Apparatus

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sensors Mode-S transponder

0C21A7

ICAO 24-bit transponder address · allocated to Suriname

Currently assigned to HP-9805CMP · BOEING 737 MAX 8

Hex
0C21A7
Octal
03020647
Decimal
795,047
Country
SR
Tail
HP-9805CMP
Type
B38M
Broadcasting now · callsign CMP205 · 33,000 ft
Flights observed
190
Distinct callsigns
20
Country
SR
Last broadcast
58m ago

Current position

0C21A7 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 0C21A7 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 - 15 2026-06-28
CMP723 Copa Airlines 7 2026-05-19
CMP476 - 7 2026-07-10
CMP424 - 7 2026-06-21
CMP423 - 7 2026-06-20
CMP477 - 6 2026-07-11
CMP858 Copa Airlines 5 2026-06-07
CMP857 Copa Airlines 5 2026-06-08
CMP820 Copa Airlines 5 2026-06-06
CMP708 - 5 2026-07-04
CMP113 Copa Airlines 5 2026-05-26
CMP765 Copa Airlines 4 2026-05-12
CMP709 - 4 2026-07-04
CMP450 - 4 2026-07-02
CMP867 Copa Airlines 3 2026-07-02
CMP732 - 3 2026-07-05
CMP456 - 3 2026-07-08
CMP451 - 3 2026-07-01
CMP432 - 3 2026-06-28
CMP420 - 3 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 CMP205 - Jul 13, 08:55 UTCJul 14, 01:45 UTC16h 50m
2026-07-13 CMP420 - Jul 13, 00:10 UTCJul 13, 23:45 UTC23h 35m
2026-07-12 CMP420 - Jul 12, 17:25 UTCJul 13, 15:40 UTC22h 15m
2026-07-12 CMP420 - Jul 12, 10:15 UTCJul 13, 09:45 UTC23h 30m
2026-07-11 CMP460 - Jul 11, 17:40 UTCJul 12, 00:30 UTC6h 50m
2026-07-11 CMP477 - Jul 11, 04:50 UTCJul 11, 12:50 UTC8h 0m
2026-07-10 CMP476 GUA → DEN Jul 10, 15:00 UTCJul 11, 00:45 UTC9h 46m
2026-07-09 CMP496 - Jul 9, 21:30 UTCJul 10, 04:50 UTC7h 20m
2026-07-09 CMP253 - Jul 9, 07:45 UTCJul 9, 18:20 UTC10h 35m
2026-07-08 CMP456 - Jul 8, 23:55 UTCJul 9, 05:20 UTC5h 25m
2026-07-07 CMP464 - Jul 7, 23:05 UTCJul 7, 23:15 UTC10m
2026-07-07 CMP128 - Jul 7, 19:45 UTCJul 7, 19:55 UTC10m
2026-07-07 CMP253 - Jul 7, 07:50 UTCJul 7, 12:50 UTC5h 0m
2026-07-06 CMP456 - Jul 6, 23:55 UTCJul 7, 05:30 UTC5h 35m
2026-07-05 CMP732 - Jul 5, 15:40 UTCJul 6, 08:35 UTC16h 55m
2026-07-04 CMP709 - Jul 4, 23:50 UTCJul 5, 18:15 UTC18h 25m
2026-07-04 CMP709 - Jul 4, 21:50 UTCJul 5, 18:15 UTC20h 25m
2026-07-04 CMP709 - Jul 4, 21:20 UTCJul 5, 18:15 UTC20h 55m
2026-07-04 CMP708 - Jul 4, 15:45 UTCJul 4, 19:25 UTC3h 40m
2026-07-03 CMP708 - Jul 3, 20:35 UTCJul 4, 19:25 UTC22h 50m
2026-07-03 CMP708 - Jul 3, 17:55 UTCJul 4, 17:45 UTC23h 50m
2026-07-03 CMP897 - Jul 3, 08:20 UTCJul 3, 21:00 UTC12h 40m
