Apparatus

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sensors Mode-S transponder

0C21FD

ICAO 24-bit transponder address · allocated to Suriname

Hex
0C21FD
Octal
03020775
Decimal
795,133
Country
SR
No current signal · last broadcast 12d ago
Flights observed
123
Distinct callsigns
20
Country
SR
Last broadcast
12d ago

Last known position

Most recent position reported by Mode-S 0C21FD.

Country allocation

The ICAO 24-bit address 0C21FD 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
CMP752 Copa Airlines 19 2026-07-25
CMP734 Copa Airlines 17 2026-07-22
CMP820 Copa Airlines 6 2026-07-19
BOE123 - 6 2026-05-13
CMP769 - 5 2026-07-13
CMP821 - 4 2026-07-18
CMP477 - 4 2026-07-16
CMP205 - 4 2026-06-27
CMP476 - 3 2026-07-15
CMP424 - 3 2026-07-11
CMP422 - 3 2026-06-24
CMP295 - 3 2026-06-21
CMP228 Copa Airlines 3 2026-07-21
BOE921 - 3 2026-05-22
CMP876 - 2 2026-07-11
CMP855 - 2 2026-07-13
CMP765 - 2 2026-07-13
CMP484 Copa Airlines 2 2026-06-24
CMP456 - 2 2026-07-02
CMP434 - 2 2026-07-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 CMP421 MDZ → PTY Jul 25, 17:25 UTCJul 26, 14:35 UTC21h 11m
2026-07-25 CMP421 MDZ → PTY Jul 25, 13:55 UTCJul 26, 09:20 UTC19h 26m
2026-07-25 CMP426 PUJ → PTY Jul 25, 10:10 UTCJul 26, 09:15 UTC23h 6m
2026-07-25 CMP753 SSA → PTY Jul 25, 05:25 UTCJul 26, 00:00 UTC18h 35m
2026-07-25 CMP752 PTY → SSA Jul 25, 01:40 UTCJul 26, 00:00 UTC22h 20m
2026-07-24 CMP752 PTY → SSA Jul 24, 21:50 UTCJul 25, 18:45 UTC20h 55m
2026-07-24 CMP752 PTY → SSA Jul 24, 17:35 UTCJul 25, 15:10 UTC21h 35m
2026-07-24 CMP752 PTY → SSA Jul 24, 13:50 UTCJul 25, 10:40 UTC20h 50m
2026-07-24 CMP752 PTY → SSA Jul 24, 10:15 UTCJul 25, 05:55 UTC19h 40m
2026-07-23 CMP129 - Jul 23, 17:25 UTCJul 23, 23:20 UTC5h 55m
2026-07-22 CMP734 CNF → PTY Jul 22, 21:35 UTCJul 23, 15:25 UTC17h 50m
2026-07-22 CMP734 CNF → PTY Jul 22, 18:05 UTCJul 23, 15:25 UTC21h 20m
2026-07-22 CMP734 CNF → PTY Jul 22, 16:40 UTCJul 23, 14:35 UTC21h 55m
2026-07-21 CMP229 ORD → PTY Jul 21, 20:55 UTCJul 22, 05:25 UTC8h 30m
2026-07-21 CMP228 PTY → ORD Jul 21, 01:30 UTCJul 21, 18:55 UTC17h 25m
2026-07-20 CMP228 PTY → ORD Jul 20, 21:40 UTCJul 21, 18:55 UTC21h 14m
2026-07-20 CMP228 PTY → ORD Jul 20, 17:20 UTCJul 21, 17:15 UTC23h 54m
2026-07-19 CMP752 PTY → SSA Jul 19, 22:00 UTCJul 20, 15:35 UTC17h 35m
2026-07-19 CMP752 PTY → SSA Jul 19, 18:10 UTCJul 20, 15:35 UTC21h 25m
2026-07-19 CMP752 PTY → SSA Jul 19, 14:15 UTCJul 20, 10:55 UTC20h 40m
2026-07-19 CMP752 PTY → SSA Jul 19, 09:20 UTCJul 20, 06:10 UTC20h 50m
