Apparatus

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sensors Mode-S transponder

0C21F7

ICAO 24-bit transponder address · allocated to Suriname

Currently assigned to HP-2011UCG · BOEING 737-300

Hex
0C21F7
Octal
03020767
Decimal
795,127
Country
SR
Tail
HP-2011UCG
Type
B733
No current signal · last broadcast 9h ago
Flights observed
98
Distinct callsigns
19
Country
SR
Last broadcast
9h ago

Last known position

Most recent position reported by Mode-S 0C21F7.

Country allocation

The ICAO 24-bit address 0C21F7 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 19 distinct

Callsign Airline Flights Last seen
UCG470 - 25 2026-07-13
UCG471 - 17 2026-07-17
UCG953 - 7 2026-07-16
UCG472 - 7 2026-07-15
UCG954 Uniworld Air Cargo 6 2026-07-17
UCG253 - 6 2026-05-23
UCG972 - 4 2026-07-17
UCG843 Uniworld Air Cargo 3 2026-04-22
UCG795 - 3 2026-05-30
UCG473 - 3 2026-07-12
UCG247 - 3 2026-05-23
UCG210 Uniworld Air Cargo 3 2026-05-30
UCG970 Uniworld Air Cargo 2 2026-06-11
UCG249 Uniworld Air Cargo 2 2026-05-25
UCG193 - 2 2026-07-09
UCG192 - 2 2026-07-07
UCG974 - 1 2026-04-27
UCG794 - 1 2026-05-16
UCG291 - 1 2026-04-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 UCG471 - Jul 17, 08:49 UTCJul 18, 00:00 UTC15h 10m
2026-07-17 UCG471 - Jul 17, 01:49 UTCJul 18, 00:00 UTC22h 10m
2026-07-17 UCG972 - Jul 17, 01:29 UTCJul 17, 23:45 UTC22h 15m
2026-07-17 UCG954 AUA → CUR Jul 17, 00:10 UTCJul 17, 00:20 UTC10m
2026-07-16 UCG953 - Jul 16, 12:05 UTCJul 16, 12:25 UTC20m
2026-07-15 UCG472 - Jul 15, 18:20 UTCJul 16, 10:50 UTC16h 30m
2026-07-15 UCG471 - Jul 15, 13:05 UTCJul 16, 10:50 UTC21h 45m
2026-07-15 UCG471 - Jul 15, 09:20 UTCJul 15, 22:40 UTC13h 20m
2026-07-14 UCG471 - Jul 14, 20:50 UTCJul 15, 18:40 UTC21h 49m
2026-07-14 UCG471 - Jul 14, 17:10 UTCJul 15, 13:30 UTC20h 19m
2026-07-14 UCG471 - Jul 14, 12:40 UTCJul 15, 09:40 UTC20h 59m
2026-07-14 UCG471 - Jul 14, 08:55 UTCJul 14, 21:10 UTC12h 15m
2026-07-13 UCG470 - Jul 13, 13:05 UTCJul 14, 09:15 UTC20h 10m
2026-07-12 UCG473 - Jul 12, 17:55 UTCJul 13, 13:25 UTC19h 30m
2026-07-12 UCG472 - Jul 12, 14:20 UTCJul 13, 13:25 UTC23h 5m
2026-07-12 UCG470 - Jul 12, 05:55 UTCJul 12, 18:20 UTC12h 25m
2026-07-11 UCG473 - Jul 11, 22:20 UTCJul 12, 18:20 UTC20h 0m
2026-07-11 UCG473 - Jul 11, 18:25 UTCJul 12, 14:40 UTC20h 15m
2026-07-11 UCG471 - Jul 11, 13:00 UTCJul 12, 09:55 UTC20h 55m
2026-07-11 UCG470 - Jul 11, 09:00 UTCJul 12, 06:15 UTC21h 15m
2026-07-10 UCG470 - Jul 10, 17:50 UTCJul 11, 13:15 UTC19h 25m
2026-07-10 UCG470 - Jul 10, 14:20 UTCJul 11, 09:25 UTC19h 6m
