Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AAADDC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N7877H · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
AAADDC
Octal
52526734
Decimal
11,185,628
Country
US
Tail
N7877H
Type
B737
No current signal · last broadcast 1h ago
Flights observed
702
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S AAADDC.

Country allocation

The ICAO 24-bit address AAADDC 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
SWA3544 - 7 2026-07-04
SWA267 Southwest Airlines 7 2026-04-18
SWA826 Southwest Airlines 6 2026-05-27
SWA1104 Southwest Airlines 6 2026-05-28
SWA436 Southwest Airlines 5 2026-05-26
SWA266 Southwest Airlines 5 2026-05-27
SWA2224 - 5 2026-07-12
SWA2194 Southwest Airlines 5 2026-05-10
SWA654 - 4 2026-07-09
SWA4297 Southwest Airlines 4 2026-05-28
SWA3969 Southwest Airlines 4 2026-04-17
SWA311 - 4 2026-07-01
SWA2448 Southwest Airlines 4 2026-05-10
SWA1795 Southwest Airlines 4 2026-06-09
SWA1771 Southwest Airlines 4 2026-06-04
SWA174 - 4 2026-06-27
SWA1706 Southwest Airlines 4 2026-04-30
SWA1700 Southwest Airlines 4 2026-06-22
SWA1479 Southwest Airlines 4 2026-05-04
SWA1327 Southwest Airlines 4 2026-04-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 SWA1912 - Jul 15, 00:45 UTCJul 15, 01:00 UTC15m
2026-07-14 SWA127 - Jul 14, 21:20 UTCJul 14, 23:00 UTC1h 39m
2026-07-14 SWA4528 - Jul 14, 16:55 UTCJul 14, 20:15 UTC3h 20m
2026-07-14 SWA4528 - Jul 14, 14:40 UTCJul 14, 15:55 UTC1h 15m
2026-07-14 SWA4439 - Jul 14, 12:30 UTCJul 14, 13:35 UTC1h 5m
2026-07-14 SWA4439 BWI → PWM Jul 14, 12:26 UTCJul 14, 13:40 UTC1h 14m
2026-07-14 SWA2746 - Jul 14, 03:55 UTCJul 14, 05:20 UTC1h 25m
2026-07-14 SWA2693 - Jul 14, 01:50 UTCJul 14, 03:05 UTC1h 15m
2026-07-13 SWA2693 MCO → ROC Jul 13, 22:50 UTCJul 14, 01:10 UTC2h 20m
2026-07-13 SWA2051 - Jul 13, 19:25 UTCJul 13, 21:35 UTC2h 10m
2026-07-13 SWA2051 - Jul 13, 17:15 UTCJul 13, 18:15 UTC1h 0m
2026-07-13 SWA2051 - Jul 13, 12:40 UTCJul 13, 15:15 UTC2h 35m
2026-07-13 SWA2579 - Jul 13, 06:20 UTCJul 13, 07:01 UTC40m
2026-07-13 SWA2436 PHX → ONT Jul 13, 04:53 UTCJul 13, 05:41 UTC48m
2026-07-13 SWA2436 - Jul 13, 04:55 UTCJul 13, 05:45 UTC50m
2026-07-13 SWA4538 - Jul 13, 03:15 UTCJul 13, 03:40 UTC25m
2026-07-13 SWA4538 BUR → PHX Jul 13, 01:55 UTCJul 13, 03:40 UTC1h 45m
2026-07-13 SWA4538 BUR → PHX Jul 13, 01:51 UTCJul 13, 02:56 UTC1h 5m
2026-07-13 SWA3878 - Jul 13, 00:01 UTCJul 13, 01:01 UTC1h 0m
2026-07-12 SWA3878 STS → BUR Jul 12, 23:58 UTCJul 13, 00:58 UTC1h 0m
