Apparatus

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sensors Mode-S transponder

AC2154

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8808Q · BOEING 737 MAX 8 · operated by SOUTHWEST AIRLINES CO

Hex
AC2154
Octal
53020524
Decimal
11,280,724
Country
US
Tail
N8808Q
Type
B38M
No current signal · last broadcast Jul 26, 22:00 UTC
Flights observed
716
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:00 UTC

Last known position

Most recent position reported by Mode-S AC2154.

Country allocation

The ICAO 24-bit address AC2154 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
SWA239 - 6 2026-07-16
SWA3782 Southwest Airlines 5 2026-07-06
SWA2104 - 5 2026-07-03
SWA4101 Southwest Airlines 4 2026-04-17
SWA3114 Southwest Airlines 4 2026-05-15
SWA2744 - 4 2026-06-14
SWA272 Southwest Airlines 4 2026-05-30
SWA2619 Southwest Airlines 4 2026-04-25
SWA2418 - 4 2026-07-12
SWA2190 - 4 2026-07-06
SWA2119 - 4 2026-07-20
SWA1890 - 4 2026-06-18
SWA1249 Southwest Airlines 4 2026-07-24
SWA960 Southwest Airlines 3 2026-07-20
SWA863 Southwest Airlines 3 2026-05-27
SWA805 Southwest Airlines 3 2026-05-16
SWA656 - 3 2026-07-01
SWA551 Southwest Airlines 3 2026-05-01
SWA4795 Southwest Airlines 3 2026-06-29
SWA4698 - 3 2026-07-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA2016 SJC → LAX Jul 26, 20:25 UTCJul 26, 21:55 UTC1h 30m
2026-07-26 SWA859 SLC → DEN Jul 26, 17:15 UTCJul 26, 19:05 UTC1h 50m
2026-07-26 SWA3433 OAK → SEA Jul 26, 14:15 UTCJul 26, 16:05 UTC1h 50m
2026-07-26 SWA2522 MCO → MHT Jul 26, 11:05 UTCJul 26, 12:30 UTC1h 25m
2026-07-26 SWA3473 LGA → ATL Jul 26, 01:55 UTCJul 26, 03:05 UTC1h 10m
2026-07-26 SWA3473 LGA → ATL Jul 26, 01:51 UTCJul 26, 03:04 UTC1h 13m
2026-07-25 SWA1893 MDW → BDL Jul 25, 22:20 UTCJul 26, 00:35 UTC2h 15m
2026-07-25 SWA3876 MCI → LGA Jul 25, 17:50 UTCJul 25, 21:00 UTC3h 10m
2026-07-25 SWA3289 BWI → SAT Jul 25, 15:15 UTCJul 25, 16:40 UTC1h 25m
2026-07-25 SWA1296 ATL → DEN Jul 25, 11:40 UTCJul 25, 13:15 UTC1h 35m
2026-07-25 SWA1296 ATL → DEN Jul 25, 11:39 UTCJul 25, 13:15 UTC1h 36m
2026-07-25 SWA4377 PHX → AUS Jul 25, 01:10 UTCJul 25, 03:40 UTC2h 30m
2026-07-24 SWA1157 BUR → SFO Jul 24, 22:45 UTCJul 25, 00:05 UTC1h 20m
2026-07-24 SWA1601 SAN → SJC Jul 24, 19:45 UTCJul 24, 21:40 UTC1h 55m
2026-07-24 SWA1249 ONT → SJC Jul 24, 15:55 UTCJul 24, 18:25 UTC2h 30m
2026-07-24 SWA1249 ONT → SJC Jul 24, 13:20 UTCJul 24, 15:00 UTC1h 40m
2026-07-24 SWA4663 DAL → MKE Jul 24, 10:55 UTCJul 24, 12:20 UTC1h 25m
2026-07-24 SWA2293 DEN → PDX Jul 24, 00:10 UTCJul 24, 03:20 UTC3h 10m
2026-07-23 SWA577 LGB → LAS Jul 23, 21:50 UTCJul 23, 23:00 UTC1h 10m
2026-07-23 SWA4986 LAS → MKE Jul 23, 19:40 UTCJul 23, 20:35 UTC55m
