sensors Mode-S transponder
8881AB
ICAO 24-bit transponder address · allocated to Vietnam
Currently assigned to VN-A523 · AIRBUS A-321neo
- Hex
- 8881AB
- Octal
- 42100653
- Decimal
- 8,946,091
- Country
- VN
- Tail
- VN-A523
- Type
- A21N
- Flights observed
- 128
- Distinct callsigns
- 20
- Country
- VN
- Last broadcast
- 2h ago
Last known position
Country allocation
The ICAO 24-bit address 8881AB 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 |
|---|---|---|---|
| VJC933 | VietJet Air | 10 | 2026-04-24 |
| VJC822 | VietJet Air | 10 | 2026-05-26 |
| VJC820 | VietJet Air | 9 | 2026-05-28 |
| VJC91 | VietJet Air | 8 | 2026-05-28 |
| VJC823 | VietJet Air | 8 | 2026-05-27 |
| VJC92 | VietJet Air | 7 | 2026-05-28 |
| VJC883 | VietJet Air | 7 | 2026-05-14 |
| VJC821 | VietJet Air | 7 | 2026-05-29 |
| VJC947 | VietJet Air | 6 | 2026-04-20 |
| VJC932 | VietJet Air | 6 | 2026-04-23 |
| VJC1804 | VietJet Air | 5 | 2026-05-16 |
| VJC946 | VietJet Air | 4 | 2026-04-18 |
| VJC877 | VietJet Air | 4 | 2026-05-27 |
| VJC876 | VietJet Air | 4 | 2026-05-27 |
| VJC948 | - | 3 | 2026-04-13 |
| VJC934 | VietJet Air | 3 | 2026-04-22 |
| VJC884 | VietJet Air | 3 | 2026-05-14 |
| VJC935 | VietJet Air | 2 | 2026-04-22 |
| VJC885 | VietJet Air | 2 | 2026-04-29 |
| VJC826 | VietJet Air | 2 | 2026-05-03 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | VJC821 | HND → SGN | May 29, 17:40 UTC | May 30, 03:15 UTC | 9h 35m |
| 2026-05-28 | VJC820 | SGN → HND | May 28, 20:50 UTC | May 29, 15:35 UTC | 18h 45m |
| 2026-05-28 | VJC3948 | SGN → PKX | May 28, 13:35 UTC | May 29, 12:45 UTC | 23h 10m |
| 2026-05-28 | VJC3948 | SGN → PKX | May 28, 07:50 UTC | May 29, 03:00 UTC | 19h 10m |
| 2026-05-28 | VJC92 | PER → SGN | May 28, 02:55 UTC | May 28, 21:00 UTC | 18h 5m |
| 2026-05-28 | VJC91 | SGN → PER | May 28, 00:15 UTC | May 28, 00:45 UTC | 30m |
| 2026-05-27 | VJC877 | HKG → SGN | May 27, 13:30 UTC | May 27, 13:45 UTC | 15m |
| 2026-05-27 | VJC876 | SGN → HKG | May 27, 10:55 UTC | May 27, 11:15 UTC | 20m |
| 2026-05-27 | VJC823 | NRT → SGN | May 27, 00:14 UTC | May 27, 03:54 UTC | 3h 40m |
| 2026-05-26 | VJC822 | SGN → NRT | May 26, 07:40 UTC | May 26, 22:35 UTC | 14h 55m |
| 2026-05-25 | VJC803 | SGN → BKK | May 25, 15:35 UTC | May 26, 06:20 UTC | 14h 45m |
| 2026-05-24 | VJC92 | PER → SGN | May 24, 03:00 UTC | May 24, 07:30 UTC | 4h 30m |
| 2026-05-24 | VJC91 | SGN → PER | May 24, 00:40 UTC | May 24, 01:20 UTC | 40m |
| 2026-05-23 | VJC91 | SGN → PER | May 23, 03:35 UTC | May 24, 01:20 UTC | 21h 46m |
| 2026-05-23 | VJC823 | NRT → SGN | May 23, 00:50 UTC | May 24, 00:45 UTC | 23h 55m |
| 2026-05-23 | VJC823 | NRT → SGN | May 23, 00:30 UTC | May 23, 04:20 UTC | 3h 49m |
| 2026-05-22 | VJC822 | SGN → NRT | May 22, 03:00 UTC | May 22, 22:25 UTC | 19h 25m |
| 2026-05-21 | VJC862 | SGN → ICN | May 21, 11:35 UTC | May 22, 00:55 UTC | 13h 20m |
