Apparatus

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sensors Mode-S transponder

AC7E18

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N904AR · BOEING 747-400 · operated by UMB BANK NA TRUSTEE

Hex
AC7E18
Octal
53077030
Decimal
11,304,472
Country
US
Tail
N904AR
Type
B744
No current signal · last broadcast Jul 26, 19:30 UTC
Flights observed
195
Distinct callsigns
9
Country
US
Last broadcast
Jul 26, 19:30 UTC

Last known position

Most recent position reported by Mode-S AC7E18.

Country allocation

The ICAO 24-bit address AC7E18 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 9 distinct

Callsign Airline Flights Last seen
KYE9520 SkyLease Cargo 65 2026-05-31
KYE9723 SkyLease Cargo 50 2026-07-26
KYE9724 SkyLease Cargo 40 2026-07-26
KYE9521 SkyLease Cargo 20 2026-05-30
KYE9525 SkyLease Cargo 10 2026-04-25
KYE7551 SkyLease Cargo 4 2026-05-14
KYE7522 SkyLease Cargo 3 2026-05-15
KYE4514 SkyLease Cargo 2 2026-05-17
KYE4515 SkyLease Cargo 1 2026-05-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KYE9724 EHU → ANC Jul 26, 17:55 UTCJul 26, 19:30 UTC1h 35m
2026-07-26 KYE9723 LAX → ICN Jul 26, 11:50 UTCJul 26, 12:05 UTC15m
2026-07-26 KYE9723 LAX → ICN Jul 26, 05:10 UTCJul 26, 05:45 UTC35m
2026-07-25 KYE9723 LAX → ICN Jul 25, 13:25 UTCJul 26, 03:00 UTC13h 35m
2026-07-25 KYE9724 EHU → ANC Jul 25, 01:45 UTCJul 25, 07:05 UTC5h 20m
2026-07-24 KYE9724 EHU → ANC Jul 24, 17:00 UTCJul 25, 00:05 UTC7h 5m
2026-07-24 KYE9723 LAX → ICN Jul 24, 11:20 UTCJul 24, 11:30 UTC10m
2026-07-24 KYE9723 LAX → ICN Jul 24, 03:40 UTCJul 24, 07:20 UTC3h 40m
2026-07-23 KYE9723 LAX → ICN Jul 23, 13:00 UTCJul 24, 01:55 UTC12h 55m
2026-07-21 KYE9724 EHU → ANC Jul 21, 23:55 UTCJul 22, 14:30 UTC14h 35m
2026-07-21 KYE9723 LAX → ICN Jul 21, 18:05 UTCJul 21, 18:15 UTC10m
2026-07-21 KYE9723 LAX → ICN Jul 21, 11:55 UTCJul 21, 12:30 UTC35m
2026-07-20 KYE9723 LAX → ICN Jul 20, 20:10 UTCJul 21, 10:00 UTC13h 50m
2026-07-20 KYE9724 EHU → ANC Jul 20, 09:00 UTCJul 20, 14:40 UTC5h 40m
2026-07-19 KYE9724 EHU → ANC Jul 19, 23:30 UTCJul 20, 06:50 UTC7h 20m
2026-07-19 KYE9723 LAX → ICN Jul 19, 10:15 UTCJul 19, 12:50 UTC2h 35m
2026-07-18 KYE9723 LAX → ICN Jul 18, 20:20 UTCJul 19, 08:10 UTC11h 50m
2026-07-18 KYE9723 LAX → ICN Jul 18, 17:15 UTCJul 18, 17:30 UTC15m
2026-07-11 KYE9724 LAX → SBD Jul 11, 16:30 UTCJul 11, 16:55 UTC25m
2026-07-11 KYE9724 - Jul 11, 10:30 UTCJul 11, 14:00 UTC3h 30m
2026-07-11 KYE9724 ANC → ORD Jul 11, 03:30 UTCJul 11, 09:00 UTC5h 30m
