Apparatus

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sensors Mode-S transponder

A5988D

ICAO 24-bit transponder address · allocated to United States

Hex
A5988D
Octal
51314215
Decimal
10,852,493
Country
US
No current signal · last broadcast 1h ago
Flights observed
259
Distinct callsigns
1
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A5988D.

Country allocation

The ICAO 24-bit address A5988D falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States 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
N46PF - 259 2026-06-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-24 N46PF - Jun 24, 02:34 UTCJun 24, 03:15 UTC40m
2026-06-24 N46PF - Jun 24, 00:05 UTCJun 24, 01:14 UTC1h 10m
2026-06-23 N46PF - Jun 23, 20:59 UTCJun 23, 22:25 UTC1h 25m
2026-06-23 N46PF - Jun 23, 19:24 UTCJun 23, 20:10 UTC45m
2026-06-23 N46PF - Jun 23, 16:35 UTCJun 23, 17:39 UTC1h 5m
2026-06-23 N46PF - Jun 23, 02:29 UTCJun 23, 03:49 UTC1h 20m
2026-06-22 N46PF - Jun 22, 23:14 UTCJun 23, 00:54 UTC1h 40m
2026-06-22 N46PF - Jun 22, 20:44 UTCJun 22, 21:45 UTC1h 0m
2026-06-22 N46PF - Jun 22, 18:35 UTCJun 22, 19:40 UTC1h 5m
2026-06-22 N46PF - Jun 22, 03:10 UTCJun 22, 03:30 UTC20m
2026-06-22 N46PF - Jun 22, 01:44 UTCJun 22, 02:14 UTC30m
2026-06-22 N46PF - Jun 22, 00:29 UTCJun 22, 01:00 UTC30m
2026-06-21 N46PF - Jun 21, 23:34 UTCJun 21, 23:44 UTC10m
2026-06-21 N46PF - Jun 21, 19:45 UTCJun 21, 20:45 UTC1h 0m
2026-06-21 N46PF - Jun 21, 04:34 UTCJun 21, 05:15 UTC40m
2026-06-21 N46PF - Jun 21, 02:35 UTCJun 21, 02:50 UTC15m
2026-06-21 N46PF - Jun 21, 01:35 UTCJun 21, 01:55 UTC20m
2026-06-20 N46PF - Jun 20, 23:50 UTCJun 21, 00:49 UTC1h 0m
2026-06-20 N46PF HHI → HNL Jun 20, 22:30 UTCJun 20, 22:50 UTC20m
2026-06-20 N46PF - Jun 20, 21:34 UTCJun 20, 21:44 UTC10m
2026-06-20 N46PF - Jun 20, 18:54 UTCJun 20, 20:20 UTC1h 25m
2026-06-20 N46PF - Jun 20, 17:49 UTCJun 20, 18:04 UTC15m
2026-06-20 N46PF - Jun 20, 16:55 UTCJun 20, 17:10 UTC15m
2026-06-20 N46PF - Jun 20, 04:09 UTCJun 20, 05:34 UTC1h 25m
2026-06-20 N46PF - Jun 20, 00:29 UTCJun 20, 01:24 UTC55m
2026-06-19 N46PF - Jun 19, 23:19 UTCJun 19, 23:39 UTC20m
2026-06-19 N46PF - Jun 19, 22:34 UTCJun 19, 22:45 UTC10m
2026-06-19 N46PF - Jun 19, 21:09 UTCJun 19, 21:39 UTC30m
2026-06-19 N46PF - Jun 19, 20:19 UTCJun 19, 20:34 UTC15m
2026-06-19 N46PF - Jun 19, 17:44 UTCJun 19, 18:54 UTC1h 10m
2026-06-19 N46PF - Jun 19, 02:35 UTCJun 19, 03:05 UTC30m
2026-06-19 N46PF - Jun 19, 00:20 UTCJun 19, 00:55 UTC35m
2026-06-18 N46PF - Jun 18, 22:40 UTCJun 18, 23:45 UTC1h 5m
2026-06-18 N46PF - Jun 18, 20:55 UTCJun 18, 21:30 UTC35m
2026-06-18 N46PF - Jun 18, 16:15 UTCJun 18, 18:05 UTC1h 50m
2026-06-18 N46PF - Jun 18, 04:05 UTCJun 18, 05:00 UTC55m
2026-06-18 N46PF - Jun 18, 01:50 UTCJun 18, 02:50 UTC1h 0m
2026-06-18 N46PF - Jun 18, 00:05 UTCJun 18, 01:00 UTC55m
2026-06-17 N46PF - Jun 17, 20:45 UTCJun 17, 22:20 UTC1h 35m
2026-06-17 N46PF - Jun 17, 18:25 UTCJun 17, 19:30 UTC1h 5m
2026-06-16 N46PF - Jun 16, 22:35 UTCJun 16, 23:50 UTC1h 15m
2026-06-16 N46PF - Jun 16, 20:30 UTCJun 16, 21:20 UTC50m
2026-06-16 N46PF - Jun 16, 17:35 UTCJun 16, 19:45 UTC2h 10m
2026-06-16 N46PF - Jun 16, 04:15 UTCJun 16, 04:35 UTC20m
2026-06-16 N46PF - Jun 16, 03:04 UTCJun 16, 03:39 UTC35m
2026-06-16 N46PF - Jun 16, 01:00 UTCJun 16, 01:45 UTC45m
2026-06-15 N46PF - Jun 15, 22:40 UTCJun 15, 23:15 UTC35m
2026-06-15 N46PF - Jun 15, 20:59 UTCJun 15, 22:00 UTC1h 0m
2026-06-15 N46PF - Jun 15, 18:15 UTCJun 15, 19:50 UTC1h 35m
2026-06-15 N46PF - Jun 15, 02:30 UTCJun 15, 03:30 UTC1h 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.

Mode-S A5988D frequently asked

What is Mode-S code A5988D?
A5988D is an ICAO 24-bit transponder address. Allocated to United States.
Where is Mode-S A5988D registered?
Mode-S code A5988D is allocated to United States (US). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is A5988D broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A5988D, octal 51314215, decimal 10,852,493.
What flights does A5988D operate?
Mode-S A5988D has broadcast 1 distinct callsign, including N46PF.