Apparatus

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sensors Mode-S transponder

A146CE

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N1810U · operated by SOUTHWEST AIRLINES CO

Hex
A146CE
Octal
50243316
Decimal
10,569,422
Country
US
Tail
N1810U
Type
B38M
No current signal · last broadcast Jul 26, 20:25 UTC
Flights observed
601
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:25 UTC

Last known position

Most recent position reported by Mode-S A146CE.

Country allocation

The ICAO 24-bit address A146CE 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
SWA489 - 4 2026-06-18
SWA377 - 4 2026-07-11
SWA2336 - 4 2026-06-18
SWA1613 - 4 2026-07-05
SWA1249 - 4 2026-07-17
SWA8503 Southwest Airlines 3 2026-06-10
SWA817 - 3 2026-07-14
SWA748 - 3 2026-06-26
SWA691 - 3 2026-07-14
SWA4574 - 3 2026-04-13
SWA456 - 3 2026-07-01
SWA4452 - 3 2026-07-06
SWA4151 Southwest Airlines 3 2026-07-25
SWA4074 Southwest Airlines 3 2026-05-12
SWA3874 Southwest Airlines 3 2026-06-15
SWA387 - 3 2026-06-25
SWA3104 - 3 2026-06-22
SWA3081 Southwest Airlines 3 2026-06-12
SWA2848 Southwest Airlines 3 2026-05-10
SWA2603 Southwest Airlines 3 2026-04-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA1017 MCO → HOU Jul 26, 19:35 UTCJul 26, 20:25 UTC50m
2026-07-26 SWA2204 PHX → ORD Jul 26, 13:50 UTCJul 26, 18:00 UTC4h 10m
2026-07-26 SWA2171 DEN → SMF Jul 26, 10:30 UTCJul 26, 11:30 UTC1h 0m
2026-07-26 SWA2171 DEN → SMF Jul 26, 06:25 UTCJul 26, 06:35 UTC11m
2026-07-26 SWA3099 STL → BOS Jul 26, 00:35 UTCJul 26, 00:50 UTC15m
2026-07-26 SWA3099 STL → BOS Jul 26, 00:28 UTCJul 26, 00:48 UTC20m
2026-07-25 SWA373 SNA → SJC Jul 25, 23:10 UTCJul 25, 23:20 UTC10m
2026-07-25 SWA373 SNA → SJC Jul 25, 18:10 UTCJul 25, 18:45 UTC35m
2026-07-25 SWA2251 HOU → OAK Jul 25, 16:05 UTCJul 25, 16:50 UTC45m
2026-07-25 SWA4750 DEN → OAK Jul 25, 13:50 UTCJul 25, 14:45 UTC55m
2026-07-25 SWA1696 BWI → BOS Jul 25, 04:55 UTCJul 25, 06:40 UTC1h 45m
2026-07-25 SWA4151 MCO → BWI Jul 25, 01:35 UTCJul 25, 03:30 UTC1h 55m
2026-07-25 SWA4151 MCO → BWI Jul 25, 01:32 UTCJul 25, 03:30 UTC1h 58m
2026-07-24 SWA4151 MCO → BWI Jul 24, 18:30 UTCJul 24, 23:30 UTC5h 0m
2026-07-24 SWA2166 PVD → BWI Jul 24, 16:10 UTCJul 24, 16:40 UTC30m
2026-07-24 SWA495 HOU → MAF Jul 24, 06:50 UTCJul 24, 07:20 UTC30m
2026-07-24 SWA2349 SAN → AUS Jul 24, 03:35 UTCJul 24, 03:45 UTC10m
2026-07-24 SWA3096 SMF → ONT Jul 24, 01:55 UTCJul 24, 02:10 UTC15m
2026-07-24 SWA2172 ABQ → PHX Jul 24, 00:05 UTCJul 24, 00:25 UTC20m
2026-07-23 SWA3783 IND → TPA Jul 23, 22:15 UTCJul 23, 22:20 UTC5m
