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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
No current signal · last broadcast Jul 26, 22:25 UTC
Flights observed
242
Distinct callsigns
20
Country
TH
Last broadcast
Jul 26, 22:25 UTC

Last known position

Most recent position reported by Mode-S 88517A.

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
THA930 - 17 2026-07-16
THA931 - 16 2026-07-17
THA971 Thai Airways International 15 2026-07-26
THA970 Thai Airways International 14 2026-07-25
THA638 - 12 2026-07-13
THA639 - 11 2026-07-13
THA920 Thai Airways International 10 2026-07-23
THA633 Thai Airways International 10 2026-07-25
THA922 - 9 2026-07-12
THA683 Thai Airways International 9 2026-07-21
THA673 - 9 2026-06-29
THA632 Thai Airways International 9 2026-07-25
THA600 - 9 2026-07-10
THA923 - 8 2026-07-12
THA682 - 8 2026-07-20
THA601 - 8 2026-07-10
THA917 - 7 2026-07-15
THA916 - 7 2026-07-15
THA951 - 6 2026-07-11
THA950 - 6 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 THA971 ZRH → BKK Jul 26, 12:00 UTCJul 26, 22:25 UTC10h 25m
2026-07-25 THA970 BKK → ZRH Jul 25, 18:35 UTCJul 25, 22:15 UTC3h 40m
2026-07-25 THA633 TPE → BKK Jul 25, 07:25 UTCJul 25, 11:30 UTC4h 5m
2026-07-25 THA632 BKK → TPE Jul 25, 01:55 UTCJul 25, 05:35 UTC3h 40m
2026-07-24 THA921 FRA → BKK Jul 24, 13:15 UTCJul 24, 23:20 UTC10h 5m
2026-07-23 THA920 BKK → FRA Jul 23, 17:35 UTCJul 24, 04:40 UTC11h 5m
2026-07-23 THA633 TPE → BKK Jul 23, 06:20 UTCJul 23, 09:55 UTC3h 35m
2026-07-23 THA632 BKK → TPE Jul 23, 01:45 UTCJul 23, 05:05 UTC3h 20m
2026-07-22 THA971 ZRH → BKK Jul 22, 12:15 UTCJul 22, 22:05 UTC9h 50m
2026-07-21 THA970 BKK → ZRH Jul 21, 18:25 UTCJul 22, 05:25 UTC11h 0m
2026-07-21 THA683 HND → BKK Jul 21, 02:35 UTCJul 21, 08:20 UTC5h 45m
2026-07-20 THA682 - Jul 20, 16:10 UTCJul 20, 21:45 UTC5h 35m
2026-07-20 THA683 HND → BKK Jul 20, 07:10 UTCJul 20, 07:35 UTC25m
2026-07-20 THA683 HND → BKK Jul 20, 01:55 UTCJul 20, 05:00 UTC3h 5m
2026-07-19 THA682 - Jul 19, 16:05 UTCJul 19, 21:45 UTC5h 40m
2026-07-19 THA623 KIX → BKK Jul 19, 08:05 UTCJul 19, 08:15 UTC10m
2026-07-19 THA623 KIX → BKK Jul 19, 03:15 UTCJul 19, 06:05 UTC2h 50m
2026-07-18 THA622 - Jul 18, 19:50 UTCJul 18, 22:45 UTC2h 55m
2026-07-18 THA622 - Jul 18, 17:40 UTCJul 18, 17:50 UTC10m
2026-07-18 THA633 - Jul 18, 07:25 UTCJul 18, 07:55 UTC30m
2026-07-18 THA632 - Jul 18, 04:10 UTCJul 18, 05:30 UTC1h 20m
2026-07-18 THA632 - Jul 18, 02:00 UTCJul 18, 02:09 UTC10m
2026-07-17 THA931 - Jul 17, 12:40 UTCJul 17, 23:39 UTC11h 0m
2026-07-16 THA930 - Jul 16, 18:15 UTCJul 17, 05:45 UTC11h 30m
2026-07-15 THA917 - Jul 15, 21:10 UTCJul 16, 08:40 UTC11h 30m
2026-07-15 THA916 - Jul 15, 06:10 UTCJul 15, 18:00 UTC11h 50m
2026-07-14 THA921 - Jul 14, 13:05 UTCJul 14, 23:20 UTC10h 14m
2026-07-13 THA920 - Jul 13, 17:10 UTCJul 14, 04:15 UTC11h 5m
2026-07-13 THA639 - Jul 13, 13:20 UTCJul 13, 13:40 UTC20m
2026-07-13 THA639 - Jul 13, 11:20 UTCJul 13, 11:35 UTC15m
2026-07-13 THA638 - Jul 13, 09:45 UTCJul 13, 09:50 UTC5m
2026-07-13 THA638 - Jul 13, 07:25 UTCJul 13, 07:40 UTC15m
2026-07-12 THA923 - Jul 12, 19:15 UTCJul 13, 04:50 UTC9h 35m
2026-07-12 THA922 - Jul 12, 05:55 UTCJul 12, 17:10 UTC11h 15m
2026-07-11 THA951 - Jul 11, 13:15 UTCJul 11, 22:50 UTC9h 35m
2026-07-10 THA950 - Jul 10, 18:40 UTCJul 11, 06:05 UTC11h 25m
2026-07-10 THA410 - Jul 10, 13:30 UTCJul 10, 15:25 UTC1h 55m
2026-07-10 THA409 - Jul 10, 09:45 UTCJul 10, 11:40 UTC1h 55m
2026-07-10 THA601 - Jul 10, 07:00 UTCJul 10, 07:40 UTC40m
2026-07-10 THA601 - Jul 10, 05:20 UTCJul 10, 05:30 UTC10m
2026-07-10 THA600 - Jul 10, 03:30 UTCJul 10, 03:35 UTC5m
2026-07-10 THA600 - Jul 10, 01:20 UTCJul 10, 01:45 UTC25m
2026-07-09 THA346 - Jul 9, 19:25 UTCJul 9, 23:15 UTC3h 50m
2026-07-09 THA345 BKK → LHE Jul 9, 13:10 UTCJul 9, 17:10 UTC4h 0m
2026-07-09 THA633 - Jul 9, 07:00 UTCJul 9, 10:15 UTC3h 15m
2026-07-09 THA632 BKK → TPE Jul 9, 01:45 UTCJul 9, 05:15 UTC3h 30m
2026-07-08 THA931 - Jul 8, 12:10 UTCJul 8, 22:45 UTC10h 35m
2026-07-07 THA930 - Jul 7, 17:35 UTCJul 8, 05:20 UTC11h 45m
2026-07-06 THA951 - Jul 6, 12:45 UTCJul 6, 22:50 UTC10h 5m
2026-07-05 THA950 - Jul 5, 18:35 UTCJul 6, 05:50 UTC11h 15m

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 .

Mode-S 88517A frequently asked

What is Mode-S code 88517A?
88517A is an ICAO 24-bit transponder address. Allocated to Thailand. Assigned to HS-TKZ.
Where is Mode-S 88517A registered?
Mode-S code 88517A is allocated to Thailand (TH). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 88517A broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 88517A, octal 42050572, decimal 8,933,754.
What flights does 88517A operate?
Mode-S 88517A has broadcast 20 distinct callsigns, including THA930, THA931, THA971, THA970, THA638.