Apparatus

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sensors Mode-S transponder

0C21B7

ICAO 24-bit transponder address · allocated to Suriname

Currently assigned to HP-9809CMP · BOEING 737 MAX 8

Hex
0C21B7
Octal
03020667
Decimal
795,063
Country
SR
Tail
HP-9809CMP
Type
B38M
No current signal · last broadcast 2h ago
Flights observed
234
Distinct callsigns
20
Country
SR
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 0C21B7.

Country allocation

The ICAO 24-bit address 0C21B7 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
CMP752 - 17 2026-07-13
CMP820 Copa Airlines 11 2026-04-29
CMP456 - 9 2026-07-09
CMP753 - 8 2026-06-20
CMP734 - 8 2026-07-05
CMP316 - 7 2026-07-04
CMP857 Copa Airlines 6 2026-05-26
CMP709 Copa Airlines 6 2026-05-25
CMP421 - 6 2026-07-01
CMP205 - 6 2026-07-12
CMP732 Copa Airlines 5 2026-05-26
CMP708 Copa Airlines 5 2026-05-25
CMP317 - 5 2026-07-04
CMP253 - 5 2026-07-10
CMP194 Copa Airlines 5 2026-06-11
CMP821 Copa Airlines 4 2026-04-29
CMP446 - 4 2026-07-09
CMP424 Copa Airlines 4 2026-06-10
CMP423 Copa Airlines 4 2026-06-09
CMP804 - 3 2026-06-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CMP129 - Jul 14, 17:05 UTCJul 14, 17:15 UTC10m
2026-07-13 CMP752 - Jul 13, 21:45 UTCJul 14, 15:15 UTC17h 30m
2026-07-13 CMP752 - Jul 13, 16:30 UTCJul 14, 15:15 UTC22h 45m
2026-07-13 CMP752 - Jul 13, 14:10 UTCJul 14, 10:55 UTC20h 45m
2026-07-13 CMP752 - Jul 13, 10:00 UTCJul 14, 06:40 UTC20h 40m
2026-07-13 CMP752 - Jul 13, 05:55 UTCJul 14, 05:45 UTC23h 50m
2026-07-13 CMP204 - Jul 13, 01:50 UTCJul 14, 01:45 UTC23h 55m
2026-07-12 CMP205 - Jul 12, 23:50 UTCJul 13, 22:20 UTC22h 30m
2026-07-12 CMP205 - Jul 12, 22:30 UTCJul 13, 21:45 UTC23h 15m
2026-07-12 CMP205 - Jul 12, 18:05 UTCJul 13, 16:30 UTC22h 25m
2026-07-12 CMP205 - Jul 12, 15:30 UTCJul 13, 10:20 UTC18h 50m
2026-07-12 CMP205 - Jul 12, 10:25 UTCJul 13, 06:45 UTC20h 20m
2026-07-12 CMP205 - Jul 12, 07:50 UTCJul 13, 06:45 UTC22h 55m
2026-07-12 CMP822 - Jul 12, 06:45 UTCJul 13, 02:25 UTC19h 40m
2026-07-12 CMP773 - Jul 12, 00:25 UTCJul 12, 04:45 UTC4h 20m
2026-07-11 CMP290 - Jul 11, 12:40 UTCJul 11, 18:25 UTC5h 45m
2026-07-11 CMP290 - Jul 11, 09:45 UTCJul 11, 10:10 UTC25m
2026-07-10 CMP291 - Jul 10, 21:50 UTCJul 11, 07:45 UTC9h 55m
2026-07-10 CMP253 - Jul 10, 07:45 UTCJul 10, 18:30 UTC10h 45m
2026-07-09 CMP456 MCO → LAS Jul 9, 19:00 UTCJul 10, 05:20 UTC10h 20m
2026-07-09 CMP446 - Jul 9, 10:25 UTCJul 9, 16:35 UTC6h 10m
