Apparatus

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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 53m ago
Flights observed
216
Distinct callsigns
20
Country
TH
Last broadcast
53m ago

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 - 16 2026-07-07
THA931 - 15 2026-07-08
THA971 - 13 2026-06-28
THA970 - 12 2026-06-27
THA638 - 12 2026-07-13
THA639 - 11 2026-07-13
THA922 - 9 2026-07-12
THA920 - 9 2026-07-13
THA673 - 9 2026-06-29
THA600 - 9 2026-07-10
THA923 - 8 2026-07-12
THA601 - 8 2026-07-10
THA633 - 7 2026-07-09
THA951 - 6 2026-07-11
THA950 - 6 2026-07-10
THA917 - 6 2026-07-04
THA916 - 6 2026-07-04
THA683 - 6 2026-06-24
THA682 - 6 2026-06-23
THA921 - 5 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 THA921 - Jul 14, 13:05 UTCJul 14, 16:30 UTC3h 25m
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
2026-07-04 THA917 - Jul 4, 20:50 UTCJul 5, 07:35 UTC10h 45m
2026-07-04 THA916 - Jul 4, 06:20 UTCJul 4, 07:35 UTC1h 15m
2026-07-03 THA931 - Jul 3, 12:10 UTCJul 3, 22:50 UTC10h 40m
2026-07-02 THA930 - Jul 2, 19:15 UTCJul 3, 05:15 UTC10h 0m
2026-07-02 THA930 - Jul 2, 17:35 UTCJul 2, 18:40 UTC1h 5m
2026-07-02 THA677 NRT → BKK Jul 2, 08:40 UTCJul 2, 14:35 UTC5h 55m
2026-07-02 THA676 - Jul 2, 03:25 UTCJul 2, 07:00 UTC3h 35m
2026-07-01 THA316 - Jul 1, 18:30 UTCJul 1, 22:00 UTC3h 30m
2026-07-01 THA315 - Jul 1, 12:25 UTCJul 1, 16:05 UTC3h 40m
2026-07-01 THA633 - Jul 1, 09:45 UTCJul 1, 10:05 UTC20m
2026-07-01 THA633 - Jul 1, 07:00 UTCJul 1, 07:25 UTC25m
2026-07-01 THA632 - Jul 1, 01:50 UTCJul 1, 05:10 UTC3h 20m
2026-06-30 THA931 - Jun 30, 12:15 UTCJun 30, 22:50 UTC10h 35m
2026-06-29 THA930 - Jun 29, 17:34 UTCJun 30, 01:45 UTC8h 11m
2026-06-29 THA673 KIX → BKK Jun 29, 08:54 UTCJun 29, 14:09 UTC5h 15m
2026-06-29 THA672 - Jun 29, 01:50 UTCJun 29, 07:09 UTC5h 20m
2026-06-28 THA971 ZRH → BKK Jun 28, 11:59 UTCJun 28, 22:15 UTC10h 15m
2026-06-27 THA970 - Jun 27, 18:29 UTCJun 27, 22:09 UTC3h 40m
2026-06-27 THA436 - Jun 27, 12:29 UTCJun 27, 15:24 UTC2h 55m
2026-06-27 THA435 - Jun 27, 10:34 UTCJun 27, 10:50 UTC15m
2026-06-27 THA435 - Jun 27, 07:55 UTCJun 27, 09:55 UTC2h 0m
2026-06-26 THA923 - Jun 26, 19:39 UTCJun 27, 05:44 UTC10h 5m
2026-06-26 THA922 - Jun 26, 14:29 UTCJun 26, 16:35 UTC2h 5m
2026-06-26 THA922 - Jun 26, 05:44 UTCJun 26, 06:04 UTC20m
2026-06-25 THA951 - Jun 25, 12:54 UTCJun 25, 22:59 UTC10h 5m
2026-06-24 THA950 - Jun 24, 18:55 UTCJun 25, 06:05 UTC11h 10m

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 53m ago.
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.