Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A448FA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N37518 · BOEING 737 MAX 9 · operated by WILMINGTON TRUST CO TRUSTEE

Hex
A448FA
Octal
51044372
Decimal
10,766,586
Country
US
Tail
N37518
Type
B39M
No current signal · last broadcast Jul 26, 15:15 UTC
Flights observed
471
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 15:15 UTC

Last known position

Most recent position reported by Mode-S A448FA.

Country allocation

The ICAO 24-bit address A448FA 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
UAL796 United Airlines 7 2026-06-06
UAL1664 United Airlines 6 2026-05-28
UAL360 - 5 2026-06-13
UAL2623 United Airlines 5 2026-06-06
UAL2356 - 5 2026-07-12
UAL2086 United Airlines 5 2026-07-23
UAL1661 United Airlines 5 2026-05-28
UAL8270 United Airlines 4 2026-04-21
UAL609 - 4 2026-07-18
UAL356 United Airlines 4 2026-07-18
UAL2620 - 4 2026-07-18
UAL1948 United Airlines 4 2026-04-16
UAL1819 United Airlines 4 2026-05-30
UAL1784 United Airlines 4 2026-06-03
UAL1734 - 4 2026-07-23
UAL1397 - 4 2026-07-07
UAL1249 United Airlines 4 2026-06-22
UAL8106 United Airlines 3 2026-06-06
UAL491 - 3 2026-07-04
UAL413 United Airlines 3 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL3878 PNS → EWR Jul 26, 12:55 UTCJul 26, 15:15 UTC2h 20m
2026-07-25 UAL1400 SMF → ORD Jul 25, 22:35 UTCJul 25, 23:25 UTC50m
2026-07-25 UAL1400 SMF → ORD Jul 25, 20:45 UTCJul 25, 22:30 UTC1h 45m
2026-07-25 UAL2287 ORD → SAN Jul 25, 16:30 UTCJul 25, 18:45 UTC2h 15m
2026-07-24 UAL1667 CUN → ORD Jul 24, 21:20 UTCJul 25, 00:30 UTC3h 10m
2026-07-24 UAL1667 CUN → ORD Jul 24, 21:19 UTCJul 25, 00:21 UTC3h 2m
2026-07-24 UAL1659 JAX → EWR Jul 24, 16:30 UTCJul 24, 19:30 UTC3h 0m
2026-07-24 UAL752 LAX → IAH Jul 24, 11:20 UTCJul 24, 13:55 UTC2h 35m
2026-07-24 UAL1956 JAX → EWR Jul 24, 00:30 UTCJul 24, 02:40 UTC2h 10m
2026-07-23 UAL2086 EWR → ATL Jul 23, 19:10 UTCJul 23, 22:10 UTC3h 0m
2026-07-23 UAL1734 - Jul 23, 12:35 UTCJul 23, 17:15 UTC4h 40m
2026-07-22 UAL413 MCO → EWR Jul 22, 21:30 UTCJul 22, 23:10 UTC1h 40m
2026-07-22 UAL2071 SNA → EWR Jul 22, 14:20 UTCJul 22, 19:20 UTC5h 0m
2026-07-22 UAL367 DEN → BOI Jul 22, 03:40 UTCJul 22, 05:25 UTC1h 45m
2026-07-21 UAL2647 DCA → IAH Jul 21, 15:30 UTCJul 21, 20:55 UTC5h 25m
2026-07-21 UAL2400 BOS → SFO Jul 21, 01:15 UTCJul 21, 06:05 UTC4h 50m
2026-07-21 UAL2400 BOS → SFO Jul 21, 00:25 UTCJul 21, 01:10 UTC45m
2026-07-20 UAL2647 DCA → IAH Jul 20, 15:30 UTCJul 20, 20:55 UTC5h 25m
2026-07-20 UAL1976 BOS → IAH Jul 20, 00:55 UTCJul 20, 04:25 UTC3h 30m
2026-07-19 UAL1387 - Jul 19, 19:45 UTCJul 19, 23:15 UTC3h 30m
