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sensors Mode-S transponder

A668EE

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N512AS · BOEING 737-800 · operated by WILMINGTON TRUST CO TRUSTEE

Hex
A668EE
Octal
51464356
Decimal
10,905,838
Country
US
Tail
N512AS
Type
B738
Transponder active on ground
Flights observed
411
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A668EE.

Country allocation

The ICAO 24-bit address A668EE 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
ASA1405 - 11 2026-07-11
ASA699 - 9 2026-07-11
ASA703 - 6 2026-06-27
ASA313 Alaska Airlines 5 2026-06-11
ASA279 Alaska Airlines 5 2026-06-03
ASA1466 - 5 2026-06-19
ASA798 - 4 2026-06-29
ASA64 - 4 2026-06-28
ASA532 - 4 2026-04-13
ASA1478 - 4 2026-06-18
ASA789 Alaska Airlines 3 2026-07-09
ASA702 - 3 2026-07-08
ASA7 - 3 2026-07-13
ASA686 - 3 2026-07-07
ASA589 - 3 2026-07-12
ASA588 - 3 2026-07-05
ASA47 Alaska Airlines 3 2026-04-28
ASA468 Alaska Airlines 3 2026-05-27
ASA467 Alaska Airlines 3 2026-04-28
ASA458 Alaska Airlines 3 2026-06-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 ASA693 - Jul 14, 19:10 UTCJul 14, 19:30 UTC20m
2026-07-14 ASA693 - Jul 14, 14:30 UTCJul 14, 15:20 UTC50m
2026-07-13 ASA7 DCA → SFO Jul 13, 23:35 UTCJul 14, 04:40 UTC5h 5m
2026-07-13 ASA8 - Jul 13, 16:50 UTCJul 13, 21:45 UTC4h 55m
2026-07-13 ASA1603 LAX → SFO Jul 13, 14:30 UTCJul 13, 15:20 UTC50m
2026-07-12 ASA617 - Jul 12, 17:45 UTCJul 13, 06:15 UTC12h 30m
2026-07-12 ASA1611 GEG → LAX Jul 12, 13:25 UTCJul 12, 15:55 UTC2h 30m
2026-07-12 ASA1356 PDX → GEG Jul 12, 05:10 UTCJul 12, 05:50 UTC40m
2026-07-12 ASA589 - Jul 12, 01:25 UTCJul 12, 03:15 UTC1h 50m
2026-07-11 ASA264 - Jul 11, 22:01 UTCJul 12, 00:15 UTC2h 15m
2026-07-11 ASA1405 - Jul 11, 18:20 UTCJul 11, 20:10 UTC1h 50m
2026-07-11 ASA1405 SNA → PDX Jul 11, 18:19 UTCJul 11, 20:10 UTC1h 51m
2026-07-11 ASA699 SEA → SNA Jul 11, 13:45 UTCJul 11, 16:10 UTC2h 25m
2026-07-10 ASA234 - Jul 10, 22:50 UTCJul 11, 04:10 UTC5h 20m
2026-07-10 ASA220 - Jul 10, 15:40 UTCJul 10, 21:10 UTC5h 30m
2026-07-09 ASA228 - Jul 9, 21:05 UTCJul 9, 21:20 UTC15m
2026-07-09 ASA228 LIH → SAN Jul 9, 21:03 UTCJul 10, 02:02 UTC4h 59m
2026-07-09 ASA789 SFO → KOA Jul 9, 14:15 UTCJul 9, 19:05 UTC4h 50m
2026-07-09 ASA788 - Jul 9, 02:20 UTCJul 9, 06:55 UTC4h 35m
2026-07-09 ASA788 LIH → SFO Jul 9, 02:11 UTCJul 9, 06:52 UTC4h 41m
2026-07-08 ASA258 - Jul 8, 19:35 UTCJul 9, 00:45 UTC5h 10m
2026-07-08 ASA702 - Jul 8, 15:20 UTCJul 8, 17:40 UTC2h 20m
