sensors Mode-S transponder

0C21A5

ICAO 24-bit transponder address · allocated to Suriname

Currently assigned to HP-9803CMP · BOEING 737 MAX 8

Hex
0C21A5
Octal
03020645
Decimal
795,045
Country
SR
Tail
HP-9803CMP
Type
B38M
No current signal · last broadcast Jul 26, 19:50 UTC
Flights observed
232
Distinct callsigns
20
Country
SR
Last broadcast
Jul 26, 19:50 UTC

Last known position

Most recent position reported by Mode-S 0C21A5.

Country allocation

The ICAO 24-bit address 0C21A5 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
CMP821 Copa Airlines 16 2026-07-23
CMP420 Copa Airlines 12 2026-07-20
CMP421 - 11 2026-07-16
CMP734 - 10 2026-07-10
CMP424 - 7 2026-07-01
CMP423 Copa Airlines 6 2026-05-29
CMP287 - 6 2026-07-03
CMP476 Copa Airlines 5 2026-07-19
CMP361 Copa Airlines 5 2026-07-21
CMP122 Copa Airlines 5 2026-07-09
CMP868 Copa Airlines 4 2026-07-24
CMP820 - 4 2026-07-11
CMP709 - 4 2026-07-15
CMP317 - 4 2026-07-20
CMP496 Copa Airlines 3 2026-06-05
CMP477 Copa Airlines 3 2026-07-20
CMP456 Copa Airlines 3 2026-07-22
CMP312 Copa Airlines 3 2026-06-19
CMP285 Copa Airlines 3 2026-06-03
CMP262 Copa Airlines 3 2026-04-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CMP471 YYZ → PTY Jul 26, 12:30 UTCJul 26, 19:50 UTC7h 20m
2026-07-25 CMP470 PTY → YYZ Jul 25, 20:00 UTCJul 26, 04:45 UTC8h 45m
2026-07-25 CMP832 - Jul 25, 17:05 UTCJul 25, 18:15 UTC1h 10m
2026-07-24 CMP868 MCO → PTY Jul 24, 19:45 UTCJul 25, 01:20 UTC5h 35m
2026-07-23 CMP821 PTY → POA Jul 23, 22:10 UTCJul 24, 17:35 UTC19h 25m
2026-07-23 CMP253 LAS → PTY Jul 23, 07:45 UTCJul 23, 13:10 UTC5h 25m
2026-07-22 CMP456 PTY → LAS Jul 22, 20:40 UTCJul 23, 05:20 UTC8h 40m
2026-07-22 CMP195 - Jul 22, 12:25 UTCJul 22, 18:45 UTC6h 20m
2026-07-21 CMP361 GUA → PTY Jul 21, 22:35 UTCJul 22, 05:25 UTC6h 50m
2026-07-20 CMP420 PTY → MDZ Jul 20, 23:30 UTCJul 21, 14:50 UTC15h 19m
2026-07-20 CMP420 PTY → MDZ Jul 20, 17:20 UTCJul 21, 14:50 UTC21h 29m
2026-07-20 CMP317 CUN → GUA Jul 20, 16:10 UTCJul 21, 14:50 UTC22h 40m
2026-07-20 CMP477 DEN → PTY Jul 20, 05:10 UTCJul 20, 14:40 UTC9h 30m
2026-07-19 CMP476 PTY → DEN Jul 19, 15:05 UTCJul 19, 23:25 UTC8h 20m
2026-07-19 CMP860 PTY → BOG Jul 19, 00:05 UTCJul 19, 06:20 UTC6h 15m
2026-07-18 CMP123 CUN → SJO Jul 18, 17:35 UTCJul 18, 22:50 UTC5h 15m
2026-07-17 CMP821 - Jul 17, 21:20 UTCJul 18, 15:40 UTC18h 21m
2026-07-17 CMP821 - Jul 17, 09:20 UTCJul 18, 09:15 UTC23h 56m
2026-07-17 CMP821 - Jul 17, 08:45 UTCJul 18, 06:35 UTC21h 51m
2026-07-16 CMP821 - Jul 16, 23:20 UTCJul 17, 23:14 UTC23h 55m
