Apparatus

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sensors Mode-S transponder

AC370B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8864H · BOEING 737 MAX 8 · operated by SOUTHWEST AIRLINES CO

Hex
AC370B
Octal
53033413
Decimal
11,286,283
Country
US
Tail
N8864H
Type
B38M
No current signal · last broadcast Jul 26, 21:20 UTC
Flights observed
757
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:20 UTC

Last known position

Most recent position reported by Mode-S AC370B.

Country allocation

The ICAO 24-bit address AC370B 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
SWA2863 - 6 2026-06-26
SWA1166 Southwest Airlines 5 2026-07-26
SWA3895 Southwest Airlines 4 2026-04-17
SWA3839 - 4 2026-04-13
SWA3794 - 4 2026-04-13
SWA3584 Southwest Airlines 4 2026-05-13
SWA3194 Southwest Airlines 4 2026-07-22
SWA2816 Southwest Airlines 4 2026-06-06
SWA2665 Southwest Airlines 4 2026-07-01
SWA2587 - 4 2026-07-11
SWA2367 Southwest Airlines 4 2026-07-18
SWA2125 Southwest Airlines 4 2026-04-18
SWA1370 - 4 2026-06-23
SWA5046 - 3 2026-07-09
SWA486 Southwest Airlines 3 2026-07-20
SWA45 - 3 2026-06-19
SWA4159 Southwest Airlines 3 2026-05-18
SWA4111 Southwest Airlines 3 2026-06-13
SWA4003 - 3 2026-07-09
SWA3810 Southwest Airlines 3 2026-06-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA1166 MCI → LGA Jul 26, 19:55 UTCJul 26, 21:15 UTC1h 20m
2026-07-26 SWA3499 PHX → SFO Jul 26, 11:40 UTCJul 26, 16:30 UTC4h 50m
2026-07-26 SWA3499 PHX → SFO Jul 26, 11:38 UTCJul 26, 16:26 UTC4h 48m
2026-07-25 SWA1235 BWI → MHT Jul 25, 23:20 UTCJul 26, 00:10 UTC50m
2026-07-25 SWA1154 PIT → DEN Jul 25, 16:25 UTCJul 25, 18:05 UTC1h 40m
2026-07-25 SWA1154 PIT → DEN Jul 25, 16:21 UTCJul 25, 19:53 UTC3h 32m
2026-07-25 SWA4708 MDW → ATL Jul 25, 12:55 UTCJul 25, 14:45 UTC1h 50m
2026-07-25 SWA370 PHX → BUR Jul 25, 09:30 UTCJul 25, 11:40 UTC2h 10m
2026-07-25 SWA2250 OAK → LAS Jul 25, 02:00 UTCJul 25, 03:40 UTC1h 40m
2026-07-24 SWA5071 MCO → MSY Jul 24, 23:40 UTCJul 25, 01:05 UTC1h 25m
2026-07-24 SWA5069 CMH → ATL Jul 24, 21:25 UTCJul 24, 22:35 UTC1h 10m
2026-07-24 SWA5069 CMH → ATL Jul 24, 21:22 UTCJul 24, 22:30 UTC1h 8m
2026-07-24 SWA5063 BNA → BWI Jul 24, 18:55 UTCJul 24, 20:10 UTC1h 15m
2026-07-24 SWA5063 BNA → BWI Jul 24, 18:53 UTCJul 24, 20:15 UTC1h 22m
2026-07-24 SWA4599 PHL → MDW Jul 24, 15:50 UTCJul 24, 17:40 UTC1h 50m
2026-07-24 SWA1041 ORF → BNA Jul 24, 12:30 UTCJul 24, 14:30 UTC2h 0m
2026-07-24 SWA756 DAL → LGA Jul 24, 10:20 UTCJul 24, 11:10 UTC50m
2026-07-24 SWA4577 SJC → OGG Jul 24, 03:20 UTCJul 24, 04:05 UTC45m
2026-07-24 SWA4281 MCI → VPS Jul 24, 00:35 UTCJul 24, 01:50 UTC1h 15m
2026-07-23 SWA4733 MCO → DCA Jul 23, 22:25 UTCJul 23, 23:35 UTC1h 10m