2026-07-10 KYE9724 - Jul 10, 18:25 UTCJul 11, 01:55 UTC7h 30m
2026-07-10 KYE9723 - Jul 10, 03:45 UTCJul 10, 05:20 UTC1h 35m
2026-07-09 KYE9723 - Jul 9, 12:55 UTCJul 10, 00:50 UTC11h 55m
2026-07-08 KYE9724 - Jul 8, 21:50 UTCJul 9, 03:15 UTC5h 25m
2026-07-08 KYE9724 - Jul 8, 12:20 UTCJul 8, 19:50 UTC7h 30m
2026-07-08 KYE9723 - Jul 8, 00:10 UTCJul 8, 00:20 UTC10m
2026-07-07 KYE9723 - Jul 7, 20:40 UTCJul 7, 23:25 UTC2h 45m
2026-07-07 KYE9723 ORD → ICN Jul 7, 05:25 UTCJul 7, 18:55 UTC13h 30m
2026-07-06 KYE9724 - Jul 6, 06:05 UTCJul 6, 11:30 UTC5h 25m
2026-07-05 KYE9724 - Jul 5, 20:45 UTCJul 6, 04:15 UTC7h 30m
2026-07-05 KYE9723 - Jul 5, 15:15 UTCJul 5, 15:25 UTC10m
2026-07-05 KYE9723 - Jul 5, 07:55 UTCJul 5, 11:45 UTC3h 50m
2026-07-04 KYE9723 ORD → ICN Jul 4, 16:20 UTCJul 5, 05:40 UTC13h 20m
2026-07-04 KYE9724 ANC → ORD Jul 4, 03:30 UTCJul 4, 08:55 UTC5h 25m
2026-07-03 KYE9724 - Jul 3, 12:15 UTCJul 4, 01:40 UTC13h 25m
2026-07-03 KYE9723 - Jul 3, 04:25 UTCJul 3, 09:15 UTC4h 50m
2026-07-02 KYE9723 - Jul 2, 14:35 UTCJul 3, 02:35 UTC12h 0m
2026-07-01 KYE9724 EHU → ANC Jul 1, 22:35 UTCJul 2, 04:05 UTC5h 30m
2026-07-01 KYE9724 EHU → ANC Jul 1, 08:20 UTCJul 1, 20:55 UTC12h 35m
2026-06-30 KYE9723 LAX → ICN Jun 30, 21:05 UTCJul 1, 00:45 UTC3h 40m
2026-06-30 KYE9723 LAX → ICN Jun 30, 05:45 UTCJun 30, 18:55 UTC13h 10m
2026-06-29 KYE9724 EHU → ANC Jun 29, 03:39 UTCJun 29, 09:05 UTC5h 25m
2026-06-28 KYE9724 EHU → ANC Jun 28, 13:04 UTCJun 29, 01:44 UTC12h 40m
2026-06-28 KYE9723 LAX → ICN Jun 28, 05:49 UTCJun 28, 09:45 UTC3h 55m
2026-06-27 KYE9723 LAX → ICN Jun 27, 13:15 UTCJun 28, 02:20 UTC13h 5m
2026-06-26 KYE9724 EHU → ANC Jun 26, 18:34 UTCJun 26, 22:55 UTC4h 20m
2026-06-26 KYE9724 EHU → ANC Jun 26, 03:45 UTCJun 26, 16:54 UTC13h 10m
2026-06-25 KYE9723 LAX → ICN Jun 25, 20:05 UTCJun 26, 00:30 UTC4h 25m
2026-06-25 KYE9723 LAX → ICN Jun 25, 05:25 UTCJun 25, 18:15 UTC12h 50m

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 N904AR page for operator, model, and routing details .

Mode-S AC7E18 frequently asked

What is Mode-S code AC7E18?
AC7E18 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N904AR.
Where is Mode-S AC7E18 registered?
Mode-S code AC7E18 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 AC7E18 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC7E18, octal 53077030, decimal 11,304,472.
What flights does AC7E18 operate?
Mode-S AC7E18 has broadcast 9 distinct callsigns, including KYE9520, KYE9723, KYE9724, KYE9521, KYE9525.