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sensors Mode-S transponder

AAA5FF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N7854B · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
AAA5FF
Octal
52522777
Decimal
11,183,615
Country
US
Tail
N7854B
Type
B737
No current signal · last broadcast Jul 26, 21:45 UTC
Flights observed
779
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:45 UTC

Last known position

Most recent position reported by Mode-S AAA5FF.

Country allocation

The ICAO 24-bit address AAA5FF 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
SWA4461 Southwest Airlines 6 2026-06-30
SWA2451 - 5 2026-06-18
SWA2450 - 5 2026-04-13
SWA1437 - 5 2026-07-19
SWA937 - 4 2026-07-08
SWA684 - 4 2026-07-01
SWA617 Southwest Airlines 4 2026-06-11
SWA600 Southwest Airlines 4 2026-05-08
SWA599 Southwest Airlines 4 2026-05-08
SWA3821 - 4 2026-07-15
SWA3593 Southwest Airlines 4 2026-05-20
SWA3588 Southwest Airlines 4 2026-05-20
SWA3495 Southwest Airlines 4 2026-06-29
SWA3472 Southwest Airlines 4 2026-04-30
SWA3287 - 4 2026-04-14
SWA3151 - 4 2026-07-06
SWA2990 Southwest Airlines 4 2026-04-28
SWA2794 - 4 2026-04-15
SWA2577 Southwest Airlines 4 2026-05-17
SWA1564 Southwest Airlines 4 2026-06-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA116 MCO → MDW Jul 26, 21:10 UTCJul 26, 21:45 UTC35m
2026-07-26 SWA116 MCO → MDW Jul 26, 18:20 UTCJul 26, 20:05 UTC1h 45m
2026-07-26 SWA2824 MCO → MSY Jul 26, 15:45 UTCJul 26, 16:50 UTC1h 5m
2026-07-26 SWA2824 MCO → MSY Jul 26, 15:45 UTCJul 26, 16:49 UTC1h 4m
2026-07-26 SWA4217 BOS → STL Jul 26, 12:05 UTCJul 26, 13:40 UTC1h 35m
2026-07-26 SWA4428 OKC → DEN Jul 26, 09:45 UTCJul 26, 10:40 UTC55m
2026-07-26 SWA4428 OKC → DEN Jul 26, 09:42 UTCJul 26, 10:36 UTC54m
2026-07-26 SWA178 ALB → MCO Jul 26, 00:13 UTCJul 26, 02:30 UTC2h 17m
2026-07-26 SWA178 ALB → MCO Jul 26, 00:15 UTCJul 26, 02:30 UTC2h 15m
2026-07-25 SWA3415 BWI → BDL Jul 25, 21:05 UTCJul 25, 22:35 UTC1h 30m
2026-07-25 SWA3415 BWI → BDL Jul 25, 18:25 UTCJul 25, 20:00 UTC1h 35m
2026-07-25 SWA3415 BWI → BDL Jul 25, 15:50 UTCJul 25, 17:20 UTC1h 30m
2026-07-25 SWA441 HOU → DEN Jul 25, 14:00 UTCJul 25, 14:50 UTC50m
2026-07-25 SWA441 HOU → DEN Jul 25, 13:55 UTCJul 25, 14:52 UTC57m
2026-07-25 SWA1053 BWI → MCI Jul 25, 11:55 UTCJul 25, 12:55 UTC1h 0m
2026-07-25 SWA2521 OAK → BLI Jul 25, 02:45 UTCJul 25, 05:45 UTC3h 0m
2026-07-25 SWA2521 OAK → BLI Jul 25, 01:00 UTCJul 25, 01:55 UTC55m
2026-07-24 SWA3701 CMH → MDW Jul 24, 22:36 UTCJul 24, 23:42 UTC1h 6m
2026-07-24 SWA3701 CMH → MDW Jul 24, 22:40 UTCJul 24, 23:45 UTC1h 5m
2026-07-24 SWA2433 BOS → DEN Jul 24, 20:20 UTCJul 24, 21:05 UTC45m
