Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

0C21F9

ICAO 24-bit transponder address · allocated to Suriname

Currently assigned to HP-9817CMP · BOEING 737 MAX 8

Hex
0C21F9
Octal
03020771
Decimal
795,129
Country
SR
Tail
HP-9817CMP
Type
B38M
No current signal · last broadcast 1h ago
Flights observed
101
Distinct callsigns
20
Country
SR
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 0C21F9.

Country allocation

The ICAO 24-bit address 0C21F9 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
CMP867 Copa Airlines 6 2026-05-18
CMP734 Copa Airlines 6 2026-05-08
CMP820 Copa Airlines 5 2026-05-16
CMP421 Copa Airlines 5 2026-05-15
CMP420 Copa Airlines 5 2026-05-27
CMP868 Copa Airlines 4 2026-05-19
CMP752 Copa Airlines 4 2026-05-26
CMP456 Copa Airlines 4 2026-05-23
CMP765 Copa Airlines 3 2026-05-08
CMP761 Copa Airlines 3 2026-04-28
CMP760 Copa Airlines 3 2026-05-26
CMP253 Copa Airlines 3 2026-05-24
CMP821 Copa Airlines 2 2026-05-16
CMP709 Copa Airlines 2 2026-05-21
CMP708 Copa Airlines 2 2026-05-20
CMP450 Copa Airlines 2 2026-04-28
CMP446 Copa Airlines 2 2026-05-02
CMP290 Copa Airlines 2 2026-05-29
CMP229 Copa Airlines 2 2026-04-29
CMP228 Copa Airlines 2 2026-04-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 CMP132 LIM → PTY May 29, 22:15 UTCMay 30, 04:00 UTC5h 45m
2026-05-29 CMP290 ASU → PTY May 29, 09:50 UTCMay 29, 20:10 UTC10h 20m
2026-05-28 CMP291 PTY → ASU May 28, 22:35 UTCMay 29, 08:15 UTC9h 40m
2026-05-27 CMP420 PTY → MDZ May 27, 23:00 UTCMay 28, 14:50 UTC15h 50m
2026-05-27 CMP420 PTY → MDZ May 27, 17:25 UTCMay 28, 14:50 UTC21h 25m
2026-05-27 CMP463 PTY → COR May 27, 15:15 UTCMay 27, 15:25 UTC10m
2026-05-26 CMP760 LIM → PTY May 26, 19:10 UTCMay 27, 15:25 UTC20h 15m
2026-05-26 CMP752 PTY → SSA May 26, 01:20 UTCMay 26, 17:05 UTC15h 45m
2026-05-25 CMP752 PTY → SSA May 25, 21:49 UTCMay 26, 17:05 UTC19h 15m
2026-05-25 CMP752 PTY → SSA May 25, 16:20 UTCMay 26, 10:39 UTC18h 20m
2026-05-25 CMP752 PTY → SSA May 25, 16:05 UTCMay 26, 10:39 UTC18h 34m
2026-05-25 CMP285 PTY → MCO May 25, 02:20 UTCMay 25, 02:25 UTC5m
2026-05-24 CMP253 LAS → PTY May 24, 07:45 UTCMay 25, 02:15 UTC18h 30m
2026-05-23 CMP456 PTY → LAS May 23, 18:35 UTCMay 24, 05:20 UTC10h 45m
2026-05-22 CMP132 LIM → PTY May 22, 22:20 UTCMay 23, 16:35 UTC18h 15m
2026-05-22 CMP253 LAS → PTY May 22, 07:45 UTCMay 22, 20:05 UTC12h 20m
2026-05-21 CMP456 PTY → LAS May 21, 23:45 UTCMay 22, 05:25 UTC5h 40m
2026-05-21 CMP456 PTY → LAS May 21, 02:20 UTCMay 22, 02:15 UTC23h 55m
2026-05-21 CMP709 BWI → PTY May 21, 00:20 UTCMay 21, 23:55 UTC23h 35m
2026-05-20 CMP709 BWI → PTY May 20, 23:00 UTCMay 21, 02:20 UTC3h 20m
2026-05-20 CMP708 PTY → BWI May 20, 15:40 UTCMay 20, 19:20 UTC3h 40m
