Apparatus

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sensors Mode-S transponder

A1D44E

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N217JC · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
A1D44E
Octal
50352116
Decimal
10,605,646
Country
US
Tail
N217JC
Type
B737
No current signal · last broadcast Jul 26, 21:30 UTC
Flights observed
725
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:30 UTC

Last known position

Most recent position reported by Mode-S A1D44E.

Country allocation

The ICAO 24-bit address A1D44E 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
SWA1677 Southwest Airlines 8 2026-07-24
SWA2699 Southwest Airlines 6 2026-05-12
SWA4206 - 5 2026-07-03
SWA1723 Southwest Airlines 5 2026-05-27
SWA1418 Southwest Airlines 5 2026-04-18
SWA1227 Southwest Airlines 5 2026-07-25
SWA1103 - 5 2026-07-17
SWA962 - 4 2026-07-03
SWA950 - 4 2026-07-15
SWA813 Southwest Airlines 4 2026-07-24
SWA700 Southwest Airlines 4 2026-07-25
SWA4265 - 4 2026-06-25
SWA4219 Southwest Airlines 4 2026-07-26
SWA342 - 4 2026-06-25
SWA3419 Southwest Airlines 4 2026-04-24
SWA2896 Southwest Airlines 4 2026-06-12
SWA2433 Southwest Airlines 4 2026-05-01
SWA2368 - 4 2026-04-13
SWA2335 Southwest Airlines 4 2026-05-05
SWA194 - 4 2026-06-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA1132 SAN → SJC Jul 26, 21:05 UTCJul 26, 21:30 UTC25m
2026-07-26 SWA4219 MSP → TPA Jul 26, 18:11 UTCJul 26, 19:26 UTC1h 15m
2026-07-26 SWA4219 MSP → TPA Jul 26, 18:10 UTCJul 26, 18:50 UTC40m
2026-07-26 SWA4219 MSP → TPA Jul 26, 15:05 UTCJul 26, 16:55 UTC1h 50m
2026-07-25 SWA527 BWI → PVD Jul 25, 23:55 UTCJul 26, 01:50 UTC1h 55m
2026-07-25 SWA700 SMF → ONT Jul 25, 21:25 UTCJul 25, 22:55 UTC1h 30m
2026-07-25 SWA3071 STL → MDW Jul 25, 17:50 UTCJul 25, 20:30 UTC2h 40m
2026-07-25 SWA3071 STL → MDW Jul 25, 17:44 UTCJul 25, 20:28 UTC2h 44m
2026-07-25 SWA3906 IAD → DEN Jul 25, 14:04 UTCJul 25, 16:49 UTC2h 46m
2026-07-25 SWA3906 IAD → DEN Jul 25, 14:05 UTCJul 25, 16:50 UTC2h 45m
2026-07-25 SWA1227 ONT → OAK Jul 25, 05:00 UTCJul 25, 05:30 UTC30m
2026-07-25 SWA1227 ONT → OAK Jul 25, 04:55 UTCJul 25, 05:39 UTC45m
2026-07-25 SWA1227 ONT → OAK Jul 25, 02:05 UTCJul 25, 03:35 UTC1h 30m
2026-07-25 SWA3064 LAS → OAK Jul 25, 00:00 UTCJul 25, 01:20 UTC1h 20m
2026-07-24 SWA4237 SDF → TPA Jul 24, 21:20 UTCJul 24, 23:00 UTC1h 40m
2026-07-24 SWA1677 CVG → MCO Jul 24, 18:45 UTCJul 24, 19:50 UTC1h 5m
2026-07-24 SWA1677 CVG → MCO Jul 24, 16:50 UTCJul 24, 17:35 UTC45m
2026-07-24 SWA813 BOS → MDW Jul 24, 14:05 UTCJul 24, 15:10 UTC1h 5m
2026-07-24 SWA3248 STL → BOS Jul 24, 04:15 UTCJul 24, 05:10 UTC55m