2026-07-24 SWA2433 BOS → DEN Jul 24, 15:20 UTCJul 24, 19:05 UTC3h 45m
2026-07-24 SWA4202 SNA → OAK Jul 24, 12:35 UTCJul 24, 14:15 UTC1h 40m
2026-07-24 SWA4263 STL → BOS Jul 24, 00:10 UTCJul 24, 01:30 UTC1h 20m
2026-07-23 SWA961 MIA → MDW Jul 23, 22:35 UTCJul 23, 23:10 UTC35m
2026-07-23 SWA961 MIA → MDW Jul 23, 22:30 UTCJul 23, 23:08 UTC38m
2026-07-23 SWA961 MIA → MDW Jul 23, 20:00 UTCJul 23, 21:20 UTC1h 20m
2026-07-23 SWA477 BNA → RSW Jul 23, 18:05 UTCJul 23, 19:00 UTC55m
2026-07-23 SWA477 BNA → RSW Jul 23, 15:45 UTCJul 23, 16:45 UTC1h 0m
2026-07-23 SWA2531 PHX → OAK Jul 23, 12:50 UTCJul 23, 14:00 UTC1h 10m
2026-07-23 SWA4758 MDW → BNA Jul 23, 03:20 UTCJul 23, 04:25 UTC1h 5m
2026-07-22 SWA2456 SAN → SJC Jul 22, 21:50 UTCJul 23, 02:05 UTC4h 15m
2026-07-22 SWA2456 SAN → SJC Jul 22, 21:46 UTCJul 23, 02:00 UTC4h 14m
2026-07-22 SWA2803 - Jul 22, 18:40 UTCJul 22, 20:10 UTC1h 30m
2026-07-22 SWA3513 - Jul 22, 14:05 UTCJul 22, 17:30 UTC3h 25m
2026-07-22 SWA2072 ORD → DEN Jul 22, 00:25 UTCJul 22, 03:10 UTC2h 45m
2026-07-21 SWA1298 - Jul 21, 16:55 UTCJul 21, 22:05 UTC5h 10m
2026-07-20 SWA4085 LAS → OAK Jul 20, 22:10 UTCJul 20, 22:35 UTC25m
2026-07-20 SWA4870 TPA → MDW Jul 20, 20:45 UTCJul 20, 21:10 UTC25m
2026-07-20 SWA403 SLC → PHX Jul 20, 18:40 UTCJul 20, 19:50 UTC1h 10m
2026-07-20 SWA403 AUS → SLC Jul 20, 15:25 UTCJul 20, 17:40 UTC2h 15m
2026-07-20 SWA1435 OGG → SJC Jul 20, 12:05 UTCJul 20, 14:20 UTC2h 15m
2026-07-20 SWA385 MHT → MDW Jul 20, 10:25 UTCJul 20, 10:55 UTC30m
2026-07-20 SWA385 MHT → MDW Jul 20, 10:25 UTCJul 20, 10:50 UTC25m
2026-07-20 SWA2710 MCO → SRQ Jul 20, 03:55 UTCJul 20, 04:20 UTC25m
2026-07-20 SWA2710 MCO → SRQ Jul 20, 03:55 UTCJul 20, 04:12 UTC17m
2026-07-20 SWA787 CMH → BWI Jul 20, 01:35 UTCJul 20, 03:05 UTC1h 30m
2026-07-19 SWA1437 BUR → SFO Jul 19, 22:25 UTCJul 19, 23:35 UTC1h 10m
2026-07-19 SWA1437 BUR → SFO Jul 19, 20:15 UTCJul 19, 21:10 UTC55m
2026-07-19 SWA1437 BUR → SFO Jul 19, 15:55 UTCJul 19, 18:55 UTC3h 0m
2026-07-19 SWA1437 DAL → AUS Jul 19, 14:20 UTCJul 19, 14:50 UTC30m

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 N7854B page for operator, model, and routing details .

Mode-S AAA5FF frequently asked

What is Mode-S code AAA5FF?
AAA5FF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N7854B.
Where is Mode-S AAA5FF registered?
Mode-S code AAA5FF 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 AAA5FF broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AAA5FF, octal 52522777, decimal 11,183,615.
What flights does AAA5FF operate?
Mode-S AAA5FF has broadcast 20 distinct callsigns, including SWA4461, SWA2451, SWA2450, SWA1437, SWA937.