Apparatus

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sensors Mode-S transponder

ABC49B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8576Z · BOEING 737-800 · operated by BANK OF UTAH TRUSTEE

Hex
ABC49B
Octal
52742233
Decimal
11,256,987
Country
US
Tail
N8576Z
Type
B738
No current signal · last broadcast Jul 26, 22:30 UTC
Flights observed
744
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:30 UTC

Last known position

Most recent position reported by Mode-S ABC49B.

Country allocation

The ICAO 24-bit address ABC49B 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
SWA4044 - 5 2026-07-11
SWA3919 - 5 2026-07-03
SWA3616 - 5 2026-06-29
SWA882 - 4 2026-07-14
SWA46 Southwest Airlines 4 2026-04-16
SWA3837 Southwest Airlines 4 2026-05-07
SWA3200 Southwest Airlines 4 2026-07-20
SWA2764 - 4 2026-06-23
SWA2251 - 4 2026-06-26
SWA1652 Southwest Airlines 4 2026-05-18
SWA1637 Southwest Airlines 4 2026-05-31
SWA1328 - 4 2026-06-25
SWA998 Southwest Airlines 3 2026-04-21
SWA859 Southwest Airlines 3 2026-04-29
SWA639 Southwest Airlines 3 2026-05-03
SWA546 - 3 2026-04-14
SWA4857 Southwest Airlines 3 2026-06-29
SWA4842 - 3 2026-04-13
SWA4714 Southwest Airlines 3 2026-06-18
SWA4632 Southwest Airlines 3 2026-04-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA143 LAS → SAN Jul 26, 19:15 UTCJul 26, 22:30 UTC3h 15m
2026-07-26 SWA143 LAS → SAN Jul 26, 17:20 UTCJul 26, 18:00 UTC40m
2026-07-26 SWA143 LAS → SAN Jul 26, 13:35 UTCJul 26, 16:05 UTC2h 30m
2026-07-26 SWA3435 BNA → IAH Jul 26, 10:30 UTCJul 26, 12:10 UTC1h 40m
2026-07-26 SWA3435 BNA → IAH Jul 26, 10:27 UTCJul 26, 12:11 UTC1h 45m
2026-07-26 SWA2690 PHL → BNA Jul 26, 01:30 UTCJul 26, 02:55 UTC1h 25m
2026-07-25 SWA692 PHX → BUR Jul 25, 20:45 UTCJul 25, 23:05 UTC2h 20m
2026-07-25 SWA3191 BWI → CVG Jul 25, 17:15 UTCJul 25, 19:40 UTC2h 25m
2026-07-25 SWA3191 BWI → CVG Jul 25, 17:14 UTCJul 25, 19:38 UTC2h 24m
2026-07-25 SWA393 SNA → DEN Jul 25, 15:15 UTCJul 25, 16:10 UTC55m
2026-07-25 SWA393 SNA → DEN Jul 25, 15:10 UTCJul 25, 16:10 UTC1h 0m
2026-07-25 SWA4433 MDW → OMA Jul 25, 12:45 UTCJul 25, 14:05 UTC1h 20m
2026-07-25 SWA4657 LGA → HOU Jul 25, 09:35 UTCJul 25, 10:50 UTC1h 15m
2026-07-25 SWA4250 SEA → BWI Jul 25, 00:20 UTCJul 25, 02:00 UTC1h 40m
2026-07-24 SWA3584 BDL → TPA Jul 24, 20:35 UTCJul 24, 22:55 UTC2h 20m
2026-07-24 SWA416 BUR → SJC Jul 24, 17:30 UTCJul 24, 19:20 UTC1h 50m
2026-07-24 SWA1766 OAK → SLC Jul 24, 14:45 UTCJul 24, 16:25 UTC1h 40m
2026-07-24 SWA1766 OAK → SLC Jul 24, 14:44 UTCJul 24, 16:24 UTC1h 40m
2026-07-24 SWA1787 MDW → BOS Jul 24, 12:00 UTCJul 24, 13:30 UTC1h 30m
2026-07-24 SWA4379 SAN → PHX Jul 24, 00:20 UTCJul 24, 02:45 UTC2h 25m
