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
No current signal · last broadcast 5d ago
Flights observed
157
Distinct callsigns
20
Country
US
Last broadcast
5d ago

Last known position

Most recent position reported by Mode-S AC81D3.

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 Avianca El Salvador 7 2026-05-23
TAI562 Avianca El Salvador 7 2026-05-23
TAI561 Avianca El Salvador 7 2026-05-04
LRC640 LACSA 7 2026-05-15
LRC604 LACSA 7 2026-05-17
TAI560 Avianca El Salvador 6 2026-05-03
LRC650 LACSA 6 2026-05-13
TAI569 Avianca El Salvador 5 2026-05-22
TAI568 Avianca El Salvador 5 2026-05-22
TAI325 Avianca El Salvador 5 2026-04-28
TAI324 Avianca El Salvador 5 2026-04-28
LRC651 LACSA 5 2026-05-13
LRC605 LACSA 5 2026-05-17
LRC699 LACSA 4 2026-05-20
LRC692 LACSA 4 2026-05-21
LRC655 LACSA 4 2026-05-20
LRC641 LACSA 4 2026-05-15
LRC698 LACSA 3 2026-05-20
LRC697 LACSA 3 2026-05-20
LRC696 LACSA 3 2026-04-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-24 TAI369 SAL → MDE May 24, 16:05 UTCMay 24, 21:10 UTC5h 5m
2026-05-24 TAI581 IAD → SAL May 24, 09:55 UTCMay 24, 13:35 UTC3h 40m
2026-05-24 TAI580 SAL → IAD May 24, 04:30 UTCMay 24, 07:55 UTC3h 25m
2026-05-23 TAI563 SFO → SAL May 23, 21:40 UTCMay 24, 02:40 UTC5h 0m
2026-05-23 TAI562 SAL → SFO May 23, 14:00 UTCMay 23, 19:45 UTC5h 45m
2026-05-22 TAI569 JFK → SAL May 22, 11:05 UTCMay 22, 15:10 UTC4h 5m
2026-05-22 TAI568 SAL → JFK May 22, 05:10 UTCMay 22, 09:00 UTC3h 50m
2026-05-21 TAI563 SFO → SAL May 21, 21:50 UTCMay 22, 02:40 UTC4h 50m
2026-05-21 TAI562 SAL → SFO May 21, 14:00 UTCMay 21, 19:50 UTC5h 50m
2026-05-21 LRC692 BOG → SJO May 21, 04:00 UTCMay 21, 04:15 UTC15m
2026-05-20 LRC699 SJO → BOG May 20, 23:50 UTCMay 21, 00:05 UTC15m
2026-05-20 LRC698 BOG → SJO May 20, 19:20 UTCMay 20, 19:35 UTC15m
2026-05-20 LRC697 SJO → BOG May 20, 17:05 UTCMay 20, 17:25 UTC20m
2026-05-20 LRC655 GUA → SJO May 20, 13:00 UTCMay 20, 13:25 UTC25m
2026-05-20 LRC655 GUA → SJO May 20, 07:40 UTCMay 20, 11:25 UTC3h 45m
2026-05-20 LRC654 GUA → IAD May 20, 02:20 UTCMay 20, 06:05 UTC3h 46m
2026-05-19 LRC633 MEX → SJO May 19, 19:10 UTCMay 20, 00:45 UTC5h 35m
2026-05-19 TAI430 SAL → MEX May 19, 14:55 UTCMay 19, 16:35 UTC1h 40m
2026-05-19 TAI529 LAX → SAL May 19, 07:40 UTCMay 19, 12:05 UTC4h 25m
2026-05-19 TAI528 SAL → LAX May 19, 00:30 UTCMay 19, 05:10 UTC4h 40m
2026-05-18 TAI384 BOG → SAL May 18, 14:30 UTCMay 18, 16:20 UTC1h 50m
2026-05-18 LRC691 IAD → SAL May 18, 09:15 UTCMay 18, 09:35 UTC20m
2026-05-18 LRC692 BOG → SJO May 18, 03:55 UTCMay 18, 04:11 UTC15m
2026-05-17 LRC605 LAX → SJO May 17, 18:35 UTCMay 17, 23:45 UTC5h 10m
2026-05-17 LRC604 SJO → LAX May 17, 04:00 UTCMay 17, 16:35 UTC12h 35m
2026-05-16 LRC699 SJO → BOG May 16, 23:30 UTCMay 16, 23:50 UTC20m
2026-05-16 LRC605 LAX → SJO May 16, 18:30 UTCMay 16, 20:25 UTC1h 55m
2026-05-16 LRC604 SJO → LAX May 16, 04:05 UTCMay 16, 16:20 UTC12h 16m
2026-05-15 LRC641 LAX → GUA May 15, 21:45 UTCMay 16, 02:00 UTC4h 15m
2026-05-15 LRC640 GUA → LAX May 15, 14:55 UTCMay 15, 19:40 UTC4h 45m
2026-05-15 LRC640 GUA → LAX May 15, 14:40 UTCMay 15, 14:45 UTC5m
2026-05-15 LRC692 BOG → SJO May 15, 04:05 UTCMay 15, 13:05 UTC9h 0m
2026-05-14 LRC699 SJO → BOG May 14, 23:40 UTCMay 15, 00:00 UTC20m
2026-05-14 LRC605 LAX → SJO May 14, 18:20 UTCMay 14, 20:25 UTC2h 5m
2026-05-14 LRC604 SJO → LAX May 14, 14:05 UTCMay 14, 16:15 UTC2h 10m
2026-05-13 TAI555 IAD → GUA May 13, 21:45 UTCMay 13, 22:00 UTC15m
2026-05-13 LRC651 CUN → SAL May 13, 20:15 UTCMay 13, 20:35 UTC20m
2026-05-13 LRC651 CUN → SAL May 13, 19:15 UTCMay 13, 19:45 UTC30m
2026-05-13 LRC650 SJO → GUA May 13, 16:15 UTCMay 13, 17:40 UTC1h 25m
2026-05-13 TAI554 SAL → GUA May 13, 14:35 UTCMay 13, 14:55 UTC20m
2026-05-12 TAI425 IAH → SAL May 12, 22:50 UTCMay 13, 01:05 UTC2h 15m
2026-05-12 TAI424 SAL → IAH May 12, 18:25 UTCMay 12, 20:50 UTC2h 25m
2026-05-12 LRC659 JFK → SAL May 12, 10:55 UTCMay 12, 15:20 UTC4h 25m
2026-05-12 LRC658 SAL → JFK May 12, 05:00 UTCMay 12, 08:50 UTC3h 50m
2026-05-11 TAI563 SFO → SAL May 11, 21:35 UTCMay 11, 22:35 UTC59m
2026-05-11 TAI562 SAL → SFO May 11, 14:05 UTCMay 11, 19:25 UTC5h 21m
2026-05-10 TAI523 LAX → SAL May 10, 20:54 UTCMay 11, 01:20 UTC4h 25m
2026-05-10 TAI522 SAL → LAX May 10, 14:25 UTCMay 10, 19:05 UTC4h 40m
2026-05-10 TAI591 IAD → SAL May 10, 08:10 UTCMay 10, 12:00 UTC3h 50m
2026-05-10 TAI590 SAL → IAD May 10, 02:45 UTCMay 10, 06:25 UTC3h 40m

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?
No active broadcast right now. Last signal was 5d ago.
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, TAI561, LRC640, LRC604.