Apparatus

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sensors Mode-S transponder

A1CC1F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N215AK · BOEING 737-900 · operated by ALASKA AIRLINES INC

Hex
A1CC1F
Octal
50346037
Decimal
10,603,551
Country
US
Tail
N215AK
Type
B739
Broadcasting now · callsign ASA623 · 34,000 ft
Flights observed
485
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 19:55 UTC

Current position

A1CC1F is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A1CC1F 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
ASA508 Alaska Airlines 8 2026-06-11
ASA595 Alaska Airlines 6 2026-05-14
ASA706 - 5 2026-07-08
ASA577 Alaska Airlines 5 2026-06-19
ASA576 Alaska Airlines 5 2026-06-19
ASA555 Alaska Airlines 5 2026-05-18
ASA779 - 4 2026-06-19
ASA682 - 4 2026-06-29
ASA628 - 4 2026-07-01
ASA527 Alaska Airlines 4 2026-04-30
ASA500 Alaska Airlines 4 2026-06-10
ASA349 Alaska Airlines 4 2026-05-15
ASA255 Alaska Airlines 4 2026-06-22
ASA18 Alaska Airlines 4 2026-06-04
ASA778 - 3 2026-06-19
ASA755 Alaska Airlines 3 2026-05-25
ASA647 - 3 2026-06-29
ASA645 Alaska Airlines 3 2026-07-19
ASA625 Alaska Airlines 3 2026-06-09
ASA600 Alaska Airlines 3 2026-05-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASA1699 ONT → PDX Jul 26, 18:10 UTCJul 26, 19:55 UTC1h 45m
2026-07-26 ASA1449 SFO → SEA Jul 26, 14:55 UTCJul 26, 17:00 UTC2h 5m
2026-07-26 ASA498 SAN → PDX Jul 26, 05:00 UTCJul 26, 05:30 UTC30m
2026-07-26 ASA1399 MZT → LAX Jul 26, 00:35 UTCJul 26, 02:30 UTC1h 55m
2026-07-25 ASA1604 SFO → LAX Jul 25, 22:00 UTCJul 25, 23:00 UTC1h 0m
2026-07-25 ASA1604 SFO → LAX Jul 25, 21:59 UTCJul 25, 22:47 UTC48m
2026-07-25 ASA321 SJC → SEA Jul 25, 16:05 UTCJul 25, 20:35 UTC4h 30m
2026-07-25 ASA1899 LAX → ANC Jul 25, 02:40 UTCJul 25, 07:15 UTC4h 35m
2026-07-24 ASA1419 GDL → LAX Jul 24, 22:21 UTCJul 25, 00:40 UTC2h 19m
2026-07-24 ASA1418 LAX → GDL Jul 24, 17:45 UTCJul 24, 23:45 UTC6h 0m
2026-07-24 ASA492 SEA → ATL Jul 24, 00:45 UTCJul 24, 03:05 UTC2h 20m
2026-07-23 ASA384 SEA → BOS Jul 23, 21:35 UTCJul 23, 23:10 UTC1h 35m
2026-07-23 ASA383 BNA → SEA Jul 23, 18:35 UTCJul 23, 20:15 UTC1h 40m
2026-07-23 ASA519 FLL → SEA Jul 23, 12:10 UTCJul 23, 15:55 UTC3h 45m
2026-07-23 ASA519 FLL → SEA Jul 23, 12:23 UTCJul 23, 15:48 UTC3h 25m
2026-07-23 ASA520 SEA → FLL Jul 23, 06:45 UTCJul 23, 10:20 UTC3h 35m
2026-07-22 ASA326 SEA → BOS Jul 22, 23:15 UTCJul 23, 04:45 UTC5h 30m
2026-07-22 ASA262 JFK → SFO Jul 22, 16:40 UTCJul 22, 21:35 UTC4h 55m
2026-07-21 ASA226 SJC → GDL Jul 21, 23:00 UTCJul 22, 01:50 UTC2h 50m
2026-07-21 ASA775 PDX → ANC Jul 21, 17:45 UTCJul 21, 21:05 UTC3h 20m
