Apparatus

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sensors Mode-S transponder

A70699

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N5518G · CESSNA 172 Skyhawk · operated by CHRISTIANSEN AVIATION LLC

Hex
A70699
Octal
51603231
Decimal
10,946,201
Country
US
Tail
N5518G
Type
C172
No current signal · last broadcast 18d ago
Flights observed
115
Distinct callsigns
1
Country
US
Last broadcast
18d ago

Last known position

Most recent position reported by Mode-S A70699.

Country allocation

The ICAO 24-bit address A70699 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
OST11 - 115 2026-06-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-26 OST11 - Jun 26, 19:09 UTCJun 26, 19:24 UTC15m
2026-06-26 OST11 - Jun 26, 16:35 UTCJun 26, 17:29 UTC55m
2026-06-26 OST11 - Jun 26, 14:25 UTCJun 26, 15:15 UTC50m
2026-06-25 OST11 - Jun 25, 23:09 UTCJun 26, 00:15 UTC1h 5m
2026-06-25 OST11 - Jun 25, 19:54 UTCJun 25, 21:15 UTC1h 20m
2026-06-24 OST11 - Jun 24, 23:50 UTCJun 25, 00:35 UTC45m
2026-06-24 OST11 - Jun 24, 21:44 UTCJun 24, 22:45 UTC1h 0m
2026-06-24 OST11 - Jun 24, 19:04 UTCJun 24, 20:09 UTC1h 5m
2026-06-23 OST11 - Jun 23, 20:40 UTCJun 23, 22:29 UTC1h 50m
2026-06-23 OST11 - Jun 23, 15:55 UTCJun 23, 16:20 UTC25m
2026-06-23 OST11 - Jun 23, 10:55 UTCJun 23, 11:59 UTC1h 5m
2026-06-20 OST11 - Jun 20, 23:50 UTCJun 21, 00:34 UTC45m
2026-06-20 OST11 - Jun 20, 18:10 UTCJun 20, 18:54 UTC45m
2026-06-20 OST11 - Jun 20, 15:14 UTCJun 20, 15:49 UTC35m
2026-06-19 OST11 - Jun 19, 23:29 UTCJun 20, 00:04 UTC35m
2026-06-19 OST11 - Jun 19, 21:09 UTCJun 19, 22:09 UTC1h 0m
2026-06-19 OST11 - Jun 19, 18:14 UTCJun 19, 19:09 UTC55m
2026-06-19 OST11 - Jun 19, 13:34 UTCJun 19, 14:49 UTC1h 15m
2026-06-19 OST11 - Jun 19, 00:14 UTCJun 19, 01:10 UTC55m
2026-06-18 OST11 - Jun 18, 00:45 UTCJun 18, 01:40 UTC55m
2026-06-17 OST11 SWO → SWO Jun 17, 22:35 UTCJun 17, 23:40 UTC1h 5m
2026-06-17 OST11 - Jun 17, 13:20 UTCJun 17, 14:05 UTC45m
2026-06-17 OST11 - Jun 17, 00:30 UTCJun 17, 01:05 UTC35m
2026-06-16 OST11 SWO → SWO Jun 16, 22:10 UTCJun 16, 23:10 UTC1h 0m
2026-06-16 OST11 - Jun 16, 18:20 UTCJun 16, 19:50 UTC1h 31m
2026-06-16 OST11 - Jun 16, 15:35 UTCJun 16, 17:00 UTC1h 25m
2026-06-16 OST11 - Jun 16, 13:19 UTCJun 16, 14:20 UTC1h 0m
2026-06-16 OST11 - Jun 16, 02:24 UTCJun 16, 03:25 UTC1h 0m
2026-06-15 OST11 - Jun 15, 23:45 UTCJun 16, 01:04 UTC1h 20m
2026-06-15 OST11 - Jun 15, 21:30 UTCJun 15, 22:49 UTC1h 20m
2026-06-15 OST11 - Jun 15, 19:14 UTCJun 15, 20:20 UTC1h 5m
2026-06-15 OST11 - Jun 15, 17:30 UTCJun 15, 18:04 UTC35m
2026-06-14 OST11 - Jun 14, 20:05 UTCJun 14, 20:55 UTC50m
2026-06-13 OST11 - Jun 13, 21:20 UTCJun 13, 22:10 UTC50m
2026-06-13 OST11 - Jun 13, 19:00 UTCJun 13, 19:50 UTC50m
2026-06-13 OST11 - Jun 13, 14:45 UTCJun 13, 16:05 UTC1h 20m
2026-06-12 OST11 - Jun 12, 21:45 UTCJun 12, 22:35 UTC50m
2026-06-12 OST11 - Jun 12, 20:10 UTCJun 12, 20:50 UTC40m
2026-06-12 OST11 - Jun 12, 14:01 UTCJun 12, 15:00 UTC1h 0m
2026-06-10 OST11 - Jun 10, 19:45 UTCJun 10, 20:15 UTC30m
2026-06-10 OST11 - Jun 10, 14:45 UTCJun 10, 16:00 UTC1h 15m
2026-06-10 OST11 - Jun 10, 02:40 UTCJun 10, 04:00 UTC1h 20m
2026-06-09 OST11 - Jun 9, 22:40 UTCJun 10, 00:15 UTC1h 35m
2026-06-08 OST11 - Jun 8, 19:45 UTCJun 8, 20:35 UTC50m
2026-06-08 OST11 - Jun 8, 16:55 UTCJun 8, 18:05 UTC1h 10m
2026-06-05 OST11 - Jun 5, 21:25 UTCJun 5, 22:20 UTC55m
2026-06-04 OST11 SWO → SWO Jun 4, 20:00 UTCJun 4, 20:55 UTC55m
2026-06-04 OST11 - Jun 4, 16:35 UTCJun 4, 17:45 UTC1h 10m
2026-06-04 OST11 - Jun 4, 14:10 UTCJun 4, 14:40 UTC30m
2026-06-03 OST11 - Jun 3, 23:00 UTCJun 3, 23:45 UTC45m

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 N5518G page for operator, model, and routing details .

Mode-S A70699 frequently asked

What is Mode-S code A70699?
A70699 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N5518G.
Where is Mode-S A70699 registered?
Mode-S code A70699 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 A70699 broadcasting right now?
No active broadcast right now. Last signal was 18d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A70699, octal 51603231, decimal 10,946,201.
What flights does A70699 operate?
Mode-S A70699 has broadcast 1 distinct callsign, including OST11.