sensors Mode-S transponder
88516C
ICAO 24-bit transponder address · allocated to Thailand
Currently assigned to HS-TKL · BOEING 777-300ER
- Hex
- 88516C
- Octal
- 42050554
- Decimal
- 8,933,740
- Country
- TH
- Tail
- HS-TKL
- Type
- B77W
- Flights observed
- 119
- Distinct callsigns
- 20
- Country
- TH
- Last broadcast
- 4h ago
Last known position
Country allocation
The ICAO 24-bit address 88516C 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 |
|---|---|---|---|
| THA923 | Thai Airways International | 10 | 2026-05-19 |
| THA917 | Thai Airways International | 10 | 2026-05-28 |
| THA951 | Thai Airways International | 9 | 2026-05-22 |
| THA950 | Thai Airways International | 9 | 2026-05-29 |
| THA922 | Thai Airways International | 9 | 2026-05-19 |
| THA601 | Thai Airways International | 7 | 2026-05-25 |
| THA600 | Thai Airways International | 7 | 2026-05-25 |
| THA916 | Thai Airways International | 6 | 2026-05-28 |
| THA638 | Thai Airways International | 6 | 2026-04-30 |
| THA315 | Thai Airways International | 6 | 2026-05-25 |
| THA639 | Thai Airways International | 5 | 2026-04-30 |
| THA316 | Thai Airways International | 5 | 2026-05-25 |
| THA971 | Thai Airways International | 4 | 2026-05-08 |
| THA970 | Thai Airways International | 4 | 2026-05-07 |
| THA682 | Thai Airways International | 4 | 2026-05-26 |
| THA683 | Thai Airways International | 3 | 2026-05-27 |
| THA673 | Thai Airways International | 3 | 2026-05-04 |
| THA672 | Thai Airways International | 3 | 2026-04-13 |
| THA931 | Thai Airways International | 2 | 2026-05-01 |
| THA921 | Thai Airways International | 2 | 2026-05-16 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | THA950 | BKK → CPH | May 29, 18:20 UTC | May 29, 22:05 UTC | 3h 45m |
| 2026-05-28 | THA917 | LHR → BKK | May 28, 20:40 UTC | May 29, 07:05 UTC | 10h 25m |
| 2026-05-28 | THA916 | BKK → LHR | May 28, 06:10 UTC | May 28, 14:55 UTC | 8h 45m |
| 2026-05-27 | THA683 | HND → BKK | May 27, 01:54 UTC | May 27, 07:30 UTC | 5h 36m |
| 2026-05-26 | THA682 | BKK → HND | May 26, 16:05 UTC | May 26, 21:40 UTC | 5h 35m |
| 2026-05-25 | THA316 | DEL → BKK | May 25, 18:25 UTC | May 25, 21:49 UTC | 3h 25m |
| 2026-05-25 | THA315 | BKK → DEL | May 25, 12:20 UTC | May 25, 15:55 UTC | 3h 35m |
| 2026-05-25 | THA601 | HKG → BKK | May 25, 07:00 UTC | May 25, 07:40 UTC | 40m |
| 2026-05-25 | THA601 | HKG → BKK | May 25, 05:25 UTC | May 25, 05:40 UTC | 15m |
| 2026-05-25 | THA600 | BKK → HKG | May 25, 03:20 UTC | May 25, 03:35 UTC | 15m |
| 2026-05-24 | THA316 | DEL → BKK | May 24, 18:55 UTC | May 24, 21:45 UTC | 2h 50m |
| 2026-05-24 | THA315 | BKK → DEL | May 24, 12:25 UTC | May 24, 13:30 UTC | 1h 5m |
| 2026-05-23 | THA917 | LHR → BKK | May 23, 20:40 UTC | May 24, 07:45 UTC | 11h 5m |
| 2026-05-23 | THA916 | BKK → LHR | May 23, 05:55 UTC | May 23, 18:05 UTC | 12h 10m |
| 2026-05-22 | THA951 | CPH → BKK | May 22, 12:40 UTC | May 22, 23:00 UTC | 10h 20m |
| 2026-05-21 | THA950 | BKK → CPH | May 21, 18:15 UTC | May 21, 19:15 UTC | 1h 0m |
