Apparatus

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sensors Mode-S transponder

AAAA4A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N7868K · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
AAAA4A
Octal
52525112
Decimal
11,184,714
Country
US
Tail
N7868K
Type
B737
No current signal · last broadcast Jul 26, 22:30 UTC
Flights observed
768
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:30 UTC

Last known position

Most recent position reported by Mode-S AAAA4A.

Country allocation

The ICAO 24-bit address AAAA4A 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
SWA1761 Southwest Airlines 8 2026-06-16
SWA3118 Southwest Airlines 7 2026-05-10
SWA598 - 6 2026-06-17
SWA2986 Southwest Airlines 6 2026-06-15
SWA188 Southwest Airlines 6 2026-04-16
SWA1402 - 6 2026-07-15
SWA66 Southwest Airlines 5 2026-06-27
SWA356 - 5 2026-06-22
SWA30 Southwest Airlines 5 2026-05-04
SWA2676 Southwest Airlines 5 2026-04-30
SWA1149 Southwest Airlines 5 2026-05-21
SWA938 Southwest Airlines 4 2026-06-06
SWA781 Southwest Airlines 4 2026-05-03
SWA49 Southwest Airlines 4 2026-06-22
SWA4195 - 4 2026-07-06
SWA389 Southwest Airlines 4 2026-04-17
SWA353 Southwest Airlines 4 2026-06-13
SWA2758 - 4 2026-07-15
SWA2644 Southwest Airlines 4 2026-05-31
SWA165 Southwest Airlines 4 2026-06-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA1677 CVG → MCO Jul 26, 21:50 UTCJul 26, 22:30 UTC40m
2026-07-26 SWA1004 STL → LAS Jul 26, 19:15 UTCJul 26, 20:15 UTC1h 0m
2026-07-26 SWA2355 LAS → HNL Jul 26, 16:50 UTCJul 26, 18:05 UTC1h 15m
2026-07-26 SWA1003 SJC → SNA Jul 26, 14:35 UTCJul 26, 15:35 UTC1h 0m
2026-07-26 SWA1899 MDW → DCA Jul 26, 12:10 UTCJul 26, 13:10 UTC1h 0m
2026-07-26 SWA4563 BOI → SMF Jul 26, 02:35 UTCJul 26, 03:10 UTC35m
2026-07-26 SWA2607 MCO → ALB Jul 26, 00:00 UTCJul 26, 01:35 UTC1h 35m
2026-07-25 SWA3680 SJC → LAS Jul 25, 20:10 UTCJul 25, 22:25 UTC2h 15m
2026-07-25 SWA3370 AUS → LAS Jul 25, 16:50 UTCJul 25, 19:05 UTC2h 15m
2026-07-25 SWA3370 AUS → LAS Jul 25, 13:10 UTCJul 25, 15:30 UTC2h 20m
2026-07-25 SWA3998 PHX → DEN Jul 25, 10:00 UTCJul 25, 11:55 UTC1h 55m
2026-07-25 SWA1417 ABQ → OAK Jul 25, 01:00 UTCJul 25, 03:10 UTC2h 10m
2026-07-24 SWA1417 ABQ → OAK Jul 24, 23:00 UTCJul 25, 00:15 UTC1h 15m
2026-07-24 SWA1417 ABQ → OAK Jul 24, 18:35 UTCJul 24, 21:55 UTC3h 20m
2026-07-24 SWA827 DEN → PHL Jul 24, 16:35 UTCJul 24, 17:35 UTC1h 0m
2026-07-24 SWA827 DEN → PHL Jul 24, 16:30 UTCJul 24, 17:20 UTC50m
2026-07-24 SWA2196 MDW → MEM Jul 24, 13:50 UTCJul 24, 14:35 UTC45m
2026-07-24 SWA799 MDW → BOS Jul 24, 06:00 UTCJul 24, 06:45 UTC45m
2026-07-24 SWA799 MDW → BOS Jul 24, 05:55 UTCJul 24, 06:36 UTC42m
2026-07-24 SWA4228 MYR → MDW Jul 24, 04:30 UTCJul 24, 05:20 UTC50m
