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sensors Mode-S transponder

8881F4

ICAO 24-bit transponder address · allocated to Vietnam

Currently assigned to VN-A549 · AIRBUS A-321neo

Hex
8881F4
Octal
42100764
Decimal
8,946,164
Country
VN
Tail
VN-A549
Type
A21N
No current signal · last broadcast Jul 26, 23:00 UTC
Flights observed
194
Distinct callsigns
20
Country
VN
Last broadcast
Jul 26, 23:00 UTC

Last known position

Most recent position reported by Mode-S 8881F4.

Country allocation

The ICAO 24-bit address 8881F4 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 20 distinct

Callsign Airline Flights Last seen
VJC918 VietJet Air 12 2026-07-23
VJC7620 - 10 2026-07-18
VJC5068 - 10 2026-07-21
VJC919 VietJet Air 9 2026-07-23
VJC5069 - 9 2026-07-22
VJC7621 - 8 2026-07-19
VJC883 - 6 2026-06-13
VJC7614 - 5 2026-07-19
VJC935 VietJet Air 3 2026-06-28
VJC934 - 3 2026-06-28
VJC933 - 3 2026-07-02
VJC932 - 3 2026-07-01
VJC884 VietJet Air 3 2026-06-13
VJC7615 - 3 2026-07-20
VJC1802 VietJet Air 3 2026-07-26
VJC1801 VietJet Air 3 2026-07-26
VJC979 VietJet Air 2 2026-07-25
VJC978 VietJet Air 2 2026-07-25
VJC949 - 2 2026-07-10
VJC948 - 2 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 VJC1802 BLR → SGN Jul 26, 20:55 UTCJul 26, 23:00 UTC2h 5m
2026-07-26 VJC1802 BLR → SGN Jul 26, 20:00 UTCJul 26, 20:15 UTC15m
2026-07-26 VJC1801 SGN → BLR Jul 26, 18:20 UTCJul 26, 18:40 UTC20m
2026-07-26 VJC1801 SGN → BLR Jul 26, 08:15 UTCJul 26, 17:45 UTC9h 30m
2026-07-25 VJC979 ICN → PQC Jul 25, 19:15 UTCJul 26, 07:05 UTC11h 51m
2026-07-25 VJC978 PQC → ICN Jul 25, 15:05 UTCJul 25, 18:00 UTC2h 55m
2026-07-25 VJC767 HPH → PQC Jul 25, 09:50 UTCJul 25, 10:05 UTC15m
2026-07-25 VJC766 PQC → HPH Jul 25, 08:35 UTCJul 25, 08:50 UTC15m
2026-07-23 VJC919 PUS → CXR Jul 23, 02:25 UTCJul 23, 09:20 UTC6h 55m
2026-07-23 VJC918 CXR → PUS Jul 23, 00:55 UTCJul 23, 01:15 UTC20m
2026-07-22 VJC918 CXR → PUS Jul 22, 11:15 UTCJul 22, 23:45 UTC12h 30m
2026-07-22 VJC5069 - Jul 22, 00:05 UTCJul 22, 00:20 UTC15m
2026-07-21 VJC5069 - Jul 21, 17:40 UTCJul 21, 17:55 UTC15m
2026-07-21 VJC5068 - Jul 21, 15:50 UTCJul 21, 16:15 UTC25m
2026-07-21 VJC5068 - Jul 21, 09:05 UTCJul 21, 09:20 UTC15m
2026-07-21 VJC919 - Jul 21, 02:25 UTCJul 21, 05:05 UTC2h 40m
2026-07-21 VJC919 - Jul 21, 00:45 UTCJul 21, 01:15 UTC30m
2026-07-20 VJC918 - Jul 20, 10:45 UTCJul 20, 23:30 UTC12h 45m
2026-07-20 VJC7615 - Jul 20, 03:10 UTCJul 20, 03:25 UTC15m
2026-07-19 VJC7615 - Jul 19, 16:50 UTCJul 20, 02:05 UTC9h 15m
