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sensors Mode-S transponder

AB20F9

ICAO 24-bit transponder address · allocated to United States

Hex
AB20F9
Octal
52620371
Decimal
11,215,097
Country
US
No current signal · last broadcast 1d ago
Flights observed
128
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S AB20F9.

Country allocation

The ICAO 24-bit address AB20F9 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
N816PP - 128 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-20 N816PP - Jul 20, 15:35 UTCJul 20, 15:45 UTC10m
2026-07-20 N816PP - Jul 20, 13:55 UTCJul 20, 14:50 UTC55m
2026-07-19 N816PP - Jul 19, 20:10 UTCJul 19, 20:15 UTC5m
2026-07-19 N816PP - Jul 19, 19:05 UTCJul 19, 19:15 UTC10m
2026-07-19 N816PP HSH → HSH Jul 19, 14:45 UTCJul 19, 16:40 UTC1h 55m
2026-07-18 N816PP - Jul 18, 20:10 UTCJul 18, 20:25 UTC15m
2026-07-18 N816PP - Jul 18, 17:40 UTCJul 18, 19:35 UTC1h 55m
2026-07-18 N816PP HSH → SBA Jul 18, 14:05 UTCJul 18, 16:10 UTC2h 5m
2026-07-08 N816PP - Jul 8, 18:05 UTCJul 8, 18:25 UTC20m
2026-07-08 N816PP - Jul 8, 16:40 UTCJul 8, 17:00 UTC20m
2026-07-06 N816PP - Jul 6, 20:00 UTCJul 6, 20:05 UTC5m
2026-07-06 N816PP - Jul 6, 19:00 UTCJul 6, 19:25 UTC25m
2026-07-06 N816PP - Jul 6, 15:15 UTCJul 6, 15:25 UTC10m
2026-07-06 N816PP - Jul 6, 13:35 UTCJul 6, 14:00 UTC25m
2026-07-04 N816PP - Jul 4, 18:25 UTCJul 4, 19:00 UTC35m
2026-07-04 N816PP - Jul 4, 16:40 UTCJul 4, 17:05 UTC25m
2026-07-03 N816PP - Jul 3, 21:25 UTCJul 3, 22:00 UTC35m
2026-07-03 N816PP HSH → HSH Jul 3, 18:05 UTCJul 3, 19:10 UTC1h 5m
2026-07-03 N816PP - Jul 3, 15:45 UTCJul 3, 15:55 UTC10m
2026-07-03 N816PP - Jul 3, 14:40 UTCJul 3, 14:45 UTC5m
2026-06-29 N816PP - Jun 29, 15:00 UTCJun 29, 15:14 UTC15m
2026-06-29 N816PP - Jun 29, 13:30 UTCJun 29, 13:54 UTC25m
2026-06-28 N816PP HSH → HSH Jun 28, 15:05 UTCJun 28, 16:39 UTC1h 35m
2026-06-26 N816PP HSH → HSH Jun 26, 18:39 UTCJun 26, 20:20 UTC1h 40m
2026-06-23 N816PP - Jun 23, 13:34 UTCJun 23, 13:39 UTC5m
2026-06-23 N816PP - Jun 23, 12:35 UTCJun 23, 12:40 UTC5m
2026-06-21 N816PP - Jun 21, 00:10 UTCJun 21, 00:25 UTC15m
2026-06-20 N816PP - Jun 20, 21:55 UTCJun 20, 23:29 UTC1h 35m
2026-06-20 N816PP - Jun 20, 17:29 UTCJun 20, 18:40 UTC1h 10m
2026-06-20 N816PP - Jun 20, 16:24 UTCJun 20, 16:39 UTC15m
2026-06-16 N816PP HSH → HSH Jun 16, 12:39 UTCJun 16, 13:44 UTC1h 5m
2026-06-15 N816PP - Jun 15, 15:45 UTCJun 15, 16:04 UTC20m
2026-06-15 N816PP - Jun 15, 14:15 UTCJun 15, 15:04 UTC50m
2026-06-14 N816PP HSH → HSH Jun 14, 18:20 UTCJun 14, 20:15 UTC1h 55m
2026-06-14 N816PP - Jun 14, 16:40 UTCJun 14, 16:50 UTC10m
2026-06-14 N816PP - Jun 14, 15:20 UTCJun 14, 15:30 UTC10m
2026-06-13 N816PP - Jun 13, 19:55 UTCJun 13, 20:05 UTC10m
2026-06-13 N816PP - Jun 13, 19:00 UTCJun 13, 19:05 UTC5m
2026-06-12 N816PP - Jun 12, 22:40 UTCJun 12, 22:50 UTC10m
2026-06-12 N816PP - Jun 12, 21:00 UTCJun 12, 21:30 UTC30m
2026-06-12 N816PP HSH → HSH Jun 12, 19:15 UTCJun 12, 20:05 UTC50m
2026-06-12 N816PP HSH → HSH Jun 12, 12:50 UTCJun 12, 14:30 UTC1h 40m
2026-06-11 N816PP - Jun 11, 23:25 UTCJun 11, 23:45 UTC20m
2026-06-11 N816PP - Jun 11, 21:50 UTCJun 11, 22:50 UTC1h 0m
2026-06-11 N816PP - Jun 11, 18:45 UTCJun 11, 19:40 UTC55m
2026-06-11 N816PP - Jun 11, 17:20 UTCJun 11, 17:35 UTC15m
2026-06-10 N816PP HSH → HSH Jun 10, 17:35 UTCJun 10, 18:15 UTC40m
2026-06-09 N816PP - Jun 9, 20:50 UTCJun 9, 22:15 UTC1h 25m
2026-06-09 N816PP HSH → MYF Jun 9, 17:50 UTCJun 9, 19:30 UTC1h 40m
2026-06-07 N816PP HSH → HSH Jun 7, 18:00 UTCJun 7, 19:45 UTC1h 45m

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 AB20F9 frequently asked

What is Mode-S code AB20F9?
AB20F9 is an ICAO 24-bit transponder address. Allocated to United States.
Where is Mode-S AB20F9 registered?
Mode-S code AB20F9 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 AB20F9 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB20F9, octal 52620371, decimal 11,215,097.
What flights does AB20F9 operate?
Mode-S AB20F9 has broadcast 1 distinct callsign, including N816PP.