Apparatus

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sensors Mode-S transponder

A2F7D7

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N2900E · CESSNA 172 Skyhawk · operated by CENTAURUS LLC

Hex
A2F7D7
Octal
50573727
Decimal
10,680,279
Country
US
Tail
N2900E
Type
C172
No current signal · last broadcast 2d ago
Flights observed
142
Distinct callsigns
1
Country
US
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S A2F7D7.

Country allocation

The ICAO 24-bit address A2F7D7 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
N2900E - 142 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-11 N2900E - Jul 11, 22:45 UTCJul 11, 23:25 UTC40m
2026-07-11 N2900E EMT → EMT Jul 11, 20:30 UTCJul 11, 21:45 UTC1h 15m
2026-07-11 N2900E - Jul 11, 17:30 UTCJul 11, 18:00 UTC30m
2026-07-11 N2900E EMT → EMT Jul 11, 00:05 UTCJul 11, 00:50 UTC45m
2026-07-09 N2900E - Jul 9, 20:30 UTCJul 9, 21:30 UTC1h 0m
2026-07-09 N2900E - Jul 9, 17:35 UTCJul 9, 18:50 UTC1h 15m
2026-07-09 N2900E - Jul 9, 02:20 UTCJul 9, 03:30 UTC1h 10m
2026-07-08 N2900E EMT → EMT Jul 8, 17:25 UTCJul 8, 19:00 UTC1h 35m
2026-07-07 N2900E EMT → EMT Jul 7, 21:40 UTCJul 7, 21:55 UTC15m
2026-07-07 N2900E - Jul 7, 18:45 UTCJul 7, 19:30 UTC45m
2026-07-07 N2900E EMT → EMT Jul 7, 02:25 UTCJul 7, 03:25 UTC1h 0m
2026-07-07 N2900E EMT → EMT Jul 7, 00:50 UTCJul 7, 01:50 UTC1h 0m
2026-07-06 N2900E - Jul 6, 23:00 UTCJul 7, 00:00 UTC1h 0m
2026-07-06 N2900E EMT → EMT Jul 6, 20:30 UTCJul 6, 21:25 UTC55m
2026-07-06 N2900E EMT → EMT Jul 6, 18:00 UTCJul 6, 19:15 UTC1h 15m
2026-07-06 N2900E - Jul 6, 04:10 UTCJul 6, 05:15 UTC1h 5m
2026-07-06 N2900E EMT → EMT Jul 6, 00:40 UTCJul 6, 03:20 UTC2h 40m
2026-07-05 N2900E - Jul 5, 23:30 UTCJul 6, 00:05 UTC35m
2026-07-05 N2900E - Jul 5, 20:05 UTCJul 5, 21:05 UTC1h 0m
2026-07-05 N2900E - Jul 5, 17:45 UTCJul 5, 18:10 UTC25m
2026-07-05 N2900E - Jul 5, 03:05 UTCJul 5, 04:40 UTC1h 35m
2026-07-04 N2900E EMT → EMT Jul 4, 21:35 UTCJul 4, 22:25 UTC50m
2026-07-04 N2900E EMT → EMT Jul 4, 17:25 UTCJul 4, 18:25 UTC1h 0m
2026-07-04 N2900E - Jul 4, 02:50 UTCJul 4, 04:05 UTC1h 15m
2026-07-03 N2900E EMT → EMT Jul 3, 19:25 UTCJul 3, 21:00 UTC1h 35m
2026-07-03 N2900E - Jul 3, 17:40 UTCJul 3, 18:50 UTC1h 10m
2026-07-03 N2900E - Jul 3, 00:00 UTCJul 3, 02:10 UTC2h 10m
2026-07-02 N2900E EMT → EMT Jul 2, 20:05 UTCJul 2, 20:35 UTC30m
2026-07-02 N2900E - Jul 2, 19:00 UTCJul 2, 19:30 UTC30m
2026-07-02 N2900E EMT → EMT Jul 2, 16:45 UTCJul 2, 17:55 UTC1h 10m
2026-06-30 N2900E EMT → EMT Jun 30, 18:05 UTCJun 30, 19:35 UTC1h 30m
2026-06-30 N2900E - Jun 30, 00:55 UTCJun 30, 01:55 UTC1h 1m
2026-06-29 N2900E EMT → EMT Jun 29, 20:49 UTCJun 29, 21:34 UTC45m
2026-06-29 N2900E EMT → EMT Jun 29, 18:49 UTCJun 29, 19:49 UTC1h 0m
2026-06-29 N2900E - Jun 29, 02:00 UTCJun 29, 03:20 UTC1h 20m
2026-06-28 N2900E EMT → EMT Jun 28, 23:29 UTCJun 29, 00:29 UTC1h 0m
2026-06-28 N2900E EMT → EMT Jun 28, 19:04 UTCJun 28, 20:25 UTC1h 20m
2026-06-27 N2900E EMT → EMT Jun 27, 23:19 UTCJun 27, 23:50 UTC30m
2026-06-27 N2900E EMT → EMT Jun 27, 21:19 UTCJun 27, 22:15 UTC55m
2026-06-27 N2900E - Jun 27, 17:09 UTCJun 27, 17:34 UTC25m
2026-06-26 N2900E EMT → EMT Jun 26, 21:59 UTCJun 26, 22:25 UTC25m
2026-06-26 N2900E EMT → EMT Jun 26, 19:55 UTCJun 26, 20:29 UTC35m
2026-06-26 N2900E EMT → EMT Jun 26, 17:54 UTCJun 26, 18:54 UTC1h 0m
2026-06-26 N2900E EMT → EMT Jun 26, 00:55 UTCJun 26, 02:05 UTC1h 10m
2026-06-25 N2900E EMT → EMT Jun 25, 19:24 UTCJun 25, 19:54 UTC30m
2026-06-25 N2900E - Jun 25, 00:55 UTCJun 25, 01:44 UTC50m
2026-06-24 N2900E - Jun 24, 20:14 UTCJun 24, 22:49 UTC2h 35m
2026-06-24 N2900E EMT → EMT Jun 24, 17:40 UTCJun 24, 19:00 UTC1h 20m
2026-06-23 N2900E EMT → EMT Jun 23, 22:34 UTCJun 23, 23:44 UTC1h 10m
2026-06-23 N2900E EMT → EMT Jun 23, 16:54 UTCJun 23, 17:54 UTC1h 0m

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 N2900E page for operator, model, and routing details .

Mode-S A2F7D7 frequently asked

What is Mode-S code A2F7D7?
A2F7D7 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N2900E.
Where is Mode-S A2F7D7 registered?
Mode-S code A2F7D7 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 A2F7D7 broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2F7D7, octal 50573727, decimal 10,680,279.
What flights does A2F7D7 operate?
Mode-S A2F7D7 has broadcast 1 distinct callsign, including N2900E.