2026-07-24 SWA4228 MYR → MDW Jul 24, 04:28 UTCJul 24, 05:19 UTC51m
2026-07-24 SWA4779 MDW → PHL Jul 24, 00:20 UTCJul 24, 03:30 UTC3h 10m
2026-07-23 SWA771 SJC → SAN Jul 23, 20:20 UTCJul 23, 23:05 UTC2h 45m
2026-07-23 SWA3635 ABQ → SAN Jul 23, 18:25 UTCJul 23, 19:20 UTC55m
2026-07-23 SWA4363 TPA → MKE Jul 23, 13:33 UTCJul 23, 16:42 UTC3h 9m
2026-07-23 SWA4363 TPA → MKE Jul 23, 13:35 UTCJul 23, 16:50 UTC3h 15m
2026-07-23 SWA4363 TPA → MKE Jul 23, 10:10 UTCJul 23, 11:55 UTC1h 45m
2026-07-23 SWA4626 LAX → OAK Jul 23, 01:15 UTCJul 23, 02:40 UTC1h 25m
2026-07-23 SWA4626 LAX → OAK Jul 23, 01:10 UTCJul 23, 02:36 UTC1h 26m
2026-07-22 SWA4067 LAS → SFO Jul 22, 22:25 UTCJul 23, 00:10 UTC1h 45m
2026-07-22 SWA733 ATL → CLE Jul 22, 20:10 UTCJul 22, 21:30 UTC1h 20m
2026-07-22 SWA733 ATL → CLE Jul 22, 20:09 UTCJul 22, 21:25 UTC1h 16m
2026-07-22 SWA733 ATL → CLE Jul 22, 17:20 UTCJul 22, 19:15 UTC1h 55m
2026-07-22 SWA4584 HOU → MAF Jul 22, 14:30 UTCJul 22, 15:55 UTC1h 25m
2026-07-21 SWA937 SJC → SNA Jul 21, 17:00 UTCJul 21, 17:45 UTC45m
2026-07-21 SWA937 SJC → SNA Jul 21, 15:00 UTCJul 21, 15:50 UTC50m
2026-07-21 SWA937 SJC → SNA Jul 21, 13:10 UTCJul 21, 13:55 UTC45m
2026-07-21 SWA3121 SMF → BUR Jul 21, 10:10 UTCJul 21, 11:50 UTC1h 40m
2026-07-21 SWA3881 - Jul 21, 03:30 UTCJul 21, 05:05 UTC1h 35m
2026-07-21 SWA3881 MDW → OKC Jul 21, 03:25 UTCJul 21, 04:55 UTC1h 30m
2026-07-21 SWA233 PWM → BWI Jul 21, 01:00 UTCJul 21, 02:30 UTC1h 30m
2026-07-20 SWA3882 STL → ATL Jul 20, 22:35 UTCJul 20, 23:55 UTC1h 19m
2026-07-20 SWA1461 MDW → MIA Jul 20, 19:00 UTCJul 20, 20:45 UTC1h 45m
2026-07-20 SWA1294 - Jul 20, 16:45 UTCJul 20, 18:05 UTC1h 20m
2026-07-20 SWA1294 HOU → MDW Jul 20, 13:25 UTCJul 20, 15:30 UTC2h 5m
2026-07-20 SWA4729 ATL → HOU Jul 20, 10:45 UTCJul 20, 12:15 UTC1h 30m
2026-07-20 SWA680 TPA → ATL Jul 20, 02:55 UTCJul 20, 03:55 UTC1h 0m
2026-07-19 SWA956 BWI → TPA Jul 19, 23:50 UTCJul 20, 01:50 UTC2h 0m
2026-07-19 SWA956 BWI → HOU Jul 19, 23:50 UTCJul 20, 01:53 UTC2h 3m
2026-07-19 SWA941 TPA → BWI Jul 19, 20:45 UTCJul 19, 22:45 UTC2h 0m

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 N7868K page for operator, model, and routing details .

Mode-S AAAA4A frequently asked

What is Mode-S code AAAA4A?
AAAA4A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N7868K.
Where is Mode-S AAAA4A registered?
Mode-S code AAAA4A 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 AAAA4A broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AAAA4A, octal 52525112, decimal 11,184,714.
What flights does AAAA4A operate?
Mode-S AAAA4A has broadcast 20 distinct callsigns, including SWA1761, SWA3118, SWA598, SWA2986, SWA188.