Apparatus

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sensors Mode-S transponder

AB1FB0

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N816AK · BOEING 737 MAX 8 · operated by ALASKA AIRLINES

Hex
AB1FB0
Octal
52617660
Decimal
11,214,768
Country
US
Tail
N816AK
Type
B38M
No current signal · last broadcast Jul 26, 22:00 UTC
Flights observed
421
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:00 UTC

Last known position

Most recent position reported by Mode-S AB1FB0.

Country allocation

The ICAO 24-bit address AB1FB0 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
ASA400 Alaska Airlines 11 2026-06-04
ASA258 - 9 2026-07-09
ASA1453 Alaska Airlines 8 2026-06-05
ASA1452 Alaska Airlines 8 2026-06-03
ASA788 - 7 2026-07-10
ASA234 - 7 2026-07-11
ASA213 Alaska Airlines 7 2026-06-18
ASA1304 Alaska Airlines 7 2026-06-04
ASA789 Alaska Airlines 6 2026-07-10
ASA339 Alaska Airlines 6 2026-06-05
ASA761 Alaska Airlines 5 2026-06-05
ASA750 - 5 2026-07-16
ASA520 Alaska Airlines 5 2026-06-04
ASA237 - 5 2026-06-18
ASA220 - 5 2026-07-11
ASA1535 - 5 2026-06-21
ASA1415 Alaska Airlines 5 2026-06-03
ASA712 Alaska Airlines 4 2026-05-17
ASA495 Alaska Airlines 4 2026-06-04
ASA452 Alaska Airlines 4 2026-05-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASA293 EWR → SFO Jul 26, 21:20 UTCJul 26, 22:00 UTC40m
2026-07-26 ASA449 TPA → SFO Jul 26, 19:30 UTCJul 26, 20:10 UTC40m
2026-07-26 ASA1325 SNA → SEA Jul 26, 15:05 UTCJul 26, 17:25 UTC2h 20m
2026-07-26 ASA518 SEA → SLC Jul 26, 03:05 UTCJul 26, 05:15 UTC2h 10m
2026-07-25 ASA1369 PVR → SFO Jul 25, 20:25 UTCJul 26, 01:40 UTC5h 15m
2026-07-25 ASA374 SJD → SJC Jul 25, 14:40 UTCJul 25, 18:50 UTC4h 10m
2026-07-25 ASA1520 LAX → SFO Jul 25, 08:55 UTCJul 25, 12:20 UTC3h 25m
2026-07-25 ASA1880 SFO → PHX Jul 25, 04:00 UTCJul 25, 07:10 UTC3h 10m
2026-07-25 ASA1880 SFO → PHX Jul 25, 03:58 UTCJul 25, 07:08 UTC3h 10m
2026-07-24 ASA218 SFO → PDX Jul 24, 21:10 UTCJul 25, 02:10 UTC5h 0m
2026-07-24 ASA784 PDX → ATL Jul 24, 14:50 UTCJul 24, 19:50 UTC5h 0m
2026-07-23 ASA646 PDX → PHX Jul 23, 22:55 UTCJul 24, 02:25 UTC3h 30m
2026-07-23 ASA392 PDX → DFW Jul 23, 18:10 UTCJul 23, 21:25 UTC3h 15m
2026-07-23 ASA1629 LAS → PDX Jul 23, 14:10 UTCJul 23, 15:55 UTC1h 45m
2026-07-23 ASA605 SFO → LAS Jul 23, 01:30 UTCJul 23, 03:50 UTC2h 20m
2026-07-22 ASA674 SEA → YYZ Jul 22, 21:55 UTCJul 23, 00:25 UTC2h 30m
2026-07-22 ASA716 SFO → SAN Jul 22, 18:10 UTCJul 22, 20:30 UTC2h 20m
2026-07-22 ASA1629 LAS → PDX Jul 22, 14:25 UTCJul 22, 16:10 UTC1h 45m
2026-07-22 ASA704 OGG → SFO Jul 22, 03:50 UTCJul 22, 05:25 UTC1h 35m
2026-07-22 ASA704 OGG → SFO Jul 22, 03:50 UTCJul 22, 05:50 UTC2h 0m
