Apparatus

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sensors Mode-S transponder

A4C164

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N405YK · BOEING 737-400 · operated by NAS AIRCRAFT LEASING COMPANY LLC

Hex
A4C164
Octal
51140544
Decimal
10,797,412
Country
US
Tail
N405YK
Type
B734
Broadcasting now · 9,500 ft
Flights observed
255
Distinct callsigns
20
Country
US
Last broadcast
3h ago

Current position

A4C164 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A4C164 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
AAH57 Aloha Air Cargo 13 2026-05-19
AAH27 Aloha Air Cargo 13 2026-05-30
AAH18 Aloha Air Cargo 13 2026-05-23
AAH17 Aloha Air Cargo 13 2026-05-27
AAH56 Aloha Air Cargo 12 2026-05-19
AAH26 Aloha Air Cargo 12 2026-05-30
AAH553 Aloha Air Cargo 11 2026-05-19
AAH552 Aloha Air Cargo 11 2026-05-19
AAH15 Aloha Air Cargo 11 2026-05-27
AAH442 Aloha Air Cargo 10 2026-05-29
AAH55 Aloha Air Cargo 9 2026-05-27
AAH445 Aloha Air Cargo 9 2026-05-25
AAH443 Aloha Air Cargo 9 2026-05-29
AAH54 Aloha Air Cargo 8 2026-05-27
AAH444 Aloha Air Cargo 8 2026-05-25
AAH221 Aloha Air Cargo 7 2026-05-19
AAH551 Aloha Air Cargo 6 2026-04-30
AAH220 Aloha Air Cargo 6 2026-05-19
AAH16 Aloha Air Cargo 6 2026-05-20
AAH550 Aloha Air Cargo 5 2026-04-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 AAH27 OGG → HNL May 30, 04:35 UTCMay 30, 05:00 UTC25m
2026-05-30 AAH26 HNL → OGG May 30, 02:55 UTCMay 30, 03:15 UTC20m
2026-05-29 AAH443 KOA → HNL May 29, 16:20 UTCMay 29, 16:55 UTC35m
2026-05-29 AAH442 HNL → KOA May 29, 15:25 UTCMay 29, 15:50 UTC25m
2026-05-29 AAH47 KOA → HNL May 29, 14:05 UTCMay 29, 14:35 UTC30m
2026-05-29 AAH46 HNL → KOA May 29, 12:55 UTCMay 29, 13:25 UTC30m
2026-05-27 AAH17 HNL → LIH May 27, 15:35 UTCMay 27, 15:45 UTC10m
2026-05-27 AAH15 HNL → LIH May 27, 13:00 UTCMay 27, 13:10 UTC10m
2026-05-27 AAH11 HNL → LIH May 27, 07:45 UTCMay 27, 07:55 UTC10m
2026-05-27 AAH43 KOA → HNL May 27, 05:49 UTCMay 27, 06:20 UTC30m
2026-05-27 AAH55 ITO → HNL May 27, 04:24 UTCMay 27, 04:34 UTC10m
2026-05-27 AAH54 HNL → ITO May 27, 02:09 UTCMay 27, 02:29 UTC20m
2026-05-26 AAH443 KOA → HNL May 26, 16:40 UTCMay 26, 17:09 UTC30m
2026-05-26 AAH442 HNL → KOA May 26, 15:20 UTCMay 26, 15:49 UTC30m
2026-05-25 AAH445 KOA → HNL May 25, 19:25 UTCMay 25, 19:59 UTC35m
2026-05-25 AAH444 HNL → KOA May 25, 18:20 UTCMay 25, 18:50 UTC30m
2026-05-25 AAH443 KOA → HNL May 25, 16:55 UTCMay 25, 17:20 UTC25m
2026-05-25 AAH442 HNL → KOA May 25, 15:25 UTCMay 25, 15:55 UTC30m
2026-05-23 AAH18 LIH → HNL May 23, 17:10 UTCMay 23, 17:20 UTC10m
2026-05-23 AAH17 HNL → LIH May 23, 15:55 UTCMay 23, 16:05 UTC10m
