sensors Mode-S transponder

0C21B6

ICAO 24-bit transponder address · allocated to Suriname

Currently assigned to HP-9808CMP · BOEING 737 MAX 8

Hex
0C21B6
Octal
03020666
Decimal
795,062
Country
SR
Tail
HP-9808CMP
Type
B38M
No current signal · last broadcast 6h ago
Flights observed
210
Distinct callsigns
20
Country
SR
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S 0C21B6.

Country allocation

The ICAO 24-bit address 0C21B6 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
CMP820 Copa Airlines 17 2026-06-07
CMP366 - 10 2026-07-10
CMP753 Copa Airlines 7 2026-06-09
CMP734 Copa Airlines 7 2026-06-10
CMP752 - 6 2026-07-12
CMP733 Copa Airlines 6 2026-06-09
CMP312 - 6 2026-07-11
CMP866 Copa Airlines 5 2026-05-23
CMP765 Copa Airlines 5 2026-05-16
CMP195 Copa Airlines 5 2026-06-18
CMP194 - 5 2026-06-17
CMP821 Copa Airlines 4 2026-06-04
CMP760 - 4 2026-07-13
CMP477 Copa Airlines 4 2026-05-07
CMP456 - 4 2026-06-13
CMP450 - 4 2026-07-14
CMP420 Copa Airlines 4 2026-05-29
CMP253 Copa Airlines 4 2026-06-14
CMP229 - 4 2026-06-30
CMP122 Copa Airlines 4 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CMP450 - Jul 14, 02:00 UTCJul 14, 02:10 UTC10m
2026-07-13 CMP760 - Jul 13, 18:50 UTCJul 13, 19:35 UTC45m
2026-07-12 CMP752 - Jul 12, 22:00 UTCJul 13, 16:55 UTC18h 55m
2026-07-12 CMP752 - Jul 12, 17:55 UTCJul 13, 16:55 UTC23h 0m
2026-07-12 CMP752 - Jul 12, 17:01 UTCJul 13, 11:10 UTC18h 10m
2026-07-11 CMP122 PTY → CUN Jul 11, 23:15 UTCJul 12, 15:50 UTC16h 35m
2026-07-11 CMP122 PTY → CUN Jul 11, 15:35 UTCJul 12, 15:30 UTC23h 55m
2026-07-11 CMP312 - Jul 11, 13:35 UTCJul 12, 09:00 UTC19h 25m
2026-07-11 CMP312 - Jul 11, 13:05 UTCJul 12, 09:00 UTC19h 55m
2026-07-10 CMP366 - Jul 10, 10:00 UTCJul 11, 02:40 UTC16h 40m
2026-07-10 CMP366 - Jul 10, 05:45 UTCJul 11, 02:40 UTC20h 55m
2026-07-09 CMP705 - Jul 9, 23:35 UTCJul 10, 22:35 UTC23h 0m
2026-07-09 CMP705 - Jul 9, 21:05 UTCJul 10, 10:20 UTC13h 15m
2026-07-09 CMP704 PTY → BOS Jul 9, 04:15 UTCJul 9, 18:30 UTC14h 15m
2026-07-07 CMP433 - Jul 7, 12:50 UTCJul 7, 18:15 UTC5h 25m
2026-07-06 CMP441 - Jul 6, 18:50 UTCJul 7, 02:25 UTC7h 35m
2026-07-06 CMP424 - Jul 6, 04:20 UTCJul 6, 16:55 UTC12h 35m
2026-07-05 CMP312 BOS → PTY Jul 5, 13:35 UTCJul 6, 03:00 UTC13h 25m
2026-07-04 CMP366 - Jul 4, 05:35 UTCJul 5, 02:55 UTC21h 20m
2026-07-04 CMP366 - Jul 4, 01:35 UTCJul 5, 01:30 UTC23h 55m
2026-07-04 CMP752 - Jul 4, 01:25 UTCJul 4, 17:35 UTC16h 10m
2026-07-03 CMP752 - Jul 3, 16:55 UTCJul 4, 15:10 UTC22h 15m
