Apparatus

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sensors Mode-S transponder

AB358D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N821LA · SIKORSKY UH-60 Black Hawk · operated by CONSOLIDATED FIRE PROTECTION DISTRICT OF LA COUNTY

Hex
AB358D
Octal
52632615
Decimal
11,220,365
Country
US
Tail
N821LA
Type
H60
No current signal · last broadcast 1d ago
Flights observed
145
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S AB358D.

Country allocation

The ICAO 24-bit address AB358D 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
N821LA - 145 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-22 N821LA - Jul 22, 23:10 UTCJul 22, 23:20 UTC10m
2026-07-22 N821LA - Jul 22, 21:50 UTCJul 22, 22:10 UTC20m
2026-07-15 N821LA - Jul 15, 20:55 UTCJul 15, 23:20 UTC2h 25m
2026-07-15 N821LA - Jul 15, 01:50 UTCJul 15, 03:05 UTC1h 15m
2026-07-14 N821LA - Jul 14, 21:55 UTCJul 14, 23:05 UTC1h 9m
2026-07-14 N821LA - Jul 14, 19:55 UTCJul 14, 20:45 UTC50m
2026-07-14 N821LA - Jul 14, 09:50 UTCJul 14, 10:00 UTC10m
2026-07-14 N821LA - Jul 14, 02:20 UTCJul 14, 05:20 UTC3h 0m
2026-07-13 N821LA - Jul 13, 20:05 UTCJul 13, 20:55 UTC50m
2026-07-12 N821LA - Jul 12, 18:45 UTCJul 12, 19:05 UTC20m
2026-07-12 N821LA - Jul 12, 02:25 UTCJul 12, 02:35 UTC10m
2026-07-12 N821LA - Jul 12, 00:25 UTCJul 12, 00:35 UTC10m
2026-07-11 N821LA - Jul 11, 18:55 UTCJul 11, 19:20 UTC25m
2026-07-11 N821LA - Jul 11, 12:35 UTCJul 11, 12:50 UTC15m
2026-07-11 N821LA - Jul 11, 10:05 UTCJul 11, 10:20 UTC15m
2026-07-02 N821LA - Jul 2, 16:45 UTCJul 2, 17:15 UTC30m
2026-07-02 N821LA - Jul 2, 05:10 UTCJul 2, 05:55 UTC45m
2026-07-02 N821LA - Jul 2, 02:35 UTCJul 2, 03:15 UTC40m
2026-07-01 N821LA - Jul 1, 16:40 UTCJul 1, 16:50 UTC10m
2026-06-30 N821LA - Jun 30, 03:25 UTCJun 30, 04:25 UTC1h 0m
2026-06-25 N821LA - Jun 25, 02:30 UTCJun 25, 02:45 UTC15m
2026-06-25 N821LA - Jun 25, 00:14 UTCJun 25, 01:09 UTC55m
2026-06-23 N821LA - Jun 23, 19:59 UTCJun 23, 20:40 UTC40m
2026-06-22 N821LA - Jun 22, 22:19 UTCJun 23, 00:00 UTC1h 40m
2026-06-21 N821LA - Jun 21, 19:29 UTCJun 21, 20:59 UTC1h 30m
2026-06-21 N821LA - Jun 21, 16:59 UTCJun 21, 18:00 UTC1h 0m
2026-06-20 N821LA - Jun 20, 20:14 UTCJun 20, 20:55 UTC40m
2026-06-20 N821LA - Jun 20, 13:44 UTCJun 20, 13:55 UTC10m
2026-06-19 N821LA - Jun 19, 19:19 UTCJun 19, 19:39 UTC20m
2026-06-19 N821LA - Jun 19, 14:09 UTCJun 19, 14:39 UTC30m
2026-06-19 N821LA - Jun 19, 04:00 UTCJun 19, 04:29 UTC30m
2026-06-19 N821LA - Jun 19, 02:09 UTCJun 19, 02:39 UTC30m
2026-06-19 N821LA - Jun 19, 00:29 UTCJun 19, 01:04 UTC35m
2026-06-18 N821LA - Jun 18, 21:35 UTCJun 18, 22:20 UTC45m
2026-06-17 N821LA - Jun 17, 22:05 UTCJun 17, 22:40 UTC35m
2026-06-17 N821LA - Jun 17, 18:15 UTCJun 17, 19:35 UTC1h 20m
2026-06-17 N821LA - Jun 17, 17:00 UTCJun 17, 17:15 UTC15m
2026-06-17 N821LA - Jun 17, 13:55 UTCJun 17, 14:05 UTC10m
2026-06-16 N821LA - Jun 16, 20:00 UTCJun 16, 21:00 UTC1h 0m
2026-06-16 N821LA - Jun 16, 14:30 UTCJun 16, 14:50 UTC20m
2026-06-16 N821LA - Jun 16, 03:00 UTCJun 16, 03:05 UTC5m
2026-06-15 N821LA - Jun 15, 14:20 UTCJun 15, 14:50 UTC30m
2026-06-14 N821LA - Jun 14, 14:20 UTCJun 14, 14:30 UTC10m
2026-06-13 N821LA - Jun 13, 17:50 UTCJun 13, 21:50 UTC4h 0m
2026-06-13 N821LA - Jun 13, 00:25 UTCJun 13, 01:15 UTC50m
2026-06-12 N821LA - Jun 12, 20:35 UTCJun 12, 21:10 UTC35m
2026-06-12 N821LA - Jun 12, 19:30 UTCJun 12, 19:40 UTC10m
2026-06-12 N821LA - Jun 12, 16:25 UTCJun 12, 16:35 UTC10m
2026-06-12 N821LA - Jun 12, 06:55 UTCJun 12, 07:20 UTC25m
2026-06-11 N821LA - Jun 11, 22:05 UTCJun 11, 23:00 UTC55m

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 N821LA page for operator, model, and routing details .

Mode-S AB358D frequently asked

What is Mode-S code AB358D?
AB358D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N821LA.
Where is Mode-S AB358D registered?
Mode-S code AB358D 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 AB358D broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB358D, octal 52632615, decimal 11,220,365.
What flights does AB358D operate?
Mode-S AB358D has broadcast 1 distinct callsign, including N821LA.