2026-07-08 CMP733 - Jul 8, 20:00 UTCJul 8, 20:45 UTC45m
2026-07-07 CMP733 - Jul 7, 23:50 UTCJul 8, 20:45 UTC20h 55m
2026-07-06 CMP411 - Jul 6, 22:05 UTCJul 6, 22:20 UTC15m
2026-07-05 CMP752 - Jul 5, 14:15 UTCJul 6, 09:40 UTC19h 25m
2026-07-05 CMP752 - Jul 5, 06:45 UTCJul 6, 02:55 UTC20h 10m
2026-07-05 CMP734 - Jul 5, 01:50 UTCJul 6, 01:45 UTC23h 55m
2026-07-04 CMP765 - Jul 4, 23:30 UTCJul 5, 17:00 UTC17h 30m
2026-07-04 CMP317 - Jul 4, 16:10 UTCJul 5, 14:15 UTC22h 5m
2026-07-04 CMP316 - Jul 4, 01:10 UTCJul 4, 14:45 UTC13h 35m
2026-07-03 CMP316 - Jul 3, 17:55 UTCJul 4, 14:45 UTC20h 50m
2026-07-03 CMP316 MCO → CUN Jul 3, 16:05 UTCJul 4, 14:45 UTC22h 40m
2026-07-02 CMP285 - Jul 2, 08:35 UTCJul 3, 02:30 UTC17h 55m
2026-07-01 CMP421 - Jul 1, 23:55 UTCJul 2, 19:55 UTC20h 0m
2026-07-01 CMP253 - Jul 1, 08:40 UTCJul 1, 13:45 UTC5h 5m
2026-06-30 CMP456 - Jun 30, 18:45 UTCJul 1, 06:15 UTC11h 30m
2026-06-29 CMP724 - Jun 29, 22:10 UTCJun 30, 16:45 UTC18h 35m
2026-06-29 CMP724 - Jun 29, 19:49 UTCJun 30, 16:45 UTC20h 55m
2026-06-29 CMP724 - Jun 29, 18:34 UTCJun 29, 22:24 UTC3h 50m
2026-06-28 CMP747 GUA → JFK Jun 28, 22:45 UTCJun 29, 16:10 UTC17h 25m
2026-06-28 CMP403 IAD → GUA Jun 28, 06:34 UTCJun 28, 14:45 UTC8h 10m
2026-06-27 CMP448 - Jun 27, 17:25 UTCJun 28, 04:20 UTC10h 55m
2026-06-26 CMP245 - Jun 26, 05:44 UTCJun 26, 09:59 UTC4h 15m
2026-06-24 CMP253 - Jun 24, 07:50 UTCJun 24, 20:14 UTC12h 25m
2026-06-23 CMP456 - Jun 23, 16:05 UTCJun 24, 05:09 UTC13h 5m
2026-06-23 CMP456 - Jun 23, 01:59 UTCJun 24, 01:44 UTC23h 45m
2026-06-23 CMP752 - Jun 23, 01:25 UTCJun 23, 23:44 UTC22h 20m
2026-06-22 CMP752 - Jun 22, 17:04 UTCJun 23, 02:29 UTC9h 25m
2026-06-21 CMP317 - Jun 21, 15:49 UTCJun 21, 17:24 UTC1h 35m
2026-06-20 CMP316 PTY → CUN Jun 20, 23:59 UTCJun 21, 14:30 UTC14h 30m

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-9809CMP page for operator, model, and routing details .

Mode-S 0C21B7 frequently asked

What is Mode-S code 0C21B7?
0C21B7 is an ICAO 24-bit transponder address. Allocated to Suriname. Assigned to HP-9809CMP.
Where is Mode-S 0C21B7 registered?
Mode-S code 0C21B7 is allocated to Suriname (SR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 0C21B7 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 0C21B7, octal 03020667, decimal 795,063.
What flights does 0C21B7 operate?
Mode-S 0C21B7 has broadcast 20 distinct callsigns, including CMP752, CMP820, CMP456, CMP753, CMP734.