Apparatus

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sensors Mode-S transponder

AB635D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8329B · BOEING 737-800 · operated by UMB BANK NA TRUSTEE

Hex
AB635D
Octal
52661535
Decimal
11,232,093
Country
US
Tail
N8329B
Type
B738
No current signal · last broadcast Jul 26, 20:45 UTC
Flights observed
714
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:45 UTC

Last known position

Most recent position reported by Mode-S AB635D.

Country allocation

The ICAO 24-bit address AB635D 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
SWA995 Southwest Airlines 4 2026-04-14
SWA587 Southwest Airlines 4 2026-05-15
SWA3855 Southwest Airlines 4 2026-05-27
SWA367 - 4 2026-06-16
SWA3486 Southwest Airlines 4 2026-07-25
SWA306 - 4 2026-07-10
SWA2731 - 4 2026-07-07
SWA2720 - 4 2026-07-13
SWA2697 Southwest Airlines 4 2026-04-18
SWA1995 Southwest Airlines 4 2026-05-15
SWA1821 Southwest Airlines 4 2026-05-05
SWA1049 Southwest Airlines 4 2026-07-21
SWA960 - 3 2026-06-22
SWA899 - 3 2026-06-26
SWA679 Southwest Airlines 3 2026-05-26
SWA667 Southwest Airlines 3 2026-04-15
SWA470 Southwest Airlines 3 2026-05-09
SWA46 Southwest Airlines 3 2026-07-26
SWA454 Southwest Airlines 3 2026-05-02
SWA4241 - 3 2026-07-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA4441 SJC → PHX Jul 26, 17:35 UTCJul 26, 20:40 UTC3h 5m
2026-07-26 SWA1866 LAS → MDW Jul 26, 14:10 UTCJul 26, 16:10 UTC2h 0m
2026-07-26 SWA1866 LAS → MDW Jul 26, 10:25 UTCJul 26, 13:05 UTC2h 40m
2026-07-26 SWA46 HOU → DAL Jul 26, 01:10 UTCJul 26, 03:40 UTC2h 30m
2026-07-26 SWA46 HOU → DAL Jul 26, 01:08 UTCJul 26, 03:35 UTC2h 28m
2026-07-25 SWA46 HOU → DAL Jul 25, 23:00 UTCJul 25, 23:45 UTC45m
2026-07-25 SWA3592 CMH → SRQ Jul 25, 20:00 UTCJul 25, 21:50 UTC1h 50m
2026-07-25 SWA4103 PWM → BWI Jul 25, 17:20 UTCJul 25, 18:55 UTC1h 35m
2026-07-25 SWA4103 PWM → BWI Jul 25, 17:15 UTCJul 25, 18:46 UTC1h 31m
2026-07-25 SWA966 BWI → BOS Jul 25, 14:20 UTCJul 25, 16:05 UTC1h 45m
2026-07-25 SWA3486 ATL → TPA Jul 25, 09:55 UTCJul 25, 11:15 UTC1h 20m
2026-07-25 SWA3486 ATL → TPA Jul 25, 05:20 UTCJul 25, 08:55 UTC3h 35m
2026-07-24 SWA133 ALB → BWI Jul 24, 23:20 UTCJul 25, 03:30 UTC4h 10m
2026-07-24 SWA823 STL → PHL Jul 24, 19:45 UTCJul 24, 22:25 UTC2h 40m
2026-07-24 SWA823 STL → PHL Jul 24, 17:45 UTCJul 24, 18:35 UTC50m
2026-07-24 SWA1059 SFO → PHX Jul 24, 15:30 UTCJul 24, 16:15 UTC45m
2026-07-24 SWA852 LAS → SJC Jul 24, 12:45 UTCJul 24, 14:30 UTC1h 45m
2026-07-24 SWA2304 PHX → SEA Jul 24, 07:15 UTCJul 24, 10:30 UTC3h 15m
2026-07-24 SWA1716 MCO → BNA Jul 24, 03:15 UTCJul 24, 05:40 UTC2h 25m
2026-07-23 SWA2887 SAN → SFO Jul 23, 22:10 UTCJul 24, 01:20 UTC3h 10m
