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sensors Mode-S transponder

8881B1

ICAO 24-bit transponder address · allocated to Vietnam

Currently assigned to VN-A535 · AIRBUS A-321

Hex
8881B1
Octal
42100661
Decimal
8,946,097
Country
VN
Tail
VN-A535
Type
A321
No current signal · last broadcast Jul 25, 01:35 UTC
Flights observed
197
Distinct callsigns
20
Country
VN
Last broadcast
Jul 25, 01:35 UTC

Last known position

Most recent position reported by Mode-S 8881B1.

Country allocation

The ICAO 24-bit address 8881B1 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
VJC1802 - 10 2026-07-15
VJC901 - 9 2026-07-02
VJC1801 - 7 2026-07-15
VJC960 - 6 2026-07-14
VJC902 - 6 2026-07-02
VJC1925 - 6 2026-06-23
VJC885 VietJet Air 5 2026-07-23
VJC961 VietJet Air 4 2026-06-06
VJC947 - 4 2026-06-30
VJC929 VietJet Air 4 2026-05-02
VJC886 VietJet Air 4 2026-07-23
VJC1926 - 4 2026-06-23
VJC1804 - 4 2026-06-25
VJC970 - 3 2026-07-11
VJC946 - 3 2026-06-30
VJC931 VietJet Air 3 2026-04-17
VJC928 VietJet Air 3 2026-05-02
VJC466 - 3 2026-07-02
VJC144 - 3 2026-07-20
VJC988 VietJet Air 2 2026-06-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 VJC271 HPH → SGN Jul 25, 01:20 UTCJul 25, 01:35 UTC15m
2026-07-24 VJC280 SGN → HPH Jul 24, 11:45 UTCJul 24, 11:55 UTC10m
2026-07-23 VJC155 - Jul 23, 12:30 UTCJul 23, 12:45 UTC15m
2026-07-23 VJC148 SGN → HAN Jul 23, 11:00 UTCJul 23, 11:15 UTC15m
2026-07-23 VJC885 KHH → SGN Jul 23, 05:20 UTCJul 23, 06:00 UTC40m
2026-07-23 VJC886 SGN → KHH Jul 23, 03:05 UTCJul 23, 03:55 UTC50m
2026-07-22 VJC877 HKG → SGN Jul 22, 12:25 UTCJul 22, 12:40 UTC15m
2026-07-22 VJC869 PUS → SGN Jul 22, 01:25 UTCJul 22, 02:30 UTC1h 5m
2026-07-21 VJC869 PUS → SGN Jul 21, 23:50 UTCJul 22, 00:05 UTC15m
2026-07-21 VJC868 SGN → PUS Jul 21, 22:20 UTCJul 21, 22:45 UTC25m
2026-07-21 VJC868 SGN → PUS Jul 21, 05:45 UTCJul 21, 21:20 UTC15h 35m
2026-07-21 VJC825 SGN → KUL Jul 21, 04:00 UTCJul 21, 04:25 UTC25m
2026-07-20 VJC167 HAN → SGN Jul 20, 17:20 UTCJul 20, 17:35 UTC15m
2026-07-20 VJC519 HAN → DAD Jul 20, 13:05 UTCJul 20, 16:00 UTC2h 55m
2026-07-20 VJC144 - Jul 20, 11:25 UTCJul 20, 11:35 UTC10m
2026-07-20 VJC885 - Jul 20, 05:30 UTCJul 20, 06:15 UTC45m
2026-07-19 VJC886 SGN → KHH Jul 19, 14:15 UTCJul 20, 04:20 UTC14h 5m
2026-07-17 VJC885 - Jul 17, 04:49 UTCJul 17, 05:25 UTC35m
2026-07-16 VJC886 MNL → KHH Jul 16, 19:45 UTCJul 17, 03:45 UTC8h 0m
2026-07-16 VJC885 KHH → MNL Jul 16, 04:55 UTCJul 16, 18:00 UTC13h 5m
