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sensors Mode-S transponder

A1856F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N19760 · CESSNA 172 Skyhawk · operated by AERO ASSN OF CALIFORNIA INSTITUTE OF TECHNOLOGY

Hex
A1856F
Octal
50302557
Decimal
10,585,455
Country
US
Tail
N19760
Type
C172
Broadcasting now · callsign N19760 · 3,675 ft
Flights observed
118
Distinct callsigns
1
Country
US
Last broadcast
2d ago

Current position

A1856F is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A1856F 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
N19760 - 118 2026-07-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 N19760 - Jul 15, 21:55 UTCJul 15, 22:40 UTC45m
2026-07-15 N19760 - Jul 15, 18:05 UTCJul 15, 18:55 UTC50m
2026-07-13 N19760 - Jul 13, 20:05 UTCJul 13, 21:15 UTC1h 10m
2026-07-13 N19760 EMT → EMT Jul 13, 15:15 UTCJul 13, 17:30 UTC2h 15m
2026-07-12 N19760 BFL → EMT Jul 12, 19:10 UTCJul 12, 20:40 UTC1h 30m
2026-07-12 N19760 - Jul 12, 18:45 UTCJul 12, 19:05 UTC20m
2026-07-12 N19760 - Jul 12, 16:50 UTCJul 12, 17:35 UTC45m
2026-07-11 N19760 - Jul 11, 21:20 UTCJul 11, 22:20 UTC1h 0m
2026-07-10 N19760 - Jul 10, 22:45 UTCJul 11, 00:05 UTC1h 20m
2026-07-10 N19760 - Jul 10, 18:10 UTCJul 10, 18:50 UTC40m
2026-07-10 N19760 - Jul 10, 17:50 UTCJul 10, 18:05 UTC15m
2026-07-09 N19760 - Jul 9, 20:35 UTCJul 9, 21:35 UTC1h 0m
2026-07-08 N19760 EMT → EMT Jul 8, 21:20 UTCJul 8, 22:25 UTC1h 5m
2026-07-08 N19760 - Jul 8, 00:55 UTCJul 8, 01:50 UTC55m
2026-07-07 N19760 - Jul 7, 17:50 UTCJul 7, 18:25 UTC35m
2026-07-04 N19760 - Jul 4, 00:40 UTCJul 4, 01:50 UTC1h 10m
2026-07-03 N19760 EMT → EMT Jul 3, 18:30 UTCJul 3, 19:30 UTC1h 0m
2026-07-03 N19760 - Jul 3, 02:10 UTCJul 3, 03:30 UTC1h 20m
2026-07-02 N19760 EMT → EMT Jul 2, 04:05 UTCJul 2, 04:35 UTC30m
2026-07-02 N19760 - Jul 2, 00:45 UTCJul 2, 02:15 UTC1h 30m
2026-07-01 N19760 - Jul 1, 22:40 UTCJul 1, 23:50 UTC1h 10m
2026-07-01 N19760 - Jul 1, 00:55 UTCJul 1, 02:25 UTC1h 30m
2026-06-30 N19760 EMT → EMT Jun 30, 22:35 UTCJun 30, 23:45 UTC1h 10m
2026-06-30 N19760 EMT → EMT Jun 30, 20:05 UTCJun 30, 21:20 UTC1h 15m
2026-06-29 N19760 EMT → EMT Jun 29, 23:05 UTCJun 30, 00:39 UTC1h 35m
2026-06-29 N19760 - Jun 29, 20:30 UTCJun 29, 21:44 UTC1h 15m
2026-06-29 N19760 EMT → EMT Jun 29, 00:44 UTCJun 29, 01:25 UTC40m
2026-06-28 N19760 EMT → EMT Jun 28, 19:34 UTCJun 28, 20:19 UTC45m
2026-06-27 N19760 SBD → EMT Jun 27, 22:09 UTCJun 27, 22:40 UTC30m
2026-06-27 N19760 - Jun 27, 19:39 UTCJun 27, 20:14 UTC35m
2026-06-27 N19760 EMT → EMT Jun 27, 00:20 UTCJun 27, 01:19 UTC1h 0m
2026-06-18 N19760 EMT → EMT Jun 18, 00:55 UTCJun 18, 01:50 UTC55m
2026-06-17 N19760 - Jun 17, 03:45 UTCJun 17, 04:40 UTC55m
2026-06-17 N19760 - Jun 17, 02:15 UTCJun 17, 02:50 UTC35m
2026-06-16 N19760 - Jun 16, 01:10 UTCJun 16, 02:20 UTC1h 10m
2026-06-15 N19760 EMT → EMT Jun 15, 17:20 UTCJun 15, 18:20 UTC1h 0m
2026-06-14 N19760 - Jun 14, 17:10 UTCJun 14, 19:00 UTC1h 50m
2026-06-14 N19760 - Jun 14, 00:25 UTCJun 14, 01:10 UTC45m
2026-06-13 N19760 - Jun 13, 21:45 UTCJun 13, 22:30 UTC45m
2026-06-13 N19760 EMT → EMT Jun 13, 00:20 UTCJun 13, 01:30 UTC1h 10m
2026-06-11 N19760 - Jun 11, 17:55 UTCJun 11, 19:15 UTC1h 20m
2026-06-10 N19760 - Jun 10, 22:55 UTCJun 11, 00:10 UTC1h 15m
2026-06-09 N19760 - Jun 9, 20:40 UTCJun 9, 21:00 UTC20m
2026-06-09 N19760 - Jun 9, 19:40 UTCJun 9, 20:05 UTC25m
2026-06-08 N19760 - Jun 8, 21:10 UTCJun 8, 23:30 UTC2h 20m
2026-06-06 N19760 - Jun 6, 00:30 UTCJun 6, 02:05 UTC1h 35m
2026-06-05 N19760 EMT → EMT Jun 5, 22:00 UTCJun 5, 23:20 UTC1h 20m
2026-06-04 N19760 - Jun 4, 00:50 UTCJun 4, 01:40 UTC50m
2026-06-03 N19760 - Jun 3, 22:40 UTCJun 3, 23:35 UTC55m
2026-06-03 N19760 EMT → PSP Jun 3, 19:00 UTCJun 3, 19:55 UTC55m

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 N19760 page for operator, model, and routing details .

Mode-S A1856F frequently asked

What is Mode-S code A1856F?
A1856F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N19760.
Where is Mode-S A1856F registered?
Mode-S code A1856F 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 A1856F broadcasting right now?
Yes. Mode-S A1856F is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1856F, octal 50302557, decimal 10,585,455.
What flights does A1856F operate?
Mode-S A1856F has broadcast 1 distinct callsign, including N19760.