Apparatus

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sensors Mode-S transponder

A29428

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N26514 · CESSNA 402 Businessliner · operated by HYANNIS AIR SERVICE INC

Hex
A29428
Octal
50512050
Decimal
10,654,760
Country
US
Tail
N26514
Type
C402
No current signal · last broadcast 1h ago
Flights observed
18
Distinct callsigns
4
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A29428.

Country allocation

The ICAO 24-bit address A29428 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 4 distinct

Callsign Airline Flights Last seen
KAP87 Cape Air 11 2026-04-18
KAP13 Cape Air 4 2026-04-16
KAP6 Cape Air 2 2026-04-15
KAP161 Cape Air 1 2026-04-14

Recent flights last 18

DateFlightRouteTakeoffLandingDuration
2026-04-18 KAP87 STT → STX Apr 18, 17:30 UTCApr 18, 17:45 UTC15m
2026-04-18 KAP87 STT → STX Apr 18, 16:00 UTCApr 18, 16:10 UTC10m
2026-04-18 KAP87 STT → STX Apr 18, 14:30 UTCApr 18, 14:40 UTC10m
2026-04-18 KAP87 STT → STX Apr 18, 13:00 UTCApr 18, 13:10 UTC10m
2026-04-18 KAP87 STT → STX Apr 18, 11:55 UTCApr 18, 12:10 UTC15m
2026-04-17 KAP87 STT → STX Apr 17, 22:30 UTCApr 17, 22:40 UTC10m
2026-04-17 KAP87 STT → STX Apr 17, 21:35 UTCApr 17, 21:45 UTC10m
2026-04-17 KAP87 STT → STX Apr 17, 20:20 UTCApr 17, 20:30 UTC10m
2026-04-17 KAP87 STT → STX Apr 17, 14:30 UTCApr 17, 14:40 UTC10m
2026-04-17 KAP87 STT → STX Apr 17, 13:05 UTCApr 17, 13:15 UTC10m
2026-04-17 KAP87 STT → STX Apr 17, 12:20 UTCApr 17, 12:30 UTC10m
2026-04-16 KAP13 BOS → MVY Apr 16, 21:24 UTCApr 16, 21:39 UTC15m
2026-04-16 KAP13 BOS → MVY Apr 16, 18:30 UTCApr 16, 18:45 UTC15m
2026-04-16 KAP13 BOS → MVY Apr 16, 15:30 UTCApr 16, 15:50 UTC20m
2026-04-16 KAP13 BOS → MVY Apr 16, 12:24 UTCApr 16, 12:34 UTC10m
2026-04-15 KAP6 ACK → BOS Apr 15, 21:30 UTCApr 15, 21:40 UTC10m
2026-04-15 KAP6 ACK → BOS Apr 15, 12:05 UTCApr 15, 12:15 UTC10m
2026-04-14 KAP161 VQS → SJU Apr 14, 15:10 UTCApr 14, 15:30 UTC20m

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 N26514 page for operator, model, and routing details .

Mode-S A29428 frequently asked

What is Mode-S code A29428?
A29428 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N26514.
Where is Mode-S A29428 registered?
Mode-S code A29428 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 A29428 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A29428, octal 50512050, decimal 10,654,760.
What flights does A29428 operate?
Mode-S A29428 has broadcast 4 distinct callsigns, including KAP87, KAP13, KAP6, KAP161.