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sensors Mode-S transponder

A7888C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N585AS · BOEING 737-800 · operated by ALASKA AIRLINES INC

Hex
A7888C
Octal
51704214
Decimal
10,979,468
Country
US
Tail
N585AS
Type
B738
No current signal · last broadcast Jul 26, 23:00 UTC
Flights observed
357
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 23:00 UTC

Last known position

Most recent position reported by Mode-S A7888C.

Country allocation

The ICAO 24-bit address A7888C 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
ASA67 - 10 2026-06-26
ASA9 - 6 2026-07-13
ASA1618 Alaska Airlines 6 2026-06-23
ASA9800 - 4 2026-07-02
ASA8 Alaska Airlines 4 2026-06-28
ASA7 - 4 2026-06-28
ASA64 - 4 2026-07-04
ASA620 - 4 2026-06-29
ASA510 - 4 2026-07-09
ASA468 Alaska Airlines 4 2026-06-06
ASA425 Alaska Airlines 4 2026-06-09
ASA4 - 4 2026-07-13
ASA322 - 4 2026-07-19
ASA249 - 4 2026-06-21
ASA9460 Alaska Airlines 3 2026-05-16
ASA753 Alaska Airlines 3 2026-05-17
ASA699 Alaska Airlines 3 2026-06-01
ASA658 Alaska Airlines 3 2026-05-24
ASA650 Alaska Airlines 3 2026-05-30
ASA621 Alaska Airlines 3 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASA1319 SFO → PDX Jul 26, 21:20 UTCJul 26, 23:00 UTC1h 40m
2026-07-26 ASA390 SAN → BOS Jul 26, 14:40 UTCJul 26, 19:55 UTC5h 15m
2026-07-25 ASA573 SJC → SEA Jul 25, 22:55 UTCJul 26, 04:05 UTC5h 10m
2026-07-25 ASA233 SAN → EWR Jul 25, 16:10 UTCJul 25, 21:00 UTC4h 50m
2026-07-25 ASA1620 SEA → LAX Jul 25, 13:25 UTCJul 25, 14:20 UTC55m
2026-07-25 ASA291 MCI → SEA Jul 25, 06:05 UTCJul 25, 07:10 UTC1h 5m
2026-07-25 ASA780 SEA → ABQ Jul 25, 00:35 UTCJul 25, 03:00 UTC2h 25m
2026-07-24 ASA549 ZIH → SFO Jul 24, 19:40 UTCJul 24, 22:55 UTC3h 15m
2026-07-24 ASA1 DCA → SEA Jul 24, 12:15 UTCJul 24, 17:40 UTC5h 25m
2026-07-23 ASA2 SEA → DCA Jul 23, 21:15 UTCJul 24, 01:30 UTC4h 15m
2026-07-23 ASA230 SMF → SEA Jul 23, 14:08 UTCJul 23, 19:12 UTC5h 4m
2026-07-23 ASA230 SMF → SEA Jul 23, 13:45 UTCJul 23, 19:15 UTC5h 30m
2026-07-23 ASA314 PDX → SFO Jul 23, 06:00 UTCJul 23, 10:25 UTC4h 25m
2026-07-23 ASA314 PDX → SFO Jul 23, 06:08 UTCJul 23, 10:08 UTC4h 0m
2026-07-23 ASA1301 LAX → SEA Jul 23, 01:30 UTCJul 23, 03:35 UTC2h 5m
2026-07-22 ASA713 SFO → JAC Jul 22, 21:55 UTCJul 23, 00:00 UTC2h 5m
2026-07-22 ASA621 PDX → SFO Jul 22, 19:08 UTCJul 22, 19:57 UTC49m
2026-07-22 ASA621 PDX → SFO Jul 22, 18:50 UTCJul 22, 20:00 UTC1h 10m
2026-07-22 ASA485 CHS → SEA Jul 22, 15:30 UTCJul 22, 16:45 UTC1h 15m
2026-07-22 ASA485 CHS → SEA Jul 22, 15:35 UTCJul 22, 16:43 UTC1h 8m