2026-07-19 VJC7614 - Jul 19, 14:05 UTCJul 19, 14:15 UTC10m
2026-07-19 VJC7614 - Jul 19, 11:50 UTCJul 19, 12:05 UTC15m
2026-07-19 VJC7621 - Jul 19, 02:10 UTCJul 19, 02:25 UTC15m
2026-07-18 VJC7621 - Jul 18, 19:35 UTCJul 18, 19:45 UTC10m
2026-07-18 VJC7620 - Jul 18, 14:20 UTCJul 18, 14:40 UTC20m
2026-07-18 VJC7620 - Jul 18, 09:05 UTCJul 18, 09:15 UTC10m
2026-07-18 VJC7620 - Jul 18, 07:40 UTCJul 18, 07:55 UTC15m
2026-07-18 VJC5069 - Jul 18, 00:04 UTCJul 18, 00:19 UTC15m
2026-07-17 VJC5069 - Jul 17, 17:55 UTCJul 17, 18:10 UTC15m
2026-07-17 VJC5068 - Jul 17, 16:15 UTCJul 17, 16:34 UTC20m
2026-07-17 VJC5068 - Jul 17, 09:35 UTCJul 17, 09:45 UTC10m
2026-07-16 VJC279 - Jul 16, 10:04 UTCJul 16, 10:25 UTC20m
2026-07-16 VJC278 - Jul 16, 09:05 UTCJul 16, 09:15 UTC10m
2026-07-16 VJC7621 - Jul 16, 02:50 UTCJul 16, 03:00 UTC10m
2026-07-16 VJC7621 - Jul 16, 00:40 UTCJul 16, 00:50 UTC10m
2026-07-15 VJC7620 - Jul 15, 09:15 UTCJul 15, 19:40 UTC10h 25m
2026-07-15 VJC7620 - Jul 15, 07:40 UTCJul 15, 08:05 UTC25m
2026-07-15 VJC5069 - Jul 15, 01:00 UTCJul 15, 01:15 UTC15m
2026-07-14 VJC5069 - Jul 14, 18:30 UTCJul 14, 18:45 UTC15m
2026-07-14 VJC5068 - Jul 14, 16:40 UTCJul 14, 17:05 UTC25m
2026-07-14 VJC5068 - Jul 14, 09:55 UTCJul 14, 10:05 UTC10m
2026-07-13 VJC919 - Jul 13, 04:00 UTCJul 13, 15:15 UTC11h 15m
2026-07-13 VJC919 - Jul 13, 02:35 UTCJul 13, 02:55 UTC20m
2026-07-13 VJC919 - Jul 13, 00:55 UTCJul 13, 01:15 UTC20m
2026-07-12 VJC918 - Jul 12, 11:35 UTCJul 12, 23:45 UTC12h 10m
2026-07-12 VJC918 - Jul 12, 03:35 UTCJul 12, 23:45 UTC20h 10m
2026-07-12 VJC919 - Jul 12, 02:10 UTCJul 12, 23:45 UTC21h 35m
2026-07-12 VJC919 - Jul 12, 00:20 UTCJul 12, 00:40 UTC20m
2026-07-11 VJC918 - Jul 11, 22:01 UTCJul 11, 23:15 UTC1h 15m
2026-07-11 VJC733 - Jul 11, 13:15 UTCJul 11, 13:25 UTC10m

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-A549 page for operator, model, and routing details .

Mode-S 8881F4 frequently asked

What is Mode-S code 8881F4?
8881F4 is an ICAO 24-bit transponder address. Allocated to Vietnam. Assigned to VN-A549.
Where is Mode-S 8881F4 registered?
Mode-S code 8881F4 is allocated to Vietnam (VN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8881F4 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 23:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8881F4, octal 42100764, decimal 8,946,164.
What flights does 8881F4 operate?
Mode-S 8881F4 has broadcast 20 distinct callsigns, including VJC918, VJC7620, VJC5068, VJC919, VJC5069.