sensors Mode-S transponder

AC7218

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N9004H · operated by SOUTHWEST AIRLINES CO.

Hex
AC7218
Octal
53071030
Decimal
11,301,400
Country
US
Tail
N9004H
Broadcasting now · callsign SWA3658 · 37,900 ft
Flights observed
366
Distinct callsigns
20
Country
US
Last broadcast
4m ago

Current position

AC7218 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AC7218 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
SWA2189 Southwest Airlines 8 2026-07-04
SWA193 - 5 2026-06-27
SWA488 - 4 2026-07-02
SWA2968 - 4 2026-06-24
SWA1593 - 4 2026-07-01
SWA4874 Southwest Airlines 3 2026-06-24
SWA3137 Southwest Airlines 3 2026-05-25
SWA2220 Southwest Airlines 3 2026-05-25
SWA2147 - 3 2026-06-21
SWA2072 - 3 2026-07-03
SWA1271 Southwest Airlines 3 2026-06-07
SWA1039 - 3 2026-07-07
BOE123 - 3 2026-04-30
SWA998 - 2 2026-06-29
SWA932 Southwest Airlines 2 2026-06-08
SWA8509 Southwest Airlines 2 2026-06-01
SWA8505 Southwest Airlines 2 2026-06-01
SWA738 Southwest Airlines 2 2026-06-24
SWA734 - 2 2026-07-07
SWA540 - 2 2026-07-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-09 SWA3658 - Jul 9, 10:30 UTCJul 9, 12:00 UTC1h 30m
2026-07-09 SWA4690 BNA → MSP Jul 9, 03:45 UTCJul 9, 05:20 UTC1h 35m
2026-07-09 SWA4690 BNA → MSP Jul 9, 03:41 UTCJul 9, 05:20 UTC1h 39m
2026-07-08 SWA4600 PHX → BNA Jul 8, 23:05 UTCJul 9, 02:15 UTC3h 10m
2026-07-08 SWA1791 GEG → PHX Jul 8, 19:50 UTCJul 8, 22:05 UTC2h 15m
2026-07-08 SWA322 LAS → GEG Jul 8, 16:45 UTCJul 8, 18:40 UTC1h 55m
2026-07-08 SWA322 AUS → LAS Jul 8, 13:15 UTCJul 8, 15:30 UTC2h 15m
2026-07-08 SWA4363 ATL → AUS Jul 8, 10:20 UTCJul 8, 12:05 UTC1h 45m
2026-07-07 SWA734 - Jul 7, 23:55 UTCJul 8, 01:20 UTC1h 25m
2026-07-07 SWA734 - Jul 7, 19:00 UTCJul 7, 22:25 UTC3h 25m
2026-07-07 SWA4322 - Jul 7, 12:35 UTCJul 7, 17:25 UTC4h 50m
2026-07-07 SWA4322 BWI → LAX Jul 7, 12:32 UTCJul 7, 17:11 UTC4h 40m
2026-07-07 SWA2746 - Jul 7, 03:25 UTCJul 7, 04:50 UTC1h 25m
2026-07-07 SWA1039 - Jul 7, 00:30 UTCJul 7, 02:15 UTC1h 45m
2026-07-07 SWA1039 ORF → MDW Jul 7, 00:29 UTCJul 7, 02:15 UTC1h 46m
2026-07-06 SWA1039 - Jul 6, 22:45 UTCJul 6, 23:20 UTC35m
2026-07-06 SWA204 ATL → BWI Jul 6, 20:05 UTCJul 6, 21:35 UTC1h 30m
2026-07-06 SWA862 - Jul 6, 17:20 UTCJul 6, 18:40 UTC1h 20m
2026-07-06 SWA1281 - Jul 6, 13:00 UTCJul 6, 15:40 UTC2h 40m
2026-07-06 SWA1959 - Jul 6, 10:35 UTCJul 6, 11:25 UTC50m
2026-07-06 SWA4800 - Jul 6, 04:20 UTCJul 6, 05:15 UTC55m
