Apparatus

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sensors Mode-S transponder

ACA31C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N913PG · HUGHES 500 · operated by PRINCE GEORGES COUNTY POLICE DEPT

Hex
ACA31C
Octal
53121434
Decimal
11,313,948
Country
US
Tail
N913PG
Type
H500
No current signal · last broadcast 5d ago
Flights observed
57
Distinct callsigns
1
Country
US
Last broadcast
5d ago

Last known position

Most recent position reported by Mode-S ACA31C.

Country allocation

The ICAO 24-bit address ACA31C 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
GARDN3 - 57 2026-07-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-08 GARDN3 CGS → CGS Jul 8, 23:30 UTCJul 9, 00:15 UTC45m
2026-06-22 GARDN3 CGS → CGS Jun 22, 02:45 UTCJun 22, 03:54 UTC1h 10m
2026-06-21 GARDN3 CGS → CGS Jun 21, 19:14 UTCJun 21, 19:29 UTC15m
2026-06-21 GARDN3 - Jun 21, 05:35 UTCJun 21, 06:50 UTC1h 15m
2026-06-21 GARDN3 - Jun 21, 03:55 UTCJun 21, 05:20 UTC1h 25m
2026-06-20 GARDN3 - Jun 20, 17:19 UTCJun 20, 17:49 UTC30m
2026-06-20 GARDN3 - Jun 20, 00:24 UTCJun 20, 00:44 UTC20m
2026-06-19 GARDN3 CGS → CGS Jun 19, 22:49 UTCJun 19, 23:39 UTC50m
2026-06-19 GARDN3 CGS → CGS Jun 19, 00:24 UTCJun 19, 00:45 UTC20m
2026-06-18 GARDN3 CGS → CGS Jun 18, 22:15 UTCJun 18, 22:40 UTC25m
2026-06-18 GARDN3 CGS → CGS Jun 18, 19:50 UTCJun 18, 20:15 UTC25m
2026-06-18 GARDN3 CGS → CGS Jun 18, 13:50 UTCJun 18, 14:15 UTC25m
2026-06-18 GARDN3 - Jun 18, 02:50 UTCJun 18, 03:25 UTC35m
2026-06-17 GARDN3 CGS → CGS Jun 17, 21:55 UTCJun 17, 23:05 UTC1h 10m
2026-06-17 GARDN3 - Jun 17, 03:35 UTCJun 17, 05:40 UTC2h 5m
2026-06-16 GARDN3 CGS → CGS Jun 16, 23:15 UTCJun 17, 00:10 UTC55m
2026-06-14 GARDN3 CGS → CGS Jun 14, 22:05 UTCJun 14, 23:35 UTC1h 29m
2026-06-12 GARDN3 - Jun 12, 23:25 UTCJun 12, 23:40 UTC15m
2026-06-12 GARDN3 CGS → CGS Jun 12, 21:20 UTCJun 12, 21:45 UTC25m
2026-06-12 GARDN3 - Jun 12, 17:35 UTCJun 12, 18:50 UTC1h 15m
2026-06-12 GARDN3 CGS → CGS Jun 12, 17:00 UTCJun 12, 17:30 UTC30m
2026-06-11 GARDN3 CGS → CGS Jun 11, 22:45 UTCJun 11, 23:30 UTC45m
2026-06-11 GARDN3 CGS → CGS Jun 11, 21:20 UTCJun 11, 21:25 UTC5m
2026-06-11 GARDN3 CGS → CGS Jun 11, 15:30 UTCJun 11, 16:20 UTC50m
2026-06-11 GARDN3 CGS → CGS Jun 11, 03:10 UTCJun 11, 03:35 UTC25m
2026-06-10 GARDN3 CGS → CGS Jun 10, 15:35 UTCJun 10, 15:50 UTC15m
2026-06-10 GARDN3 CGS → CGS Jun 10, 15:15 UTCJun 10, 15:30 UTC15m
2026-06-10 GARDN3 CGS → CGS Jun 10, 14:35 UTCJun 10, 15:10 UTC35m
2026-06-09 GARDN3 CGS → CGS Jun 9, 19:25 UTCJun 9, 20:15 UTC50m
2026-06-09 GARDN3 CGS → CGS Jun 9, 13:55 UTCJun 9, 15:10 UTC1h 15m
2026-06-09 GARDN3 CGS → CGS Jun 9, 13:40 UTCJun 9, 13:50 UTC10m
2026-06-09 GARDN3 - Jun 9, 02:30 UTCJun 9, 04:05 UTC1h 35m
2026-06-08 GARDN3 CGS → CGS Jun 8, 19:05 UTCJun 8, 20:10 UTC1h 5m
2026-06-08 GARDN3 CGS → CGS Jun 8, 16:15 UTCJun 8, 17:00 UTC45m
2026-06-08 GARDN3 CGS → CGS Jun 8, 02:00 UTCJun 8, 03:15 UTC1h 15m
2026-06-06 GARDN3 CGS → CGS Jun 6, 21:44 UTCJun 6, 22:10 UTC25m
2026-06-05 GARDN3 CGS → CGS Jun 5, 03:30 UTCJun 5, 03:45 UTC15m
2026-06-04 GARDN3 CGS → CGS Jun 4, 22:15 UTCJun 4, 23:05 UTC50m
2026-06-04 GARDN3 CGS → CGS Jun 4, 13:50 UTCJun 4, 15:25 UTC1h 35m
2026-06-04 GARDN3 CGS → CGS Jun 4, 01:40 UTCJun 4, 02:45 UTC1h 5m
2026-06-03 GARDN3 - Jun 3, 20:40 UTCJun 3, 21:30 UTC50m
2026-06-03 GARDN3 CGS → CGS Jun 3, 03:35 UTCJun 3, 04:00 UTC25m
2026-06-03 GARDN3 CGS → CGS Jun 3, 01:40 UTCJun 3, 01:55 UTC15m
2026-06-02 GARDN3 CGS → CGS Jun 2, 23:35 UTCJun 3, 00:30 UTC55m
2026-06-02 GARDN3 CGS → CGS Jun 2, 01:35 UTCJun 2, 02:55 UTC1h 20m
2026-06-01 GARDN3 CGS → CGS Jun 1, 15:25 UTCJun 1, 15:30 UTC5m
2026-06-01 GARDN3 CGS → CGS Jun 1, 14:25 UTCJun 1, 15:20 UTC55m
2026-06-01 GARDN3 CGS → CGS Jun 1, 14:10 UTCJun 1, 14:20 UTC10m
2026-06-01 GARDN3 CGS → CGS Jun 1, 13:55 UTCJun 1, 14:00 UTC5m
2026-05-30 GARDN3 CGS → CGS May 30, 02:10 UTCMay 30, 03:00 UTC50m

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 N913PG page for operator, model, and routing details .

Mode-S ACA31C frequently asked

What is Mode-S code ACA31C?
ACA31C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N913PG.
Where is Mode-S ACA31C registered?
Mode-S code ACA31C 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 ACA31C broadcasting right now?
No active broadcast right now. Last signal was 5d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACA31C, octal 53121434, decimal 11,313,948.
What flights does ACA31C operate?
Mode-S ACA31C has broadcast 1 distinct callsign, including GARDN3.