2026-07-08 ASA518 - Jul 8, 03:10 UTCJul 8, 05:15 UTC2h 5m
2026-07-07 ASA686 SEA → PDX Jul 7, 23:45 UTCJul 8, 00:15 UTC30m
2026-07-07 ASA548 - Jul 7, 19:30 UTCJul 7, 21:45 UTC2h 15m
2026-07-07 ASA759 - Jul 7, 15:40 UTCJul 7, 18:00 UTC2h 20m
2026-07-07 ASA423 SEA → SAT Jul 7, 12:30 UTCJul 7, 13:40 UTC1h 10m
2026-07-07 ASA1524 DTW → SEA Jul 7, 05:00 UTCJul 7, 05:50 UTC50m
2026-07-06 ASA1434 SJC → SJD Jul 6, 23:35 UTCJul 7, 02:45 UTC3h 10m
2026-07-06 ASA1434 SJC → SJD Jul 6, 23:31 UTCJul 7, 02:44 UTC3h 13m
2026-07-06 ASA509 SEA → MSP Jul 6, 19:15 UTCJul 6, 22:00 UTC2h 45m
2026-07-06 ASA651 PHX → SEA Jul 6, 15:10 UTCJul 6, 17:10 UTC2h 0m
2026-07-06 ASA91 - Jul 6, 04:45 UTCJul 6, 06:30 UTC1h 45m
2026-07-06 ASA430 PDX → SEA Jul 6, 00:45 UTCJul 6, 01:10 UTC25m
2026-07-05 ASA712 - Jul 5, 21:10 UTCJul 5, 23:10 UTC2h 0m
2026-07-05 ASA588 - Jul 5, 17:45 UTCJul 5, 19:55 UTC2h 10m
2026-07-04 ASA1405 - Jul 4, 18:10 UTCJul 4, 20:10 UTC2h 0m
2026-07-04 ASA699 - Jul 4, 14:15 UTCJul 4, 16:30 UTC2h 15m
2026-07-04 ASA594 PDX → SFO Jul 4, 04:35 UTCJul 4, 06:50 UTC2h 15m
2026-07-04 ASA592 CUN → SFO Jul 4, 01:00 UTCJul 4, 03:00 UTC2h 0m
2026-07-03 ASA286 SEA → SEA Jul 3, 18:50 UTCJul 3, 23:05 UTC4h 15m
2026-07-03 ASA444 BUR → SEA Jul 3, 14:45 UTCJul 3, 17:05 UTC2h 20m
2026-07-03 ASA1408 SJC → GDL Jul 3, 02:40 UTCJul 3, 04:40 UTC2h 0m
2026-07-02 ASA510 MSP → SEA Jul 2, 22:10 UTCJul 3, 01:20 UTC3h 10m
2026-07-02 ASA1429 SJD → SFO Jul 2, 18:10 UTCJul 2, 21:00 UTC2h 50m
2026-07-02 ASA1429 SJD → SFO Jul 2, 18:07 UTCJul 2, 20:58 UTC2h 51m
2026-07-02 ASA750 SNA → PDX Jul 2, 14:20 UTCJul 2, 16:25 UTC2h 5m
2026-07-02 ASA631 LAS → SFO Jul 2, 02:40 UTCJul 2, 04:50 UTC2h 10m
2026-07-01 ASA510 MSP → SEA Jul 1, 22:05 UTCJul 2, 01:15 UTC3h 10m
2026-07-01 ASA1429 SJD → SFO Jul 1, 17:40 UTCJul 1, 20:35 UTC2h 55m

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 N512AS page for operator, model, and routing details .

Mode-S A668EE frequently asked

What is Mode-S code A668EE?
A668EE is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N512AS.
Where is Mode-S A668EE registered?
Mode-S code A668EE 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 A668EE broadcasting right now?
Mode-S A668EE is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A668EE, octal 51464356, decimal 10,905,838.
What flights does A668EE operate?
Mode-S A668EE has broadcast 20 distinct callsigns, including ASA1405, ASA699, ASA703, ASA313, ASA279.