2026-07-22 ASA296 LAX → SEA Jul 22, 00:20 UTCJul 22, 01:25 UTC1h 5m
2026-07-21 ASA342 SEA → ORD Jul 21, 22:10 UTCJul 21, 23:05 UTC55m
2026-07-21 ASA1355 SFO → SEA Jul 21, 18:40 UTCJul 21, 20:30 UTC1h 50m
2026-07-21 ASA1355 SFO → SEA Jul 21, 18:50 UTCJul 21, 20:28 UTC1h 38m
2026-07-21 ASA1611 GEG → LAX Jul 21, 13:30 UTCJul 21, 15:50 UTC2h 20m
2026-07-21 ASA1356 SFO → LTO Jul 21, 05:20 UTCJul 21, 06:00 UTC40m
2026-07-21 ASA1356 SFO → LTO Jul 21, 05:15 UTCJul 21, 05:54 UTC39m
2026-07-20 ASA646 PDX → PHX Jul 20, 22:55 UTCJul 21, 02:10 UTC3h 14m
2026-07-20 ASA646 PDX → PHX Jul 20, 22:54 UTCJul 21, 02:08 UTC3h 14m
2026-07-20 ASA392 PDX → DFW Jul 20, 18:00 UTCJul 20, 21:25 UTC3h 25m
2026-07-20 ASA679 SJC → PDX Jul 20, 15:05 UTCJul 20, 16:30 UTC1h 25m
2026-07-20 ASA523 SEA → SJC Jul 20, 05:25 UTCJul 20, 07:20 UTC1h 55m
2026-07-20 ASA296 LAX → SEA Jul 20, 00:35 UTCJul 20, 01:35 UTC1h 0m
2026-07-20 ASA296 LAX → SEA Jul 20, 00:32 UTCJul 20, 01:26 UTC54m
2026-07-19 ASA342 - Jul 19, 22:15 UTCJul 19, 23:05 UTC50m
2026-07-19 ASA1467 LAS → PDX Jul 19, 18:20 UTCJul 19, 20:05 UTC1h 45m
2026-07-19 ASA627 PDX → LAS Jul 19, 15:20 UTCJul 19, 16:47 UTC1h 27m
2026-07-19 ASA627 PDX → LAS Jul 19, 15:05 UTCJul 19, 16:55 UTC1h 50m
2026-07-19 ASA1520 FAI → PDX Jul 19, 09:05 UTCJul 19, 12:30 UTC3h 25m
2026-07-19 ASA1880 SFO → PHX Jul 19, 04:10 UTCJul 19, 07:35 UTC3h 25m
2026-07-18 ASA1381 - Jul 18, 22:35 UTCJul 19, 00:45 UTC2h 10m
2026-07-18 ASA1381 SAN → SEA Jul 18, 22:34 UTCJul 19, 00:35 UTC2h 1m
2026-07-18 ASA1346 SEA → SAN Jul 18, 18:40 UTCJul 18, 21:05 UTC2h 25m
2026-07-17 ASA3 DCA → SEA Jul 17, 21:44 UTCJul 18, 02:50 UTC5h 6m
2026-07-17 ASA10 PDX → DCA Jul 17, 15:10 UTCJul 17, 19:49 UTC4h 40m
2026-07-17 ASA10 PDX → DCA Jul 17, 15:06 UTCJul 17, 19:35 UTC4h 29m
2026-07-17 ASA1396 AUS → PDX Jul 17, 00:50 UTCJul 17, 04:25 UTC3h 35m
2026-07-16 ASA540 SFO → AUS Jul 16, 17:40 UTCJul 16, 21:40 UTC4h 0m
2026-07-16 ASA750 - Jul 16, 14:20 UTCJul 16, 16:15 UTC1h 55m
2026-07-16 ASA518 PDX → SNA Jul 16, 03:10 UTCJul 16, 05:25 UTC2h 15m

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 N816AK page for operator, model, and routing details .

Mode-S AB1FB0 frequently asked

What is Mode-S code AB1FB0?
AB1FB0 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N816AK.
Where is Mode-S AB1FB0 registered?
Mode-S code AB1FB0 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 AB1FB0 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB1FB0, octal 52617660, decimal 11,214,768.
What flights does AB1FB0 operate?
Mode-S AB1FB0 has broadcast 20 distinct callsigns, including ASA400, ASA258, ASA1453, ASA1452, ASA788.