Apparatus

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sensors Mode-S transponder

AD727A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N966AK · BOEING 737 MAX 9 · operated by ALASKA AIRLINES INC

Hex
AD727A
Octal
53271172
Decimal
11,367,034
Country
US
Tail
N966AK
Type
B39M
No current signal · last broadcast Jul 26, 21:45 UTC
Flights observed
417
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:45 UTC

Last known position

Most recent position reported by Mode-S AD727A.

Country allocation

The ICAO 24-bit address AD727A 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
ASA312 - 6 2026-07-17
ASA753 Alaska Airlines 5 2026-06-11
ASA9411 Alaska Airlines 4 2026-04-17
ASA758 - 4 2026-07-17
ASA62 - 4 2026-07-18
ASA563 - 4 2026-06-20
ASA484 Alaska Airlines 4 2026-06-11
ASA245 Alaska Airlines 4 2026-07-25
ASA236 - 4 2026-07-16
ASA1383 Alaska Airlines 4 2026-05-15
ASA1366 Alaska Airlines 4 2026-05-07
ASA1324 Alaska Airlines 4 2026-05-06
ASA627 Alaska Airlines 3 2026-05-20
ASA535 - 3 2026-07-08
ASA507 Alaska Airlines 3 2026-05-10
ASA49 Alaska Airlines 3 2026-05-23
ASA460 Alaska Airlines 3 2026-07-22
ASA459 - 3 2026-06-24
ASA390 - 3 2026-06-28
ASA383 Alaska Airlines 3 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASA568 SJC → SEA Jul 26, 17:35 UTCJul 26, 21:40 UTC4h 5m
2026-07-26 ASA1314 PDX → LAX Jul 26, 13:20 UTCJul 26, 14:55 UTC1h 35m
2026-07-26 ASA1624 SAN → SJC Jul 26, 05:45 UTCJul 26, 06:40 UTC56m
2026-07-26 ASA203 SEA → SJC Jul 26, 02:50 UTCJul 26, 03:35 UTC45m
2026-07-25 ASA245 SEA → OGG Jul 25, 16:00 UTCJul 25, 16:50 UTC50m
2026-07-25 ASA54 ANC → LAS Jul 25, 10:25 UTCJul 25, 13:25 UTC3h 0m
2026-07-25 ASA39 JFK → SFO Jul 25, 03:30 UTCJul 25, 07:55 UTC4h 25m
2026-07-25 ASA39 JFK → SFO Jul 25, 03:29 UTCJul 25, 07:44 UTC4h 15m
2026-07-25 ASA373 SJC → SJD Jul 25, 00:20 UTCJul 25, 02:00 UTC1h 40m
2026-07-25 ASA373 SJC → SJD Jul 25, 00:20 UTCJul 25, 01:51 UTC1h 31m
2026-07-24 ASA384 SEA → BOS Jul 24, 21:05 UTCJul 24, 22:40 UTC1h 35m
2026-07-24 ASA383 BNA → SEA Jul 24, 18:05 UTCJul 24, 19:40 UTC1h 35m
2026-07-24 ASA283 EWR → PDX Jul 24, 11:25 UTCJul 24, 16:00 UTC4h 35m
2026-07-24 ASA280 EWR → SEA Jul 24, 05:20 UTCJul 24, 09:00 UTC3h 40m
2026-07-23 ASA469 BOS → PDX Jul 23, 23:20 UTCJul 24, 03:45 UTC4h 25m
2026-07-23 ASA1376 PDX → PVR Jul 23, 17:55 UTCJul 23, 21:40 UTC3h 45m
2026-07-23 ASA1376 PDX → PVR Jul 23, 17:52 UTCJul 23, 21:37 UTC3h 45m
2026-07-23 ASA311 SEA → SFO Jul 23, 10:45 UTCJul 23, 16:25 UTC5h 40m
2026-07-22 ASA460 SEA → BOS Jul 22, 23:00 UTCJul 23, 03:30 UTC4h 30m
2026-07-22 ASA603 - Jul 22, 18:35 UTCJul 22, 20:30 UTC1h 55m
