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sensors Mode-S transponder

ACC27B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N921GD · operated by AIR CHARTER INC DBA, AIR FLAMENCO

Hex
ACC27B
Octal
53141173
Decimal
11,321,979
Country
US
Tail
N921GD
Type
BN2P
No current signal · last broadcast Jul 22, 15:45 UTC
Flights observed
47
Distinct callsigns
1
Country
US
Last broadcast
Jul 22, 15:45 UTC

Last known position

Most recent position reported by Mode-S ACC27B.

Country allocation

The ICAO 24-bit address ACC27B 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
N921GD - 47 2026-07-22

Recent flights last 47

DateFlightRouteTakeoffLandingDuration
2026-07-22 N921GD - Jul 22, 15:30 UTCJul 22, 15:45 UTC15m
2026-07-22 N921GD - Jul 22, 12:00 UTCJul 22, 12:10 UTC10m
2026-07-21 N921GD - Jul 21, 20:35 UTCJul 21, 20:55 UTC20m
2026-07-21 N921GD - Jul 21, 19:25 UTCJul 21, 19:40 UTC15m
2026-07-20 N921GD - Jul 20, 16:00 UTCJul 20, 16:15 UTC15m
2026-07-20 N921GD - Jul 20, 14:35 UTCJul 20, 14:50 UTC15m
2026-07-11 N921GD - Jul 11, 11:50 UTCJul 11, 12:10 UTC20m
2026-07-10 N921GD - Jul 10, 17:30 UTCJul 10, 18:20 UTC50m
2026-07-08 N921GD - Jul 8, 11:40 UTCJul 8, 12:05 UTC25m
2026-07-07 N921GD - Jul 7, 19:25 UTCJul 7, 19:35 UTC10m
2026-07-07 N921GD - Jul 7, 16:35 UTCJul 7, 17:30 UTC55m
2026-07-07 N921GD - Jul 7, 11:45 UTCJul 7, 12:05 UTC20m
2026-07-06 N921GD - Jul 6, 20:05 UTCJul 6, 20:25 UTC20m
2026-07-06 N921GD - Jul 6, 16:20 UTCJul 6, 17:15 UTC55m
2026-07-06 N921GD - Jul 6, 12:40 UTCJul 6, 13:00 UTC20m
2026-07-05 N921GD - Jul 5, 19:05 UTCJul 5, 19:15 UTC10m
2026-07-03 N921GD - Jul 3, 16:10 UTCJul 3, 16:20 UTC10m
2026-07-02 N921GD - Jul 2, 21:35 UTCJul 2, 21:50 UTC15m
2026-07-02 N921GD - Jul 2, 20:15 UTCJul 2, 20:35 UTC20m
2026-07-02 N921GD - Jul 2, 19:20 UTCJul 2, 19:35 UTC15m
2026-07-02 N921GD - Jul 2, 17:15 UTCJul 2, 17:30 UTC15m
2026-07-02 N921GD - Jul 2, 16:05 UTCJul 2, 16:25 UTC20m
2026-07-02 N921GD - Jul 2, 11:40 UTCJul 2, 12:00 UTC20m
2026-07-01 N921GD - Jul 1, 21:40 UTCJul 1, 21:55 UTC15m
2026-07-01 N921GD - Jul 1, 20:20 UTCJul 1, 20:40 UTC20m
2026-07-01 N921GD - Jul 1, 19:25 UTCJul 1, 19:45 UTC20m
2026-07-01 N921GD - Jul 1, 17:05 UTCJul 1, 17:25 UTC20m
2026-07-01 N921GD - Jul 1, 16:05 UTCJul 1, 16:25 UTC20m
2026-07-01 N921GD - Jul 1, 11:40 UTCJul 1, 12:05 UTC25m
2026-06-30 N921GD - Jun 30, 21:45 UTCJun 30, 22:00 UTC15m
2026-06-30 N921GD - Jun 30, 20:30 UTCJun 30, 20:50 UTC20m
2026-06-30 N921GD - Jun 30, 19:30 UTCJun 30, 19:50 UTC20m
2026-06-30 N921GD - Jun 30, 16:15 UTCJun 30, 17:20 UTC1h 5m
2026-06-30 N921GD - Jun 30, 11:40 UTCJun 30, 12:00 UTC20m
2026-06-29 N921GD - Jun 29, 21:44 UTCJun 29, 22:00 UTC15m
2026-06-29 N921GD - Jun 29, 20:09 UTCJun 29, 20:35 UTC25m
2026-06-29 N921GD - Jun 29, 16:04 UTCJun 29, 16:19 UTC15m
2026-06-29 N921GD - Jun 29, 11:55 UTCJun 29, 12:09 UTC15m
2026-06-25 N921GD - Jun 25, 21:40 UTCJun 25, 21:55 UTC15m
2026-06-25 N921GD - Jun 25, 20:30 UTCJun 25, 20:45 UTC15m
2026-06-25 N921GD - Jun 25, 19:29 UTCJun 25, 19:44 UTC15m
2026-06-25 N921GD - Jun 25, 17:30 UTCJun 25, 17:49 UTC20m
2026-06-23 N921GD - Jun 23, 22:05 UTCJun 23, 22:15 UTC10m
2026-06-23 N921GD - Jun 23, 20:29 UTCJun 23, 20:44 UTC15m
2026-06-23 N921GD - Jun 23, 19:24 UTCJun 23, 19:44 UTC20m
2026-06-23 N921GD - Jun 23, 00:54 UTCJun 23, 01:40 UTC45m
2026-06-19 N921GD - Jun 19, 12:49 UTCJun 19, 13:04 UTC15m

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 N921GD page for operator, model, and routing details .

Mode-S ACC27B frequently asked

What is Mode-S code ACC27B?
ACC27B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N921GD.
Where is Mode-S ACC27B registered?
Mode-S code ACC27B 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 ACC27B broadcasting right now?
No active broadcast right now. Last signal was Jul 22, 15:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACC27B, octal 53141173, decimal 11,321,979.
What flights does ACC27B operate?
Mode-S ACC27B has broadcast 1 distinct callsign, including N921GD.