Apparatus

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sensors Mode-S transponder

AA7F8D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N776CK · BOEING 777-200LR · operated by UMB BANK NA TRUSTEE

Hex
AA7F8D
Octal
52477615
Decimal
11,173,773
Country
US
Tail
N776CK
Type
B77L
No current signal · last broadcast 26m ago
Flights observed
222
Distinct callsigns
20
Country
US
Last broadcast
26m ago

Last known position

Most recent position reported by Mode-S AA7F8D.

Country allocation

The ICAO 24-bit address AA7F8D 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
CKS273 - 21 2026-07-10
CKS253 - 20 2026-07-12
CKS270 - 18 2026-07-13
CKS247 Kalitta Air 15 2026-04-18
CKS272 - 12 2026-07-03
CKS248 Kalitta Air 11 2026-04-18
CKS242 - 11 2026-07-02
CKS241 Kalitta Air 11 2026-06-11
CKS256 Kalitta Air 8 2026-06-08
CKS252 Kalitta Air 8 2026-05-22
CKS206 - 8 2026-06-14
CKS202 - 8 2026-06-27
CKS290 - 7 2026-04-13
CKS243 Kalitta Air 7 2026-06-05
CKS271 - 5 2026-07-10
CKS200 - 5 2026-06-20
CKS291 - 4 2026-04-14
CKS287 Kalitta Air 4 2026-06-17
CKS255 - 4 2026-06-25
CKS285 Kalitta Air 3 2026-06-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 CKS270 - Jul 13, 23:15 UTCJul 14, 07:10 UTC7h 55m
2026-07-13 CKS264 - Jul 13, 08:10 UTCJul 13, 16:10 UTC8h 0m
2026-07-12 CKS263 - Jul 12, 20:45 UTCJul 13, 04:15 UTC7h 30m
2026-07-12 CKS253 - Jul 12, 16:30 UTCJul 12, 17:50 UTC1h 20m
2026-07-11 CKS253 ANC → JFK Jul 11, 14:05 UTCJul 11, 20:20 UTC6h 15m
2026-07-11 CKS253 - Jul 11, 04:40 UTCJul 11, 12:15 UTC7h 35m
2026-07-11 CKS253 - Jul 11, 02:30 UTCJul 11, 02:45 UTC15m
2026-07-10 CKS273 - Jul 10, 23:10 UTCJul 10, 23:35 UTC25m
2026-07-10 CKS273 - Jul 10, 14:05 UTCJul 10, 16:30 UTC2h 25m
2026-07-10 CKS271 - Jul 10, 05:25 UTCJul 10, 09:10 UTC3h 45m
2026-07-09 CKS270 - Jul 9, 08:40 UTCJul 9, 15:40 UTC7h 0m
2026-07-09 CKS270 - Jul 9, 04:05 UTCJul 9, 04:20 UTC15m
2026-07-08 CKS270 - Jul 8, 21:30 UTCJul 9, 03:00 UTC5h 30m
2026-07-07 CKS270 - Jul 7, 22:50 UTCJul 8, 02:35 UTC3h 45m
2026-07-06 CKS270 - Jul 6, 23:35 UTCJul 7, 12:00 UTC12h 25m
2026-07-05 CKS273 - Jul 5, 22:50 UTCJul 6, 04:25 UTC5h 35m
2026-07-05 CKS273 HKG → ANC Jul 5, 06:35 UTCJul 5, 16:05 UTC9h 30m
2026-07-04 CKS273 TLV → HKG Jul 4, 15:05 UTCJul 5, 01:00 UTC9h 55m
2026-07-04 CKS273 - Jul 4, 07:55 UTCJul 4, 11:40 UTC3h 45m
2026-07-03 CKS272 - Jul 3, 11:45 UTCJul 3, 18:20 UTC6h 35m
2026-07-03 CKS272 - Jul 3, 00:55 UTCJul 3, 07:05 UTC6h 10m