2026-07-24 SWA4461 LAX → SFO Jul 24, 02:45 UTCJul 24, 03:30 UTC45m
2026-07-24 SWA4461 LAX → SFO Jul 24, 00:50 UTCJul 24, 01:40 UTC50m
2026-07-23 SWA4461 LAX → SFO Jul 23, 21:35 UTCJul 23, 23:40 UTC2h 5m
2026-07-23 SWA3495 - Jul 23, 18:30 UTCJul 23, 20:25 UTC1h 55m
2026-07-23 SWA4261 ABQ → DEN Jul 23, 16:00 UTCJul 23, 17:00 UTC1h 0m
2026-07-23 SWA383 LAX → SJC Jul 23, 13:40 UTCJul 23, 14:25 UTC45m
2026-07-23 SWA4984 MKE → MCI Jul 23, 03:10 UTCJul 23, 04:10 UTC1h 0m
2026-07-23 SWA1322 OAK → BUR Jul 23, 01:15 UTCJul 23, 02:20 UTC1h 5m
2026-07-22 SWA1322 OAK → BUR Jul 22, 21:40 UTCJul 23, 00:05 UTC2h 25m
2026-07-22 SWA1322 OAK → BUR Jul 22, 19:35 UTCJul 22, 20:25 UTC50m
2026-07-22 SWA647 - Jul 22, 17:55 UTCJul 22, 18:35 UTC40m
2026-07-22 SWA647 - Jul 22, 15:10 UTCJul 22, 16:25 UTC1h 15m
2026-07-22 SWA647 BNA → PNS Jul 22, 13:20 UTCJul 22, 14:20 UTC1h 0m
2026-07-22 SWA3388 ABQ → MDW Jul 22, 11:35 UTCJul 22, 11:50 UTC15m
2026-07-22 SWA694 - Jul 22, 00:30 UTCJul 22, 01:00 UTC30m
2026-07-21 SWA1266 LGA → MSY Jul 21, 20:10 UTCJul 21, 22:35 UTC2h 25m
2026-07-21 SWA1266 LGA → MSY Jul 21, 18:15 UTCJul 21, 19:10 UTC55m
2026-07-21 SWA275 BWI → DEN Jul 21, 13:40 UTCJul 21, 17:10 UTC3h 30m
2026-07-21 SWA275 TPA → BWI Jul 21, 10:45 UTCJul 21, 12:40 UTC1h 55m
2026-07-21 SWA4494 MSY → MDW Jul 21, 02:10 UTCJul 21, 06:15 UTC4h 5m
2026-07-21 SWA4494 MSY → MDW Jul 21, 02:06 UTCJul 21, 06:14 UTC4h 8m
2026-07-20 SWA3257 - Jul 20, 19:35 UTCJul 20, 20:55 UTC1h 20m
2026-07-20 SWA3257 - Jul 20, 16:20 UTCJul 20, 17:45 UTC1h 25m
2026-07-20 SWA1396 STL → DAL Jul 20, 10:25 UTCJul 20, 11:35 UTC1h 10m
2026-07-20 SWA2905 - Jul 20, 03:10 UTCJul 20, 03:55 UTC45m
2026-07-20 SWA2905 MDW → STL Jul 20, 03:05 UTCJul 20, 03:45 UTC40m
2026-07-20 SWA2693 - Jul 20, 00:50 UTCJul 20, 02:10 UTC1h 20m
2026-07-19 SWA2693 - Jul 19, 23:10 UTCJul 20, 00:00 UTC50m
2026-07-19 SWA2693 - Jul 19, 19:50 UTCJul 19, 21:50 UTC2h 0m
2026-07-19 SWA4737 - Jul 19, 16:20 UTCJul 19, 18:35 UTC2h 15m
2026-07-19 SWA208 - Jul 19, 14:10 UTCJul 19, 15:05 UTC55m

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 N217JC page for operator, model, and routing details .

Mode-S A1D44E frequently asked

What is Mode-S code A1D44E?
A1D44E is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N217JC.
Where is Mode-S A1D44E registered?
Mode-S code A1D44E 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 A1D44E broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1D44E, octal 50352116, decimal 10,605,646.
What flights does A1D44E operate?
Mode-S A1D44E has broadcast 20 distinct callsigns, including SWA1677, SWA2699, SWA4206, SWA1723, SWA1418.