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 12h ago
Flights observed
211
Distinct callsigns
20
Country
SR
Last broadcast
12h ago

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 - 9 2026-06-17
CMP476 Copa Airlines 8 2026-06-10
CMP880 Copa Airlines 7 2026-04-23
CMP891 - 6 2026-06-18
CMP821 Copa Airlines 6 2026-06-02
CMP820 Copa Airlines 6 2026-06-03
CMP479 Copa Airlines 6 2026-05-20
CMP253 - 6 2026-06-18
CMP149 - 6 2026-07-04
CMP138 - 6 2026-07-03
CMP122 Copa Airlines 6 2026-07-07
CMP746 Copa Airlines 5 2026-06-03
CMP884 - 4 2026-07-12
CMP477 Copa Airlines 4 2026-06-11
CMP451 - 4 2026-07-12
CMP450 - 4 2026-07-12
CMP446 Copa Airlines 4 2026-05-20
CMP801 Copa Airlines 3 2026-04-27
CMP445 - 3 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
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
2026-07-05 CMP441 - Jul 5, 19:45 UTCJul 6, 02:15 UTC6h 30m
2026-07-04 CMP361 - Jul 4, 22:40 UTCJul 5, 16:25 UTC17h 45m
2026-07-04 CMP149 - Jul 4, 07:45 UTCJul 4, 14:40 UTC6h 55m
2026-07-03 CMP138 CUN → MEX Jul 3, 17:05 UTCJul 4, 00:30 UTC7h 25m
2026-07-03 CMP122 PTY → CUN Jul 3, 01:20 UTCJul 3, 15:15 UTC13h 55m
2026-07-02 CMP122 PTY → CUN Jul 2, 17:40 UTCJul 3, 15:15 UTC21h 35m
2026-07-02 CMP734 - Jul 2, 13:35 UTCJul 3, 09:15 UTC19h 40m
2026-07-01 CMP6217 - Jul 1, 23:05 UTCJul 2, 18:00 UTC18h 55m
2026-07-01 CMP6217 - Jul 1, 21:00 UTCJul 2, 18:00 UTC21h 0m
2026-07-01 CMP312 BOS → PTY Jul 1, 15:35 UTCJul 2, 13:50 UTC22h 15m
2026-07-01 CMP312 BOS → PTY Jul 1, 13:35 UTCJul 2, 13:30 UTC23h 55m
2026-07-01 CMP312 BOS → PTY Jul 1, 12:50 UTCJul 1, 23:05 UTC10h 15m
2026-06-30 CMP366 - Jun 30, 16:15 UTCJul 1, 02:40 UTC10h 25m
2026-06-29 CMP188 - Jun 29, 18:19 UTCJun 30, 04:05 UTC9h 45m
2026-06-29 CMP805 PTY → MCO Jun 29, 07:40 UTCJun 29, 15:54 UTC8h 15m
2026-06-28 CMP138 - Jun 28, 17:04 UTCJun 29, 01:20 UTC8h 15m
2026-06-28 CMP889 PTY → POP Jun 28, 14:54 UTCJun 28, 15:05 UTC10m
2026-06-27 CMP433 - Jun 27, 12:45 UTCJun 27, 14:29 UTC1h 45m
2026-06-27 CMP441 - Jun 27, 01:59 UTCJun 27, 02:20 UTC20m
2026-06-27 CMP441 - Jun 27, 00:20 UTCJun 27, 00:44 UTC25m
2026-06-24 CMP123 - Jun 24, 16:59 UTCJun 25, 09:10 UTC16h 10m
2026-06-24 CMP122 PTY → CUN Jun 24, 13:30 UTCJun 24, 15:09 UTC1h 40m
2026-06-23 CMP122 PTY → CUN Jun 23, 17:34 UTCJun 24, 15:09 UTC21h 35m
2026-06-23 CMP123 CUN → CUN Jun 23, 17:04 UTCJun 24, 15:09 UTC22h 5m
2026-06-23 CMP619 ORD → CUN Jun 23, 06:19 UTCJun 23, 15:40 UTC9h 20m
2026-06-23 CMP119 YYZ → ORD Jun 23, 02:55 UTCJun 23, 04:05 UTC1h 10m
2026-06-23 CMP119 - Jun 23, 00:35 UTCJun 23, 01:15 UTC40m
2026-06-22 CMP119 - Jun 22, 15:50 UTCJun 23, 00:30 UTC8h 40m
2026-06-22 CMP723 - Jun 22, 01:35 UTCJun 22, 14:24 UTC12h 50m
2026-06-21 CMP723 - Jun 21, 12:55 UTCJun 22, 09:34 UTC20h 40m
2026-06-21 CMP268 - Jun 21, 02:20 UTCJun 21, 02:30 UTC10m

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 12h ago.
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.