2026-07-23 SWA2092 SNA → OAK Jul 23, 17:55 UTCJul 23, 18:45 UTC50m
2026-07-23 SWA4685 MDW → BOI Jul 23, 15:40 UTCJul 23, 16:45 UTC1h 5m
2026-07-23 SWA1943 ATL → MSY Jul 23, 12:45 UTCJul 23, 14:25 UTC1h 40m
2026-07-23 SWA1943 ATL → MSY Jul 23, 12:43 UTCJul 23, 14:22 UTC1h 39m
2026-07-23 SWA4474 OAK → RNO Jul 23, 03:15 UTCJul 23, 04:45 UTC1h 30m
2026-07-23 SWA4474 OAK → RNO Jul 23, 03:10 UTCJul 23, 04:43 UTC1h 33m
2026-07-23 SWA3421 LGB → MDW Jul 23, 00:25 UTCJul 23, 01:40 UTC1h 15m
2026-07-22 SWA4820 BNA → TPA Jul 22, 21:55 UTCJul 22, 23:15 UTC1h 20m
2026-07-22 SWA4820 BNA → TPA Jul 22, 21:51 UTCJul 22, 23:07 UTC1h 16m
2026-07-22 SWA1250 LIT → STL Jul 22, 18:50 UTCJul 22, 20:15 UTC1h 25m
2026-07-22 SWA237 PDX → SJC Jul 22, 16:00 UTCJul 22, 17:10 UTC1h 10m
2026-07-22 SWA473 SEA → OAK Jul 22, 14:15 UTCJul 22, 15:00 UTC45m
2026-07-22 SWA473 SEA → OAK Jul 22, 14:14 UTCJul 22, 14:59 UTC45m
2026-07-22 SWA2093 MSY → DEN Jul 22, 12:25 UTCJul 22, 13:10 UTC45m
2026-07-22 SWA4794 IND → FLL Jul 22, 03:15 UTCJul 22, 03:55 UTC40m
2026-07-21 SWA3532 SJC → OGG Jul 21, 21:40 UTCJul 22, 01:10 UTC3h 30m
2026-07-21 SWA3532 SJC → OGG Jul 21, 21:36 UTCJul 22, 01:12 UTC3h 37m
2026-07-21 SWA1242 LAS → SJC Jul 21, 19:20 UTCJul 21, 20:30 UTC1h 10m
2026-07-21 SWA1561 BOS → BWI Jul 21, 16:30 UTCJul 21, 17:50 UTC1h 20m
2026-07-21 SWA3195 ONT → OAK Jul 21, 12:50 UTCJul 21, 14:55 UTC2h 5m
2026-07-21 SWA1671 DEN → PDX Jul 21, 04:10 UTCJul 21, 06:15 UTC2h 5m
2026-07-21 SWA3885 MCI → DCA Jul 21, 00:00 UTCJul 21, 02:10 UTC2h 10m
2026-07-20 SWA1627 MDW → BOS Jul 20, 20:55 UTCJul 20, 22:50 UTC1h 55m
2026-07-20 SWA2119 - Jul 20, 17:35 UTCJul 20, 19:45 UTC2h 10m
2026-07-20 SWA960 ISP → BNA Jul 20, 15:10 UTCJul 20, 16:25 UTC1h 15m
2026-07-20 SWA2985 SJC → BUR Jul 20, 11:00 UTCJul 20, 13:20 UTC2h 20m
2026-07-20 SWA2985 SJC → BUR Jul 20, 11:00 UTCJul 20, 13:14 UTC2h 15m
2026-07-20 SWA1065 MDW → MHT Jul 20, 02:20 UTCJul 20, 03:25 UTC1h 5m
2026-07-19 SWA1269 - Jul 19, 23:10 UTCJul 20, 01:15 UTC2h 5m
2026-07-19 SWA1269 CHS → DAL Jul 19, 23:07 UTCJul 20, 01:13 UTC2h 6m

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 N8808Q page for operator, model, and routing details .

Mode-S AC2154 frequently asked

What is Mode-S code AC2154?
AC2154 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8808Q.
Where is Mode-S AC2154 registered?
Mode-S code AC2154 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 AC2154 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 AC2154, octal 53020524, decimal 11,280,724.
What flights does AC2154 operate?
Mode-S AC2154 has broadcast 20 distinct callsigns, including SWA239, SWA3782, SWA2104, SWA4101, SWA3114.