2026-07-23 SWA1506 SAN → OAK Jul 23, 18:35 UTCJul 23, 20:55 UTC2h 20m
2026-07-23 SWA2222 LAS → OAK Jul 23, 15:25 UTCJul 23, 17:15 UTC1h 50m
2026-07-23 SWA2222 LAS → OAK Jul 23, 15:23 UTCJul 23, 17:13 UTC1h 50m
2026-07-23 SWA2222 LAS → OAK Jul 23, 13:20 UTCJul 23, 14:20 UTC1h 0m
2026-07-23 SWA4772 GSP → BWI Jul 23, 06:20 UTCJul 23, 07:20 UTC1h 0m
2026-07-23 SWA2601 PDX → SJC Jul 23, 03:30 UTCJul 23, 04:50 UTC1h 20m
2026-07-23 SWA4842 FLL → IND Jul 23, 01:00 UTCJul 23, 02:05 UTC1h 5m
2026-07-22 SWA4486 MDW → SFO Jul 22, 20:40 UTCJul 22, 23:25 UTC2h 45m
2026-07-22 SWA4486 MDW → SFO Jul 22, 20:39 UTCJul 22, 23:18 UTC2h 39m
2026-07-22 SWA709 SJC → LAX Jul 22, 17:15 UTCJul 22, 19:15 UTC2h 0m
2026-07-22 SWA709 SJC → LAX Jul 22, 17:12 UTCJul 22, 19:15 UTC2h 3m
2026-07-22 SWA3483 MDW → ALB Jul 22, 12:15 UTCJul 22, 15:35 UTC3h 20m
2026-07-22 SWA1843 - Jul 22, 05:00 UTCJul 22, 05:25 UTC25m
2026-07-22 SWA1843 OAK → SEA Jul 22, 04:55 UTCJul 22, 06:16 UTC1h 21m
2026-07-22 SWA1843 DEN → OAK Jul 22, 02:05 UTCJul 22, 04:05 UTC2h 0m
2026-07-21 SWA1049 MDW → SDF Jul 21, 22:10 UTCJul 22, 00:35 UTC2h 25m
2026-07-21 SWA1049 MDW → SDF Jul 21, 19:05 UTCJul 21, 20:35 UTC1h 30m
2026-07-21 SWA1049 MDW → SDF Jul 21, 16:35 UTCJul 21, 18:00 UTC1h 25m
2026-07-21 SWA1049 MDW → SDF Jul 21, 10:50 UTCJul 21, 15:00 UTC4h 10m
2026-07-21 SWA2745 STL → CLE Jul 21, 00:50 UTCJul 21, 02:05 UTC1h 15m
2026-07-20 SWA1539 BWI → PVD Jul 20, 23:00 UTCJul 20, 23:30 UTC30m
2026-07-20 SWA1539 BWI → PVD Jul 20, 22:55 UTCJul 20, 23:29 UTC34m
2026-07-20 SWA1539 BWI → PVD Jul 20, 19:45 UTCJul 20, 21:45 UTC2h 0m
2026-07-20 SWA699 - Jul 20, 16:55 UTCJul 20, 18:25 UTC1h 30m
2026-07-20 SWA818 SNA → SMF Jul 20, 13:55 UTCJul 20, 15:21 UTC1h 26m
2026-07-20 SWA818 SNA → SMF Jul 20, 13:55 UTCJul 20, 15:30 UTC1h 35m
2026-07-20 SWA3909 MKE → PHX Jul 20, 10:45 UTCJul 20, 12:35 UTC1h 50m
2026-07-20 SWA3280 AUS → TPA Jul 20, 04:15 UTCJul 20, 07:00 UTC2h 45m
2026-07-20 SWA4447 DEN → PHX Jul 20, 01:35 UTCJul 20, 02:55 UTC1h 20m
2026-07-19 SWA3497 STL → MCI Jul 19, 22:10 UTCJul 20, 00:10 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 N8329B page for operator, model, and routing details .

Mode-S AB635D frequently asked

What is Mode-S code AB635D?
AB635D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8329B.
Where is Mode-S AB635D registered?
Mode-S code AB635D 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 AB635D broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB635D, octal 52661535, decimal 11,232,093.
What flights does AB635D operate?
Mode-S AB635D has broadcast 20 distinct callsigns, including SWA995, SWA587, SWA3855, SWA367, SWA3486.