2026-07-15 VJC1802 - Jul 15, 20:05 UTCJul 16, 03:55 UTC7h 50m
2026-07-15 VJC1802 - Jul 15, 19:10 UTCJul 15, 19:25 UTC15m
2026-07-15 VJC1801 - Jul 15, 17:25 UTCJul 15, 17:45 UTC20m
2026-07-15 VJC863 - Jul 15, 03:35 UTCJul 15, 16:50 UTC13h 15m
2026-07-14 VJC960 - Jul 14, 22:35 UTCJul 14, 23:00 UTC24m
2026-07-14 VJC960 - Jul 14, 19:00 UTCJul 14, 19:10 UTC10m
2026-07-13 VJC1802 - Jul 13, 22:20 UTCJul 14, 17:35 UTC19h 15m
2026-07-13 VJC1802 - Jul 13, 20:20 UTCJul 14, 17:35 UTC21h 15m
2026-07-13 VJC1802 - Jul 13, 19:50 UTCJul 14, 17:35 UTC21h 45m
2026-07-13 VJC1802 - Jul 13, 19:00 UTCJul 13, 19:15 UTC15m
2026-07-13 VJC1801 - Jul 13, 17:25 UTCJul 13, 17:40 UTC15m
2026-07-13 VJC1801 - Jul 13, 14:10 UTCJul 13, 16:40 UTC2h 30m
2026-07-12 VJC890 - Jul 12, 11:25 UTCJul 12, 11:55 UTC30m
2026-07-12 VJC889 - Jul 12, 09:20 UTCJul 12, 10:05 UTC45m
2026-07-11 VJC529 HAN → DAD Jul 11, 16:00 UTCJul 11, 16:10 UTC10m
2026-07-11 VJC970 - Jul 11, 03:40 UTCJul 11, 04:05 UTC25m
2026-07-10 VJC813 - Jul 10, 13:20 UTCJul 11, 02:30 UTC13h 10m
2026-07-10 VJC885 - Jul 10, 05:00 UTCJul 10, 05:20 UTC20m
2026-07-09 VJC886 - Jul 9, 16:10 UTCJul 10, 03:50 UTC11h 40m
2026-07-09 VJC812 - Jul 9, 05:25 UTCJul 10, 03:50 UTC22h 25m
2026-07-08 VJC1806 - Jul 8, 14:30 UTCJul 9, 03:55 UTC13h 25m
2026-07-08 VJC135 - Jul 8, 03:40 UTCJul 8, 04:00 UTC20m
2026-07-08 VJC156 - Jul 8, 01:40 UTCJul 8, 02:00 UTC20m
2026-07-07 VJC731 - Jul 7, 06:20 UTCJul 7, 06:35 UTC15m
2026-07-07 VJC730 - Jul 7, 05:05 UTCJul 7, 05:20 UTC15m
2026-07-06 VJC787 - Jul 6, 09:20 UTCJul 6, 09:35 UTC15m
2026-07-06 VJC566 - Jul 6, 05:15 UTCJul 6, 07:45 UTC2h 30m
2026-07-03 VJC809 - Jul 3, 16:15 UTCJul 4, 05:45 UTC13h 30m
2026-07-03 VJC419 - Jul 3, 08:50 UTCJul 3, 12:15 UTC3h 25m
2026-07-03 VJC494 BMV → HAN Jul 3, 04:05 UTCJul 3, 07:45 UTC3h 40m

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-A535 page for operator, model, and routing details .

Mode-S 8881B1 frequently asked

What is Mode-S code 8881B1?
8881B1 is an ICAO 24-bit transponder address. Allocated to Vietnam. Assigned to VN-A535.
Where is Mode-S 8881B1 registered?
Mode-S code 8881B1 is allocated to Vietnam (VN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8881B1 broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 01:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8881B1, octal 42100661, decimal 8,946,097.
What flights does 8881B1 operate?
Mode-S 8881B1 has broadcast 20 distinct callsigns, including VJC1802, VJC901, VJC1801, VJC960, VJC902.