Apparatus

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sensors Mode-S transponder

A2C27E

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N277WN · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
A2C27E
Octal
50541176
Decimal
10,666,622
Country
US
Tail
N277WN
Type
B737
No current signal · last broadcast Jul 26, 21:30 UTC
Flights observed
767
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:30 UTC

Last known position

Most recent position reported by Mode-S A2C27E.

Country allocation

The ICAO 24-bit address A2C27E 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
SWA1989 Southwest Airlines 7 2026-05-07
SWA1793 Southwest Airlines 7 2026-05-29
SWA2901 Southwest Airlines 6 2026-07-23
SWA2256 - 6 2026-07-14
SWA2235 - 6 2026-07-08
SWA1102 Southwest Airlines 6 2026-05-25
SWA500 Southwest Airlines 5 2026-06-13
SWA4946 Southwest Airlines 5 2026-06-22
SWA3243 Southwest Airlines 5 2026-05-12
SWA2396 Southwest Airlines 5 2026-07-25
SWA1672 Southwest Airlines 5 2026-06-16
SWA1423 - 5 2026-07-07
SWA1198 Southwest Airlines 5 2026-04-15
SWA700 Southwest Airlines 4 2026-05-05
SWA4862 Southwest Airlines 4 2026-07-03
SWA4811 - 4 2026-07-13
SWA4466 Southwest Airlines 4 2026-06-12
SWA3931 Southwest Airlines 4 2026-06-07
SWA3863 - 4 2026-06-27
SWA2794 Southwest Airlines 4 2026-05-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA1645 STL → MDW Jul 26, 20:45 UTCJul 26, 21:30 UTC45m
2026-07-26 SWA1645 STL → MDW Jul 26, 18:25 UTCJul 26, 19:50 UTC1h 25m
2026-07-26 SWA1817 PHL → MDW Jul 26, 13:10 UTCJul 26, 17:15 UTC4h 5m
2026-07-26 SWA4447 LAS → OAK Jul 26, 02:10 UTCJul 26, 03:40 UTC1h 30m
2026-07-25 SWA588 BNA → TPA Jul 25, 23:15 UTCJul 26, 00:55 UTC1h 40m
2026-07-25 SWA554 PHX → AUS Jul 25, 21:45 UTCJul 25, 22:15 UTC30m
2026-07-25 SWA554 PHX → AUS Jul 25, 21:21 UTCJul 25, 22:17 UTC57m
2026-07-25 SWA554 PHX → AUS Jul 25, 17:55 UTCJul 25, 20:10 UTC2h 15m
2026-07-25 SWA3583 SJC → AUS Jul 25, 14:35 UTCJul 25, 16:55 UTC2h 20m
2026-07-25 SWA3583 SJC → AUS Jul 25, 14:32 UTCJul 25, 16:52 UTC2h 20m
2026-07-25 SWA1826 SAN → STL Jul 25, 12:21 UTCJul 25, 13:28 UTC1h 7m
2026-07-25 SWA2396 BWI → LAS Jul 25, 05:05 UTCJul 25, 13:35 UTC8h 30m
2026-07-25 SWA2396 BWI → LAS Jul 25, 03:05 UTCJul 25, 04:05 UTC1h 0m
2026-07-25 SWA2396 BWI → LAS Jul 25, 00:25 UTCJul 25, 02:10 UTC1h 45m
2026-07-24 SWA4982 SAT → SAN Jul 24, 21:20 UTCJul 24, 22:55 UTC1h 35m
2026-07-24 SWA3861 MDW → MCO Jul 24, 19:15 UTCJul 24, 20:10 UTC55m
2026-07-24 SWA3861 MDW → MCO Jul 24, 19:14 UTCJul 24, 20:05 UTC51m
2026-07-24 SWA1240 OAK → DEN Jul 24, 17:10 UTCJul 24, 17:30 UTC20m
2026-07-24 SWA1240 OAK → DEN Jul 24, 17:05 UTCJul 24, 18:11 UTC1h 6m
