sensors Mode-S transponder

0C21DC

ICAO 24-bit transponder address · allocated to Suriname

Currently assigned to HP-9812CMP · BOEING 737 MAX 8

Hex
0C21DC
Octal
03020734
Decimal
795,100
Country
SR
Tail
HP-9812CMP
Type
B38M
No current signal · last broadcast 5h ago
Flights observed
186
Distinct callsigns
20
Country
SR
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S 0C21DC.

Country allocation

The ICAO 24-bit address 0C21DC 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 - 15 2026-06-15
CMP820 - 10 2026-06-28
CMP765 Copa Airlines 9 2026-05-15
CMP424 - 7 2026-07-04
CMP422 Copa Airlines 5 2026-04-28
CMP420 - 5 2026-07-02
CMP195 - 5 2026-07-08
CMP194 - 5 2026-07-07
CMP122 Copa Airlines 5 2026-07-13
CMP753 Copa Airlines 4 2026-05-02
CMP478 Copa Airlines 4 2026-05-20
CMP456 - 4 2026-07-11
CMP423 - 4 2026-07-03
CMP421 Copa Airlines 4 2026-05-23
CMP236 Copa Airlines 4 2026-06-19
CMP752 Copa Airlines 3 2026-06-02
CMP489 Copa Airlines 3 2026-06-07
CMP484 Copa Airlines 3 2026-04-28
CMP479 - 3 2026-06-29
CMP446 Copa Airlines 3 2026-05-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CMP764 - Jul 14, 19:10 UTCJul 14, 19:20 UTC10m
2026-07-13 CMP745 - Jul 13, 22:35 UTCJul 14, 14:20 UTC15h 45m
2026-07-13 CMP745 - Jul 13, 17:15 UTCJul 14, 14:20 UTC21h 5m
2026-07-13 CMP122 PTY → CUN Jul 13, 14:20 UTCJul 13, 16:00 UTC1h 40m
2026-07-13 CMP208 - Jul 13, 00:30 UTCJul 13, 00:40 UTC10m
2026-07-12 CMP326 - Jul 12, 19:25 UTCJul 12, 20:50 UTC1h 25m
2026-07-12 CMP253 LAS → CUN Jul 12, 07:45 UTCJul 12, 17:50 UTC10h 5m
2026-07-11 CMP456 CUN → LAS Jul 11, 17:35 UTCJul 12, 05:05 UTC11h 30m
2026-07-11 CMP122 PTY → CUN Jul 11, 10:25 UTCJul 11, 15:40 UTC5h 15m
2026-07-10 CMP477 - Jul 10, 05:00 UTCJul 10, 21:05 UTC16h 5m
2026-07-09 CMP476 GUA → DEN Jul 9, 13:25 UTCJul 10, 00:10 UTC10h 45m
2026-07-08 CMP195 - Jul 8, 12:30 UTCJul 9, 04:25 UTC15h 55m
2026-07-07 CMP194 - Jul 7, 11:05 UTCJul 8, 06:00 UTC18h 55m
2026-07-07 CMP194 - Jul 7, 10:25 UTCJul 8, 06:00 UTC19h 35m
2026-07-06 CMP312 BOS → PTY Jul 6, 12:55 UTCJul 7, 02:50 UTC13h 55m
2026-07-05 CMP366 - Jul 5, 23:30 UTCJul 6, 02:15 UTC2h 45m
2026-07-05 CMP892 PTY → ADZ Jul 5, 16:20 UTCJul 5, 16:25 UTC5m
2026-07-04 CMP424 - Jul 4, 06:30 UTCJul 4, 15:20 UTC8h 50m
2026-07-04 CMP424 - Jul 4, 04:40 UTCJul 4, 05:05 UTC25m
2026-07-03 CMP423 - Jul 3, 14:25 UTCJul 4, 03:05 UTC12h 40m
2026-07-02 CMP420 - Jul 2, 23:25 UTCJul 3, 23:00 UTC23h 35m
2026-07-02 CMP420 - Jul 2, 17:35 UTCJul 3, 16:55 UTC23h 20m
