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sensors Mode-S transponder

A613E0

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N491AS · BOEING 737-900 · operated by ALASKA AIRLINES INC

Hex
A613E0
Octal
51411740
Decimal
10,884,064
Country
US
Tail
N491AS
Type
B739
No current signal · last broadcast 2h ago
Flights observed
398
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S A613E0.

Country allocation

The ICAO 24-bit address A613E0 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
ASA742 - 5 2026-06-28
ASA700 Alaska Airlines 5 2026-05-15
ASA270 - 5 2026-06-22
ASA211 Alaska Airlines 5 2026-05-11
ASA787 Alaska Airlines 4 2026-06-07
ASA725 Alaska Airlines 4 2026-06-30
ASA682 Alaska Airlines 4 2026-06-08
ASA662 Alaska Airlines 4 2026-05-16
ASA650 - 4 2026-07-03
ASA637 Alaska Airlines 4 2026-06-09
ASA622 Alaska Airlines 4 2026-04-23
ASA598 Alaska Airlines 4 2026-06-16
ASA593 - 4 2026-06-28
ASA389 - 4 2026-07-03
ASA383 Alaska Airlines 4 2026-06-07
ASA355 Alaska Airlines 4 2026-04-17
ASA352 Alaska Airlines 4 2026-05-31
ASA31 - 4 2026-06-18
ASA25 Alaska Airlines 4 2026-04-15
ASA221 Alaska Airlines 4 2026-04-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 ASA1601 - Jul 14, 04:25 UTCJul 14, 05:35 UTC1h 10m
2026-07-13 ASA437 - Jul 13, 18:20 UTCJul 14, 00:50 UTC6h 30m
2026-07-13 ASA581 PDX → LAX Jul 13, 14:20 UTCJul 13, 16:30 UTC2h 10m
2026-07-13 ASA1434 MSP → PDX Jul 13, 01:25 UTCJul 13, 04:30 UTC3h 5m
2026-07-12 ASA509 - Jul 12, 23:30 UTCJul 13, 00:01 UTC30m
2026-07-12 ASA509 - Jul 12, 19:15 UTCJul 12, 22:10 UTC2h 55m
2026-07-12 ASA82 ANC → SEA Jul 12, 14:05 UTCJul 12, 17:10 UTC3h 5m
2026-07-12 ASA1545 - Jul 12, 06:05 UTCJul 12, 08:01 UTC1h 55m
2026-07-12 ASA1545 ORD → ANC Jul 12, 06:03 UTCJul 12, 12:05 UTC6h 2m
2026-07-12 ASA538 SEA → ORD Jul 12, 01:10 UTCJul 12, 04:30 UTC3h 20m
2026-07-11 ASA582 - Jul 11, 21:20 UTCJul 11, 23:30 UTC2h 10m
2026-07-11 ASA692 SEA → PSP Jul 11, 17:48 UTCJul 11, 20:00 UTC2h 12m
2026-07-11 ASA692 - Jul 11, 17:35 UTCJul 11, 19:55 UTC2h 20m
2026-07-11 ASA1473 - Jul 11, 13:35 UTCJul 11, 15:50 UTC2h 15m
2026-07-11 ASA1398 - Jul 11, 03:30 UTCJul 11, 06:01 UTC2h 30m
2026-07-10 ASA503 AUS → SEA Jul 10, 21:45 UTCJul 11, 01:35 UTC3h 50m
2026-07-10 ASA422 SEA → AUS Jul 10, 17:00 UTCJul 10, 20:25 UTC3h 25m
2026-07-10 ASA1314 SJC → SEA Jul 10, 13:35 UTCJul 10, 15:20 UTC1h 45m
2026-07-10 ASA1310 SEA → SJC Jul 10, 03:45 UTCJul 10, 05:25 UTC1h 40m
2026-07-09 ASA494 - Jul 9, 21:50 UTCJul 10, 01:35 UTC3h 45m
