Apparatus

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sensors Mode-S transponder

AD2F1A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N949FF · GULFSTREAM 5 · operated by PACIFICO 949 LLC

Hex
AD2F1A
Octal
53227432
Decimal
11,349,786
Country
US
Tail
N949FF
Type
GLF5
No current signal · last broadcast 14h ago
Flights observed
83
Distinct callsigns
1
Country
US
Last broadcast
14h ago

Last known position

Most recent position reported by Mode-S AD2F1A.

Country allocation

The ICAO 24-bit address AD2F1A 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
SIS49 - 83 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-20 SIS49 - Jul 20, 23:55 UTCJul 21, 01:15 UTC1h 20m
2026-07-20 SIS49 - Jul 20, 00:15 UTCJul 20, 03:40 UTC3h 25m
2026-07-19 SIS49 - Jul 19, 05:35 UTCJul 19, 08:45 UTC3h 10m
2026-07-19 SIS49 - Jul 19, 02:05 UTCJul 19, 03:15 UTC1h 10m
2026-07-15 SIS49 - Jul 15, 15:05 UTCJul 15, 19:55 UTC4h 50m
2026-07-13 SIS49 - Jul 13, 23:20 UTCJul 14, 00:15 UTC55m
2026-07-13 SIS49 - Jul 13, 16:20 UTCJul 13, 21:20 UTC5h 0m
2026-07-13 SIS49 LAS → VNY Jul 13, 06:25 UTCJul 13, 07:05 UTC40m
2026-07-12 SIS49 VNY → LAS Jul 12, 21:25 UTCJul 12, 22:10 UTC45m
2026-07-11 SIS49 APA → VNY Jul 11, 20:35 UTCJul 11, 22:20 UTC1h 45m
2026-07-11 SIS49 - Jul 11, 18:40 UTCJul 11, 19:50 UTC1h 10m
2026-07-11 SIS49 - Jul 11, 14:40 UTCJul 11, 15:50 UTC1h 10m
2026-07-07 SIS49 - Jul 7, 21:40 UTCJul 7, 22:25 UTC45m
2026-07-07 SIS49 - Jul 7, 15:40 UTCJul 7, 21:15 UTC5h 35m
2026-07-07 SIS49 - Jul 7, 12:35 UTCJul 7, 13:10 UTC35m
2026-07-06 SIS49 COE → FOK Jul 6, 18:25 UTCJul 6, 22:40 UTC4h 15m
2026-07-06 SIS49 - Jul 6, 10:40 UTCJul 6, 15:15 UTC4h 35m
2026-07-02 SIS49 - Jul 2, 16:15 UTCJul 2, 21:10 UTC4h 55m
2026-07-02 SIS49 VNY → NUQ Jul 2, 14:00 UTCJul 2, 14:45 UTC45m
2026-06-28 SIS49 - Jun 28, 22:34 UTCJun 28, 23:25 UTC50m
2026-06-28 SIS49 - Jun 28, 17:10 UTCJun 28, 21:59 UTC4h 50m
2026-06-26 SIS49 - Jun 26, 16:09 UTCJun 26, 20:10 UTC4h 0m
2026-06-25 SIS49 - Jun 25, 19:49 UTCJun 25, 20:30 UTC40m
2026-06-25 SIS49 - Jun 25, 17:49 UTCJun 25, 19:15 UTC1h 25m
2026-06-24 SIS49 - Jun 24, 21:29 UTCJun 24, 23:00 UTC1h 30m
2026-06-24 SIS49 VNY → NUQ Jun 24, 19:24 UTCJun 24, 20:05 UTC40m
2026-06-23 SIS49 BFL → VNY Jun 23, 00:19 UTCJun 23, 00:50 UTC30m
2026-06-22 SIS49 - Jun 22, 23:14 UTCJun 23, 00:00 UTC45m
2026-06-22 SIS49 - Jun 22, 21:14 UTCJun 22, 21:35 UTC20m
2026-06-21 SIS49 - Jun 21, 19:34 UTCJun 22, 00:44 UTC5h 10m
2026-06-19 SIS49 - Jun 19, 00:20 UTCJun 19, 04:39 UTC4h 20m
2026-06-17 SIS49 TEB → OAK Jun 17, 23:05 UTCJun 18, 04:40 UTC5h 35m
2026-06-14 SIS49 OAK → TEB Jun 14, 20:05 UTCJun 15, 00:45 UTC4h 40m
2026-06-13 SIS49 - Jun 13, 23:05 UTCJun 14, 00:30 UTC1h 25m
2026-06-12 SIS49 - Jun 12, 14:25 UTCJun 12, 16:45 UTC2h 20m
2026-06-12 SIS49 - Jun 12, 12:30 UTCJun 12, 13:35 UTC1h 5m
2026-06-11 SIS49 - Jun 11, 17:35 UTCJun 11, 18:10 UTC35m
2026-06-11 SIS49 FOK → TEB Jun 11, 12:30 UTCJun 11, 13:00 UTC30m
2026-06-10 SIS49 - Jun 10, 16:25 UTCJun 10, 21:10 UTC4h 45m
2026-06-10 SIS49 - Jun 10, 00:15 UTCJun 10, 00:40 UTC25m
2026-06-09 SIS49 - Jun 9, 20:50 UTCJun 9, 23:50 UTC3h 0m
2026-06-09 SIS49 NCE → FAR Jun 9, 11:10 UTCJun 9, 20:20 UTC9h 10m
2026-06-05 SIS49 VIY → NCE Jun 5, 10:10 UTCJun 5, 11:20 UTC1h 10m
2026-05-31 SIS49 - May 31, 23:45 UTCJun 1, 10:35 UTC10h 50m
2026-05-31 SIS49 - May 31, 22:45 UTCMay 31, 23:05 UTC20m
2026-05-26 SIS49 - May 26, 00:04 UTCMay 26, 00:29 UTC25m
2026-05-25 SIS49 - May 25, 23:04 UTCMay 25, 23:40 UTC35m
2026-05-25 SIS49 - May 25, 22:10 UTCMay 25, 22:40 UTC30m
2026-05-21 SIS49 - May 21, 16:55 UTCMay 21, 18:25 UTC1h 30m
2026-05-18 SIS49 - May 18, 19:05 UTCMay 18, 19:25 UTC20m

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 N949FF page for operator, model, and routing details .

Mode-S AD2F1A frequently asked

What is Mode-S code AD2F1A?
AD2F1A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N949FF.
Where is Mode-S AD2F1A registered?
Mode-S code AD2F1A 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 AD2F1A broadcasting right now?
No active broadcast right now. Last signal was 14h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD2F1A, octal 53227432, decimal 11,349,786.
What flights does AD2F1A operate?
Mode-S AD2F1A has broadcast 1 distinct callsign, including SIS49.