2026-07-23 SWA3783 IND → TPA Jul 23, 17:05 UTCJul 23, 17:55 UTC50m
2026-07-23 SWA2359 BLI → OAK Jul 23, 14:35 UTCJul 23, 15:40 UTC1h 5m
2026-07-23 SWA1915 BUR → DAL Jul 23, 11:05 UTCJul 23, 12:05 UTC1h 0m
2026-07-23 SWA1915 BUR → DAL Jul 23, 07:05 UTCJul 23, 07:25 UTC20m
2026-07-22 SWA3274 - Jul 22, 16:45 UTCJul 22, 18:00 UTC1h 15m
2026-07-22 SWA3274 PHX → HNL Jul 22, 16:45 UTCJul 22, 23:05 UTC6h 20m
2026-07-22 SWA3567 MDW → CVG Jul 22, 02:55 UTCJul 22, 03:30 UTC35m
2026-07-22 SWA3567 MDW → CVG Jul 22, 00:10 UTCJul 22, 01:10 UTC1h 0m
2026-07-21 SWA3262 - Jul 21, 20:15 UTCJul 21, 22:40 UTC2h 25m
2026-07-21 SWA2866 DEN → BUR Jul 21, 18:00 UTCJul 21, 18:55 UTC55m
2026-07-21 SWA2866 DEN → BUR Jul 21, 17:56 UTCJul 21, 18:50 UTC54m
2026-07-21 SWA3583 SJC → AUS Jul 21, 14:30 UTCJul 21, 16:50 UTC2h 20m
2026-07-21 SWA485 BOI → OAK Jul 21, 12:45 UTCJul 21, 13:25 UTC40m
2026-07-21 SWA485 BOI → OAK Jul 21, 10:10 UTCJul 21, 11:35 UTC1h 25m
2026-07-21 SWA4091 - Jul 21, 03:10 UTCJul 21, 04:05 UTC55m
2026-07-20 SWA217 CUN → MDW Jul 20, 22:15 UTCJul 21, 01:35 UTC3h 19m
2026-07-20 SWA386 BNA → CUN Jul 20, 17:35 UTCJul 20, 20:10 UTC2h 35m
2026-07-20 SWA2997 ONT → OAK Jul 20, 14:50 UTCJul 20, 16:00 UTC1h 10m
2026-07-20 SWA2997 ONT → OAK Jul 20, 12:35 UTCJul 20, 13:30 UTC55m
2026-07-20 SWA420 - Jul 20, 10:10 UTCJul 20, 11:10 UTC1h 0m
2026-07-20 SWA420 BDL → BWI Jul 20, 10:08 UTCJul 20, 11:12 UTC1h 4m
2026-07-20 SWA1451 SAN → SFO Jul 20, 01:25 UTCJul 20, 02:55 UTC1h 30m
2026-07-19 SWA1226 SJC → ONT Jul 19, 21:30 UTCJul 20, 00:25 UTC2h 55m
2026-07-19 SWA2192 STL → DEN Jul 19, 19:05 UTCJul 19, 20:25 UTC1h 20m
2026-07-19 SWA2192 STL → DEN Jul 19, 15:25 UTCJul 19, 16:45 UTC1h 20m
2026-07-19 SWA4156 BOS → DEN Jul 19, 10:24 UTCJul 19, 14:16 UTC3h 52m
2026-07-19 SWA4156 BOS → DEN Jul 19, 10:25 UTCJul 19, 14:20 UTC3h 55m
2026-07-19 SWA892 - Jul 19, 04:20 UTCJul 19, 05:25 UTC1h 5m
2026-07-18 SWA2830 - Jul 18, 20:30 UTCJul 19, 01:40 UTC5h 10m
2026-07-18 SWA2830 LAX → BWI Jul 18, 20:26 UTCJul 19, 01:38 UTC5h 12m

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 N1810U page for operator, model, and routing details .

Mode-S A146CE frequently asked

What is Mode-S code A146CE?
A146CE is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N1810U.
Where is Mode-S A146CE registered?
Mode-S code A146CE 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 A146CE broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A146CE, octal 50243316, decimal 10,569,422.
What flights does A146CE operate?
Mode-S A146CE has broadcast 20 distinct callsigns, including SWA489, SWA377, SWA2336, SWA1613, SWA1249.