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sensors Mode-S transponder

0B437D

ICAO 24-bit transponder address · allocated to Nicaragua

Hex
0B437D
Octal
02641575
Decimal
738,173
Country
NI
No current signal · last broadcast 7h ago
Flights observed
198
Distinct callsigns
1
Country
NI
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S 0B437D.

Country allocation

The ICAO 24-bit address 0B437D falls within the block assigned to Nicaragua (NI) by ICAO Annex 10, Volume III. Every aircraft registered in Nicaragua 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 1 distinct

Callsign Airline Flights Last seen
TGKEI - 198 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 TGKEI - Jul 17, 22:55 UTCJul 17, 23:05 UTC10m
2026-07-17 TGKEI - Jul 17, 22:10 UTCJul 17, 22:35 UTC25m
2026-07-17 TGKEI - Jul 17, 20:00 UTCJul 17, 20:55 UTC55m
2026-07-17 TGKEI - Jul 17, 17:35 UTCJul 17, 17:50 UTC15m
2026-07-16 TGKEI - Jul 16, 19:45 UTCJul 16, 20:05 UTC20m
2026-07-16 TGKEI - Jul 16, 17:45 UTCJul 16, 17:54 UTC10m
2026-07-15 TGKEI - Jul 15, 20:50 UTCJul 15, 21:15 UTC25m
2026-07-15 TGKEI - Jul 15, 16:40 UTCJul 15, 16:50 UTC10m
2026-07-13 TGKEI - Jul 13, 15:35 UTCJul 13, 15:45 UTC10m
2026-07-13 TGKEI - Jul 13, 15:10 UTCJul 13, 15:20 UTC10m
2026-07-13 TGKEI - Jul 13, 13:15 UTCJul 13, 13:20 UTC5m
2026-07-11 TGKEI - Jul 11, 21:50 UTCJul 11, 22:20 UTC30m
2026-07-11 TGKEI - Jul 11, 20:45 UTCJul 11, 21:10 UTC25m
2026-07-10 TGKEI - Jul 10, 22:00 UTCJul 10, 22:25 UTC25m
2026-07-10 TGKEI - Jul 10, 13:45 UTCJul 10, 14:15 UTC30m
2026-07-09 TGKEI - Jul 9, 19:25 UTCJul 9, 19:50 UTC25m
2026-07-09 TGKEI - Jul 9, 15:00 UTCJul 9, 15:45 UTC45m
2026-07-09 TGKEI - Jul 9, 13:25 UTCJul 9, 13:30 UTC5m
2026-07-08 TGKEI - Jul 8, 22:20 UTCJul 8, 22:40 UTC20m
2026-07-08 TGKEI - Jul 8, 20:30 UTCJul 8, 20:55 UTC25m
2026-06-30 TGKEI - Jun 30, 00:00 UTCJun 30, 00:25 UTC25m
2026-06-29 TGKEI - Jun 29, 22:19 UTCJun 29, 22:44 UTC25m
2026-06-28 TGKEI - Jun 28, 20:45 UTCJun 28, 21:10 UTC25m
2026-06-28 TGKEI - Jun 28, 19:29 UTCJun 28, 20:04 UTC35m
2026-06-27 TGKEI - Jun 27, 17:34 UTCJun 27, 17:44 UTC10m
2026-06-26 TGKEI - Jun 26, 20:34 UTCJun 26, 20:40 UTC5m
2026-06-26 TGKEI - Jun 26, 00:30 UTCJun 26, 00:39 UTC10m
2026-06-25 TGKEI - Jun 25, 23:09 UTCJun 25, 23:34 UTC25m
2026-06-25 TGKEI - Jun 25, 21:59 UTCJun 25, 22:14 UTC15m
2026-06-25 TGKEI - Jun 25, 20:14 UTCJun 25, 21:10 UTC55m
2026-06-25 TGKEI - Jun 25, 18:50 UTCJun 25, 18:59 UTC10m
2026-06-25 TGKEI - Jun 25, 17:20 UTCJun 25, 17:34 UTC15m
2026-06-25 TGKEI - Jun 25, 15:40 UTCJun 25, 15:44 UTC5m
2026-06-25 TGKEI - Jun 25, 13:29 UTCJun 25, 13:50 UTC20m
2026-06-25 TGKEI - Jun 25, 12:15 UTCJun 25, 12:40 UTC25m
2026-06-24 TGKEI - Jun 24, 18:44 UTCJun 24, 19:04 UTC20m
2026-06-23 TGKEI - Jun 23, 18:55 UTCJun 23, 19:04 UTC10m
2026-06-23 TGKEI - Jun 23, 14:19 UTCJun 23, 14:55 UTC35m
2026-06-22 TGKEI GUA → GUA Jun 22, 23:14 UTCJun 22, 23:24 UTC10m
2026-06-22 TGKEI - Jun 22, 21:40 UTCJun 22, 21:49 UTC10m
2026-06-22 TGKEI - Jun 22, 19:54 UTCJun 22, 20:14 UTC20m
2026-06-19 TGKEI - Jun 19, 16:49 UTCJun 19, 16:59 UTC10m
2026-06-19 TGKEI - Jun 19, 15:44 UTCJun 19, 15:59 UTC15m
2026-06-19 TGKEI - Jun 19, 14:44 UTCJun 19, 14:54 UTC10m
2026-06-19 TGKEI - Jun 19, 13:29 UTCJun 19, 13:39 UTC10m
2026-06-18 TGKEI - Jun 18, 23:30 UTCJun 19, 00:00 UTC30m
2026-06-18 TGKEI - Jun 18, 20:35 UTCJun 18, 20:55 UTC20m
2026-06-18 TGKEI - Jun 18, 17:10 UTCJun 18, 17:35 UTC25m
2026-06-18 TGKEI - Jun 18, 15:35 UTCJun 18, 16:00 UTC25m
2026-06-17 TGKEI - Jun 17, 14:35 UTCJun 17, 14:50 UTC15m

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.

Mode-S 0B437D frequently asked

What is Mode-S code 0B437D?
0B437D is an ICAO 24-bit transponder address. Allocated to Nicaragua.
Where is Mode-S 0B437D registered?
Mode-S code 0B437D is allocated to Nicaragua (NI). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 0B437D broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 0B437D, octal 02641575, decimal 738,173.
What flights does 0B437D operate?
Mode-S 0B437D has broadcast 1 distinct callsign, including TGKEI.