Apparatus

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sensors Mode-S transponder

0C8023

ICAO 24-bit transponder address · allocated to Colombia

Currently assigned to PZ-TCV · BOEING 737-800

Hex
0C8023
Octal
03100043
Decimal
819,235
Country
CO
Tail
PZ-TCV
Type
B738
No current signal · last broadcast 9h ago
Flights observed
84
Distinct callsigns
9
Country
CO
Last broadcast
9h ago

Last known position

Most recent position reported by Mode-S 0C8023.

Country allocation

The ICAO 24-bit address 0C8023 falls within the block assigned to Colombia (CO) by ICAO Annex 10, Volume III. Every aircraft registered in Colombia 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 9 distinct

Callsign Airline Flights Last seen
SLM421 Surinam Airways 28 2026-05-28
SLM431 Surinam Airways 23 2026-05-29
SLM422 Surinam Airways 12 2026-05-26
SLM632 Surinam Airways 8 2026-05-22
SLM631 Surinam Airways 6 2026-05-21
SLM481 Surinam Airways 3 2026-05-23
SLM332 - 2 2026-04-15
SLM482 Surinam Airways 1 2026-05-23
SLM331 - 1 2026-04-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 SLM431 PBM → AUA May 29, 16:30 UTCMay 29, 17:15 UTC45m
2026-05-28 SLM431 PBM → AUA May 28, 17:40 UTCMay 29, 11:35 UTC17h 55m
2026-05-28 SLM421 GEO → MIA May 28, 11:20 UTCMay 28, 15:15 UTC3h 55m
2026-05-27 SLM421 GEO → MIA May 27, 19:40 UTCMay 28, 15:15 UTC19h 35m
2026-05-27 SLM431 PBM → AUA May 27, 16:45 UTCMay 27, 16:55 UTC10m
2026-05-27 SLM431 PBM → AUA May 27, 14:00 UTCMay 27, 15:50 UTC1h 50m
2026-05-26 SLM431 PBM → AUA May 26, 19:05 UTCMay 27, 15:50 UTC20h 46m
2026-05-26 SLM422 MIA → GEO May 26, 17:09 UTCMay 26, 17:30 UTC20m
2026-05-26 SLM421 GEO → MIA May 26, 11:09 UTCMay 26, 14:55 UTC3h 45m
2026-05-25 SLM421 GEO → MIA May 25, 15:15 UTCMay 26, 14:45 UTC23h 29m
2026-05-25 SLM431 PBM → AUA May 25, 12:50 UTCMay 25, 13:00 UTC10m
2026-05-25 SLM431 PBM → AUA May 25, 11:35 UTCMay 25, 11:50 UTC15m
2026-05-25 SLM431 PBM → AUA May 25, 10:10 UTCMay 25, 10:55 UTC45m
2026-05-24 SLM422 MIA → GEO May 24, 00:20 UTCMay 24, 03:50 UTC3h 30m
2026-05-23 SLM421 GEO → MIA May 23, 12:30 UTCMay 23, 21:50 UTC9h 20m
2026-05-23 SLM482 CUR → PBM May 23, 08:15 UTCMay 23, 10:35 UTC2h 20m
2026-05-23 SLM481 CUR → MIA May 23, 01:35 UTCMay 23, 04:10 UTC2h 34m
2026-05-22 SLM632 AUA → PBM May 22, 17:55 UTCMay 22, 23:20 UTC5h 25m
2026-05-21 SLM631 PBM → AUA May 21, 17:30 UTCMay 22, 11:15 UTC17h 45m
2026-05-21 SLM421 GEO → MIA May 21, 11:20 UTCMay 21, 15:00 UTC3h 40m
2026-05-20 SLM421 GEO → MIA May 20, 15:40 UTCMay 21, 14:45 UTC23h 5m
2026-05-20 SLM431 PBM → AUA May 20, 13:25 UTCMay 20, 13:35 UTC10m