2026-07-12 SWA2224 LAS → STS Jul 12, 21:36 UTCJul 12, 22:41 UTC1h 5m
2026-07-12 SWA2224 - Jul 12, 21:35 UTCJul 12, 22:50 UTC1h 15m
2026-07-12 SWA2224 PHX → LAS Jul 12, 19:20 UTCJul 12, 19:55 UTC35m
2026-07-12 SWA3708 - Jul 12, 17:20 UTCJul 12, 18:20 UTC1h 0m
2026-07-12 SWA3708 SNA → PHX Jul 12, 17:19 UTCJul 12, 18:20 UTC1h 1m
2026-07-12 SWA3708 SJC → SNA Jul 12, 15:10 UTCJul 12, 16:10 UTC1h 0m
2026-07-12 SWA280 LAS → SJC Jul 12, 13:10 UTCJul 12, 14:05 UTC55m
2026-07-12 SWA2173 - Jul 12, 00:25 UTCJul 12, 03:01 UTC2h 35m
2026-07-12 SWA2173 HOU → LAS Jul 12, 00:24 UTCJul 12, 02:58 UTC2h 35m
2026-07-11 SWA3225 - Jul 11, 20:40 UTCJul 11, 23:35 UTC2h 55m
2026-07-11 SWA3225 LAX → HOU Jul 11, 20:37 UTCJul 11, 23:39 UTC3h 2m
2026-07-11 SWA3225 OAK → LAX Jul 11, 18:20 UTCJul 11, 19:25 UTC1h 5m
2026-07-11 SWA1254 LAS → OAK Jul 11, 16:20 UTCJul 11, 17:20 UTC1h 0m
2026-07-11 SWA1254 COS → LAS Jul 11, 13:25 UTCJul 11, 14:55 UTC1h 30m
2026-07-11 SWA3811 DEN → COS Jul 11, 04:34 UTCJul 11, 04:50 UTC16m
2026-07-11 SWA3811 DEN → COS Jul 11, 04:35 UTCJul 11, 04:55 UTC20m
2026-07-11 SWA1645 ABQ → DEN Jul 11, 02:15 UTCJul 11, 03:20 UTC1h 5m
2026-07-10 SWA1645 - Jul 10, 20:55 UTCJul 11, 01:00 UTC4h 5m
2026-07-10 SWA3319 - Jul 10, 18:15 UTCJul 10, 19:55 UTC1h 40m
2026-07-10 SWA4353 - Jul 10, 16:00 UTCJul 10, 17:30 UTC1h 30m
2026-07-10 SWA4353 - Jul 10, 14:05 UTCJul 10, 14:55 UTC50m
2026-07-10 SWA4705 - Jul 10, 11:40 UTCJul 10, 12:45 UTC1h 5m
2026-07-10 SWA4437 - Jul 10, 00:55 UTCJul 10, 01:55 UTC1h 0m
2026-07-09 SWA297 - Jul 9, 17:30 UTCJul 9, 18:15 UTC45m
2026-07-09 SWA297 - Jul 9, 15:15 UTCJul 9, 16:45 UTC1h 30m
2026-07-09 SWA4853 DCA → STL Jul 9, 12:35 UTCJul 9, 14:20 UTC1h 45m
2026-07-09 SWA654 STL → DCA Jul 9, 01:10 UTCJul 9, 02:45 UTC1h 35m
2026-07-09 SWA654 STL → DCA Jul 9, 01:07 UTCJul 9, 02:39 UTC1h 32m
2026-07-08 SWA654 - Jul 8, 22:35 UTCJul 9, 00:10 UTC1h 35m
2026-07-08 SWA654 - Jul 8, 20:20 UTCJul 8, 21:40 UTC1h 20m

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 N7877H page for operator, model, and routing details .

Mode-S AAADDC frequently asked

What is Mode-S code AAADDC?
AAADDC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N7877H.
Where is Mode-S AAADDC registered?
Mode-S code AAADDC 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 AAADDC broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AAADDC, octal 52526734, decimal 11,185,628.
What flights does AAADDC operate?
Mode-S AAADDC has broadcast 20 distinct callsigns, including SWA3544, SWA267, SWA826, SWA1104, SWA436.