2026-07-10 UCG470 - Jul 10, 09:50 UTCJul 11, 09:25 UTC23h 35m
2026-07-10 UCG972 - Jul 10, 01:35 UTCJul 10, 18:10 UTC16h 35m
2026-07-10 UCG954 - Jul 10, 00:15 UTCJul 10, 00:25 UTC10m
2026-07-09 UCG953 CUR → AUA Jul 9, 12:10 UTCJul 9, 12:25 UTC15m
2026-07-09 UCG193 - Jul 9, 03:25 UTCJul 9, 11:05 UTC7h 40m
2026-07-07 UCG192 - Jul 7, 14:05 UTCJul 7, 14:30 UTC25m
2026-07-04 UCG470 - Jul 4, 08:20 UTCJul 4, 19:35 UTC11h 15m
2026-07-03 UCG470 - Jul 3, 18:55 UTCJul 4, 16:05 UTC21h 10m
2026-07-03 UCG470 - Jul 3, 14:50 UTCJul 4, 12:40 UTC21h 50m
2026-07-03 UCG470 - Jul 3, 09:55 UTCJul 4, 08:40 UTC22h 45m
2026-07-03 UCG472 - Jul 3, 01:50 UTCJul 3, 19:15 UTC17h 25m
2026-07-03 UCG954 - Jul 3, 00:05 UTCJul 3, 00:15 UTC10m
2026-07-02 UCG953 CUR → AUA Jul 2, 12:10 UTCJul 2, 12:25 UTC15m
2026-06-30 UCG470 PTY → PTY Jun 30, 12:45 UTCJun 30, 16:50 UTC4h 5m
2026-06-29 UCG471 - Jun 29, 16:39 UTCJun 30, 13:05 UTC20h 26m
2026-06-29 UCG470 PTY → PTY Jun 29, 12:49 UTCJun 29, 16:59 UTC4h 10m
2026-06-28 UCG470 PTY → PTY Jun 28, 21:04 UTCJun 29, 16:59 UTC19h 55m
2026-06-28 UCG472 - Jun 28, 17:19 UTCJun 29, 13:14 UTC19h 55m
2026-06-28 UCG472 - Jun 28, 09:30 UTCJun 28, 21:24 UTC11h 55m
2026-06-26 UCG470 PTY → PTY Jun 26, 15:54 UTCJun 26, 20:04 UTC4h 10m
2026-06-25 UCG471 - Jun 25, 12:54 UTCJun 25, 16:55 UTC4h 0m
2026-06-24 UCG471 - Jun 24, 17:14 UTCJun 25, 13:09 UTC19h 55m
2026-06-24 UCG471 - Jun 24, 13:05 UTCJun 24, 17:34 UTC4h 30m
2026-06-23 UCG471 - Jun 23, 16:50 UTCJun 24, 13:20 UTC20h 30m
2026-06-23 UCG470 PTY → PTY Jun 23, 12:55 UTCJun 23, 17:15 UTC4h 20m
2026-06-22 UCG470 PTY → PTY Jun 22, 16:45 UTCJun 23, 13:15 UTC20h 30m
2026-06-22 UCG470 PTY → PTY Jun 22, 13:05 UTCJun 22, 17:04 UTC4h 0m
2026-06-20 UCG470 PTY → PTY Jun 20, 13:34 UTCJun 20, 17:54 UTC4h 20m

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-2011UCG page for operator, model, and routing details .

Mode-S 0C21F7 frequently asked

What is Mode-S code 0C21F7?
0C21F7 is an ICAO 24-bit transponder address. Allocated to Suriname. Assigned to HP-2011UCG.
Where is Mode-S 0C21F7 registered?
Mode-S code 0C21F7 is allocated to Suriname (SR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 0C21F7 broadcasting right now?
No active broadcast right now. Last signal was 9h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 0C21F7, octal 03020767, decimal 795,127.
What flights does 0C21F7 operate?
Mode-S 0C21F7 has broadcast 19 distinct callsigns, including UCG470, UCG471, UCG953, UCG472, UCG954.