Apparatus

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sensors Mode-S transponder

A706EA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N552AS · BOEING 737-800 · operated by ALASKA AIRLINES INC

Hex
A706EA
Octal
51603352
Decimal
10,946,282
Country
US
Tail
N552AS
Type
B738
No current signal · last broadcast Jul 26, 03:40 UTC
Flights observed
468
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 03:40 UTC

Last known position

Most recent position reported by Mode-S A706EA.

Country allocation

The ICAO 24-bit address A706EA 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
ASA702 - 9 2026-07-11
ASA268 Alaska Airlines 9 2026-06-08
ASA589 - 7 2026-07-03
ASA750 Alaska Airlines 6 2026-07-25
ASA400 - 6 2026-07-17
ASA588 - 5 2026-07-18
ASA555 - 5 2026-06-22
ASA493 Alaska Airlines 5 2026-05-27
ASA1350 Alaska Airlines 5 2026-05-12
ASA1325 - 5 2026-07-22
ASA784 - 4 2026-07-12
ASA760 Alaska Airlines 4 2026-07-24
ASA71 Alaska Airlines 4 2026-04-16
ASA66 Alaska Airlines 4 2026-06-16
ASA576 Alaska Airlines 4 2026-06-08
ASA401 Alaska Airlines 4 2026-04-18
ASA210 - 4 2026-07-17
ASA1422 Alaska Airlines 4 2026-04-17
ASA1391 Alaska Airlines 4 2026-05-28
ASA1355 - 4 2026-07-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASA605 SFO → LAS Jul 26, 01:25 UTCJul 26, 03:40 UTC2h 15m
2026-07-25 ASA674 SEA → YYZ Jul 25, 21:35 UTCJul 26, 00:10 UTC2h 35m
2026-07-25 ASA716 SFO → SAN Jul 25, 17:55 UTCJul 25, 20:15 UTC2h 20m
2026-07-25 ASA750 SNA → PDX Jul 25, 14:15 UTCJul 25, 16:05 UTC1h 50m
2026-07-25 ASA750 SNA → PDX Jul 25, 14:10 UTCJul 25, 16:04 UTC1h 54m
2026-07-25 ASA631 LAS → SFO Jul 25, 02:40 UTCJul 25, 05:05 UTC2h 25m
2026-07-24 ASA760 SNA → SEA Jul 24, 22:20 UTCJul 25, 00:30 UTC2h 10m
2026-07-24 ASA760 SNA → SEA Jul 24, 22:17 UTCJul 25, 00:16 UTC1h 59m
2026-07-24 ASA1357 PVR → SFO Jul 24, 18:30 UTCJul 24, 20:55 UTC2h 25m
2026-07-24 ASA1357 PVR → SFO Jul 24, 18:34 UTCJul 24, 20:49 UTC2h 15m
2026-07-24 ASA748 SFO → LAS Jul 24, 14:30 UTCJul 24, 16:30 UTC2h 0m
2026-07-24 ASA748 SFO → LAS Jul 24, 14:27 UTCJul 24, 16:23 UTC1h 56m
2026-07-24 ASA1563 ANC → LAX Jul 24, 07:45 UTCJul 24, 12:40 UTC4h 55m
2026-07-24 ASA1544 ANC → OME Jul 24, 03:00 UTCJul 24, 04:05 UTC1h 5m
2026-07-24 ASA1544 ANC → OME Jul 24, 00:25 UTCJul 24, 01:25 UTC1h 0m
2026-07-23 ASA657 JFK → SFO Jul 23, 19:40 UTCJul 23, 23:10 UTC3h 30m
2026-07-23 ASA1426 LAX → ZIH Jul 23, 16:10 UTCJul 23, 17:55 UTC1h 45m
2026-07-23 ASA1310 SFO → DAL Jul 23, 04:00 UTCJul 23, 05:55 UTC1h 55m
2026-07-22 ASA537 BOS → SEA Jul 22, 23:00 UTCJul 23, 01:00 UTC2h 0m
2026-07-22 ASA529 LAS → SFO Jul 22, 19:20 UTCJul 22, 21:35 UTC2h 15m