2026-07-19 CMP752 PTY → SSA Jul 19, 08:55 UTCJul 20, 06:10 UTC21h 15m
2026-07-19 CMP820 POA → PTY Jul 19, 05:25 UTCJul 20, 02:55 UTC21h 30m
2026-07-19 CMP820 POA → PTY Jul 19, 01:25 UTCJul 19, 22:30 UTC21h 5m
2026-07-18 CMP820 POA → PTY Jul 18, 21:25 UTCJul 19, 18:35 UTC21h 10m
2026-07-18 CMP820 POA → PTY Jul 18, 17:50 UTCJul 19, 14:35 UTC20h 45m
2026-07-18 CMP820 POA → PTY Jul 18, 17:05 UTCJul 19, 14:35 UTC21h 30m
2026-07-18 CMP820 POA → PTY Jul 18, 13:10 UTCJul 19, 11:05 UTC21h 55m
2026-07-18 CMP821 - Jul 18, 09:45 UTCJul 19, 09:15 UTC23h 30m
2026-07-18 CMP821 - Jul 18, 08:50 UTCJul 19, 06:30 UTC21h 40m
2026-07-18 CMP821 - Jul 18, 06:05 UTCJul 19, 02:20 UTC20h 15m
2026-07-18 CMP734 CNF → PTY Jul 18, 01:20 UTCJul 18, 23:10 UTC21h 51m
2026-07-18 CMP734 CNF → PTY Jul 18, 01:10 UTCJul 18, 23:10 UTC22h 1m
2026-07-17 CMP734 CNF → PTY Jul 17, 21:39 UTCJul 18, 18:15 UTC20h 36m
2026-07-17 CMP463 PTY → COR Jul 17, 15:20 UTCJul 17, 15:29 UTC10m
2026-07-16 CMP361 - Jul 16, 22:45 UTCJul 17, 10:20 UTC11h 35m
2026-07-16 CMP477 DEN → GUA Jul 16, 04:55 UTCJul 16, 14:29 UTC9h 35m
2026-07-15 CMP476 - Jul 15, 09:50 UTCJul 15, 23:35 UTC13h 45m
2026-07-15 CMP291 - Jul 15, 03:20 UTCJul 15, 07:50 UTC4h 30m
2026-07-14 CMP291 - Jul 14, 09:55 UTCJul 15, 07:50 UTC21h 54m
2026-07-14 CMP734 - Jul 14, 06:10 UTCJul 15, 05:15 UTC23h 4m
2026-07-13 CMP765 - Jul 13, 17:15 UTCJul 14, 10:10 UTC16h 55m
2026-07-13 CMP855 - Jul 13, 13:20 UTCJul 14, 10:10 UTC20h 50m
2026-07-13 CMP855 - Jul 13, 07:40 UTCJul 14, 06:50 UTC23h 10m
2026-07-13 CMP769 - Jul 13, 05:45 UTCJul 14, 01:45 UTC20h 0m
2026-07-13 CMP769 - Jul 13, 04:30 UTCJul 14, 01:45 UTC21h 15m
2026-07-13 CMP769 - Jul 13, 01:20 UTCJul 14, 01:15 UTC23h 55m
2026-07-12 CMP769 - Jul 12, 23:20 UTCJul 13, 22:35 UTC23h 15m
2026-07-12 CMP769 - Jul 12, 23:10 UTCJul 13, 17:50 UTC18h 40m
2026-07-12 CMP478 BOG → MCO Jul 12, 14:05 UTCJul 12, 20:40 UTC6h 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.

Mode-S 0C21FD frequently asked

What is Mode-S code 0C21FD?
0C21FD is an ICAO 24-bit transponder address. Allocated to Suriname.
Where is Mode-S 0C21FD registered?
Mode-S code 0C21FD is allocated to Suriname (SR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 0C21FD broadcasting right now?
No active broadcast right now. Last signal was 12d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 0C21FD, octal 03020775, decimal 795,133.
What flights does 0C21FD operate?
Mode-S 0C21FD has broadcast 20 distinct callsigns, including CMP752, CMP734, CMP820, BOE123, CMP769.