sensors Mode-S transponder

88815C

ICAO 24-bit transponder address · allocated to Vietnam

Currently assigned to VN-A693 · AIRBUS A-321neo

Hex
88815C
Octal
42100534
Decimal
8,946,012
Country
VN
Tail
VN-A693
Type
A21N
No current signal · last broadcast 15h ago
Flights observed
6
Distinct callsigns
4
Country
VN
Last broadcast
15h ago

Last known position

Most recent position reported by Mode-S 88815C.

Country allocation

The ICAO 24-bit address 88815C falls within the block assigned to Vietnam (VN) by ICAO Annex 10, Volume III. Every aircraft registered in Vietnam 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 4 distinct

Callsign Airline Flights Last seen
VJC854 - 2 2026-04-14
VJC1805 VietJet Air 2 2026-04-13
VJC855 VietJet Air 1 2026-04-14
VJC1806 - 1 2026-04-13

Recent flights last 6

DateFlightRouteTakeoffLandingDuration
2026-04-14 VJC854 - Apr 14, 07:45 UTCApr 14, 08:10 UTC25m
2026-04-14 VJC854 - Apr 14, 06:45 UTCApr 14, 06:55 UTC10m
2026-04-14 VJC855 SGN → CGK Apr 14, 05:20 UTCApr 14, 05:30 UTC10m
2026-04-13 VJC1806 - Apr 13, 20:55 UTCApr 13, 23:05 UTC2h 10m
2026-04-13 VJC1805 SGN → AMD Apr 13, 15:50 UTCApr 13, 16:20 UTC30m
2026-04-13 VJC1805 SGN → AMD Apr 13, 15:25 UTCApr 13, 16:15 UTC50m

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 VN-A693 page for operator, model, and routing details .

Mode-S 88815C frequently asked

What is Mode-S code 88815C?
88815C is an ICAO 24-bit transponder address. Allocated to Vietnam. Assigned to VN-A693.
Where is Mode-S 88815C registered?
Mode-S code 88815C is allocated to Vietnam (VN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 88815C broadcasting right now?
No active broadcast right now. Last signal was 15h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 88815C, octal 42100534, decimal 8,946,012.
What flights does 88815C operate?
Mode-S 88815C has broadcast 4 distinct callsigns, including VJC854, VJC1805, VJC855, VJC1806.