2026-07-21 ASA668 DEN → PDX Jul 21, 14:10 UTCJul 21, 16:00 UTC1h 50m
2026-07-20 ASA333 SFO → SEA Jul 20, 22:45 UTCJul 21, 04:00 UTC5h 14m
2026-07-20 ASA487 PSP → PDX Jul 20, 18:40 UTCJul 20, 20:55 UTC2h 15m
2026-07-20 ASA451 IAD → SFO Jul 20, 12:50 UTCJul 20, 16:55 UTC4h 5m
2026-07-20 ASA490 SEA → MSY Jul 20, 07:00 UTCJul 20, 11:10 UTC4h 10m
2026-07-20 ASA339 SFO → JFK Jul 20, 00:30 UTCJul 20, 04:25 UTC3h 55m
2026-07-19 ASA604 SEA → AUS Jul 19, 19:25 UTCJul 19, 23:10 UTC3h 45m
2026-07-19 ASA645 PHX → SEA Jul 19, 14:35 UTCJul 19, 17:05 UTC2h 30m
2026-07-19 ASA644 SEA → PHX Jul 19, 04:35 UTCJul 19, 07:05 UTC2h 30m
2026-07-18 ASA503 LAX → SEA Jul 18, 21:45 UTCJul 19, 01:25 UTC3h 40m
2026-07-18 ASA422 SEA → SFO Jul 18, 16:35 UTCJul 18, 20:05 UTC3h 30m
2026-07-18 ASA665 PDX → ANC Jul 18, 02:05 UTCJul 18, 03:45 UTC1h 41m
2026-07-17 ASA368 - Jul 17, 22:35 UTCJul 18, 00:15 UTC1h 40m
2026-07-17 ASA338 BOS → SEA Jul 17, 15:31 UTCJul 17, 20:59 UTC5h 28m
2026-07-17 ASA338 BOS → SEA Jul 17, 15:35 UTCJul 17, 21:00 UTC5h 25m
2026-07-17 ASA536 SEA → BOS Jul 17, 09:10 UTCJul 17, 13:50 UTC4h 40m
2026-07-17 ASA591 - Jul 17, 06:05 UTCJul 17, 07:35 UTC1h 30m
2026-07-17 ASA591 SFO → SEA Jul 17, 05:57 UTCJul 17, 07:25 UTC1h 28m
2026-07-17 ASA504 PDX → SFO Jul 17, 01:59 UTCJul 17, 03:34 UTC1h 35m
2026-07-16 ASA1600 SMF → PDX Jul 16, 23:35 UTCJul 17, 00:35 UTC1h 0m
2026-07-16 ASA1428 SEA → SMF Jul 16, 20:55 UTCJul 16, 22:19 UTC1h 25m
2026-07-16 ASA317 DEN → SEA Jul 16, 15:00 UTCJul 16, 17:20 UTC2h 20m
2026-07-16 ASA317 DEN → SEA Jul 16, 14:56 UTCJul 16, 17:13 UTC2h 17m
2026-07-16 ASA1627 PDX → DEN Jul 16, 01:15 UTCJul 16, 03:30 UTC2h 15m
2026-07-15 ASA1302 OAK → PDX Jul 15, 22:40 UTCJul 15, 23:50 UTC1h 10m
2026-07-15 ASA655 SEA → SFO Jul 15, 19:10 UTCJul 15, 21:00 UTC1h 50m
2026-07-15 ASA1426 SJC → SEA Jul 15, 15:50 UTCJul 15, 17:25 UTC1h 35m
2026-07-15 ASA539 BFI → SJC Jul 15, 00:50 UTCJul 15, 02:50 UTC2h 0m
2026-07-14 ASA286 SEA → SEA Jul 14, 18:50 UTCJul 14, 22:45 UTC3h 54m
2026-07-14 ASA587 ORD → SEA Jul 14, 13:30 UTCJul 14, 17:15 UTC3h 45m

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 N215AK page for operator, model, and routing details .

Mode-S A1CC1F frequently asked

What is Mode-S code A1CC1F?
A1CC1F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N215AK.
Where is Mode-S A1CC1F registered?
Mode-S code A1CC1F 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 A1CC1F broadcasting right now?
Yes. Mode-S A1CC1F is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1CC1F, octal 50346037, decimal 10,603,551.
What flights does A1CC1F operate?
Mode-S A1CC1F has broadcast 20 distinct callsigns, including ASA508, ASA595, ASA706, ASA577, ASA576.