2026-07-22 ASA1325 - Jul 22, 14:10 UTCJul 22, 16:15 UTC2h 5m
2026-07-22 ASA1325 SNA → SEA Jul 22, 14:09 UTCJul 22, 16:11 UTC2h 2m
2026-07-22 ASA631 LAS → SFO Jul 22, 02:35 UTCJul 22, 05:00 UTC2h 25m
2026-07-21 ASA425 SFO → BOS Jul 21, 21:55 UTCJul 22, 00:25 UTC2h 30m
2026-07-21 ASA747 - Jul 21, 17:55 UTCJul 21, 20:30 UTC2h 35m
2026-07-20 ASA674 SEA → YYZ Jul 20, 21:25 UTCJul 21, 00:00 UTC2h 34m
2026-07-20 ASA716 SFO → SAN Jul 20, 17:40 UTCJul 20, 19:55 UTC2h 15m
2026-07-20 ASA750 - Jul 20, 14:20 UTCJul 20, 16:15 UTC1h 55m
2026-07-20 ASA518 SEA → SLC Jul 20, 03:15 UTCJul 20, 05:25 UTC2h 10m
2026-07-19 ASA1369 - Jul 19, 20:45 UTCJul 20, 02:05 UTC5h 20m
2026-07-19 ASA374 SJD → SJC Jul 19, 14:30 UTCJul 19, 18:50 UTC4h 20m
2026-07-19 ASA207 LAX → PDX Jul 19, 04:45 UTCJul 19, 06:30 UTC1h 45m
2026-07-19 ASA278 PDX → LAX Jul 19, 00:55 UTCJul 19, 03:00 UTC2h 5m
2026-07-18 ASA712 - Jul 18, 21:25 UTCJul 18, 23:20 UTC1h 55m
2026-07-18 ASA588 - Jul 18, 18:15 UTCJul 18, 20:25 UTC2h 10m
2026-07-18 ASA588 PDX → SNA Jul 18, 18:13 UTCJul 18, 20:22 UTC2h 9m
2026-07-18 ASA750 - Jul 18, 14:20 UTCJul 18, 16:20 UTC2h 0m
2026-07-18 ASA518 SEA → SLC Jul 18, 03:45 UTCJul 18, 05:50 UTC2h 5m
2026-07-17 ASA1434 SJC → SJD Jul 17, 23:30 UTCJul 18, 02:45 UTC3h 15m
2026-07-17 ASA509 SEA → MSP Jul 17, 19:09 UTCJul 17, 22:00 UTC2h 50m
2026-07-17 ASA210 FAI → SEA Jul 17, 13:35 UTCJul 17, 16:59 UTC3h 25m
2026-07-17 ASA1512 - Jul 17, 08:04 UTCJul 17, 11:15 UTC3h 10m
2026-07-17 ASA400 SBA → SEA Jul 17, 03:39 UTCJul 17, 05:39 UTC2h 0m
2026-07-17 ASA400 SEA → SBA Jul 17, 00:25 UTCJul 17, 02:34 UTC2h 10m
2026-07-16 ASA332 ANC → SEA Jul 16, 19:50 UTCJul 16, 22:55 UTC3h 5m
2026-07-16 ASA332 ANC → SEA Jul 16, 19:47 UTCJul 16, 22:38 UTC2h 51m
2026-07-16 ASA232 - Jul 16, 17:25 UTCJul 16, 18:10 UTC45m
2026-07-16 ASA231 ANC → ADQ Jul 16, 15:30 UTCJul 16, 16:15 UTC45m
2026-07-16 ASA46 - Jul 16, 05:05 UTCJul 16, 05:45 UTC40m
2026-07-16 ASA45 - Jul 16, 02:35 UTCJul 16, 03:15 UTC40m

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 N552AS page for operator, model, and routing details .

Mode-S A706EA frequently asked

What is Mode-S code A706EA?
A706EA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N552AS.
Where is Mode-S A706EA registered?
Mode-S code A706EA 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 A706EA broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 03:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A706EA, octal 51603352, decimal 10,946,282.
What flights does A706EA operate?
Mode-S A706EA has broadcast 20 distinct callsigns, including ASA702, ASA268, ASA589, ASA750, ASA400.