2026-05-19 CMP708 PTY → BWI May 19, 20:20 UTCMay 20, 19:20 UTC23h 1m
2026-05-19 CMP868 MCO → PTY May 19, 19:55 UTCMay 20, 18:00 UTC22h 6m
2026-05-18 CMP867 PTY → MCO May 18, 23:15 UTCMay 19, 17:40 UTC18h 25m
2026-05-18 CMP420 PTY → MDZ May 18, 17:25 UTCMay 19, 15:30 UTC22h 4m
2026-05-18 CMP420 PTY → MDZ May 18, 15:00 UTCMay 18, 23:55 UTC8h 54m
2026-05-17 CMP760 LIM → PTY May 17, 19:05 UTCMay 18, 17:30 UTC22h 25m
2026-05-16 CMP820 POA → PTY May 16, 22:25 UTCMay 17, 16:55 UTC18h 30m
2026-05-16 CMP820 POA → PTY May 16, 17:10 UTCMay 17, 09:55 UTC16h 45m
2026-05-16 CMP821 PTY → POA May 16, 08:46 UTCMay 17, 06:30 UTC21h 45m
2026-05-15 CMP421 MDZ → PTY May 15, 23:30 UTCMay 16, 17:15 UTC17h 46m
2026-05-15 CMP421 MDZ → PTY May 15, 17:05 UTCMay 16, 09:31 UTC16h 26m
2026-05-15 CMP889 PTY → POP May 15, 14:55 UTCMay 15, 15:05 UTC10m
2026-05-14 CMP141 PTY → MAO May 14, 22:45 UTCMay 15, 10:15 UTC11h 30m
2026-05-14 CMP128 PTY → SDQ May 14, 13:05 UTCMay 14, 20:00 UTC6h 55m
2026-05-13 CMP266 FLL → PTY May 13, 22:30 UTCMay 14, 00:25 UTC1h 55m
2026-05-13 CMP265 PTY → FLL May 13, 12:35 UTCMay 13, 20:20 UTC7h 45m
2026-05-12 CMP441 PTY → MIA May 12, 18:45 UTCMay 13, 02:20 UTC7h 35m
2026-05-12 CMP789 COR → PTY May 12, 10:15 UTCMay 12, 16:50 UTC6h 35m
2026-05-11 CMP384 GUA → PTY May 11, 19:05 UTCMay 12, 16:50 UTC21h 45m
2026-05-11 CMP253 LAS → PTY May 11, 07:40 UTCMay 11, 17:45 UTC10h 5m
2026-05-10 CMP456 PTY → LAS May 10, 16:30 UTCMay 11, 05:05 UTC12h 35m
2026-05-09 CMP489 PTY → LIM May 9, 19:25 UTCMay 10, 03:25 UTC8h 0m
2026-05-08 CMP734 CNF → PTY May 8, 22:20 UTCMay 9, 17:20 UTC19h 0m
2026-05-08 CMP765 PTY → CNF May 8, 21:50 UTCMay 9, 17:20 UTC19h 30m
2026-05-08 CMP765 PTY → CNF May 8, 08:19 UTCMay 9, 08:00 UTC23h 40m
2026-05-08 CMP765 PTY → CNF May 8, 07:59 UTCMay 9, 05:55 UTC21h 55m
2026-05-07 CMP421 MDZ → PTY May 7, 23:34 UTCMay 8, 22:15 UTC22h 40m
2026-05-07 CMP421 MDZ → PTY May 7, 15:10 UTCMay 8, 08:55 UTC17h 45m
2026-05-06 CMP290 ASU → PTY May 6, 09:45 UTCMay 6, 13:20 UTC3h 35m

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-9817CMP page for operator, model, and routing details .

Mode-S 0C21F9 frequently asked

What is Mode-S code 0C21F9?
0C21F9 is an ICAO 24-bit transponder address. Allocated to Suriname. Assigned to HP-9817CMP.
Where is Mode-S 0C21F9 registered?
Mode-S code 0C21F9 is allocated to Suriname (SR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 0C21F9 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 0C21F9, octal 03020771, decimal 795,129.
What flights does 0C21F9 operate?
Mode-S 0C21F9 has broadcast 20 distinct callsigns, including CMP867, CMP734, CMP820, CMP421, CMP420.