2026-07-09 ASA494 - Jul 9, 16:55 UTCJul 9, 20:25 UTC3h 30m
2026-07-09 ASA563 - Jul 9, 11:45 UTCJul 9, 15:00 UTC3h 15m
2026-07-09 ASA564 - Jul 9, 01:40 UTCJul 9, 04:45 UTC3h 5m
2026-07-08 ASA618 STL → SEA Jul 8, 20:15 UTCJul 9, 00:10 UTC3h 55m
2026-07-08 ASA618 SEA → STL Jul 8, 15:15 UTCJul 8, 18:35 UTC3h 20m
2026-07-08 ASA206 PDX → SFO Jul 8, 12:35 UTCJul 8, 13:30 UTC55m
2026-07-08 ASA353 - Jul 8, 01:05 UTCJul 8, 01:50 UTC45m
2026-07-07 ASA1633 SJC → PDX Jul 7, 21:25 UTCJul 7, 22:45 UTC1h 20m
2026-07-07 ASA1632 PDX → SJC Jul 7, 19:00 UTCJul 7, 20:25 UTC1h 25m
2026-07-07 ASA498 SEA → PDX Jul 7, 04:55 UTCJul 7, 05:25 UTC30m
2026-07-06 ASA412 - Jul 6, 22:45 UTCJul 7, 03:20 UTC4h 35m
2026-07-06 ASA412 SEA → PIT Jul 6, 16:50 UTCJul 6, 20:55 UTC4h 5m
2026-07-06 ASA1409 SMF → SEA Jul 6, 13:35 UTCJul 6, 14:55 UTC1h 20m
2026-07-06 ASA1409 SMF → SEA Jul 6, 13:20 UTCJul 6, 14:40 UTC1h 20m
2026-07-06 ASA1621 SAN → SMF Jul 6, 06:30 UTCJul 6, 07:40 UTC1h 10m
2026-07-06 ASA1388 - Jul 6, 02:15 UTCJul 6, 04:40 UTC2h 25m
2026-07-05 ASA286 SEA → SEA Jul 5, 18:50 UTCJul 5, 23:00 UTC4h 10m
2026-07-05 ASA82 ANC → SEA Jul 5, 14:00 UTCJul 5, 17:10 UTC3h 10m
2026-07-05 ASA1363 SEA → ANC Jul 5, 07:05 UTCJul 5, 10:20 UTC3h 15m
2026-07-05 ASA583 ORD → SEA Jul 5, 01:15 UTCJul 5, 05:10 UTC3h 55m
2026-07-04 ASA346 SEA → ORD Jul 4, 19:10 UTCJul 4, 23:40 UTC4h 30m
2026-07-04 ASA459 BOS → SEA Jul 4, 11:35 UTCJul 4, 17:10 UTC5h 35m
2026-07-04 ASA255 - Jul 4, 04:10 UTCJul 4, 09:15 UTC5h 5m
2026-07-03 ASA389 BOS → SAN Jul 3, 21:03 UTCJul 4, 02:44 UTC5h 41m
2026-07-03 ASA389 - Jul 3, 21:05 UTCJul 4, 02:50 UTC5h 45m
2026-07-03 ASA358 PDX → BNH Jul 3, 14:15 UTCJul 3, 19:20 UTC5h 5m
2026-07-03 ASA650 PHX → PDX Jul 3, 04:40 UTCJul 3, 07:00 UTC2h 20m
2026-07-03 ASA744 SEA → PHX Jul 3, 00:40 UTCJul 3, 03:05 UTC2h 25m
2026-07-02 ASA580 BUR → SEA Jul 2, 20:35 UTCJul 2, 22:50 UTC2h 15m
2026-07-02 ASA580 BUR → SEA Jul 2, 20:33 UTCJul 2, 22:38 UTC2h 5m

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 N491AS page for operator, model, and routing details .

Mode-S A613E0 frequently asked

What is Mode-S code A613E0?
A613E0 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N491AS.
Where is Mode-S A613E0 registered?
Mode-S code A613E0 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 A613E0 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A613E0, octal 51411740, decimal 10,884,064.
What flights does A613E0 operate?
Mode-S A613E0 has broadcast 20 distinct callsigns, including ASA742, ASA700, ASA270, ASA211, ASA787.