Apparatus

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sensors Mode-S transponder

AD61DE

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N961WN · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
AD61DE
Octal
53260736
Decimal
11,362,782
Country
US
Tail
N961WN
Type
B737
No current signal · last broadcast Jul 26, 20:25 UTC
Flights observed
779
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:25 UTC

Last known position

Most recent position reported by Mode-S AD61DE.

Country allocation

The ICAO 24-bit address AD61DE 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
SWA300 - 11 2026-06-30
SWA2451 Southwest Airlines 9 2026-05-04
SWA3438 Southwest Airlines 6 2026-06-05
SWA1278 Southwest Airlines 6 2026-06-01
SWA670 Southwest Airlines 5 2026-07-25
SWA576 Southwest Airlines 5 2026-04-23
SWA470 Southwest Airlines 5 2026-07-18
SWA2724 Southwest Airlines 5 2026-06-14
SWA910 Southwest Airlines 4 2026-07-23
SWA826 Southwest Airlines 4 2026-05-14
SWA496 - 4 2026-07-13
SWA4724 - 4 2026-06-24
SWA4703 Southwest Airlines 4 2026-05-03
SWA4363 - 4 2026-07-11
SWA4272 Southwest Airlines 4 2026-05-17
SWA4244 Southwest Airlines 4 2026-05-12
SWA3931 - 4 2026-06-18
SWA3776 Southwest Airlines 4 2026-04-18
SWA3472 Southwest Airlines 4 2026-05-22
SWA3270 Southwest Airlines 4 2026-04-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA4013 BWI → BOS Jul 26, 17:30 UTCJul 26, 20:25 UTC2h 55m
2026-07-26 SWA4013 BWI → BOS Jul 26, 15:25 UTCJul 26, 16:30 UTC1h 5m
2026-07-26 SWA991 MDW → CLE Jul 26, 12:10 UTCJul 26, 14:10 UTC2h 0m
2026-07-25 SWA2162 PHX → AUS Jul 25, 23:35 UTCJul 26, 02:35 UTC3h 0m
2026-07-25 SWA2162 PHX → AUS Jul 25, 23:34 UTCJul 26, 02:32 UTC2h 58m
2026-07-25 SWA670 SJC → BOI Jul 25, 18:35 UTCJul 25, 22:15 UTC3h 40m
2026-07-25 SWA670 SJC → BOI Jul 25, 17:05 UTCJul 25, 17:40 UTC35m
2026-07-25 SWA670 SJC → BOI Jul 25, 14:05 UTCJul 25, 16:10 UTC2h 5m
2026-07-25 SWA4456 SJC → PDX Jul 25, 11:10 UTCJul 25, 12:40 UTC1h 30m
2026-07-25 SWA983 SJC → DEN Jul 25, 03:10 UTCJul 25, 05:25 UTC2h 15m
2026-07-25 SWA983 SJC → DEN Jul 25, 03:07 UTCJul 25, 05:23 UTC2h 16m
2026-07-25 SWA983 SJC → DEN Jul 25, 00:10 UTCJul 25, 02:25 UTC2h 15m
2026-07-24 SWA4913 BWI → BOS Jul 24, 22:45 UTCJul 24, 23:20 UTC35m
2026-07-24 SWA4913 BWI → BOS Jul 24, 20:20 UTCJul 24, 23:20 UTC3h 0m
2026-07-24 SWA4913 BWI → BOS Jul 24, 20:19 UTCJul 24, 22:30 UTC2h 11m
2026-07-24 SWA4065 DEN → ORD Jul 24, 17:40 UTCJul 24, 19:10 UTC1h 30m
2026-07-24 SWA4065 DEN → ORD Jul 24, 17:39 UTCJul 24, 19:06 UTC1h 28m
2026-07-24 SWA205 BWI → MHT Jul 24, 15:10 UTCJul 24, 16:40 UTC1h 30m
2026-07-24 SWA738 SAN → SJC Jul 24, 12:05 UTCJul 24, 14:15 UTC2h 10m
