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sensors Mode-S transponder

A9918B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N7154G · CESSNA 172 Skyhawk · operated by JURANICH WILLIAM M

Hex
A9918B
Octal
52310613
Decimal
11,112,843
Country
US
Tail
N7154G
Type
C172
No current signal · last broadcast Jul 25, 18:30 UTC
Flights observed
138
Distinct callsigns
1
Country
US
Last broadcast
Jul 25, 18:30 UTC

Last known position

Most recent position reported by Mode-S A9918B.

Country allocation

The ICAO 24-bit address A9918B 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
N7154G - 138 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 N7154G - Jul 25, 18:15 UTCJul 25, 18:30 UTC15m
2026-07-25 N7154G - Jul 25, 14:10 UTCJul 25, 14:25 UTC15m
2026-07-24 N7154G - Jul 24, 23:45 UTCJul 24, 23:55 UTC10m
2026-07-23 N7154G - Jul 23, 16:05 UTCJul 23, 16:20 UTC15m
2026-07-22 N7154G - Jul 22, 22:00 UTCJul 22, 22:15 UTC15m
2026-07-22 N7154G - Jul 22, 16:30 UTCJul 22, 16:40 UTC10m
2026-07-20 N7154G - Jul 20, 23:55 UTCJul 21, 00:10 UTC15m
2026-07-20 N7154G - Jul 20, 16:30 UTCJul 20, 16:40 UTC10m
2026-07-18 N7154G - Jul 18, 23:20 UTCJul 18, 23:30 UTC10m
2026-07-18 N7154G - Jul 18, 18:10 UTCJul 18, 18:25 UTC15m
2026-07-17 N7154G - Jul 17, 23:05 UTCJul 17, 23:14 UTC10m
2026-07-17 N7154G - Jul 17, 16:59 UTCJul 17, 17:15 UTC15m
2026-07-16 N7154G - Jul 16, 02:05 UTCJul 16, 02:15 UTC10m
2026-07-15 N7154G - Jul 15, 16:25 UTCJul 15, 16:40 UTC15m
2026-07-14 N7154G - Jul 14, 23:00 UTCJul 14, 23:10 UTC10m
2026-07-14 N7154G - Jul 14, 16:50 UTCJul 14, 17:00 UTC10m
2026-07-13 N7154G - Jul 13, 22:50 UTCJul 13, 23:05 UTC15m
2026-07-13 N7154G - Jul 13, 16:25 UTCJul 13, 16:40 UTC15m
2026-07-12 N7154G - Jul 12, 21:40 UTCJul 12, 22:00 UTC20m
2026-07-12 N7154G - Jul 12, 17:40 UTCJul 12, 18:01 UTC20m
2026-07-11 N7154G - Jul 11, 20:50 UTCJul 11, 21:05 UTC15m
2026-07-11 N7154G - Jul 11, 16:35 UTCJul 11, 17:10 UTC35m
2026-07-11 N7154G - Jul 11, 14:45 UTCJul 11, 15:20 UTC35m
2026-07-11 N7154G - Jul 11, 14:00 UTCJul 11, 14:10 UTC10m
2026-07-10 N7154G - Jul 10, 19:05 UTCJul 10, 19:15 UTC10m
2026-07-10 N7154G - Jul 10, 16:15 UTCJul 10, 16:30 UTC15m
2026-07-10 N7154G - Jul 10, 00:25 UTCJul 10, 00:40 UTC15m
2026-07-09 N7154G - Jul 9, 16:30 UTCJul 9, 16:40 UTC10m
2026-07-08 N7154G - Jul 8, 23:00 UTCJul 8, 23:15 UTC15m
2026-07-08 N7154G - Jul 8, 17:35 UTCJul 8, 17:45 UTC10m
2026-07-07 N7154G - Jul 7, 23:30 UTCJul 7, 23:45 UTC15m
2026-07-07 N7154G - Jul 7, 16:20 UTCJul 7, 16:35 UTC15m
2026-07-06 N7154G - Jul 6, 22:35 UTCJul 6, 22:50 UTC15m
2026-07-06 N7154G - Jul 6, 15:50 UTCJul 6, 16:05 UTC15m
2026-07-03 N7154G - Jul 3, 22:25 UTCJul 3, 22:40 UTC15m
2026-07-03 N7154G - Jul 3, 17:35 UTCJul 3, 17:50 UTC15m
2026-07-02 N7154G - Jul 2, 23:40 UTCJul 2, 23:55 UTC15m
2026-07-02 N7154G - Jul 2, 16:50 UTCJul 2, 17:05 UTC15m
2026-07-01 N7154G - Jul 1, 23:15 UTCJul 1, 23:30 UTC15m
2026-07-01 N7154G - Jul 1, 17:35 UTCJul 1, 17:45 UTC10m
2026-06-30 N7154G - Jun 30, 22:55 UTCJun 30, 23:10 UTC15m
2026-06-30 N7154G - Jun 30, 17:40 UTCJun 30, 17:55 UTC15m
2026-06-30 N7154G - Jun 30, 02:45 UTCJun 30, 03:00 UTC15m
2026-06-30 N7154G - Jun 30, 01:45 UTCJun 30, 01:55 UTC10m
2026-06-29 N7154G - Jun 29, 23:29 UTCJun 29, 23:44 UTC15m
2026-06-29 N7154G - Jun 29, 17:14 UTCJun 29, 17:30 UTC15m
2026-06-24 N7154G - Jun 24, 21:50 UTCJun 24, 22:00 UTC10m
2026-06-24 N7154G - Jun 24, 16:59 UTCJun 24, 17:14 UTC15m
2026-06-23 N7154G - Jun 23, 22:44 UTCJun 23, 23:00 UTC15m
2026-06-23 N7154G - Jun 23, 16:39 UTCJun 23, 16:50 UTC10m

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 N7154G page for operator, model, and routing details .

Mode-S A9918B frequently asked

What is Mode-S code A9918B?
A9918B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N7154G.
Where is Mode-S A9918B registered?
Mode-S code A9918B 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 A9918B broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 18:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9918B, octal 52310613, decimal 11,112,843.
What flights does A9918B operate?
Mode-S A9918B has broadcast 1 distinct callsign, including N7154G.