2026-07-02 CMP420 - Jul 2, 15:10 UTCJul 3, 14:30 UTC23h 20m
2026-07-02 CMP424 - Jul 2, 05:45 UTCJul 3, 00:15 UTC18h 30m
2026-07-02 CMP424 - Jul 2, 04:30 UTCJul 3, 00:15 UTC19h 45m
2026-07-01 CMP423 - Jul 1, 16:40 UTCJul 2, 03:00 UTC10h 20m
2026-06-30 CMP316 - Jun 30, 23:55 UTCJul 1, 15:05 UTC15h 10m
2026-06-29 CMP479 - Jun 29, 18:49 UTCJun 29, 21:09 UTC2h 20m
2026-06-28 CMP820 - Jun 28, 22:34 UTCJun 29, 16:19 UTC17h 45m
2026-06-28 CMP894 JFK → PTY Jun 28, 18:00 UTCJun 28, 18:10 UTC10m
2026-06-27 CMP361 - Jun 27, 23:04 UTCJun 28, 00:04 UTC1h 0m
2026-06-27 CMP380 GUA → MGA Jun 27, 04:49 UTCJun 27, 14:29 UTC9h 40m
2026-06-26 CMP195 MEX → PTY Jun 26, 12:10 UTCJun 27, 04:49 UTC16h 40m
2026-06-25 CMP891 ATL → MEX Jun 25, 21:29 UTCJun 26, 06:15 UTC8h 45m
2026-06-25 CMP253 LAS → ATL Jun 25, 07:39 UTCJun 25, 19:29 UTC11h 50m
2026-06-24 CMP456 GUA → LAS Jun 24, 13:24 UTCJun 25, 05:05 UTC15h 40m
2026-06-23 CMP496 - Jun 23, 15:19 UTCJun 24, 04:30 UTC13h 10m
2026-06-21 CMP709 - Jun 21, 21:05 UTCJun 22, 00:29 UTC3h 25m
2026-06-21 CMP708 PTY → BWI Jun 21, 15:15 UTCJun 21, 19:09 UTC3h 55m
2026-06-19 CMP236 ORD → PTY Jun 19, 15:04 UTCJun 20, 09:09 UTC18h 5m
2026-06-19 CMP236 ORD → PTY Jun 19, 13:24 UTCJun 20, 09:09 UTC19h 45m
2026-06-19 CMP844 PTY → ORD Jun 19, 06:35 UTCJun 19, 11:09 UTC4h 35m
2026-06-18 CMP844 PTY → ORD Jun 18, 10:30 UTCJun 19, 08:59 UTC22h 29m
2026-06-15 CMP820 - Jun 15, 23:04 UTCJun 16, 17:30 UTC18h 25m
2026-06-15 CMP821 - Jun 15, 21:30 UTCJun 16, 17:30 UTC20h 0m
2026-06-15 CMP821 - Jun 15, 16:15 UTCJun 16, 09:20 UTC17h 5m
2026-06-15 CMP869 PTY → SDQ Jun 15, 14:15 UTCJun 15, 14:24 UTC10m
2026-06-11 CMP459 MCO → PTY Jun 11, 21:20 UTCJun 11, 22:05 UTC45m
2026-06-11 CMP862 PTY → MCO Jun 11, 10:25 UTCJun 11, 18:00 UTC7h 35m
2026-06-10 CMP709 BWI → PTY Jun 10, 22:25 UTCJun 11, 00:40 UTC2h 15m

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-9812CMP page for operator, model, and routing details .

Mode-S 0C21DC frequently asked

What is Mode-S code 0C21DC?
0C21DC is an ICAO 24-bit transponder address. Allocated to Suriname. Assigned to HP-9812CMP.
Where is Mode-S 0C21DC registered?
Mode-S code 0C21DC is allocated to Suriname (SR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 0C21DC broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 0C21DC, octal 03020734, decimal 795,100.
What flights does 0C21DC operate?
Mode-S 0C21DC has broadcast 20 distinct callsigns, including CMP821, CMP820, CMP765, CMP424, CMP422.