Apparatus

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sensors Mode-S transponder

AC81D3

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N905AV · operated by UMB BANK NA TRUSTEE

Hex
AC81D3
Octal
53100723
Decimal
11,305,427
Country
US
Tail
N905AV
Type
A20N
Broadcasting now · callsign TAI568 · 35,025 ft
Flights observed
301
Distinct callsigns
20
Country
US
Last broadcast
33m ago

Current position

AC81D3 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AC81D3 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
TAI563 - 12 2026-07-11
TAI562 - 12 2026-07-11
LRC640 - 12 2026-06-20
TAI553 - 10 2026-07-07
TAI552 - 10 2026-07-07
LRC650 - 10 2026-07-03
LRC641 LACSA 9 2026-06-20
TAI561 Avianca El Salvador 8 2026-06-02
LRC651 - 8 2026-07-03
LRC604 - 8 2026-06-21
TAI560 Avianca El Salvador 7 2026-06-01
TAI568 - 6 2026-07-14
TAI444 - 6 2026-07-13
TAI325 - 6 2026-06-16
TAI324 - 6 2026-06-16
LRC605 - 6 2026-06-21
TAI569 Avianca El Salvador 5 2026-05-22
TAI445 - 5 2026-07-13
TAI583 - 4 2026-07-12
TAI582 - 4 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 TAI568 - Jul 14, 04:55 UTCJul 14, 06:45 UTC1h 50m
2026-07-13 TAI445 - Jul 13, 21:25 UTCJul 14, 01:45 UTC4h 20m
2026-07-13 TAI444 - Jul 13, 14:05 UTCJul 13, 18:45 UTC4h 40m
2026-07-13 TAI579 - Jul 13, 11:35 UTCJul 13, 11:50 UTC15m
2026-07-13 TAI578 - Jul 13, 04:40 UTCJul 13, 04:55 UTC15m
2026-07-12 TAI583 - Jul 12, 22:05 UTCJul 13, 01:55 UTC3h 50m
2026-07-12 TAI582 - Jul 12, 15:55 UTCJul 12, 19:50 UTC3h 55m
2026-07-11 TAI563 - Jul 11, 21:45 UTCJul 12, 03:05 UTC5h 20m
2026-07-11 TAI562 - Jul 11, 14:05 UTCJul 11, 19:05 UTC5h 0m
2026-07-10 TAI563 - Jul 10, 21:40 UTCJul 11, 03:20 UTC5h 40m
2026-07-10 TAI562 - Jul 10, 14:05 UTCJul 10, 19:10 UTC5h 5m
2026-07-09 TAI393 - Jul 9, 22:15 UTCJul 10, 00:05 UTC1h 50m
2026-07-09 TAI392 - Jul 9, 18:10 UTCJul 9, 20:05 UTC1h 55m
2026-07-08 TAI431 - Jul 8, 23:10 UTCJul 9, 00:40 UTC1h 30m
2026-07-08 LRC632 SJO → MEX Jul 8, 19:00 UTCJul 8, 21:20 UTC2h 20m
2026-07-08 TAI559 - Jul 8, 09:40 UTCJul 8, 14:30 UTC4h 50m
2026-07-08 TAI558 - Jul 8, 00:50 UTCJul 8, 06:15 UTC5h 25m
2026-07-07 TAI553 - Jul 7, 21:20 UTCJul 7, 21:35 UTC15m
2026-07-07 TAI553 - Jul 7, 19:30 UTCJul 7, 19:40 UTC10m
2026-07-07 TAI553 - Jul 7, 14:50 UTCJul 7, 18:55 UTC4h 5m
2026-07-07 TAI552 - Jul 7, 08:05 UTCJul 7, 12:40 UTC4h 35m
2026-07-07 TAI552 - Jul 7, 07:25 UTCJul 7, 07:35 UTC10m
2026-07-07 TAI578 - Jul 7, 04:45 UTCJul 7, 05:05 UTC20m
2026-07-06 TAI553 - Jul 6, 21:15 UTCJul 6, 21:30 UTC15m
2026-07-06 TAI553 - Jul 6, 15:00 UTCJul 6, 20:00 UTC5h 0m
2026-07-06 TAI552 - Jul 6, 08:20 UTCJul 6, 12:50 UTC4h 30m
2026-07-06 TAI552 - Jul 6, 07:45 UTCJul 6, 07:50 UTC5m
2026-07-06 TAI552 - Jul 6, 06:15 UTCJul 6, 06:30 UTC15m
2026-07-06 TAI585 - Jul 6, 00:05 UTCJul 6, 04:00 UTC3h 55m
2026-07-05 TAI584 SAL → IAD Jul 5, 18:25 UTCJul 5, 22:15 UTC3h 50m
2026-07-04 TAI527 - Jul 4, 22:05 UTCJul 5, 02:15 UTC4h 10m
2026-07-04 TAI526 - Jul 4, 15:15 UTCJul 4, 20:10 UTC4h 55m
2026-07-04 LRC661 - Jul 4, 07:05 UTCJul 4, 11:05 UTC4h 0m
2026-07-04 LRC660 - Jul 4, 00:50 UTCJul 4, 05:05 UTC4h 15m
2026-07-03 TAI555 - Jul 3, 22:00 UTCJul 3, 22:15 UTC15m
2026-07-03 LRC651 CUN → GUA Jul 3, 19:15 UTCJul 3, 20:25 UTC1h 10m
2026-07-03 LRC650 GUA → CUN Jul 3, 16:15 UTCJul 3, 17:40 UTC1h 25m
2026-07-03 TAI554 - Jul 3, 14:35 UTCJul 3, 14:50 UTC15m
2026-07-02 TAI445 - Jul 2, 20:55 UTCJul 3, 01:25 UTC4h 30m
2026-07-02 TAI444 - Jul 2, 14:05 UTCJul 2, 18:35 UTC4h 30m
2026-07-02 TAI591 - Jul 2, 08:15 UTCJul 2, 12:00 UTC3h 45m
2026-07-02 TAI590 - Jul 2, 03:00 UTCJul 2, 06:25 UTC3h 25m
2026-07-01 TAI431 - Jul 1, 23:20 UTCJul 2, 00:55 UTC1h 35m
2026-07-01 LRC632 SJO → MEX Jul 1, 19:20 UTCJul 1, 21:10 UTC1h 50m
2026-07-01 TAI559 - Jul 1, 09:35 UTCJul 1, 14:30 UTC4h 55m
2026-07-01 TAI558 - Jul 1, 00:55 UTCJul 1, 06:25 UTC5h 30m
2026-06-30 LRC651 - Jun 30, 21:15 UTCJun 30, 22:20 UTC1h 5m
2026-06-30 LRC650 - Jun 30, 18:35 UTCJun 30, 19:50 UTC1h 15m
2026-06-30 TAI327 YYZ → SAL Jun 30, 06:30 UTCJun 30, 10:45 UTC4h 15m
2026-06-29 TAI326 SAL → YYZ Jun 29, 23:44 UTCJun 30, 04:10 UTC4h 26m

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 N905AV page for operator, model, and routing details .

Mode-S AC81D3 frequently asked

What is Mode-S code AC81D3?
AC81D3 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N905AV.
Where is Mode-S AC81D3 registered?
Mode-S code AC81D3 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 AC81D3 broadcasting right now?
Yes. Mode-S AC81D3 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC81D3, octal 53100723, decimal 11,305,427.
What flights does AC81D3 operate?
Mode-S AC81D3 has broadcast 20 distinct callsigns, including TAI563, TAI562, LRC640, TAI553, TAI552.