827 KIX → NRT Jul 24, 20:35 UTCJul 25, 07:45 UTC11h 10m
2026-07-24 HLF8871 YNT → KIX Jul 24, 16:50 UTCJul 24, 18:20 UTC1h 30m
2026-07-23 HLF8828 - Jul 23, 10:50 UTCJul 23, 13:00 UTC2h 10m
2026-07-23 HLF8827 - Jul 23, 06:55 UTCJul 23, 09:05 UTC2h 10m
2026-07-22 HLF8872 KIX → YNT Jul 22, 20:45 UTCJul 22, 22:05 UTC1h 20m
2026-07-22 HLF8871 YNT → KIX Jul 22, 16:50 UTCJul 22, 18:20 UTC1h 30m
2026-07-21 HLF8872 KIX → YNT Jul 21, 20:45 UTCJul 22, 11:40 UTC14h 55m
2026-07-21 HLF8871 YNT → KIX Jul 21, 16:40 UTCJul 21, 18:20 UTC1h 40m
2026-07-19 HLF8828 - Jul 19, 08:50 UTCJul 19, 10:45 UTC1h 55m
2026-07-18 HLF8827 KIX → NRT Jul 18, 20:40 UTCJul 19, 07:30 UTC10h 50m
2026-07-18 HLF8828 - Jul 18, 08:55 UTCJul 18, 18:20 UTC9h 25m
2026-07-18 HLF8827 - Jul 18, 05:30 UTCJul 18, 07:35 UTC2h 5m
2026-07-17 HLF8872 - Jul 17, 22:25 UTCJul 17, 23:50 UTC1h 25m
2026-07-17 HLF8871 YNT → KIX Jul 17, 16:44 UTCJul 17, 18:15 UTC1h 30m
2026-07-16 HLF8828 - Jul 16, 10:45 UTCJul 16, 12:44 UTC2h 0m
2026-07-15 HLF8827 KIX → NRT Jul 15, 20:30 UTCJul 16, 09:10 UTC12h 40m
2026-07-15 HLF8871 - Jul 15, 16:50 UTCJul 15, 18:20 UTC1h 30m
2026-07-14 HLF8872 - Jul 14, 20:35 UTCJul 14, 22:00 UTC1h 25m
2026-07-14 HLF8871 - Jul 14, 16:40 UTCJul 14, 18:05 UTC1h 25m
2026-07-14 HLF8828 - Jul 14, 09:40 UTCJul 14, 11:30 UTC1h 50m
2026-07-13 HLF8827 KIX → NRT Jul 13, 20:40 UTCJul 14, 08:20 UTC11h 40m
2026-07-13 HLF8871 - Jul 13, 02:45 UTCJul 13, 18:25 UTC15h 40m
2026-07-13 HLF8809 - Jul 13, 00:40 UTCJul 13, 01:01 UTC20m
2026-07-12 HLF8828 - Jul 12, 08:40 UTCJul 12, 10:40 UTC2h 0m
2026-07-11 HLF8827 KIX → NRT Jul 11, 20:25 UTCJul 12, 07:25 UTC11h 0m
2026-07-11 HLF8828 - Jul 11, 08:40 UTCJul 11, 18:30 UTC9h 50m
2026-07-10 HLF8827 - Jul 10, 20:30 UTCJul 11, 07:30 UTC11h 1m
2026-07-10 HLF8871 - Jul 10, 16:50 UTCJul 10, 18:15 UTC1h 25m
2026-07-09 HLF8828 - Jul 9, 12:00 UTCJul 9, 13:55 UTC1h 55m
2026-07-08 HLF8827 - Jul 8, 19:30 UTCJul 9, 10:35 UTC15h 5m
2026-07-08 HLF8871 - Jul 8, 16:30 UTCJul 8, 18:00 UTC1h 30m
2026-07-07 HLF8872 - Jul 7, 20:40 UTCJul 7, 22:00 UTC1h 20m
2026-07-07 HLF8871 - Jul 7, 16:40 UTCJul 7, 18:15 UTC1h 35m
2026-07-07 HLF8828 - Jul 7, 10:35 UTCJul 7, 12:35 UTC2h 0m
2026-07-06 HLF8827 KIX → NRT Jul 6, 20:40 UTCJul 7, 07:45 UTC11h 5m
2026-07-06 HLF8871 - Jul 6, 16:50 UTCJul 6, 18:20 UTC1h 30m
2026-07-06 HLF8810 - Jul 6, 02:45 UTCJul 6, 03:05 UTC20m
2026-07-06 HLF8809 - Jul 6, 00:30 UTCJul 6, 00:50 UTC20m
2026-07-05 HLF8828 - Jul 5, 08:50 UTCJul 5, 11:00 UTC2h 10m
2026-07-04 HLF8827 KIX → NRT Jul 4, 20:30 UTCJul 5, 07:30 UTC11h 0m
2026-07-04 HLF8871 - Jul 4, 16:40 UTCJul 4, 18:00 UTC1h 20m
2026-07-04 HLF8828 - Jul 4, 09:30 UTCJul 4, 11:40 UTC2h 10m
2026-07-03 HLF8827 KIX → NRT Jul 3, 20:35 UTCJul 4, 08:10 UTC11h 35m
2026-07-03 HLF8871 - Jul 3, 17:00 UTCJul 3, 18:20 UTC1h 20m
2026-07-02 HLF8828 - Jul 2, 12:15 UTCJul 2, 14:25 UTC2h 10m

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 B-223R page for operator, model, and routing details .

Mode-S 781F83 frequently asked

What is Mode-S code 781F83?
781F83 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-223R.
Where is Mode-S 781F83 registered?
Mode-S code 781F83 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781F83 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 11:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781F83, octal 36017603, decimal 7,872,387.
What flights does 781F83 operate?
Mode-S 781F83 has broadcast 7 distinct callsigns, including HLF8871, HLF8828, HLF8827, HLF8872, HLF8810.