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sensors Mode-S transponder

A44A18

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N376AC · SHORT 360 · operated by ACC INTEGRATED SERVICES INC

Hex
A44A18
Octal
51045030
Decimal
10,766,872
Country
US
Tail
N376AC
Type
SH36
No current signal · last broadcast Jul 26, 10:05 UTC
Flights observed
112
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 10:05 UTC

Last known position

Most recent position reported by Mode-S A44A18.

Country allocation

The ICAO 24-bit address A44A18 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 20 distinct

Callsign Airline Flights Last seen
SNC111 - 18 2026-07-15
SNC211 Air Cargo Carriers 12 2026-07-23
SNC210 Air Cargo Carriers 12 2026-07-23
SNC1103 Air Cargo Carriers 9 2026-05-18
SNC1301 Air Cargo Carriers 8 2026-05-18
SNC491 Air Cargo Carriers 6 2026-07-26
SNC490 Air Cargo Carriers 6 2026-07-26
SNC600 Air Cargo Carriers 4 2026-07-22
SNC501 - 4 2026-07-20
SNC500 - 4 2026-07-20
SNC493 Air Cargo Carriers 3 2026-05-17
SNC492 Air Cargo Carriers 3 2026-05-17
SNC1401 - 3 2026-07-23
SNC1104 Air Cargo Carriers 3 2026-07-23
SNC1102 Air Cargo Carriers 3 2026-07-20
SNC601 Air Cargo Carriers 2 2026-07-22
SNC1201 - 2 2026-07-20
SNC962 - 1 2026-07-02
SNC961 - 1 2026-07-02
SNC939 - 1 2026-04-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SNC491 STX → SJU Jul 26, 09:50 UTCJul 26, 10:05 UTC15m
2026-07-26 SNC490 SJU → STX Jul 26, 07:10 UTCJul 26, 07:30 UTC20m
2026-07-25 SNC491 STX → SJU Jul 25, 09:20 UTCJul 25, 09:35 UTC15m
2026-07-25 SNC490 SJU → STX Jul 25, 07:25 UTCJul 25, 07:40 UTC15m
2026-07-24 SNC491 STX → SJU Jul 24, 09:30 UTCJul 24, 09:40 UTC10m
2026-07-24 SNC490 SJU → STX Jul 24, 07:05 UTCJul 24, 07:20 UTC15m
2026-07-23 SNC211 STX → SJU Jul 23, 23:00 UTCJul 23, 23:15 UTC15m
2026-07-23 SNC210 SJU → STX Jul 23, 20:05 UTCJul 23, 20:20 UTC15m
2026-07-23 SNC1401 - Jul 23, 13:40 UTCJul 23, 14:00 UTC20m
2026-07-23 SNC1104 SJU → SXM Jul 23, 10:50 UTCJul 23, 11:05 UTC15m
2026-07-22 SNC601 EIS → SJU Jul 22, 14:40 UTCJul 22, 15:05 UTC25m
2026-07-22 SNC600 SJU → EIS Jul 22, 12:15 UTCJul 22, 12:25 UTC10m
2026-07-20 SNC501 - Jul 20, 23:10 UTCJul 20, 23:30 UTC20m
2026-07-20 SNC500 - Jul 20, 20:00 UTCJul 20, 20:15 UTC15m
2026-07-20 SNC1201 - Jul 20, 14:05 UTCJul 20, 14:20 UTC15m
2026-07-20 SNC1102 SJU → STT Jul 20, 12:00 UTCJul 20, 12:10 UTC10m
2026-07-15 SNC111 - Jul 15, 20:25 UTCJul 15, 20:40 UTC15m
2026-07-15 SNC111 - Jul 15, 13:25 UTCJul 15, 13:45 UTC20m
2026-07-13 SNC491 - Jul 13, 09:20 UTCJul 13, 09:30 UTC10m
2026-07-13 SNC490 - Jul 13, 07:10 UTCJul 13, 07:25 UTC15m
2026-07-11 SNC111 - Jul 11, 22:15 UTCJul 11, 22:30 UTC15m
2026-07-11 SNC111 - Jul 11, 13:25 UTCJul 11, 13:45 UTC20m
2026-07-10 SNC111 - Jul 10, 20:40 UTCJul 10, 20:55 UTC15m
2026-07-10 SNC111 - Jul 10, 13:25 UTCJul 10, 13:50 UTC25m
2026-07-08 SNC111 - Jul 8, 22:00 UTCJul 8, 22:10 UTC10m
2026-07-08 SNC111 - Jul 8, 14:40 UTCJul 8, 15:00 UTC20m
2026-07-07 SNC111 - Jul 7, 22:40 UTCJul 7, 22:55 UTC15m
2026-07-07 SNC111 - Jul 7, 13:20 UTCJul 7, 13:40 UTC20m
2026-07-06 SNC501 - Jul 6, 23:05 UTCJul 6, 23:20 UTC15m
2026-07-06 SNC500 - Jul 6, 19:50 UTCJul 6, 20:05 UTC15m
2026-07-06 SNC326 - Jul 6, 16:55 UTCJul 6, 17:15 UTC20m
2026-07-06 SNC325 - Jul 6, 13:50 UTCJul 6, 14:10 UTC20m
2026-07-06 SNC491 - Jul 6, 09:05 UTCJul 6, 09:20 UTC15m
2026-07-06 SNC490 - Jul 6, 07:10 UTCJul 6, 07:25 UTC15m
2026-07-05 SNC111 - Jul 5, 21:50 UTCJul 5, 22:05 UTC15m
2026-07-05 SNC111 - Jul 5, 13:35 UTCJul 5, 13:55 UTC20m
2026-07-04 SNC111 - Jul 4, 21:10 UTCJul 4, 21:25 UTC15m
2026-07-04 SNC111 - Jul 4, 14:20 UTCJul 4, 14:40 UTC20m
2026-07-03 SNC111 - Jul 3, 23:10 UTCJul 3, 23:25 UTC15m
2026-07-03 SNC111 - Jul 3, 14:15 UTCJul 3, 14:40 UTC25m
2026-07-02 SNC962 - Jul 2, 23:55 UTCJul 3, 00:15 UTC20m
2026-07-02 SNC961 - Jul 2, 17:35 UTCJul 2, 17:50 UTC15m
2026-07-02 SNC111 - Jul 2, 01:10 UTCJul 2, 01:20 UTC10m
2026-07-01 SNC111 - Jul 1, 17:05 UTCJul 1, 17:25 UTC20m
2026-06-22 SNC7107 - Jun 22, 23:20 UTCJun 22, 23:35 UTC15m
2026-06-22 SNC8107 SJU → STT Jun 22, 14:29 UTCJun 22, 14:45 UTC15m
2026-05-18 SNC1301 STX → SJU May 18, 13:40 UTCMay 18, 13:55 UTC15m
2026-05-18 SNC1103 SJU → STX May 18, 11:20 UTCMay 18, 11:40 UTC20m
2026-05-17 SNC493 STX → SJU May 17, 10:40 UTCMay 17, 10:50 UTC10m
2026-05-17 SNC492 SJU → STX May 17, 08:55 UTCMay 17, 09:10 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 N376AC page for operator, model, and routing details .

Mode-S A44A18 frequently asked

What is Mode-S code A44A18?
A44A18 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N376AC.
Where is Mode-S A44A18 registered?
Mode-S code A44A18 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 A44A18 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 10:05 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A44A18, octal 51045030, decimal 10,766,872.
What flights does A44A18 operate?
Mode-S A44A18 has broadcast 20 distinct callsigns, including SNC111, SNC211, SNC210, SNC1103, SNC1301.