Apparatus

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sensors Mode-S transponder

AC27A6

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8820L · BOEING 737 MAX 8 · operated by SOUTHWEST AIRLINES CO

Hex
AC27A6
Octal
53023646
Decimal
11,282,342
Country
US
Tail
N8820L
Type
B38M
No current signal · last broadcast Jul 26, 20:55 UTC
Flights observed
759
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:55 UTC

Last known position

Most recent position reported by Mode-S AC27A6.

Country allocation

The ICAO 24-bit address AC27A6 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
SWA255 Southwest Airlines 5 2026-07-18
SWA4940 Southwest Airlines 4 2026-06-09
SWA4413 Southwest Airlines 4 2026-06-11
SWA3521 Southwest Airlines 4 2026-06-01
SWA202 Southwest Airlines 4 2026-04-16
SWA1918 Southwest Airlines 4 2026-04-26
SWA1583 - 4 2026-06-29
SWA1477 - 4 2026-06-28
SWA1266 Southwest Airlines 4 2026-05-13
SWA1199 Southwest Airlines 4 2026-04-13
SWA1171 - 4 2026-07-07
SWA974 - 3 2026-07-23
SWA961 Southwest Airlines 3 2026-06-13
SWA822 Southwest Airlines 3 2026-04-28
SWA768 Southwest Airlines 3 2026-07-20
SWA737 - 3 2026-07-16
SWA4466 - 3 2026-06-20
SWA440 - 3 2026-07-16
SWA4214 - 3 2026-04-13
SWA4205 Southwest Airlines 3 2026-05-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA4795 PHX → RDU Jul 26, 19:45 UTCJul 26, 20:55 UTC1h 10m
2026-07-26 SWA1543 ONT → OAK Jul 26, 16:40 UTCJul 26, 18:40 UTC2h 0m
2026-07-26 SWA3615 BNA → TPA Jul 26, 12:40 UTCJul 26, 14:50 UTC2h 10m
2026-07-26 SWA3615 BNA → TPA Jul 26, 12:40 UTCJul 26, 14:46 UTC2h 6m
2026-07-26 SWA286 SLC → OAK Jul 26, 05:10 UTCJul 26, 07:30 UTC2h 21m
2026-07-26 SWA642 TPA → AUS Jul 26, 01:00 UTCJul 26, 04:05 UTC3h 5m
2026-07-26 SWA642 TPA → AUS Jul 26, 00:55 UTCJul 26, 03:58 UTC3h 4m
2026-07-25 SWA879 CLT → MDW Jul 25, 22:20 UTCJul 25, 23:45 UTC1h 25m
2026-07-25 SWA879 CLT → MDW Jul 25, 22:19 UTCJul 25, 23:40 UTC1h 21m
2026-07-25 SWA907 MBJ → BWI Jul 25, 14:25 UTCJul 25, 20:30 UTC6h 5m
2026-07-25 SWA4483 SJC → BUR Jul 25, 10:10 UTCJul 25, 12:10 UTC2h 0m
2026-07-25 SWA4483 SJC → BUR Jul 25, 10:09 UTCJul 25, 12:07 UTC1h 58m
2026-07-25 SWA4617 BWI → DEN Jul 25, 03:05 UTCJul 25, 04:40 UTC1h 35m
2026-07-25 SWA4159 SJC → LAS Jul 25, 00:30 UTCJul 25, 01:40 UTC1h 10m
2026-07-25 SWA4159 SJC → LAS Jul 25, 00:25 UTCJul 25, 01:31 UTC1h 6m
2026-07-24 SWA4159 SJC → LAS Jul 24, 22:10 UTCJul 24, 23:20 UTC1h 10m
2026-07-24 SWA4434 SNA → DEN Jul 24, 18:10 UTCJul 24, 21:00 UTC2h 50m
2026-07-24 SWA3145 ISP → BNA Jul 24, 15:15 UTCJul 24, 17:00 UTC1h 45m
2026-07-24 SWA3145 ISP → BNA Jul 24, 15:12 UTCJul 24, 16:56 UTC1h 44m
