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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 Jul 26, 14:20 UTC
Flights observed
210
Distinct callsigns
11
Country
CO
Last broadcast
Jul 26, 14:20 UTC

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 11 distinct

Callsign Airline Flights Last seen
SLM431 Surinam Airways 73 2026-07-24
SLM421 Surinam Airways 70 2026-07-25
SLM422 Surinam Airways 32 2026-07-25
SLM432 - 9 2026-06-23
SLM632 Surinam Airways 8 2026-05-22
SLM631 Surinam Airways 6 2026-05-21
SLM332 Surinam Airways 4 2026-07-26
SLM481 Surinam Airways 3 2026-05-23
SLM331 Surinam Airways 3 2026-07-26
SLM9916 - 1 2026-06-14
SLM482 Surinam Airways 1 2026-05-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SLM332 BGI → GEO Jul 26, 14:05 UTCJul 26, 14:20 UTC15m
2026-07-26 SLM331 PBM → GEO Jul 26, 12:35 UTCJul 26, 12:50 UTC15m
2026-07-25 SLM422 MIA → GEO Jul 25, 18:10 UTCJul 25, 21:45 UTC3h 35m
2026-07-25 SLM421 GEO → MIA Jul 25, 11:45 UTCJul 25, 15:55 UTC4h 10m
2026-07-24 SLM421 GEO → MIA Jul 24, 16:05 UTCJul 25, 13:30 UTC21h 25m
2026-07-24 SLM431 PBM → AUA Jul 24, 13:10 UTCJul 24, 13:20 UTC10m
2026-07-23 SLM422 MIA → GEO Jul 23, 17:35 UTCJul 24, 11:50 UTC18h 15m
2026-07-22 SLM421 GEO → MIA Jul 22, 22:50 UTCJul 23, 15:00 UTC16h 10m
2026-07-22 SLM331 PBM → GEO Jul 22, 21:30 UTCJul 22, 21:50 UTC20m
2026-07-22 SLM431 PBM → AUA Jul 22, 15:50 UTCJul 22, 16:30 UTC40m
2026-07-22 SLM431 PBM → AUA Jul 22, 13:15 UTCJul 22, 13:25 UTC10m
2026-07-21 SLM422 MIA → GEO Jul 21, 17:35 UTCJul 22, 12:00 UTC18h 25m
2026-07-21 SLM421 GEO → MIA Jul 21, 11:20 UTCJul 21, 15:05 UTC3h 45m
2026-07-20 SLM421 GEO → MIA Jul 20, 15:50 UTCJul 21, 14:45 UTC22h 54m
2026-07-20 SLM431 PBM → AUA Jul 20, 13:05 UTCJul 20, 13:15 UTC10m
2026-07-20 SLM431 PBM → AUA Jul 20, 11:20 UTCJul 20, 11:35 UTC15m
2026-07-20 SLM431 PBM → AUA Jul 20, 09:55 UTCJul 20, 10:40 UTC45m
2026-07-19 SLM431 PBM → AUA Jul 19, 13:50 UTCJul 20, 10:40 UTC20h 50m
2026-07-18 SLM422 MIA → GEO Jul 18, 17:25 UTCJul 19, 12:30 UTC19h 5m
2026-07-18 SLM421 GEO → MIA Jul 18, 11:15 UTCJul 18, 15:00 UTC3h 45m
2026-07-17 SLM431 - Jul 17, 15:29 UTCJul 18, 12:45 UTC21h 16m
2026-07-17 SLM431 - Jul 17, 13:00 UTCJul 17, 13:10 UTC10m
2026-07-16 SLM422 - Jul 16, 17:40 UTCJul 17, 11:45 UTC18h 5m
2026-07-15 SLM421 - Jul 15, 22:35 UTCJul 16, 14:55 UTC16h 20m
2026-07-15 SLM431 - Jul 15, 15:30 UTCJul 15, 21:45 UTC6h 15m
2026-07-15 SLM431 - Jul 15, 12:50 UTCJul 15, 13:05 UTC15m
2026-07-14 SLM431 - Jul 14, 17:20 UTCJul 15, 11:40 UTC18h 19m
2026-07-14 SLM421 - Jul 14, 10:55 UTCJul 14, 14:40 UTC3h 45m
2026-07-13 SLM421 - Jul 13, 16:50 UTCJul 14, 14:40 UTC21h 50m
2026-07-13 SLM421 - Jul 13, 16:35 UTCJul 14, 14:40 UTC22h 5m
2026-07-13 SLM431 - Jul 13, 14:05 UTCJul 13, 14:15 UTC10m
2026-07-13 SLM431 - Jul 13, 11:25 UTCJul 13, 13:10 UTC1h 45m
2026-07-12 SLM332 - Jul 12, 13:45 UTCJul 12, 14:01 UTC15m
2026-07-11 SLM422 - Jul 11, 18:20 UTCJul 12, 12:30 UTC18h 10m
2026-07-11 SLM421 - Jul 11, 11:50 UTCJul 11, 15:35 UTC3h 45m
2026-07-10 SLM431 - Jul 10, 15:45 UTCJul 11, 12:35 UTC20h 51m
2026-07-10 SLM431 - Jul 10, 13:00 UTCJul 10, 13:10 UTC10m
2026-07-09 SLM422 - Jul 9, 17:55 UTCJul 10, 11:55 UTC18h 0m
2026-07-08 SLM421 - Jul 8, 22:40 UTCJul 9, 15:35 UTC16h 55m
2026-07-08 SLM431 - Jul 8, 15:15 UTCJul 8, 21:50 UTC6h 35m
2026-07-08 SLM431 - Jul 8, 12:45 UTCJul 8, 12:55 UTC10m
2026-07-07 SLM422 - Jul 7, 17:30 UTCJul 8, 11:45 UTC18h 15m
2026-07-07 SLM421 - Jul 7, 11:10 UTCJul 7, 14:55 UTC3h 45m
2026-07-06 SLM421 - Jul 6, 15:30 UTCJul 7, 12:45 UTC21h 15m
2026-07-06 SLM431 - Jul 6, 10:20 UTCJul 6, 12:00 UTC1h 40m
2026-07-05 SLM431 - Jul 5, 13:40 UTCJul 6, 12:00 UTC22h 20m
2026-07-04 SLM422 - Jul 4, 17:30 UTCJul 5, 12:30 UTC19h 0m
2026-07-04 SLM421 - Jul 4, 11:15 UTCJul 4, 15:00 UTC3h 45m
2026-07-03 SLM421 - Jul 3, 15:45 UTCJul 4, 14:45 UTC23h 0m
2026-07-03 SLM431 - Jul 3, 13:00 UTCJul 3, 13:10 UTC10m

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 Jul 26, 14:20 UTC.
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 11 distinct callsigns, including SLM431, SLM421, SLM422, SLM432, SLM632.