2026-07-06 SWA540 - Jul 6, 01:55 UTCJul 6, 02:55 UTC1h 0m
2026-07-05 SWA540 - Jul 5, 23:55 UTCJul 6, 00:25 UTC30m
2026-07-05 SWA1378 - Jul 5, 19:10 UTCJul 5, 22:40 UTC3h 30m
2026-07-05 SWA3805 SMF → ONT Jul 5, 17:10 UTCJul 5, 18:05 UTC55m
2026-07-05 SWA3805 SMF → ONT Jul 5, 17:06 UTCJul 5, 18:05 UTC59m
2026-07-05 SWA1738 DEN → SMF Jul 5, 14:05 UTCJul 5, 16:05 UTC2h 0m
2026-07-05 SWA2942 - Jul 5, 10:30 UTCJul 5, 12:30 UTC2h 0m
2026-07-05 SWA1311 - Jul 5, 00:10 UTCJul 5, 03:05 UTC2h 55m
2026-07-04 SWA3384 - Jul 4, 22:15 UTCJul 4, 23:10 UTC55m
2026-07-04 SWA3384 SAN → PHX Jul 4, 22:13 UTCJul 4, 23:07 UTC55m
2026-07-04 SWA1 LAS → SAN Jul 4, 20:28 UTCJul 4, 21:20 UTC53m
2026-07-04 SWA2189 PSP → OAK Jul 4, 17:45 UTCJul 4, 19:10 UTC1h 25m
2026-07-04 SWA1063 - Jul 4, 14:30 UTCJul 4, 16:15 UTC1h 45m
2026-07-04 SWA358 - Jul 4, 11:05 UTCJul 4, 13:15 UTC2h 10m
2026-07-04 SWA2627 SNA → SLC Jul 4, 02:40 UTCJul 4, 04:25 UTC1h 45m
2026-07-03 SWA2877 ROC → MCO Jul 3, 23:10 UTCJul 4, 01:25 UTC2h 15m
2026-07-03 SWA2877 - Jul 3, 20:50 UTCJul 3, 22:05 UTC1h 15m
2026-07-03 SWA3513 - Jul 3, 14:00 UTCJul 3, 17:25 UTC3h 25m
2026-07-03 SWA2072 - Jul 3, 02:50 UTCJul 3, 05:40 UTC2h 50m
2026-07-03 SWA2072 HOU → SAN Jul 3, 02:45 UTCJul 3, 05:35 UTC2h 51m
2026-07-03 SWA2526 - Jul 3, 00:40 UTCJul 3, 01:25 UTC45m
2026-07-02 SWA488 - Jul 2, 22:35 UTCJul 2, 23:05 UTC30m
2026-07-02 SWA488 DAL → MAF Jul 2, 22:31 UTCJul 2, 23:19 UTC48m
2026-07-02 SWA4819 HOU → DEN Jul 2, 18:50 UTCJul 2, 21:25 UTC2h 35m
2026-07-02 SWA4785 MCO → BDL Jul 2, 14:30 UTCJul 2, 16:45 UTC2h 15m
2026-07-02 SWA3876 MCI → LGA Jul 2, 11:00 UTCJul 2, 13:10 UTC2h 10m
2026-07-02 SWA3876 MCI → LGA Jul 2, 10:57 UTCJul 2, 12:56 UTC1h 59m
2026-07-02 SWA2721 MCO → SRQ Jul 2, 01:05 UTCJul 2, 01:30 UTC25m
2026-07-02 SWA2721 MCO → SRQ Jul 2, 01:03 UTCJul 2, 01:28 UTC25m

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 N9004H page for operator, model, and routing details .

Mode-S AC7218 frequently asked

What is Mode-S code AC7218?
AC7218 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N9004H.
Where is Mode-S AC7218 registered?
Mode-S code AC7218 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 AC7218 broadcasting right now?
Yes. Mode-S AC7218 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC7218, octal 53071030, decimal 11,301,400.
What flights does AC7218 operate?
Mode-S AC7218 has broadcast 20 distinct callsigns, including SWA2189, SWA193, SWA488, SWA2968, SWA1593.