2026-07-24 SWA4911 MDW → LAS Jul 24, 13:10 UTCJul 24, 14:10 UTC1h 0m
2026-07-24 SWA208 MDW → CVG Jul 24, 04:00 UTCJul 24, 05:00 UTC1h 0m
2026-07-24 SWA208 MDW → CVG Jul 24, 02:40 UTCJul 24, 03:10 UTC30m
2026-07-24 SWA2187 ATL → DEN Jul 24, 00:40 UTCJul 24, 01:20 UTC40m
2026-07-23 SWA3832 SJC → LAX Jul 23, 22:05 UTCJul 23, 23:15 UTC1h 10m
2026-07-23 SWA3832 SJC → LAX Jul 23, 22:03 UTCJul 23, 23:11 UTC1h 8m
2026-07-23 SWA4533 MSY → LAX Jul 23, 20:05 UTCJul 23, 21:10 UTC1h 5m
2026-07-23 SWA974 - Jul 23, 14:00 UTCJul 23, 18:25 UTC4h 25m
2026-07-23 SWA974 BWI → LAS Jul 23, 13:55 UTCJul 23, 18:45 UTC4h 50m
2026-07-23 SWA974 - Jul 23, 10:25 UTCJul 23, 12:40 UTC2h 15m
2026-07-23 SWA197 MDW → DEN Jul 23, 01:25 UTCJul 23, 03:40 UTC2h 15m
2026-07-23 SWA197 MDW → DEN Jul 23, 01:20 UTCJul 23, 03:35 UTC2h 15m
2026-07-22 SWA2785 PDX → DEN Jul 22, 21:40 UTCJul 23, 00:00 UTC2h 20m
2026-07-22 SWA4516 - Jul 22, 18:40 UTCJul 22, 20:20 UTC1h 40m
2026-07-22 SWA4442 LIH → LAX Jul 22, 16:40 UTCJul 22, 17:30 UTC50m
2026-07-22 SWA4009 DCA → MDW Jul 22, 12:45 UTCJul 22, 14:35 UTC1h 50m
2026-07-22 SWA4009 DCA → MDW Jul 22, 12:42 UTCJul 22, 14:35 UTC1h 54m
2026-07-22 SWA4929 BWI → LAX Jul 22, 11:30 UTCJul 22, 11:40 UTC10m
2026-07-22 SWA2227 DCA → AUS Jul 22, 01:30 UTCJul 22, 05:10 UTC3h 40m
2026-07-21 SWA2795 OAK → BLI Jul 21, 20:40 UTCJul 22, 00:00 UTC3h 20m
2026-07-21 SWA4664 MKE → MCO Jul 21, 17:10 UTCJul 21, 19:05 UTC1h 55m
2026-07-21 SWA2558 - Jul 21, 14:15 UTCJul 21, 15:55 UTC1h 40m
2026-07-21 SWA2558 MDW → MSY Jul 21, 14:10 UTCJul 21, 15:46 UTC1h 36m
2026-07-21 SWA356 AUS → MDW Jul 21, 10:50 UTCJul 21, 13:00 UTC2h 10m
2026-07-21 SWA3417 RDU → AUS Jul 21, 00:20 UTCJul 21, 02:50 UTC2h 30m
2026-07-21 SWA3417 RDU → AUS Jul 21, 00:15 UTCJul 21, 02:44 UTC2h 29m
2026-07-20 SWA4411 - Jul 20, 20:45 UTCJul 20, 23:15 UTC2h 30m
2026-07-20 SWA709 - Jul 20, 17:25 UTCJul 20, 19:25 UTC2h 0m
2026-07-20 SWA709 MDW → HOU Jul 20, 17:23 UTCJul 20, 19:28 UTC2h 6m
2026-07-20 SWA2744 OAK → MDW Jul 20, 12:25 UTCJul 20, 16:05 UTC3h 40m
2026-07-20 SWA4042 OMA → PHX Jul 20, 04:10 UTCJul 20, 07:55 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 N8820L page for operator, model, and routing details .

Mode-S AC27A6 frequently asked

What is Mode-S code AC27A6?
AC27A6 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8820L.
Where is Mode-S AC27A6 registered?
Mode-S code AC27A6 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 AC27A6 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC27A6, octal 53023646, decimal 11,282,342.
What flights does AC27A6 operate?
Mode-S AC27A6 has broadcast 20 distinct callsigns, including SWA255, SWA4940, SWA4413, SWA3521, SWA202.