2026-07-19 UAL1668 AUS → SFO Jul 19, 14:28 UTCJul 19, 17:28 UTC3h 0m
2026-07-19 UAL1668 AUS → SFO Jul 19, 14:25 UTCJul 19, 17:35 UTC3h 10m
2026-07-19 UAL1807 - Jul 19, 07:35 UTCJul 19, 10:40 UTC3h 5m
2026-07-19 UAL1807 SFO → AUS Jul 19, 07:31 UTCJul 19, 10:39 UTC3h 8m
2026-07-18 UAL2620 MCO → SFO Jul 18, 23:30 UTCJul 19, 04:35 UTC5h 5m
2026-07-18 UAL609 ORD → MCO Jul 18, 19:54 UTCJul 18, 22:01 UTC2h 7m
2026-07-18 UAL609 ORD → MCO Jul 18, 19:50 UTCJul 18, 22:05 UTC2h 15m
2026-07-18 UAL356 DEN → TPA Jul 18, 14:50 UTCJul 18, 18:25 UTC3h 35m
2026-07-18 UAL602T ORD → PHX Jul 18, 02:55 UTCJul 18, 05:45 UTC2h 50m
2026-07-17 UAL308 - Jul 17, 22:40 UTCJul 18, 00:29 UTC1h 50m
2026-07-17 UAL2182 - Jul 17, 17:30 UTCJul 17, 19:00 UTC1h 30m
2026-07-17 UAL2182 - Jul 17, 12:45 UTCJul 17, 14:50 UTC2h 5m
2026-07-17 UAL2305 - Jul 17, 00:40 UTCJul 17, 04:04 UTC3h 25m
2026-07-16 UAL1754 MFR → SFO Jul 16, 22:00 UTCJul 16, 23:05 UTC1h 5m
2026-07-16 UAL337 DEN → MFR Jul 16, 17:40 UTCJul 16, 19:45 UTC2h 5m
2026-07-16 UAL2052 - Jul 16, 12:00 UTCJul 16, 14:29 UTC2h 30m
2026-07-16 UAL2052 BDL → DEN Jul 16, 11:59 UTCJul 16, 15:39 UTC3h 40m
2026-07-16 UAL2254 - Jul 16, 00:50 UTCJul 16, 04:05 UTC3h 15m
2026-07-15 UAL1417 - Jul 15, 19:50 UTCJul 15, 23:20 UTC3h 30m
2026-07-15 UAL2234 - Jul 15, 15:40 UTCJul 15, 17:45 UTC2h 5m
2026-07-15 UAL320 - Jul 15, 11:10 UTCJul 15, 13:00 UTC1h 50m
2026-07-15 UAL8219 SFO → DEN Jul 15, 04:00 UTCJul 15, 06:05 UTC2h 5m
2026-07-14 UAL2251 - Jul 14, 21:15 UTCJul 15, 01:15 UTC3h 59m
2026-07-14 UAL2825 - Jul 14, 16:30 UTCJul 14, 18:20 UTC1h 50m
2026-07-14 UAL2034 - Jul 14, 12:50 UTCJul 14, 14:25 UTC1h 35m
2026-07-13 UAL2336 PDX → ORD Jul 13, 21:35 UTCJul 14, 01:10 UTC3h 35m
2026-07-13 UAL644T DEN → PDX Jul 13, 18:00 UTCJul 13, 20:05 UTC2h 5m
2026-07-13 UAL644T DEN → PDX Jul 13, 17:49 UTCJul 13, 20:02 UTC2h 13m
2026-07-13 UAL2360 - Jul 13, 14:05 UTCJul 13, 15:50 UTC1h 45m
2026-07-13 UAL1894 - Jul 13, 00:20 UTCJul 13, 02:05 UTC1h 45m

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 N37518 page for operator, model, and routing details .

Mode-S A448FA frequently asked

What is Mode-S code A448FA?
A448FA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N37518.
Where is Mode-S A448FA registered?
Mode-S code A448FA 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 A448FA broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 15:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A448FA, octal 51044372, decimal 10,766,586.
What flights does A448FA operate?
Mode-S A448FA has broadcast 20 distinct callsigns, including UAL796, UAL1664, UAL360, UAL2623, UAL2356.