2026-07-24 SWA4379 SAN → PHX Jul 24, 00:15 UTCJul 24, 02:44 UTC2h 29m
2026-07-23 SWA4450 SEA → SMF Jul 23, 20:35 UTCJul 23, 23:15 UTC2h 40m
2026-07-23 SWA4450 SEA → SMF Jul 23, 18:45 UTCJul 23, 19:25 UTC40m
2026-07-23 SWA4033 LAS → DEN Jul 23, 15:15 UTCJul 23, 17:30 UTC2h 15m
2026-07-23 SWA4033 LAS → DEN Jul 23, 15:11 UTCJul 23, 17:31 UTC2h 21m
2026-07-23 SWA3730 - Jul 23, 11:30 UTCJul 23, 14:00 UTC2h 30m
2026-07-23 SWA409 - Jul 23, 03:00 UTCJul 23, 03:10 UTC10m
2026-07-23 SWA409 - Jul 23, 00:30 UTCJul 23, 01:05 UTC35m
2026-07-23 SWA409 AUS → STL Jul 23, 00:27 UTCJul 23, 03:08 UTC2h 41m
2026-07-22 SWA1441 OAK → LAX Jul 22, 21:15 UTCJul 22, 23:00 UTC1h 45m
2026-07-22 SWA1441 OAK → LAX Jul 22, 21:11 UTCJul 22, 22:56 UTC1h 45m
2026-07-22 SWA2761 MKE → MCO Jul 22, 18:20 UTCJul 22, 19:40 UTC1h 20m
2026-07-22 SWA2761 MKE → MCO Jul 22, 18:18 UTCJul 22, 19:34 UTC1h 16m
2026-07-22 SWA2761 MKE → MCO Jul 22, 13:10 UTCJul 22, 16:50 UTC3h 40m
2026-07-22 SWA3082 MDW → PHL Jul 22, 03:05 UTCJul 22, 03:55 UTC50m
2026-07-22 SWA3082 MDW → PHL Jul 22, 03:03 UTCJul 22, 03:55 UTC52m
2026-07-22 SWA189 MDW → CVG Jul 22, 00:40 UTCJul 22, 02:30 UTC1h 50m
2026-07-21 SWA887 BWI → DEN Jul 21, 19:50 UTCJul 21, 23:30 UTC3h 40m
2026-07-21 SWA3876 MCI → LGA Jul 21, 11:40 UTCJul 21, 13:45 UTC2h 5m
2026-07-21 SWA4383 OAK → ONT Jul 21, 01:00 UTCJul 21, 03:05 UTC2h 5m
2026-07-21 SWA4383 OAK → ONT Jul 21, 00:57 UTCJul 21, 02:55 UTC1h 58m
2026-07-20 SWA3049 DEN → ORD Jul 20, 23:30 UTCJul 21, 00:05 UTC34m
2026-07-20 SWA3049 DEN → ORD Jul 20, 20:10 UTCJul 20, 22:00 UTC1h 50m
2026-07-20 SWA2818 SJC → DEN Jul 20, 16:25 UTCJul 20, 18:40 UTC2h 15m
2026-07-20 SWA1444 OAK → LAS Jul 20, 13:40 UTCJul 20, 15:10 UTC1h 30m
2026-07-20 SWA4976 - Jul 20, 11:10 UTCJul 20, 12:30 UTC1h 20m
2026-07-20 SWA3200 DCA → BNA Jul 20, 04:00 UTCJul 20, 07:20 UTC3h 20m
2026-07-20 SWA4127 BWI → ORF Jul 20, 00:55 UTCJul 20, 02:35 UTC1h 40m
2026-07-19 SWA4127 BWI → ORF Jul 19, 23:05 UTCJul 19, 23:50 UTC45m
2026-07-19 SWA2320 ATL → DAL Jul 19, 19:55 UTCJul 19, 21:45 UTC1h 50m

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 N8576Z page for operator, model, and routing details .

Mode-S ABC49B frequently asked

What is Mode-S code ABC49B?
ABC49B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8576Z.
Where is Mode-S ABC49B registered?
Mode-S code ABC49B 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 ABC49B broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABC49B, octal 52742233, decimal 11,256,987.
What flights does ABC49B operate?
Mode-S ABC49B has broadcast 20 distinct callsigns, including SWA4044, SWA3919, SWA3616, SWA882, SWA46.