sensors Mode-S transponder
88517A
ICAO 24-bit transponder address · allocated to Thailand
Currently assigned to HS-TKZ · BOEING 777-300ER
- Hex
- 88517A
- Octal
- 42050572
- Decimal
- 8,933,754
- Country
- TH
- Tail
- HS-TKZ
- Type
- B77W
- Flights observed
- 116
- Distinct callsigns
- 20
- Country
- TH
- Last broadcast
- 2h ago
Last known position
Country allocation
The ICAO 24-bit address 88517A falls within the block assigned to Thailand (TH) by ICAO Annex 10, Volume III. Every aircraft registered in Thailand 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 |
|---|---|---|---|
| THA931 | Thai Airways International | 10 | 2026-05-28 |
| THA930 | Thai Airways International | 10 | 2026-05-27 |
| THA971 | Thai Airways International | 9 | 2026-05-21 |
| THA970 | Thai Airways International | 8 | 2026-05-20 |
| THA638 | Thai Airways International | 8 | 2026-05-29 |
| THA920 | Thai Airways International | 7 | 2026-04-24 |
| THA639 | Thai Airways International | 7 | 2026-05-29 |
| THA673 | Thai Airways International | 6 | 2026-05-15 |
| THA923 | Thai Airways International | 5 | 2026-05-23 |
| THA922 | Thai Airways International | 5 | 2026-05-23 |
| THA917 | Thai Airways International | 4 | 2026-05-13 |
| THA916 | Thai Airways International | 4 | 2026-05-13 |
| THA633 | Thai Airways International | 4 | 2026-05-19 |
| THA600 | Thai Airways International | 4 | 2026-05-26 |
| THA921 | Thai Airways International | 3 | 2026-04-25 |
| THA632 | Thai Airways International | 3 | 2026-05-19 |
| THA601 | Thai Airways International | 3 | 2026-05-26 |
| THA683 | Thai Airways International | 2 | 2026-05-30 |
| THA682 | Thai Airways International | 2 | 2026-05-29 |
| THA672 | Thai Airways International | 2 | 2026-05-15 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-30 | THA683 | HND → BKK | May 30, 02:06 UTC | May 30, 02:55 UTC | 49m |
| 2026-05-29 | THA682 | BKK → HND | May 29, 16:10 UTC | May 29, 21:25 UTC | 5h 15m |
| 2026-05-29 | THA639 | HKG → BKK | May 29, 11:35 UTC | May 29, 14:00 UTC | 2h 25m |
| 2026-05-29 | THA638 | BKK → HKG | May 29, 09:25 UTC | May 29, 09:45 UTC | 20m |
| 2026-05-29 | THA638 | BKK → HKG | May 29, 07:20 UTC | May 29, 08:50 UTC | 1h 30m |
| 2026-05-28 | THA931 | CDG → BKK | May 28, 12:25 UTC | May 28, 23:00 UTC | 10h 35m |
| 2026-05-27 | THA930 | BKK → CDG | May 27, 17:30 UTC | May 28, 05:35 UTC | 12h 5m |
| 2026-05-26 | THA316 | DEL → BKK | May 26, 18:24 UTC | May 26, 21:59 UTC | 3h 35m |
| 2026-05-26 | THA315 | BKK → DEL | May 26, 12:05 UTC | May 26, 15:45 UTC | 3h 40m |
| 2026-05-26 | THA601 | HKG → BKK | May 26, 06:49 UTC | May 26, 07:40 UTC | 50m |
| 2026-05-26 | THA601 | HKG → BKK | May 26, 05:15 UTC | May 26, 05:25 UTC | 10m |
| 2026-05-26 | THA600 | BKK → HKG | May 26, 03:19 UTC | May 26, 03:40 UTC | 20m |
| 2026-05-26 | THA600 | BKK → HKG | May 26, 01:20 UTC | May 26, 01:55 UTC | 35m |
| 2026-05-25 | THA683 | HND → BKK | May 25, 02:05 UTC | May 25, 07:35 UTC | 5h 30m |
| 2026-05-24 | THA682 | BKK → HND | May 24, 16:35 UTC | May 24, 21:50 UTC | 5h 15m |
