Apparatus

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sensors Mode-S transponder

AD3A5F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N951WN · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
AD3A5F
Octal
53235137
Decimal
11,352,671
Country
US
Tail
N951WN
Type
B737
Broadcasting now · callsign SWA1441 · 24,025 ft
Flights observed
590
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:45 UTC

Current position

AD3A5F is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AD3A5F 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
SWA3563 - 9 2026-07-10
SWA693 Southwest Airlines 7 2026-05-19
SWA758 Southwest Airlines 5 2026-07-08
SWA3120 Southwest Airlines 5 2026-05-12
SWA3054 Southwest Airlines 5 2026-05-22
SWA2948 Southwest Airlines 5 2026-05-01
SWA2242 - 5 2026-07-22
SWA1577 - 5 2026-06-20
SWA908 - 4 2026-06-24
SWA512 Southwest Airlines 4 2026-05-12
SWA389 Southwest Airlines 4 2026-05-16
SWA3871 Southwest Airlines 4 2026-04-25
SWA3799 Southwest Airlines 4 2026-05-14
SWA3546 Southwest Airlines 4 2026-05-02
SWA2644 Southwest Airlines 4 2026-04-24
SWA2422 Southwest Airlines 4 2026-06-29
SWA236 Southwest Airlines 4 2026-07-24
SWA2335 Southwest Airlines 4 2026-04-18
SWA1761 - 4 2026-04-15
SWA1476 - 4 2026-04-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA1514 OAK → ONT Jul 26, 20:40 UTCJul 26, 21:45 UTC1h 5m
2026-07-26 SWA655 LAS → OAK Jul 26, 18:03 UTCJul 26, 19:38 UTC1h 36m
2026-07-26 SWA4614 PHX → CVG Jul 26, 15:20 UTCJul 26, 17:00 UTC1h 40m
2026-07-26 SWA3139 BNA → LGA Jul 26, 13:25 UTCJul 26, 14:15 UTC50m
2026-07-26 SWA2845 RDU → BWI Jul 26, 01:50 UTCJul 26, 02:55 UTC1h 5m
2026-07-26 SWA2845 RDU → BWI Jul 26, 01:49 UTCJul 26, 02:50 UTC1h 1m
2026-07-25 SWA3911 BNA → BDL Jul 25, 22:00 UTCJul 26, 00:05 UTC2h 5m
2026-07-25 SWA3911 BNA → BDL Jul 25, 21:55 UTCJul 26, 00:02 UTC2h 7m
2026-07-25 SWA1698 BNA → MDW Jul 25, 17:25 UTCJul 25, 20:50 UTC3h 25m
2026-07-25 SWA1698 BNA → MDW Jul 25, 17:22 UTCJul 25, 20:48 UTC3h 27m
2026-07-25 SWA778 PHX → AUS Jul 25, 14:10 UTCJul 25, 16:00 UTC1h 50m
2026-07-25 SWA778 PHX → AUS Jul 25, 14:09 UTCJul 25, 15:57 UTC1h 48m
2026-07-25 SWA3443 SJC → BOI Jul 25, 03:55 UTCJul 25, 04:50 UTC55m
2026-07-25 SWA4875 CMH → MDW Jul 25, 01:56 UTCJul 25, 03:00 UTC1h 4m
2026-07-25 SWA4875 CMH → MDW Jul 25, 02:00 UTCJul 25, 03:00 UTC1h 0m
2026-07-24 SWA236 STL → HOU Jul 24, 20:10 UTCJul 25, 00:40 UTC4h 30m
2026-07-24 SWA236 STL → HOU Jul 24, 20:09 UTCJul 25, 00:40 UTC4h 31m
2026-07-24 SWA236 STL → HOU Jul 24, 17:40 UTCJul 24, 19:10 UTC1h 30m
2026-07-24 SWA236 STL → HOU Jul 24, 15:15 UTCJul 24, 16:20 UTC1h 5m
2026-07-24 SWA3139 - Jul 24, 13:00 UTCJul 24, 13:50 UTC50m