2026-07-16 CMP421 - Jul 16, 15:19 UTCJul 17, 09:40 UTC18h 20m
2026-07-16 CMP421 - Jul 16, 15:14 UTCJul 17, 09:40 UTC18h 25m
2026-07-15 CMP709 - Jul 15, 23:20 UTCJul 16, 23:15 UTC23h 55m
2026-07-15 CMP709 - Jul 15, 21:25 UTCJul 16, 17:35 UTC20h 10m
2026-07-15 CMP708 SJO → BWI Jul 15, 12:00 UTCJul 15, 18:55 UTC6h 55m
2026-07-15 CMP162 - Jul 15, 03:10 UTCJul 15, 03:35 UTC25m
2026-07-14 CMP363 - Jul 14, 21:40 UTCJul 14, 21:50 UTC10m
2026-07-14 CMP193 - Jul 14, 18:25 UTCJul 14, 18:40 UTC15m
2026-07-14 CMP192 - Jul 14, 17:00 UTCJul 14, 17:25 UTC25m
2026-07-13 CMP326 CUN → SJO Jul 13, 19:30 UTCJul 14, 17:25 UTC21h 55m
2026-07-12 CMP113 PTY → CUN Jul 12, 23:20 UTCJul 13, 18:00 UTC18h 40m
2026-07-12 CMP709 - Jul 12, 21:25 UTCJul 13, 18:00 UTC20h 35m
2026-07-12 CMP708 - Jul 12, 17:01 UTCJul 12, 19:30 UTC2h 30m
2026-07-11 CMP760 - Jul 11, 19:50 UTCJul 11, 20:30 UTC40m
2026-07-11 CMP820 - Jul 11, 01:15 UTCJul 11, 17:55 UTC16h 40m
2026-07-10 CMP821 - Jul 10, 22:30 UTCJul 11, 17:55 UTC19h 25m
2026-07-10 CMP821 - Jul 10, 16:55 UTCJul 11, 09:20 UTC16h 25m
2026-07-10 CMP821 - Jul 10, 09:55 UTCJul 11, 09:15 UTC23h 20m
2026-07-10 CMP821 - Jul 10, 08:50 UTCJul 11, 06:05 UTC21h 15m
2026-07-10 CMP734 - Jul 10, 06:05 UTCJul 11, 01:15 UTC19h 10m
2026-07-10 CMP734 - Jul 10, 00:50 UTCJul 10, 23:15 UTC22h 25m
2026-07-09 CMP734 - Jul 9, 21:40 UTCJul 10, 16:55 UTC19h 15m
2026-07-09 CMP734 - Jul 9, 17:20 UTCJul 10, 16:55 UTC23h 35m
2026-07-09 CMP123 - Jul 9, 17:00 UTCJul 10, 10:10 UTC17h 10m
2026-07-09 CMP122 PTY → CUN Jul 9, 13:30 UTCJul 9, 15:10 UTC1h 40m
2026-07-08 CMP479 - Jul 8, 19:05 UTCJul 8, 21:10 UTC2h 5m
2026-07-08 CMP446 - Jul 8, 14:10 UTCJul 8, 16:25 UTC2h 15m
2026-07-07 CMP195 - Jul 7, 12:10 UTCJul 7, 14:35 UTC2h 25m
2026-07-06 CMP194 GUA → MEX Jul 6, 22:40 UTCJul 7, 06:15 UTC7h 35m
2026-07-06 CMP361 GUA → GUA Jul 6, 16:40 UTCJul 6, 21:30 UTC4h 50m

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-9803CMP page for operator, model, and routing details .

Mode-S 0C21A5 frequently asked

What is Mode-S code 0C21A5?
0C21A5 is an ICAO 24-bit transponder address. Allocated to Suriname. Assigned to HP-9803CMP.
Where is Mode-S 0C21A5 registered?
Mode-S code 0C21A5 is allocated to Suriname (SR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 0C21A5 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 0C21A5, octal 03020645, decimal 795,045.
What flights does 0C21A5 operate?
Mode-S 0C21A5 has broadcast 20 distinct callsigns, including CMP821, CMP420, CMP421, CMP734, CMP424.