2026-07-23 SWA725 LAX → AUS Jul 23, 19:00 UTCJul 23, 21:10 UTC2h 10m
2026-07-23 SWA725 LAX → AUS Jul 23, 18:45 UTCJul 23, 18:55 UTC10m
2026-07-23 SWA3891 PHX → MSP Jul 23, 15:05 UTCJul 23, 16:45 UTC1h 40m
2026-07-23 SWA3891 PHX → MSP Jul 23, 15:04 UTCJul 23, 17:10 UTC2h 6m
2026-07-23 SWA3020 STL → BOS Jul 23, 12:35 UTCJul 23, 14:00 UTC1h 25m
2026-07-23 SWA3020 STL → BOS Jul 23, 12:31 UTCJul 23, 13:58 UTC1h 27m
2026-07-23 SWA4942 HOU → SMF Jul 23, 10:25 UTCJul 23, 11:30 UTC1h 5m
2026-07-23 SWA4169 LAX → OAK Jul 23, 04:00 UTCJul 23, 04:25 UTC25m
2026-07-22 SWA1544 KOA → OAK Jul 22, 21:40 UTCJul 22, 23:35 UTC1h 55m
2026-07-22 SWA930 HOU → SAT Jul 22, 18:55 UTCJul 22, 20:30 UTC1h 35m
2026-07-22 SWA930 HOU → SAT Jul 22, 15:15 UTCJul 22, 17:55 UTC2h 40m
2026-07-22 SWA3194 PBI → ATL Jul 22, 04:35 UTCJul 22, 05:25 UTC50m
2026-07-22 SWA536 PHX → PDX Jul 22, 01:15 UTCJul 22, 03:20 UTC2h 5m
2026-07-21 SWA2313 LAS → PHX Jul 21, 23:15 UTCJul 22, 00:00 UTC45m
2026-07-21 SWA140 ALB → MDW Jul 21, 20:57 UTCJul 21, 22:12 UTC1h 15m
2026-07-21 SWA140 ALB → MDW Jul 21, 21:00 UTCJul 21, 22:15 UTC1h 15m
2026-07-21 SWA236 STL → HOU Jul 21, 14:40 UTCJul 21, 19:40 UTC5h 0m
2026-07-21 SWA2827 - Jul 21, 10:50 UTCJul 21, 13:05 UTC2h 15m
2026-07-21 SWA235 JAX → BWI Jul 21, 00:55 UTCJul 21, 03:05 UTC2h 10m
2026-07-20 SWA235 JAX → BWI Jul 20, 19:40 UTCJul 20, 23:45 UTC4h 5m
2026-07-20 SWA486 MDW → LGA Jul 20, 16:10 UTCJul 20, 18:20 UTC2h 10m
2026-07-20 SWA486 MDW → LGA Jul 20, 16:07 UTCJul 20, 18:15 UTC2h 8m
2026-07-20 SWA486 MDW → LGA Jul 20, 13:20 UTCJul 20, 14:45 UTC1h 25m
2026-07-20 SWA1935 SMF → ONT Jul 20, 10:40 UTCJul 20, 11:50 UTC1h 10m
2026-07-20 SWA320 SJC → SNA Jul 20, 02:20 UTCJul 20, 04:05 UTC1h 45m
2026-07-19 SWA3777 PHX → DAL Jul 19, 23:20 UTCJul 20, 01:10 UTC1h 50m
2026-07-19 SWA2204 LAS → BWI Jul 19, 15:55 UTCJul 19, 20:15 UTC4h 20m
2026-07-19 SWA2204 LAS → BWI Jul 19, 15:51 UTCJul 19, 20:13 UTC4h 22m
2026-07-19 SWA3975 STL → LGA Jul 19, 12:05 UTCJul 19, 13:43 UTC1h 39m
2026-07-19 SWA3975 STL → LGA Jul 19, 03:15 UTCJul 19, 13:45 UTC10h 30m

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 N8864H page for operator, model, and routing details .

Mode-S AC370B frequently asked

What is Mode-S code AC370B?
AC370B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8864H.
Where is Mode-S AC370B registered?
Mode-S code AC370B 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 AC370B broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC370B, octal 53033413, decimal 11,286,283.
What flights does AC370B operate?
Mode-S AC370B has broadcast 20 distinct callsigns, including SWA2863, SWA1166, SWA3895, SWA3839, SWA3794.