| 2026-05-24 | THA639 | HKG → BKK | May 24, 13:10 UTC | May 24, 13:55 UTC | 45m |
| 2026-05-24 | THA639 | HKG → BKK | May 24, 11:40 UTC | May 24, 11:50 UTC | 10m |
| 2026-05-24 | THA638 | BKK → HKG | May 24, 09:30 UTC | May 24, 09:50 UTC | 20m |
| 2026-05-24 | THA638 | BKK → HKG | May 24, 07:30 UTC | May 24, 08:05 UTC | 35m |
| 2026-05-23 | THA923 | FRA → BKK | May 23, 19:30 UTC | May 24, 05:25 UTC | 9h 55m |
| 2026-05-23 | THA922 | BKK → FRA | May 23, 05:40 UTC | May 23, 17:00 UTC | 11h 20m |
| 2026-05-22 | THA639 | HKG → BKK | May 22, 13:15 UTC | May 22, 14:00 UTC | 45m |
| 2026-05-22 | THA639 | HKG → BKK | May 22, 11:40 UTC | May 22, 11:50 UTC | 10m |
| 2026-05-22 | THA638 | BKK → HKG | May 22, 09:20 UTC | May 22, 09:45 UTC | 25m |
| 2026-05-22 | THA638 | BKK → HKG | May 22, 07:20 UTC | May 22, 07:55 UTC | 35m |
| 2026-05-21 | THA971 | ZRH → BKK | May 21, 12:30 UTC | May 21, 23:20 UTC | 10h 50m |
| 2026-05-20 | THA970 | BKK → ZRH | May 20, 18:30 UTC | May 21, 05:15 UTC | 10h 45m |
| 2026-05-19 | THA633 | TPE → BKK | May 19, 06:40 UTC | May 19, 10:00 UTC | 3h 20m |
| 2026-05-19 | THA632 | BKK → TPE | May 19, 01:55 UTC | May 19, 05:15 UTC | 3h 20m |
| 2026-05-18 | THA971 | ZRH → BKK | May 18, 11:45 UTC | May 18, 21:55 UTC | 10h 9m |
| 2026-05-17 | THA970 | BKK → ZRH | May 17, 18:15 UTC | May 18, 05:45 UTC | 11h 30m |
| 2026-05-16 | THA971 | ZRH → BKK | May 16, 12:01 UTC | May 16, 22:05 UTC | 10h 4m |
| 2026-05-15 | THA970 | BKK → ZRH | May 15, 18:30 UTC | May 16, 05:46 UTC | 11h 16m |
| 2026-05-15 | THA673 | KIX → BKK | May 15, 08:50 UTC | May 15, 14:10 UTC | 5h 20m |
| 2026-05-15 | THA672 | BKK → KIX | May 15, 01:55 UTC | May 15, 06:55 UTC | 5h 0m |
| 2026-05-13 | THA917 | LHR → BKK | May 13, 21:50 UTC | May 14, 08:35 UTC | 10h 45m |
| 2026-05-13 | THA916 | BKK → LHR | May 13, 05:55 UTC | May 13, 18:20 UTC | 12h 25m |
| 2026-05-12 | THA931 | CDG → BKK | May 12, 11:40 UTC | May 12, 21:40 UTC | 10h 0m |
| 2026-05-11 | THA930 | BKK → CDG | May 11, 17:20 UTC | May 12, 05:15 UTC | 11h 55m |
| 2026-05-10 | THA917 | LHR → BKK | May 10, 20:40 UTC | May 10, 23:35 UTC | 2h 55m |
| 2026-05-10 | THA916 | BKK → LHR | May 10, 05:55 UTC | May 10, 14:25 UTC | 8h 30m |
| 2026-05-09 | THA931 | CDG → BKK | May 9, 11:50 UTC | May 9, 22:25 UTC | 10h 35m |
| 2026-05-08 | THA930 | BKK → CDG | May 8, 18:55 UTC | May 9, 05:25 UTC | 10h 30m |
| 2026-05-08 | THA930 | BKK → CDG | May 8, 17:35 UTC | May 8, 17:50 UTC | 15m |
| 2026-05-07 | THA923 | FRA → BKK | May 7, 19:25 UTC | May 8, 05:24 UTC | 10h 0m |
| 2026-05-07 | THA922 | BKK → FRA | May 7, 05:50 UTC | May 7, 17:05 UTC | 11h 15m |
| 2026-05-06 | THA931 | CDG → BKK | May 6, 21:10 UTC | May 6, 22:20 UTC | 1h 10m |
| 2026-05-06 | THA931 | CDG → BKK | May 6, 11:50 UTC | May 6, 20:55 UTC | 9h 4m |
| 2026-05-05 | THA930 | BKK → CDG | May 5, 17:25 UTC | May 5, 21:15 UTC | 3h 50m |
| 2026-05-04 | THA623 | KIX → BKK | May 4, 18:10 UTC | May 5, 09:15 UTC | 15h 6m |
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 HS-TKZ page for operator, model, and routing details .