2026-07-24 SWA1659 BWI → BUF Jul 24, 01:55 UTCJul 24, 02:55 UTC1h 0m
2026-07-23 SWA2993 LAX → SFO Jul 23, 22:48 UTCJul 24, 00:50 UTC2h 2m
2026-07-23 SWA2993 LAX → SFO Jul 23, 22:50 UTCJul 23, 23:45 UTC55m
2026-07-23 SWA2298 SJC → SAN Jul 23, 20:25 UTCJul 23, 21:25 UTC1h 0m
2026-07-23 SWA2298 SJC → SAN Jul 23, 19:10 UTCJul 23, 19:50 UTC40m
2026-07-23 SWA2695 OAK → BUR Jul 23, 17:10 UTCJul 23, 18:05 UTC55m
2026-07-23 SWA2695 OAK → BUR Jul 23, 11:25 UTCJul 23, 15:45 UTC4h 20m
2026-07-22 SWA1458 OAK → LAS Jul 22, 22:20 UTCJul 23, 00:45 UTC2h 25m
2026-07-22 SWA1458 OAK → LAS Jul 22, 20:10 UTCJul 22, 21:05 UTC55m
2026-07-22 SWA2771 BUR → SFO Jul 22, 16:25 UTCJul 22, 19:00 UTC2h 35m
2026-07-22 SWA2242 - Jul 22, 13:50 UTCJul 22, 15:20 UTC1h 30m
2026-07-22 SWA2242 BNA → OKC Jul 22, 13:48 UTCJul 22, 15:15 UTC1h 27m
2026-07-22 SWA3592 CMH → SRQ Jul 22, 11:10 UTCJul 22, 11:55 UTC45m
2026-07-22 SWA3592 CMH → SRQ Jul 22, 10:52 UTCJul 22, 11:57 UTC1h 5m
2026-07-22 SWA4716 LAS → FAT Jul 22, 00:00 UTCJul 22, 01:00 UTC1h 0m
2026-07-21 SWA2373 LAS → HNL Jul 21, 20:11 UTCJul 21, 22:16 UTC2h 5m
2026-07-21 SWA2373 LAS → HNL Jul 21, 20:15 UTCJul 21, 22:20 UTC2h 5m
2026-07-21 SWA1218 ORD → AUS Jul 21, 17:05 UTCJul 21, 18:45 UTC1h 40m
2026-07-21 SWA1218 ORD → AUS Jul 21, 15:10 UTCJul 21, 15:50 UTC40m
2026-07-21 SWA1218 ORD → AUS Jul 21, 12:50 UTCJul 21, 14:15 UTC1h 25m
2026-07-21 SWA4487 VGT → COS Jul 21, 03:05 UTCJul 21, 04:35 UTC1h 30m
2026-07-21 SWA137 STL → JAX Jul 21, 00:35 UTCJul 21, 01:40 UTC1h 5m
2026-07-20 SWA4634 MDW → MSP Jul 20, 22:50 UTCJul 20, 23:40 UTC50m
2026-07-20 SWA3775 DCA → PVD Jul 20, 19:10 UTCJul 20, 21:20 UTC2h 10m
2026-07-20 SWA4454 - Jul 20, 17:05 UTCJul 20, 18:00 UTC55m
2026-07-20 SWA1840 - Jul 20, 14:40 UTCJul 20, 15:45 UTC1h 5m
2026-07-20 SWA1840 - Jul 20, 12:15 UTCJul 20, 13:15 UTC1h 0m
2026-07-20 SWA3821 BWI → PWM Jul 20, 03:50 UTCJul 20, 06:05 UTC2h 15m
2026-07-20 SWA2425 - Jul 20, 00:55 UTCJul 20, 02:00 UTC1h 5m
2026-07-19 SWA2425 - Jul 19, 21:35 UTCJul 19, 23:55 UTC2h 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 N951WN page for operator, model, and routing details .

Mode-S AD3A5F frequently asked

What is Mode-S code AD3A5F?
AD3A5F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N951WN.
Where is Mode-S AD3A5F registered?
Mode-S code AD3A5F 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 AD3A5F broadcasting right now?
Yes. Mode-S AD3A5F is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD3A5F, octal 53235137, decimal 11,352,671.
What flights does AD3A5F operate?
Mode-S AD3A5F has broadcast 20 distinct callsigns, including SWA3563, SWA693, SWA758, SWA3120, SWA3054.