Apparatus

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sensors Mode-S transponder

0C21A6

ICAO 24-bit transponder address · allocated to Suriname

Currently assigned to HP-9804CMP · BOEING 737 MAX 8

Hex
0C21A6
Octal
03020646
Decimal
795,046
Country
SR
Tail
HP-9804CMP
Type
B38M
No current signal · last broadcast Jul 26, 18:55 UTC
Flights observed
242
Distinct callsigns
20
Country
SR
Last broadcast
Jul 26, 18:55 UTC

Last known position

Most recent position reported by Mode-S 0C21A6.

Country allocation

The ICAO 24-bit address 0C21A6 falls within the block assigned to Suriname (SR) by ICAO Annex 10, Volume III. Every aircraft registered in Suriname 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
CMP734 - 10 2026-07-09
CMP456 Copa Airlines 10 2026-07-25
CMP476 Copa Airlines 9 2026-07-20
CMP880 - 8 2026-07-24
CMP891 Copa Airlines 7 2026-07-24
CMP253 Copa Airlines 7 2026-07-26
CMP821 Copa Airlines 6 2026-06-02
CMP820 Copa Airlines 6 2026-06-03
CMP479 Copa Airlines 6 2026-05-20
CMP451 Copa Airlines 6 2026-07-23
CMP149 - 6 2026-07-04
CMP138 - 6 2026-07-03
CMP122 Copa Airlines 6 2026-07-07
CMP746 Copa Airlines 5 2026-06-03
CMP477 Copa Airlines 5 2026-07-21
CMP450 Copa Airlines 5 2026-07-23
CMP884 - 4 2026-07-12
CMP732 - 4 2026-07-14
CMP446 Copa Airlines 4 2026-05-20
CMP423 Copa Airlines 4 2026-07-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CMP253 LAS → PTY Jul 26, 08:05 UTCJul 26, 18:55 UTC10h 50m
2026-07-25 CMP456 PTY → LAS Jul 25, 17:50 UTCJul 26, 05:10 UTC11h 20m
2026-07-24 CMP891 ATL → PTY Jul 24, 22:25 UTCJul 25, 15:45 UTC17h 20m
2026-07-24 CMP880 COR → ATL Jul 24, 07:35 UTCJul 24, 19:30 UTC11h 55m
2026-07-23 CMP788 PTY → COR Jul 23, 19:15 UTCJul 24, 06:10 UTC10h 55m
2026-07-23 CMP451 SJU → PTY Jul 23, 11:05 UTCJul 23, 17:00 UTC5h 55m
2026-07-23 CMP451 SJU → PTY Jul 23, 09:45 UTCJul 23, 10:00 UTC15m
2026-07-23 CMP450 PTY → SJU Jul 23, 02:15 UTCJul 23, 02:25 UTC10m
2026-07-22 CMP261 BGI → PTY Jul 22, 18:45 UTCJul 23, 01:05 UTC6h 20m
2026-07-22 CMP260 PTY → BGI Jul 22, 05:05 UTCJul 22, 17:20 UTC12h 15m
2026-07-21 CMP423 YUL → PTY Jul 21, 09:50 UTCJul 22, 03:35 UTC17h 45m
2026-07-21 CMP423 YUL → PTY Jul 21, 07:35 UTCJul 22, 03:35 UTC20h 0m
2026-07-21 CMP477 DEN → PTY Jul 21, 05:40 UTCJul 22, 03:35 UTC21h 55m
2026-07-20 CMP476 PTY → DEN Jul 20, 14:45 UTCJul 20, 23:25 UTC8h 40m
2026-07-19 CMP709 BWI → PTY Jul 19, 20:50 UTCJul 20, 05:15 UTC8h 25m
2026-07-18 CMP708 - Jul 18, 23:35 UTCJul 19, 18:55 UTC19h 20m
2026-07-18 CMP708 - Jul 18, 22:25 UTCJul 19, 18:55 UTC20h 30m
2026-07-18 CMP421 MDZ → PTY Jul 18, 17:45 UTCJul 19, 17:30 UTC23h 45m