| 2026-05-20 | VJC869 | PUS → SGN | May 20, 19:55 UTC | May 21, 10:00 UTC | 14h 5m |
| 2026-05-20 | VJC877 | HKG → SGN | May 20, 12:20 UTC | May 20, 12:35 UTC | 15m |
| 2026-05-20 | VJC876 | SGN → HKG | May 20, 10:35 UTC | May 20, 10:45 UTC | 10m |
| 2026-05-20 | VJC823 | NRT → SGN | May 20, 00:10 UTC | May 20, 03:55 UTC | 3h 45m |
| 2026-05-19 | VJC822 | SGN → NRT | May 19, 18:55 UTC | May 19, 22:30 UTC | 3h 35m |
| 2026-05-19 | VJC822 | SGN → NRT | May 19, 01:00 UTC | May 19, 22:30 UTC | 21h 30m |
| 2026-05-18 | VJC868 | SGN → PUS | May 18, 19:30 UTC | May 19, 02:10 UTC | 6h 40m |
| 2026-05-18 | VJC877 | HKG → SGN | May 18, 12:15 UTC | May 18, 12:30 UTC | 15m |
| 2026-05-18 | VJC876 | SGN → HKG | May 18, 10:30 UTC | May 18, 10:35 UTC | 5m |
| 2026-05-17 | VJC821 | HND → SGN | May 17, 17:25 UTC | May 17, 20:50 UTC | 3h 25m |
| 2026-05-17 | VJC820 | SGN → HND | May 17, 15:20 UTC | May 17, 15:55 UTC | 35m |
| 2026-05-16 | VJC1804 | HYD → SGN | May 16, 18:55 UTC | May 17, 14:10 UTC | 19h 15m |
| 2026-05-16 | VJC1804 | HYD → SGN | May 16, 14:51 UTC | May 17, 14:10 UTC | 23h 20m |
| 2026-05-16 | VJC1804 | HYD → SGN | May 16, 13:46 UTC | May 17, 12:45 UTC | 23h 0m |
| 2026-05-16 | VJC1804 | HYD → SGN | May 16, 03:30 UTC | May 17, 02:45 UTC | 23h 15m |
| 2026-05-16 | VJC1804 | HYD → SGN | May 16, 00:50 UTC | May 16, 21:55 UTC | 21h 5m |
| 2026-05-16 | VJC823 | NRT → SGN | May 16, 00:20 UTC | May 16, 21:55 UTC | 21h 36m |
| 2026-05-15 | VJC822 | SGN → NRT | May 15, 19:15 UTC | May 15, 22:40 UTC | 3h 25m |
| 2026-05-14 | VJC822 | SGN → NRT | May 14, 23:10 UTC | May 15, 22:40 UTC | 23h 29m |
| 2026-05-14 | VJC884 | BOM → SGN | May 14, 21:30 UTC | May 15, 20:45 UTC | 23h 14m |
| 2026-05-14 | VJC883 | SGN → BOM | May 14, 08:25 UTC | May 15, 00:25 UTC | 16h 0m |
| 2026-05-13 | VJC883 | SGN → BOM | May 13, 20:50 UTC | May 14, 16:45 UTC | 19h 55m |
| 2026-05-13 | VJC883 | SGN → BOM | May 13, 19:00 UTC | May 14, 16:45 UTC | 21h 45m |
| 2026-05-13 | VJC821 | HND → SGN | May 13, 17:00 UTC | May 14, 16:45 UTC | 23h 45m |
| 2026-05-13 | VJC820 | SGN → HND | May 13, 11:55 UTC | May 13, 15:20 UTC | 3h 25m |
| 2026-05-11 | VJC92 | PER → SGN | May 11, 03:00 UTC | May 11, 08:10 UTC | 5h 10m |
| 2026-05-10 | VJC91 | SGN → PER | May 10, 07:55 UTC | May 11, 00:54 UTC | 17h 0m |
| 2026-05-10 | VJC92 | PER → SGN | May 10, 03:20 UTC | May 11, 00:54 UTC | 21h 35m |
| 2026-05-09 | VJC91 | SGN → PER | May 9, 21:00 UTC | May 10, 00:55 UTC | 3h 55m |
| 2026-05-09 | VJC91 | SGN → PER | May 9, 02:50 UTC | May 10, 00:55 UTC | 22h 5m |
| 2026-05-09 | VJC829 | KIX → SGN | May 9, 01:05 UTC | May 10, 00:45 UTC | 23h 40m |
| 2026-05-08 | VJC828 | SGN → KIX | May 8, 06:50 UTC | May 8, 23:20 UTC | 16h 30m |
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-A523 page for operator, model, and routing details .