Apparatus

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sensors Mode-S transponder

0C43B1

ICAO 24-bit transponder address · allocated to Dominican Republic

Currently assigned to HI1134 · BOEING 737 MAX 8

Hex
0C43B1
Octal
03041661
Decimal
803,761
Country
DO
Tail
HI1134
Type
B38M
Broadcasting now · callsign DWI6770 · 38,000 ft
Flights observed
4
Distinct callsigns
4
Country
DO
Last broadcast
1d ago

Current position

0C43B1 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 0C43B1 falls within the block assigned to Dominican Republic (DO) by ICAO Annex 10, Volume III. Every aircraft registered in Dominican Republic 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 4 distinct

Callsign Airline Flights Last seen
DWI5421 Arajet 1 2026-04-13
DWI5420 - 1 2026-04-13
DWI501 - 1 2026-04-13
DWI500 - 1 2026-04-13

Recent flights last 4

DateFlightRouteTakeoffLandingDuration
2026-04-13 DWI501 - Apr 13, 21:30 UTCApr 13, 21:50 UTC20m
2026-04-13 DWI500 - Apr 13, 19:25 UTCApr 13, 19:35 UTC10m
2026-04-13 DWI5421 ORD → PUJ Apr 13, 09:40 UTCApr 13, 11:25 UTC1h 45m
2026-04-13 DWI5420 - Apr 13, 00:50 UTCApr 13, 02:50 UTC2h 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 HI1134 page for operator, model, and routing details .

Mode-S 0C43B1 frequently asked

What is Mode-S code 0C43B1?
0C43B1 is an ICAO 24-bit transponder address. Allocated to Dominican Republic. Assigned to HI1134.
Where is Mode-S 0C43B1 registered?
Mode-S code 0C43B1 is allocated to Dominican Republic (DO). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 0C43B1 broadcasting right now?
Yes. Mode-S 0C43B1 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 0C43B1, octal 03041661, decimal 803,761.
What flights does 0C43B1 operate?
Mode-S 0C43B1 has broadcast 4 distinct callsigns, including DWI5421, DWI5420, DWI501, DWI500.