2026-07-18 CMP421 MDZ → PTY Jul 18, 14:05 UTCJul 19, 11:10 UTC21h 5m
2026-07-18 CMP200 - Jul 18, 01:25 UTCJul 18, 01:39 UTC15m
2026-07-17 CMP868 - Jul 17, 19:55 UTCJul 17, 22:20 UTC2h 25m
2026-07-17 CMP836 - Jul 17, 06:10 UTCJul 17, 17:30 UTC11h 20m
2026-07-16 CMP882 - Jul 16, 15:30 UTCJul 17, 03:30 UTC12h 0m
2026-07-15 CMP247 - Jul 15, 20:30 UTCJul 16, 18:19 UTC21h 50m
2026-07-15 CMP763 - Jul 15, 14:30 UTCJul 15, 20:30 UTC6h 0m
2026-07-14 CMP732 - Jul 14, 22:55 UTCJul 15, 13:15 UTC14h 20m
2026-07-14 CMP732 - Jul 14, 17:20 UTCJul 15, 13:15 UTC19h 54m
2026-07-14 CMP732 - Jul 14, 15:00 UTCJul 15, 13:15 UTC22h 14m
2026-07-14 CMP732 - Jul 14, 09:35 UTCJul 15, 08:25 UTC22h 49m
2026-07-14 CMP186 - Jul 14, 06:50 UTCJul 15, 00:45 UTC17h 54m
2026-07-13 CMP175 - Jul 13, 14:10 UTCJul 14, 04:50 UTC14h 40m
2026-07-12 CMP884 - Jul 12, 19:35 UTCJul 13, 14:40 UTC19h 5m
2026-07-12 CMP760 - Jul 12, 19:01 UTCJul 13, 14:40 UTC19h 40m
2026-07-12 CMP761 - Jul 12, 16:25 UTCJul 12, 17:05 UTC40m
2026-07-12 CMP451 - Jul 12, 09:55 UTCJul 12, 10:05 UTC10m
2026-07-12 CMP450 - Jul 12, 01:55 UTCJul 12, 02:10 UTC15m
2026-07-11 CMP833 JFK → PTY Jul 11, 19:55 UTCJul 11, 20:10 UTC15m
2026-07-10 CMP445 - Jul 10, 23:35 UTCJul 11, 18:25 UTC18h 50m
2026-07-10 CMP445 - Jul 10, 22:30 UTCJul 11, 18:25 UTC19h 55m
2026-07-10 CMP478 - Jul 10, 18:05 UTCJul 10, 20:25 UTC2h 20m
2026-07-09 CMP733 - Jul 9, 14:15 UTCJul 10, 08:25 UTC18h 10m
2026-07-09 CMP733 - Jul 9, 10:25 UTCJul 10, 08:25 UTC22h 0m
2026-07-09 CMP734 - Jul 9, 06:10 UTCJul 10, 00:40 UTC18h 30m
2026-07-09 CMP734 - Jul 9, 00:50 UTCJul 9, 16:55 UTC16h 5m
2026-07-08 CMP734 - Jul 8, 17:50 UTCJul 9, 16:55 UTC23h 5m
2026-07-08 CMP123 - Jul 8, 16:55 UTCJul 9, 14:20 UTC21h 25m
2026-07-07 CMP122 PTY → CUN Jul 7, 23:15 UTCJul 8, 15:10 UTC15h 55m
2026-07-07 CMP122 PTY → CUN Jul 7, 17:05 UTCJul 8, 15:10 UTC22h 5m
2026-07-07 CMP463 PTY → COR Jul 7, 14:55 UTCJul 7, 15:05 UTC10m
2026-07-06 CMP433 - Jul 6, 12:35 UTCJul 6, 14:15 UTC1h 40m

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 HP-9804CMP page for operator, model, and routing details .

Mode-S 0C21A6 frequently asked

What is Mode-S code 0C21A6?
0C21A6 is an ICAO 24-bit transponder address. Allocated to Suriname. Assigned to HP-9804CMP.
Where is Mode-S 0C21A6 registered?
Mode-S code 0C21A6 is allocated to Suriname (SR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 0C21A6 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 18:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 0C21A6, octal 03020646, decimal 795,046.
What flights does 0C21A6 operate?
Mode-S 0C21A6 has broadcast 20 distinct callsigns, including CMP734, CMP456, CMP476, CMP880, CMP891.