2026-07-22 ASA603 PHX → SEA Jul 22, 18:32 UTCJul 22, 20:56 UTC2h 24m
2026-07-22 ASA746 PVR → LAX Jul 22, 01:40 UTCJul 22, 04:10 UTC2h 30m
2026-07-21 ASA742 SEA → SFO Jul 21, 22:01 UTCJul 22, 00:14 UTC2h 13m
2026-07-21 ASA742 SEA → SFO Jul 21, 22:05 UTCJul 22, 00:15 UTC2h 10m
2026-07-21 ASA593 ANC → PDX Jul 21, 18:10 UTCJul 21, 20:45 UTC2h 35m
2026-07-21 ASA625 PHX → SEA Jul 21, 12:05 UTCJul 21, 16:10 UTC4h 5m
2026-07-21 ASA624 SEA → IND Jul 21, 05:50 UTCJul 21, 09:05 UTC3h 15m
2026-07-20 ASA419 SFO → LAS Jul 20, 22:30 UTCJul 21, 03:50 UTC5h 20m
2026-07-20 ASA300 PDX → MCO Jul 20, 14:55 UTCJul 20, 20:25 UTC5h 30m
2026-07-20 ASA300 PDX → MCO Jul 20, 14:55 UTCJul 20, 20:12 UTC5h 17m
2026-07-19 ASA646 PDX → PHX Jul 19, 23:15 UTCJul 20, 02:40 UTC3h 25m
2026-07-19 ASA392 PDX → DFW Jul 19, 18:10 UTCJul 19, 21:24 UTC3h 14m
2026-07-19 ASA392 PDX → DFW Jul 19, 18:10 UTCJul 19, 21:35 UTC3h 25m
2026-07-19 ASA399 MCO → SFO Jul 19, 14:15 UTCJul 19, 16:10 UTC1h 55m
2026-07-19 ASA1388 LAX → SJD Jul 19, 01:10 UTCJul 19, 03:40 UTC2h 30m
2026-07-18 ASA62 - Jul 18, 21:30 UTCJul 18, 23:00 UTC1h 30m
2026-07-18 ASA62 - Jul 18, 19:45 UTCJul 18, 20:10 UTC25m
2026-07-18 ASA62 - Jul 18, 18:15 UTCJul 18, 18:30 UTC15m
2026-07-18 ASA62 - Jul 18, 15:20 UTCJul 18, 16:30 UTC1h 10m
2026-07-18 ASA667 SEA → ANC Jul 18, 04:00 UTCJul 18, 07:00 UTC3h 0m
2026-07-18 ASA667 SEA → ANC Jul 18, 03:58 UTCJul 18, 07:02 UTC3h 4m
2026-07-17 ASA312 - Jul 17, 20:35 UTCJul 17, 23:39 UTC3h 5m
2026-07-17 ASA312 OMA → SEA Jul 17, 20:38 UTCJul 17, 23:33 UTC2h 55m
2026-07-17 ASA312 - Jul 17, 16:34 UTCJul 17, 19:20 UTC2h 45m
2026-07-17 ASA323 - Jul 17, 13:20 UTCJul 17, 14:35 UTC1h 15m
2026-07-17 ASA323 RNO → SEA Jul 17, 13:13 UTCJul 17, 14:25 UTC1h 12m
2026-07-17 ASA736 - Jul 17, 04:39 UTCJul 17, 06:00 UTC1h 20m
2026-07-17 ASA758 SEA → SEA Jul 17, 03:05 UTCJul 17, 03:10 UTC5m
2026-07-17 ASA758 - Jul 17, 01:29 UTCJul 17, 03:10 UTC1h 40m
2026-07-17 ASA758 SFO → SEA Jul 17, 01:35 UTCJul 17, 02:47 UTC1h 12m

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 N966AK page for operator, model, and routing details .

Mode-S AD727A frequently asked

What is Mode-S code AD727A?
AD727A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N966AK.
Where is Mode-S AD727A registered?
Mode-S code AD727A 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 AD727A broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD727A, octal 53271172, decimal 11,367,034.
What flights does AD727A operate?
Mode-S AD727A has broadcast 20 distinct callsigns, including ASA312, ASA753, ASA9411, ASA758, ASA62.