2026-07-02 CKS272 - Jul 2, 23:55 UTCJul 3, 00:05 UTC10m
2026-07-02 CKS242 - Jul 2, 13:35 UTCJul 2, 14:00 UTC25m
2026-07-02 CKS242 - Jul 2, 10:35 UTCJul 2, 13:00 UTC2h 25m
2026-07-01 CKS242 - Jul 1, 17:45 UTCJul 2, 06:00 UTC12h 15m
2026-07-01 CKS348 ANC → CVG Jul 1, 08:30 UTCJul 1, 14:40 UTC6h 10m
2026-06-30 CKS348 HKG → ANC Jun 30, 21:05 UTCJul 1, 06:25 UTC9h 20m
2026-06-30 CKS285 LAX → LEJ Jun 30, 15:20 UTCJun 30, 15:45 UTC25m
2026-06-30 CKS285 LAX → LEJ Jun 30, 05:00 UTCJun 30, 08:40 UTC3h 40m
2026-06-29 CKS285 LAX → LEJ Jun 29, 10:59 UTCJun 29, 18:44 UTC7h 45m
2026-06-28 CKS201 ORD → CVG Jun 28, 21:20 UTCJun 28, 21:59 UTC40m
2026-06-28 CKS201 - Jun 28, 12:25 UTCJun 28, 18:05 UTC5h 40m
2026-06-28 CKS201 HKG → ANC Jun 28, 01:19 UTCJun 28, 10:24 UTC9h 5m
2026-06-27 CKS202 - Jun 27, 13:24 UTCJun 27, 13:44 UTC20m
2026-06-27 CKS202 - Jun 27, 09:40 UTCJun 27, 12:45 UTC3h 5m
2026-06-26 CKS202 - Jun 26, 17:54 UTCJun 27, 06:19 UTC12h 25m
2026-06-25 CKS255 - Jun 25, 19:54 UTCJun 25, 21:25 UTC1h 30m
2026-06-25 CKS255 - Jun 25, 16:29 UTCJun 25, 17:34 UTC1h 5m
2026-06-24 CKS255 - Jun 24, 23:54 UTCJun 25, 14:14 UTC14h 20m
2026-06-24 CKS255 - Jun 24, 23:04 UTCJun 24, 23:24 UTC20m
2026-06-24 CKS254 - Jun 24, 12:40 UTCJun 24, 13:00 UTC20m
2026-06-24 CKS254 - Jun 24, 09:34 UTCJun 24, 12:09 UTC2h 35m
2026-06-23 CKS254 - Jun 23, 17:39 UTCJun 24, 06:25 UTC12h 45m
2026-06-23 CKS207 - Jun 23, 10:59 UTCJun 23, 14:29 UTC3h 30m
2026-06-22 CKS207 - Jun 22, 20:49 UTCJun 23, 08:54 UTC12h 5m
2026-06-22 CKS204 - Jun 22, 16:50 UTCJun 22, 17:00 UTC10m
2026-06-22 CKS204 - Jun 22, 13:10 UTCJun 22, 16:14 UTC3h 5m
2026-06-21 CKS204 - Jun 21, 22:20 UTCJun 22, 10:40 UTC12h 20m
2026-06-21 CKS295 ORD → CVG Jun 21, 18:29 UTCJun 21, 19:29 UTC1h 0m
2026-06-21 CKS295 ORD → CVG Jun 21, 11:05 UTCJun 21, 16:34 UTC5h 30m

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 N776CK page for operator, model, and routing details .

Mode-S AA7F8D frequently asked

What is Mode-S code AA7F8D?
AA7F8D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N776CK.
Where is Mode-S AA7F8D registered?
Mode-S code AA7F8D 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 AA7F8D broadcasting right now?
No active broadcast right now. Last signal was 26m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA7F8D, octal 52477615, decimal 11,173,773.
What flights does AA7F8D operate?
Mode-S AA7F8D has broadcast 20 distinct callsigns, including CKS273, CKS253, CKS270, CKS247, CKS272.