2026-07-21 ASA646 PDX → PHX Jul 21, 23:20 UTCJul 22, 02:40 UTC3h 20m
2026-07-21 ASA392 PDX → DFW Jul 21, 18:30 UTCJul 21, 21:50 UTC3h 20m
2026-07-21 ASA1643 - Jul 21, 15:05 UTCJul 21, 16:15 UTC1h 10m
2026-07-21 ASA1616 PDX → RNO Jul 21, 01:25 UTCJul 21, 02:35 UTC1h 10m
2026-07-20 ASA229 LAS → SEA Jul 20, 23:20 UTCJul 21, 00:15 UTC54m
2026-07-20 ASA441 MSY → SEA Jul 20, 20:10 UTCJul 20, 21:10 UTC1h 0m
2026-07-20 ASA482 BZE → SEA Jul 20, 16:15 UTCJul 20, 18:20 UTC2h 5m
2026-07-20 ASA1390 - Jul 20, 04:35 UTCJul 20, 06:50 UTC2h 15m
2026-07-20 ASA1390 SEA → LAX Jul 20, 04:31 UTCJul 20, 06:39 UTC2h 8m
2026-07-19 ASA322 DFW → SEA Jul 19, 23:36 UTCJul 20, 02:57 UTC3h 21m
2026-07-19 ASA322 - Jul 19, 23:25 UTCJul 20, 03:00 UTC3h 35m
2026-07-19 ASA341 LAX → SFO Jul 19, 18:15 UTCJul 19, 21:40 UTC3h 25m
2026-07-19 ASA479 LAS → SEA Jul 19, 14:30 UTCJul 19, 16:25 UTC1h 55m
2026-07-19 ASA605 - Jul 19, 01:30 UTCJul 19, 03:45 UTC2h 15m
2026-07-18 ASA674 - Jul 18, 21:50 UTCJul 19, 00:25 UTC2h 35m
2026-07-18 ASA716 SFO → SAN Jul 18, 18:00 UTCJul 18, 20:30 UTC2h 30m
2026-07-18 ASA562 BUR → PDX Jul 18, 14:30 UTCJul 18, 16:15 UTC1h 45m
2026-07-18 ASA559 PDX → BUR Jul 18, 01:25 UTCJul 18, 03:30 UTC2h 6m
2026-07-17 ASA267 ANC → PDX Jul 17, 20:35 UTCJul 18, 00:00 UTC3h 25m
2026-07-17 ASA79 SEA → ANC Jul 17, 15:25 UTCJul 17, 18:29 UTC3h 5m
2026-07-17 ASA423 - Jul 17, 13:00 UTCJul 17, 14:04 UTC1h 5m
2026-07-17 ASA1524 PDX → BOI Jul 17, 05:50 UTCJul 17, 06:40 UTC50m
2026-07-16 ASA1319 BOS → PDX Jul 16, 22:45 UTCJul 17, 04:39 UTC5h 55m
2026-07-16 ASA390 - Jul 16, 14:40 UTCJul 16, 19:55 UTC5h 15m
2026-07-16 ASA1466 ORD → SAN Jul 16, 01:45 UTCJul 16, 05:15 UTC3h 30m
2026-07-15 ASA1478 - Jul 15, 20:10 UTCJul 16, 00:15 UTC4h 5m
2026-07-15 ASA15 - Jul 15, 14:05 UTCJul 15, 18:30 UTC4h 25m
2026-07-14 ASA14 - Jul 14, 21:45 UTCJul 15, 02:30 UTC4h 44m
2026-07-14 ASA256 BOS → SAN Jul 14, 12:58 UTCJul 14, 17:53 UTC4h 55m
2026-07-14 ASA256 BOS → SAN Jul 14, 12:50 UTCJul 14, 18:10 UTC5h 20m

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 N585AS page for operator, model, and routing details .

Mode-S A7888C frequently asked

What is Mode-S code A7888C?
A7888C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N585AS.
Where is Mode-S A7888C registered?
Mode-S code A7888C 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 A7888C broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 23:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A7888C, octal 51704214, decimal 10,979,468.
What flights does A7888C operate?
Mode-S A7888C has broadcast 20 distinct callsigns, including ASA67, ASA9, ASA1618, ASA9800, ASA8.