| 2026-05-19 | THA923 | FRA → BKK | May 19, 19:15 UTC | May 20, 05:35 UTC | 10h 21m |
| 2026-05-19 | THA922 | BKK → FRA | May 19, 05:45 UTC | May 19, 16:55 UTC | 11h 10m |
| 2026-05-17 | THA917 | LHR → BKK | May 17, 20:35 UTC | May 18, 07:55 UTC | 11h 20m |
| 2026-05-17 | THA916 | BKK → LHR | May 17, 06:00 UTC | May 17, 18:01 UTC | 12h 0m |
| 2026-05-16 | THA921 | FRA → BKK | May 16, 13:05 UTC | May 16, 23:20 UTC | 10h 14m |
| 2026-05-15 | THA920 | BKK → FRA | May 15, 17:05 UTC | May 16, 04:05 UTC | 11h 0m |
| 2026-05-15 | THA623 | KIX → BKK | May 15, 03:20 UTC | May 15, 08:35 UTC | 5h 15m |
| 2026-05-14 | THA622 | BKK → KIX | May 14, 17:15 UTC | May 14, 22:10 UTC | 4h 55m |
| 2026-05-13 | THA923 | FRA → BKK | May 13, 19:25 UTC | May 14, 05:35 UTC | 10h 10m |
| 2026-05-13 | THA922 | BKK → FRA | May 13, 05:55 UTC | May 13, 06:10 UTC | 15m |
| 2026-05-12 | THA951 | CPH → BKK | May 12, 12:45 UTC | May 12, 23:01 UTC | 10h 15m |
| 2026-05-11 | THA950 | BKK → CPH | May 11, 18:50 UTC | May 12, 06:10 UTC | 11h 20m |
| 2026-05-09 | THA917 | LHR → BKK | May 9, 20:44 UTC | May 10, 07:40 UTC | 10h 55m |
| 2026-05-09 | THA916 | BKK → LHR | May 9, 06:05 UTC | May 9, 07:00 UTC | 55m |
| 2026-05-08 | THA971 | ZRH → BKK | May 8, 12:10 UTC | May 8, 22:00 UTC | 9h 50m |
| 2026-05-07 | THA970 | BKK → ZRH | May 7, 18:25 UTC | May 8, 05:54 UTC | 11h 29m |
| 2026-05-07 | THA683 | HND → BKK | May 7, 02:15 UTC | May 7, 08:25 UTC | 6h 10m |
| 2026-05-06 | THA682 | BKK → HND | May 6, 21:05 UTC | May 6, 21:35 UTC | 30m |
| 2026-05-06 | THA682 | BKK → HND | May 6, 16:15 UTC | May 6, 20:00 UTC | 3h 45m |
| 2026-05-05 | THA921 | FRA → BKK | May 5, 13:00 UTC | May 5, 23:15 UTC | 10h 15m |
| 2026-05-04 | THA920 | BKK → FRA | May 4, 17:45 UTC | May 5, 05:05 UTC | 11h 21m |
| 2026-05-04 | THA673 | KIX → BKK | May 4, 01:55 UTC | May 4, 14:35 UTC | 12h 40m |
| 2026-05-03 | THA971 | ZRH → BKK | May 3, 12:20 UTC | May 3, 22:30 UTC | 10h 10m |
| 2026-05-02 | THA970 | BKK → ZRH | May 2, 18:30 UTC | May 3, 05:50 UTC | 11h 19m |
| 2026-05-02 | THA601 | HKG → BKK | May 2, 05:25 UTC | May 2, 07:50 UTC | 2h 25m |
| 2026-05-02 | THA600 | BKK → HKG | May 2, 03:30 UTC | May 2, 03:40 UTC | 10m |
| 2026-05-02 | THA600 | BKK → HKG | May 2, 01:25 UTC | May 2, 02:00 UTC | 35m |
| 2026-05-01 | THA931 | CDG → BKK | May 1, 11:55 UTC | May 1, 19:40 UTC | 7h 45m |
| 2026-04-30 | THA930 | BKK → CDG | Apr 30, 17:35 UTC | Apr 30, 18:30 UTC | 55m |
| 2026-04-30 | THA639 | HKG → BKK | Apr 30, 11:45 UTC | Apr 30, 12:00 UTC | 15m |
| 2026-04-30 | THA638 | BKK → HKG | Apr 30, 09:55 UTC | Apr 30, 10:10 UTC | 15m |
| 2026-04-30 | THA638 | BKK → HKG | Apr 30, 07:50 UTC | Apr 30, 08:20 UTC | 30m |
| 2026-04-29 | THA923 | FRA → BKK | Apr 29, 19:45 UTC | Apr 30, 05:45 UTC | 9h 59m |
| 2026-04-29 | THA922 | BKK → FRA | Apr 29, 05:50 UTC | Apr 29, 17:20 UTC | 11h 31m |
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-TKL page for operator, model, and routing details .