2026-07-03 CMP424 - Jul 3, 04:35 UTCJul 3, 15:10 UTC10h 35m
2026-07-02 CMP312 BOS → PTY Jul 2, 13:05 UTCJul 3, 03:05 UTC14h 0m
2026-07-01 CMP366 - Jul 1, 11:20 UTCJul 2, 02:40 UTC15h 20m
2026-07-01 CMP366 - Jul 1, 04:30 UTCJul 2, 02:40 UTC22h 10m
2026-07-01 CMP366 - Jul 1, 01:35 UTCJul 2, 01:30 UTC23h 55m
2026-06-30 CMP229 - Jun 30, 21:10 UTCJul 1, 11:45 UTC14h 35m
2026-06-30 CMP228 - Jun 30, 06:35 UTCJun 30, 19:15 UTC12h 40m
2026-06-29 CMP813 PTY → JFK Jun 29, 17:59 UTCJun 29, 22:00 UTC4h 0m
2026-06-28 CMP813 PTY → JFK Jun 28, 23:34 UTCJun 29, 22:00 UTC22h 25m
2026-06-28 CMP813 PTY → JFK Jun 28, 21:34 UTCJun 29, 21:30 UTC23h 55m
2026-06-28 CMP709 - Jun 28, 21:14 UTCJun 29, 19:29 UTC22h 15m
2026-06-28 CMP708 - Jun 28, 04:29 UTCJun 28, 19:09 UTC14h 40m
2026-06-27 CMP423 - Jun 27, 13:49 UTCJun 28, 02:54 UTC13h 5m
2026-06-26 CMP868 MCO → PTY Jun 26, 21:35 UTCJun 27, 18:15 UTC20h 40m
2026-06-26 CMP868 MCO → PTY Jun 26, 19:35 UTCJun 27, 18:15 UTC22h 40m
2026-06-26 CMP867 PTY → MCO Jun 26, 15:10 UTCJun 26, 17:40 UTC2h 30m
2026-06-24 CMP126 - Jun 24, 23:45 UTCJun 25, 07:54 UTC8h 10m
2026-06-24 CMP451 - Jun 24, 09:55 UTCJun 24, 10:04 UTC10m
2026-06-24 CMP450 - Jun 24, 02:05 UTCJun 24, 02:15 UTC10m
2026-06-22 CMP451 - Jun 22, 09:49 UTCJun 22, 10:05 UTC15m
2026-06-22 CMP450 - Jun 22, 02:04 UTCJun 22, 02:14 UTC10m
2026-06-21 CMP410 PTY → SAL Jun 21, 19:29 UTCJun 22, 01:10 UTC5h 40m
2026-06-21 CMP419 - Jun 21, 14:24 UTCJun 21, 16:19 UTC1h 55m
2026-06-20 CMP419 - Jun 20, 20:00 UTCJun 21, 16:19 UTC20h 20m
2026-06-20 CMP806 MCO → PTY Jun 20, 17:59 UTCJun 21, 16:19 UTC22h 20m
2026-06-20 CMP805 PTY → MCO Jun 20, 07:59 UTCJun 20, 15:49 UTC7h 50m
2026-06-19 CMP709 - Jun 19, 21:04 UTCJun 20, 05:24 UTC8h 20m
2026-06-19 CMP708 PTY → BWI Jun 19, 15:19 UTCJun 19, 19:09 UTC3h 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-9808CMP page for operator, model, and routing details .

Mode-S 0C21B6 frequently asked

What is Mode-S code 0C21B6?
0C21B6 is an ICAO 24-bit transponder address. Allocated to Suriname. Assigned to HP-9808CMP.
Where is Mode-S 0C21B6 registered?
Mode-S code 0C21B6 is allocated to Suriname (SR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 0C21B6 broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 0C21B6, octal 03020666, decimal 795,062.
What flights does 0C21B6 operate?
Mode-S 0C21B6 has broadcast 20 distinct callsigns, including CMP820, CMP366, CMP753, CMP734, CMP752.