2026-07-02 CMP868 - Jul 2, 19:40 UTCJul 3, 06:25 UTC10h 45m
2026-07-02 CMP867 PTY → MCO Jul 2, 09:45 UTCJul 2, 17:40 UTC7h 55m
2026-07-02 CMP450 - Jul 2, 02:10 UTCJul 2, 02:20 UTC10m
2026-07-01 CMP451 - Jul 1, 09:55 UTCJul 1, 10:05 UTC10m
2026-07-01 CMP450 - Jul 1, 02:10 UTCJul 1, 02:20 UTC10m
2026-06-30 CMP241 PTY → PUJ Jun 30, 16:10 UTCJun 30, 18:45 UTC2h 35m
2026-06-28 CMP734 - Jun 28, 16:45 UTCJun 29, 09:25 UTC16h 40m
2026-06-28 CMP432 - Jun 28, 04:15 UTCJun 28, 06:10 UTC1h 55m
2026-06-27 CMP432 - Jun 27, 09:50 UTCJun 28, 06:10 UTC20h 20m
2026-06-27 CMP432 - Jun 27, 05:49 UTCJun 28, 05:45 UTC23h 55m
2026-06-26 CMP440 MIA → PTY Jun 26, 16:44 UTCJun 27, 09:44 UTC17h 0m
2026-06-25 CMP295 YYZ → MIA Jun 25, 19:20 UTCJun 26, 05:24 UTC10h 5m
2026-06-25 CMP887 YYZ → YYZ Jun 25, 04:20 UTCJun 25, 17:20 UTC13h 0m
2026-06-25 CMP610 JFK → YYZ Jun 25, 01:24 UTCJun 25, 02:35 UTC1h 10m
2026-06-24 CMP610 - Jun 24, 12:40 UTCJun 24, 22:35 UTC9h 55m
2026-06-23 CMP194 - Jun 23, 22:19 UTCJun 24, 05:59 UTC7h 40m
2026-06-23 CMP265 PTY → FLL Jun 23, 18:04 UTCJun 23, 20:15 UTC2h 10m
2026-06-22 CMP265 PTY → FLL Jun 22, 22:19 UTCJun 23, 20:15 UTC21h 55m
2026-06-22 CMP421 - Jun 22, 08:25 UTCJun 22, 22:19 UTC13h 55m
2026-06-21 CMP421 - Jun 21, 13:54 UTCJun 22, 09:14 UTC19h 20m
2026-06-21 CMP424 - Jun 21, 04:30 UTCJun 21, 18:29 UTC14h 0m
2026-06-20 CMP423 - Jun 20, 09:24 UTCJun 21, 03:00 UTC17h 35m
2026-06-20 CMP423 - Jun 20, 05:49 UTCJun 21, 03:00 UTC21h 10m
2026-06-20 CMP423 - Jun 20, 05:34 UTCJun 21, 03:00 UTC21h 25m
2026-06-18 CMP807 - Jun 18, 06:35 UTCJun 18, 17:30 UTC10h 55m
2026-06-17 CMP736 PTY → JFK Jun 17, 14:20 UTCJun 18, 02:30 UTC12h 10m
2026-06-15 CMP734 - Jun 15, 20:54 UTCJun 16, 13:19 UTC16h 25m
2026-06-15 CMP734 - Jun 15, 17:20 UTCJun 16, 13:19 UTC20h 0m

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-9805CMP page for operator, model, and routing details .

Mode-S 0C21A7 frequently asked

What is Mode-S code 0C21A7?
0C21A7 is an ICAO 24-bit transponder address. Allocated to Suriname. Assigned to HP-9805CMP.
Where is Mode-S 0C21A7 registered?
Mode-S code 0C21A7 is allocated to Suriname (SR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 0C21A7 broadcasting right now?
Yes. Mode-S 0C21A7 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 0C21A7, octal 03020647, decimal 795,047.
What flights does 0C21A7 operate?
Mode-S 0C21A7 has broadcast 20 distinct callsigns, including CMP734, CMP723, CMP476, CMP424, CMP423.