2026-07-24 SWA1240 OAK → DEN Jul 24, 14:05 UTCJul 24, 16:15 UTC2h 10m
2026-07-24 SWA2446 STL → SJC Jul 24, 11:30 UTCJul 24, 12:45 UTC1h 15m
2026-07-24 SWA336 BUR → SJC Jul 24, 00:55 UTCJul 24, 01:40 UTC45m
2026-07-23 SWA336 BUR → SJC Jul 23, 21:45 UTCJul 24, 00:00 UTC2h 15m
2026-07-23 SWA2901 RDU → TPA Jul 23, 18:15 UTCJul 23, 20:40 UTC2h 25m
2026-07-23 SWA2901 RDU → TPA Jul 23, 16:15 UTCJul 23, 16:55 UTC40m
2026-07-23 SWA2570 SLC → OAK Jul 23, 14:05 UTCJul 23, 14:45 UTC40m
2026-07-23 SWA2570 SLC → OAK Jul 23, 10:55 UTCJul 23, 13:00 UTC2h 5m
2026-07-22 SWA3956 OAK → SEA Jul 22, 22:45 UTCJul 23, 00:55 UTC2h 10m
2026-07-22 SWA3434 SJC → LAS Jul 22, 19:50 UTCJul 22, 20:35 UTC45m
2026-07-22 SWA3149 - Jul 22, 17:05 UTCJul 22, 18:50 UTC1h 45m
2026-07-22 SWA1828 - Jul 22, 13:50 UTCJul 22, 16:00 UTC2h 10m
2026-07-22 SWA3821 BWI → PWM Jul 22, 05:15 UTCJul 22, 05:25 UTC10m
2026-07-22 SWA3914 BWI → STL Jul 22, 02:25 UTCJul 22, 04:10 UTC1h 45m
2026-07-21 SWA3472 LAS → CMH Jul 21, 23:00 UTCJul 22, 01:15 UTC2h 15m
2026-07-21 SWA3224 MDW → SAN Jul 21, 19:10 UTCJul 21, 21:30 UTC2h 20m
2026-07-21 SWA3224 MDW → SAN Jul 21, 19:05 UTCJul 21, 21:26 UTC2h 21m
2026-07-21 SWA3224 MDW → SAN Jul 21, 16:25 UTCJul 21, 18:10 UTC1h 45m
2026-07-21 SWA4122 - Jul 21, 13:15 UTCJul 21, 15:00 UTC1h 45m
2026-07-21 SWA2284 SJC → BUR Jul 21, 10:30 UTCJul 21, 11:30 UTC1h 0m
2026-07-21 SWA2677 DEN → MSP Jul 21, 01:37 UTCJul 21, 03:05 UTC1h 28m
2026-07-21 SWA2677 DEN → MSP Jul 21, 01:40 UTCJul 21, 03:10 UTC1h 30m
2026-07-20 SWA2519 ALB → BWI Jul 20, 22:00 UTCJul 21, 00:05 UTC2h 4m
2026-07-20 SWA2310 PHX → PDX Jul 20, 18:50 UTCJul 20, 20:55 UTC2h 5m
2026-07-20 SWA2310 - Jul 20, 17:00 UTCJul 20, 17:45 UTC45m
2026-07-20 SWA2310 - Jul 20, 14:55 UTCJul 20, 15:50 UTC55m
2026-07-20 SWA2310 - Jul 20, 12:50 UTCJul 20, 13:45 UTC55m
2026-07-20 SWA1684 DEN → GEG Jul 20, 07:40 UTCJul 20, 08:05 UTC25m
2026-07-20 SWA4360 STL → PHX Jul 20, 04:10 UTCJul 20, 06:45 UTC2h 35m
2026-07-20 SWA241 SAN → PHX Jul 20, 00:55 UTCJul 20, 02:15 UTC1h 20m
2026-07-19 SWA1522 STL → DAL Jul 19, 21:40 UTCJul 19, 23:35 UTC1h 55m

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 N277WN page for operator, model, and routing details .

Mode-S A2C27E frequently asked

What is Mode-S code A2C27E?
A2C27E is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N277WN.
Where is Mode-S A2C27E registered?
Mode-S code A2C27E 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 A2C27E broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2C27E, octal 50541176, decimal 10,666,622.
What flights does A2C27E operate?
Mode-S A2C27E has broadcast 20 distinct callsigns, including SWA1989, SWA1793, SWA2901, SWA2256, SWA2235.