2026-05-23 AAH15 HNL → LIH May 23, 13:15 UTCMay 23, 13:25 UTC10m
2026-05-21 AAH18 LIH → HNL May 21, 16:50 UTCMay 21, 17:00 UTC10m
2026-05-21 AAH17 HNL → LIH May 21, 15:40 UTCMay 21, 15:55 UTC15m
2026-05-21 AAH15 HNL → LIH May 21, 14:45 UTCMay 21, 14:55 UTC10m
2026-05-21 AAH15 HNL → LIH May 21, 13:30 UTCMay 21, 13:45 UTC15m
2026-05-20 AAH18 LIH → HNL May 20, 16:25 UTCMay 20, 16:40 UTC15m
2026-05-20 AAH17 HNL → LIH May 20, 15:30 UTCMay 20, 15:45 UTC15m
2026-05-20 AAH16 LIH → HNL May 20, 14:30 UTCMay 20, 14:40 UTC10m
2026-05-20 AAH15 HNL → LIH May 20, 13:20 UTCMay 20, 13:35 UTC15m
2026-05-19 AAH553 ITO → HNL May 19, 16:05 UTCMay 19, 16:35 UTC30m
2026-05-19 AAH552 KOA → ITO May 19, 14:55 UTCMay 19, 15:15 UTC20m
2026-05-19 AAH57 ITO → HNL May 19, 13:20 UTCMay 19, 13:50 UTC30m
2026-05-19 AAH56 HNL → ITO May 19, 12:00 UTCMay 19, 12:20 UTC20m
2026-05-19 AAH221 OGG → HNL May 19, 08:20 UTCMay 19, 08:40 UTC20m
2026-05-19 AAH220 HNL → OGG May 19, 06:50 UTCMay 19, 07:10 UTC20m
2026-05-19 AAH27 OGG → HNL May 19, 04:15 UTCMay 19, 04:40 UTC25m
2026-05-19 AAH26 HNL → OGG May 19, 02:45 UTCMay 19, 03:05 UTC20m
2026-05-18 AAH553 ITO → HNL May 18, 16:05 UTCMay 18, 16:35 UTC30m
2026-05-18 AAH552 KOA → ITO May 18, 14:55 UTCMay 18, 15:15 UTC20m
2026-05-18 AAH57 ITO → HNL May 18, 13:05 UTCMay 18, 13:35 UTC30m
2026-05-18 AAH56 HNL → ITO May 18, 11:35 UTCMay 18, 11:55 UTC20m
2026-05-17 AAH41 KOA → HNL May 17, 16:40 UTCMay 17, 17:10 UTC30m
2026-05-17 AAH40 HNL → KOA May 17, 15:35 UTCMay 17, 16:01 UTC25m
2026-05-16 AAH18 LIH → HNL May 16, 17:40 UTCMay 16, 17:50 UTC10m
2026-05-16 AAH17 HNL → LIH May 16, 16:15 UTCMay 16, 16:31 UTC15m
2026-05-16 AAH16 LIH → HNL May 16, 14:55 UTCMay 16, 15:05 UTC10m
2026-05-16 AAH15 HNL → LIH May 16, 13:46 UTCMay 16, 14:01 UTC15m
2026-05-15 AAH18 LIH → HNL May 15, 17:15 UTCMay 15, 17:30 UTC15m
2026-05-15 AAH17 HNL → LIH May 15, 16:10 UTCMay 15, 16:25 UTC15m
2026-05-15 AAH15 HNL → LIH May 15, 13:30 UTCMay 15, 13:45 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 N405YK page for operator, model, and routing details .

Mode-S A4C164 frequently asked

What is Mode-S code A4C164?
A4C164 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N405YK.
Where is Mode-S A4C164 registered?
Mode-S code A4C164 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 A4C164 broadcasting right now?
Yes. Mode-S A4C164 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4C164, octal 51140544, decimal 10,797,412.
What flights does A4C164 operate?
Mode-S A4C164 has broadcast 20 distinct callsigns, including AAH57, AAH27, AAH18, AAH17, AAH56.