Apparatus

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sensors Mode-S transponder

885171

ICAO 24-bit transponder address · allocated to Thailand

Currently assigned to HS-TKQ · BOEING 777-300ER

Hex
885171
Octal
42050561
Decimal
8,933,745
Country
TH
Tail
HS-TKQ
Type
B77W
No current signal · last broadcast 9h ago
Flights observed
206
Distinct callsigns
20
Country
TH
Last broadcast
9h ago

Last known position

Most recent position reported by Mode-S 885171.

Country allocation

The ICAO 24-bit address 885171 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
THA922 - 15 2026-07-09
THA971 - 14 2026-06-27
THA683 - 14 2026-07-07
THA682 - 14 2026-07-06
THA923 - 13 2026-07-09
THA600 - 13 2026-06-25
THA638 - 12 2026-07-10
THA601 - 11 2026-06-25
THA970 - 10 2026-06-26
THA639 - 10 2026-07-10
THA951 - 9 2026-07-13
THA950 - 9 2026-07-12
THA921 - 7 2026-07-11
THA920 - 6 2026-07-10
THA931 - 5 2026-06-20
THA930 - 5 2026-06-19
THA917 - 5 2026-07-05
THA916 - 5 2026-07-05
THA673 Thai Airways International 4 2026-06-07
THA672 Thai Airways International 4 2026-06-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 THA951 - Jul 13, 12:50 UTCJul 13, 23:10 UTC10h 20m
2026-07-12 THA950 - Jul 12, 18:30 UTCJul 13, 05:25 UTC10h 55m
2026-07-12 THA635 - Jul 12, 14:01 UTCJul 12, 14:15 UTC15m
2026-07-12 THA635 - Jul 12, 11:05 UTCJul 12, 11:50 UTC45m
2026-07-12 THA634 - Jul 12, 08:25 UTCJul 12, 09:35 UTC1h 10m
2026-07-12 THA634 - Jul 12, 06:05 UTCJul 12, 06:15 UTC10m
2026-07-11 THA921 - Jul 11, 13:45 UTCJul 11, 23:40 UTC9h 55m
2026-07-10 THA920 - Jul 10, 17:05 UTCJul 11, 04:15 UTC11h 10m
2026-07-10 THA639 - Jul 10, 13:15 UTCJul 10, 13:50 UTC35m
2026-07-10 THA639 - Jul 10, 11:30 UTCJul 10, 11:40 UTC10m
2026-07-10 THA638 - Jul 10, 09:25 UTCJul 10, 09:45 UTC20m
2026-07-10 THA638 - Jul 10, 07:25 UTCJul 10, 07:50 UTC25m
2026-07-09 THA923 FRA → BKK Jul 9, 19:15 UTCJul 10, 05:25 UTC10h 10m
2026-07-09 THA922 - Jul 9, 05:50 UTCJul 9, 17:05 UTC11h 15m
2026-07-08 THA951 - Jul 8, 12:40 UTCJul 8, 22:15 UTC9h 35m
2026-07-07 THA950 - Jul 7, 18:35 UTCJul 8, 05:50 UTC11h 15m
2026-07-07 THA683 HND → BKK Jul 7, 02:10 UTCJul 7, 07:55 UTC5h 45m
2026-07-06 THA682 - Jul 6, 16:05 UTCJul 6, 21:40 UTC5h 35m
2026-07-05 THA917 LHR → BKK Jul 5, 20:40 UTCJul 6, 07:40 UTC11h 0m
2026-07-05 THA916 - Jul 5, 06:25 UTCJul 5, 08:50 UTC2h 25m
2026-07-04 THA661 - Jul 4, 15:35 UTCJul 4, 21:05 UTC5h 30m
2026-07-04 THA660 - Jul 4, 07:20 UTCJul 4, 12:55 UTC5h 35m
2026-07-03 THA923 FRA → BKK Jul 3, 19:15 UTCJul 4, 05:30 UTC10h 15m
2026-07-03 THA922 - Jul 3, 05:45 UTCJul 3, 16:50 UTC11h 5m
2026-07-02 THA921 - Jul 2, 13:45 UTCJul 3, 00:00 UTC10h 15m
2026-07-01 THA920 - Jul 1, 17:15 UTCJul 2, 04:05 UTC10h 50m
2026-07-01 THA639 - Jul 1, 11:40 UTCJul 1, 11:50 UTC10m
2026-07-01 THA638 - Jul 1, 09:35 UTCJul 1, 09:40 UTC5m
2026-07-01 THA638 - Jul 1, 07:25 UTCJul 1, 07:35 UTC10m
2026-06-30 THA923 - Jun 30, 19:10 UTCJul 1, 04:50 UTC9h 40m
2026-06-30 THA922 BKK → FRA Jun 30, 05:40 UTCJun 30, 16:50 UTC11h 10m
2026-06-29 THA951 - Jun 29, 12:55 UTCJun 29, 23:29 UTC10h 35m
2026-06-28 THA950 - Jun 28, 18:34 UTCJun 29, 05:40 UTC11h 5m
2026-06-28 THA404 - Jun 28, 05:29 UTCJun 28, 07:20 UTC1h 50m
2026-06-28 THA403 - Jun 28, 01:34 UTCJun 28, 03:19 UTC1h 45m
2026-06-27 THA971 ZRH → BKK Jun 27, 12:15 UTCJun 27, 22:09 UTC9h 55m
2026-06-26 THA970 - Jun 26, 18:29 UTCJun 26, 22:10 UTC3h 40m
2026-06-26 THA683 HND → BKK Jun 26, 02:34 UTCJun 26, 08:10 UTC5h 35m
2026-06-25 THA682 - Jun 25, 16:05 UTCJun 25, 21:35 UTC5h 30m
2026-06-25 THA601 - Jun 25, 05:29 UTCJun 25, 07:49 UTC2h 20m
2026-06-25 THA600 - Jun 25, 03:15 UTCJun 25, 03:34 UTC20m
2026-06-25 THA600 - Jun 25, 01:14 UTCJun 25, 02:39 UTC1h 25m
2026-06-24 THA316 - Jun 24, 18:34 UTCJun 24, 21:29 UTC2h 55m
2026-06-24 THA315 - Jun 24, 12:20 UTCJun 24, 15:54 UTC3h 35m
2026-06-24 THA601 - Jun 24, 06:55 UTCJun 24, 07:20 UTC25m
2026-06-24 THA601 - Jun 24, 05:09 UTCJun 24, 05:20 UTC10m
2026-06-24 THA600 - Jun 24, 03:15 UTCJun 24, 03:29 UTC15m
2026-06-24 THA600 - Jun 24, 01:09 UTCJun 24, 02:40 UTC1h 30m
2026-06-23 THA951 - Jun 23, 12:29 UTCJun 23, 22:55 UTC10h 25m
2026-06-22 THA950 - Jun 22, 18:35 UTCJun 22, 19:34 UTC1h 0m

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-TKQ page for operator, model, and routing details .

Mode-S 885171 frequently asked

What is Mode-S code 885171?
885171 is an ICAO 24-bit transponder address. Allocated to Thailand. Assigned to HS-TKQ.
Where is Mode-S 885171 registered?
Mode-S code 885171 is allocated to Thailand (TH). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 885171 broadcasting right now?
No active broadcast right now. Last signal was 9h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 885171, octal 42050561, decimal 8,933,745.
What flights does 885171 operate?
Mode-S 885171 has broadcast 20 distinct callsigns, including THA922, THA971, THA683, THA682, THA923.