2026-07-24 SWA738 SAN → SJC Jul 24, 12:04 UTCJul 24, 14:12 UTC2h 8m
2026-07-24 SWA3083 OAK → SAN Jul 24, 10:35 UTCJul 24, 11:05 UTC30m
2026-07-24 SWA3083 OAK → SAN Jul 24, 10:30 UTCJul 24, 11:01 UTC31m
2026-07-24 SWA2678 SNA → SJC Jul 24, 01:05 UTCJul 24, 01:35 UTC30m
2026-07-24 SWA2678 SNA → SJC Jul 24, 01:03 UTCJul 24, 01:34 UTC31m
2026-07-23 SWA910 PHX → SAN Jul 23, 22:10 UTCJul 23, 23:40 UTC1h 30m
2026-07-23 SWA910 PHX → SAN Jul 23, 22:05 UTCJul 23, 23:37 UTC1h 33m
2026-07-23 SWA910 PHX → SAN Jul 23, 19:25 UTCJul 23, 21:05 UTC1h 40m
2026-07-23 SWA910 PHX → SAN Jul 23, 17:40 UTCJul 23, 18:15 UTC35m
2026-07-23 SWA2379 TPA → ALB Jul 23, 13:45 UTCJul 23, 16:25 UTC2h 40m
2026-07-23 SWA2379 TPA → ALB Jul 23, 13:42 UTCJul 23, 16:15 UTC2h 33m
2026-07-23 SWA2396 BWI → LAS Jul 23, 03:39 UTCJul 23, 04:39 UTC1h 0m
2026-07-23 SWA2396 BWI → LAS Jul 23, 03:40 UTCJul 23, 04:45 UTC1h 5m
2026-07-23 SWA3487 HOU → MSY Jul 23, 00:45 UTCJul 23, 02:30 UTC1h 45m
2026-07-23 SWA3487 HOU → MSY Jul 23, 00:40 UTCJul 23, 02:25 UTC1h 45m
2026-07-22 SWA4769 ALB → FLL Jul 22, 21:20 UTCJul 22, 23:28 UTC2h 8m
2026-07-22 SWA4769 ALB → FLL Jul 22, 21:25 UTCJul 22, 23:30 UTC2h 5m
2026-07-22 SWA4290 PDX → LAS Jul 22, 19:00 UTCJul 22, 20:15 UTC1h 15m
2026-07-22 SWA4290 PDX → LAS Jul 22, 19:05 UTCJul 22, 20:15 UTC1h 10m
2026-07-22 SWA2855 LAS → SJC Jul 22, 16:35 UTCJul 22, 17:30 UTC55m
2026-07-22 SWA2855 LAS → SJC Jul 22, 16:30 UTCJul 22, 17:31 UTC1h 1m
2026-07-22 SWA2865 PHX → SJC Jul 22, 11:30 UTCJul 22, 15:30 UTC4h 0m
2026-07-22 SWA472 BUR → SJC Jul 22, 01:40 UTCJul 22, 03:35 UTC1h 55m
2026-07-21 SWA472 BUR → SJC Jul 21, 22:15 UTCJul 22, 00:45 UTC2h 30m
2026-07-21 SWA1563 BNA → LGA Jul 21, 19:55 UTCJul 21, 21:10 UTC1h 15m
2026-07-21 SWA1563 BNA → LGA Jul 21, 17:20 UTCJul 21, 18:30 UTC1h 10m
2026-07-21 SWA537 AUS → MSY Jul 21, 15:35 UTCJul 21, 16:25 UTC50m
2026-07-21 SWA537 AUS → MSY Jul 21, 15:33 UTCJul 21, 16:20 UTC47m
2026-07-21 SWA1473 LAS → SJC Jul 21, 12:35 UTCJul 21, 13:45 UTC1h 10m
2026-07-21 SWA2982 SAN → OAK Jul 21, 00:55 UTCJul 21, 01:45 UTC50m
2026-07-21 SWA2982 SAN → OAK Jul 21, 00:52 UTCJul 21, 01:45 UTC53m

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 N961WN page for operator, model, and routing details .

Mode-S AD61DE frequently asked

What is Mode-S code AD61DE?
AD61DE is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N961WN.
Where is Mode-S AD61DE registered?
Mode-S code AD61DE 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 AD61DE broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD61DE, octal 53260736, decimal 11,362,782.
What flights does AD61DE operate?
Mode-S AD61DE has broadcast 20 distinct callsigns, including SWA300, SWA2451, SWA3438, SWA1278, SWA670.