2026-05-19 SLM422 MIA → GEO May 19, 17:30 UTCMay 20, 12:30 UTC19h 1m
2026-05-19 SLM421 GEO → MIA May 19, 11:05 UTCMay 19, 14:55 UTC3h 50m
2026-05-18 SLM421 GEO → MIA May 18, 15:35 UTCMay 19, 14:45 UTC23h 9m
2026-05-18 SLM431 PBM → AUA May 18, 12:55 UTCMay 18, 13:05 UTC10m
2026-05-18 SLM431 PBM → AUA May 18, 09:55 UTCMay 18, 11:35 UTC1h 40m
2026-05-16 SLM422 MIA → GEO May 16, 17:15 UTCMay 16, 20:45 UTC3h 30m
2026-05-16 SLM421 GEO → MIA May 16, 10:55 UTCMay 16, 14:51 UTC3h 55m
2026-05-15 SLM421 GEO → MIA May 15, 15:30 UTCMay 16, 14:46 UTC23h 16m
2026-05-15 SLM431 PBM → AUA May 15, 13:20 UTCMay 15, 13:30 UTC10m
2026-05-14 SLM422 MIA → GEO May 14, 17:40 UTCMay 15, 11:45 UTC18h 5m
2026-05-14 SLM421 GEO → MIA May 14, 10:50 UTCMay 14, 14:40 UTC3h 50m
2026-05-13 SLM421 GEO → MIA May 13, 15:25 UTCMay 14, 14:40 UTC23h 15m
2026-05-13 SLM431 PBM → AUA May 13, 12:50 UTCMay 13, 13:00 UTC10m
2026-05-12 SLM431 PBM → AUA May 12, 17:05 UTCMay 13, 11:55 UTC18h 50m
2026-05-12 SLM421 GEO → MIA May 12, 10:55 UTCMay 12, 14:50 UTC3h 55m
2026-05-11 SLM421 GEO → MIA May 11, 15:40 UTCMay 12, 14:45 UTC23h 6m
2026-05-11 SLM431 PBM → AUA May 11, 13:25 UTCMay 11, 13:35 UTC10m
2026-05-11 SLM431 PBM → AUA May 11, 10:30 UTCMay 11, 12:20 UTC1h 50m
2026-05-09 SLM422 MIA → GEO May 9, 17:45 UTCMay 9, 21:14 UTC3h 30m
2026-05-09 SLM421 GEO → MIA May 9, 12:05 UTCMay 9, 15:55 UTC3h 50m
2026-05-08 SLM421 GEO → MIA May 8, 15:50 UTCMay 9, 13:50 UTC22h 0m
2026-05-08 SLM431 PBM → AUA May 8, 13:20 UTCMay 8, 13:30 UTC10m
2026-05-07 SLM422 MIA → GEO May 7, 17:15 UTCMay 8, 12:00 UTC18h 45m
2026-05-07 SLM421 GEO → MIA May 7, 10:50 UTCMay 7, 14:50 UTC4h 0m
2026-05-06 SLM421 GEO → MIA May 6, 15:15 UTCMay 7, 14:45 UTC23h 30m
2026-05-06 SLM431 PBM → AUA May 6, 12:50 UTCMay 6, 13:00 UTC10m
2026-05-06 SLM431 PBM → AUA May 6, 11:15 UTCMay 6, 11:35 UTC20m
2026-05-05 SLM422 MIA → GEO May 5, 17:35 UTCMay 6, 10:40 UTC17h 5m

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 PZ-TCV page for operator, model, and routing details .

Mode-S 0C8023 frequently asked

What is Mode-S code 0C8023?
0C8023 is an ICAO 24-bit transponder address. Allocated to Colombia. Assigned to PZ-TCV.
Where is Mode-S 0C8023 registered?
Mode-S code 0C8023 is allocated to Colombia (CO). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 0C8023 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 0C8023, octal 03100043, decimal 819,235.
What flights does 0C8023 operate?
Mode-S 0C8023 has broadcast 9 distinct callsigns, including SLM421, SLM431, SLM422, SLM632, SLM631.