Apparatus

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sensors Mode-S transponder

A15B2F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N187FE · BOEING 767-300 · operated by FEDERAL EXPRESS CORP

Hex
A15B2F
Octal
50255457
Decimal
10,574,639
Country
US
Tail
N187FE
Type
B763
No current signal · last broadcast 2d ago
Flights observed
176
Distinct callsigns
20
Country
US
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S A15B2F.

Country allocation

The ICAO 24-bit address A15B2F 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
FDX1874 FedEx Express 7 2026-06-09
FDX1290 FedEx Express 5 2026-06-10
FDX1188 FedEx Express 4 2026-04-17
FDX794 - 3 2026-06-30
FDX1804 FedEx Express 3 2026-05-22
FDX1440 - 3 2026-06-24
FDX1439 FedEx Express 3 2026-05-07
FDX1437 - 3 2026-06-25
FDX1411 - 3 2026-06-18
FDX131 FedEx Express 3 2026-06-12
FDX130 FedEx Express 3 2026-06-11
FDX1240 - 3 2026-06-25
FDX945 FedEx Express 2 2026-05-21
FDX9130 - 2 2026-07-12
FDX830 - 2 2026-07-09
FDX612 FedEx Express 2 2026-05-21
FDX57 FedEx Express 2 2026-04-16
FDX3824 FedEx Express 2 2026-06-04
FDX379 FedEx Express 2 2026-04-16
FDX3747 FedEx Express 2 2026-06-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-12 FDX9130 - Jul 12, 02:35 UTCJul 12, 05:10 UTC2h 35m
2026-07-12 FDX9130 MEM → MEX Jul 12, 02:32 UTCJul 12, 05:10 UTC2h 38m
2026-07-09 FDX830 - Jul 9, 12:15 UTCJul 9, 13:35 UTC1h 20m
2026-07-09 FDX830 - Jul 9, 12:05 UTCJul 9, 12:10 UTC5m
2026-07-09 FDX1458 - Jul 9, 09:20 UTCJul 9, 10:50 UTC1h 30m
2026-07-09 FDX1292 - Jul 9, 03:00 UTCJul 9, 05:15 UTC2h 15m
2026-07-08 FDX764 - Jul 8, 20:50 UTCJul 8, 23:00 UTC2h 10m
2026-07-08 FDX476 - Jul 8, 14:45 UTCJul 8, 16:05 UTC1h 20m
2026-07-08 FDX1738 IND → RDU Jul 8, 08:40 UTCJul 8, 09:50 UTC1h 10m
2026-07-08 FDX1650 - Jul 8, 02:20 UTCJul 8, 05:55 UTC3h 35m
2026-07-07 FDX1728 - Jul 7, 12:45 UTCJul 7, 14:35 UTC1h 50m
2026-07-07 FDX1728 - Jul 7, 09:15 UTCJul 7, 11:10 UTC1h 55m
2026-07-07 FDX1635 - Jul 7, 03:00 UTCJul 7, 04:10 UTC1h 10m
2026-07-03 FDX1492 MEM → CLT Jul 3, 09:05 UTCJul 3, 10:15 UTC1h 10m
2026-07-03 FDX1358 - Jul 3, 02:25 UTCJul 3, 04:10 UTC1h 45m
2026-07-02 FDX1407 MEM → MSP Jul 2, 09:25 UTCJul 2, 11:00 UTC1h 35m
2026-07-02 FDX1230 - Jul 2, 02:00 UTCJul 2, 04:40 UTC2h 40m
2026-07-01 FDX1430 - Jul 1, 09:00 UTCJul 1, 11:45 UTC2h 45m
2026-07-01 FDX1430 MEM → SLC Jul 1, 08:55 UTCJul 1, 11:38 UTC2h 43m
2026-07-01 FDX1224 - Jul 1, 02:35 UTCJul 1, 04:05 UTC1h 30m
2026-06-30 FDX794 - Jun 30, 21:30 UTCJun 30, 23:00 UTC1h 30m
2026-06-30 FDX794 MEM → RIC Jun 30, 21:28 UTCJun 30, 23:00 UTC1h 32m
2026-06-30 FDX1312 - Jun 30, 03:15 UTCJun 30, 04:50 UTC1h 35m
2026-06-26 FDX1416 - Jun 26, 09:00 UTCJun 26, 10:25 UTC1h 25m
2026-06-26 FDX1238 - Jun 26, 03:20 UTCJun 26, 04:39 UTC1h 20m
2026-06-25 FDX1437 - Jun 25, 09:10 UTCJun 25, 10:30 UTC1h 20m
2026-06-25 FDX1437 MEM → MKE Jun 25, 09:05 UTCJun 25, 10:27 UTC1h 22m
2026-06-25 FDX1240 - Jun 25, 02:30 UTCJun 25, 05:15 UTC2h 45m
2026-06-24 FDX1440 - Jun 24, 09:29 UTCJun 24, 12:34 UTC3h 5m
2026-06-24 FDX1248 - Jun 24, 01:55 UTCJun 24, 03:15 UTC1h 20m
2026-06-23 FDX1580 - Jun 23, 09:24 UTCJun 23, 10:29 UTC1h 5m
2026-06-23 FDX1580 MEM → GSO Jun 23, 09:19 UTCJun 23, 10:30 UTC1h 11m
2026-06-23 FDX1240 - Jun 23, 02:24 UTCJun 23, 05:00 UTC2h 35m
2026-06-20 FDX1440 - Jun 20, 09:44 UTCJun 20, 12:45 UTC3h 0m
2026-06-20 FDX2200 FLL → MEM Jun 20, 02:54 UTCJun 20, 04:39 UTC1h 45m
2026-06-19 FDX1444 - Jun 19, 07:54 UTCJun 19, 09:49 UTC1h 55m
2026-06-19 FDX1444 MEM → FLL Jun 19, 07:52 UTCJun 19, 09:46 UTC1h 54m
2026-06-19 FDX1378 - Jun 19, 01:59 UTCJun 19, 02:59 UTC1h 0m
2026-06-18 FDX1411 - Jun 18, 11:40 UTCJun 18, 12:25 UTC45m
2026-06-18 FDX1411 IAH → AFW Jun 18, 11:40 UTCJun 18, 12:25 UTC45m
2026-06-18 FDX1411 - Jun 18, 09:30 UTCJun 18, 10:30 UTC1h 0m
2026-06-18 FDX1359 - Jun 18, 02:25 UTCJun 18, 05:30 UTC3h 5m
2026-06-18 FDX1359 - Jun 18, 00:25 UTCJun 18, 01:05 UTC40m
2026-06-17 FDX1573 - Jun 17, 13:25 UTCJun 17, 13:50 UTC25m
2026-06-17 FDX1573 - Jun 17, 08:45 UTCJun 17, 11:45 UTC3h 0m
2026-06-17 FDX1213 - Jun 17, 02:00 UTCJun 17, 05:20 UTC3h 20m
2026-06-16 FDX1417 - Jun 16, 08:15 UTCJun 16, 11:40 UTC3h 25m
2026-06-16 FDX1417 MEM → BUR Jun 16, 08:10 UTCJun 16, 11:36 UTC3h 26m
2026-06-16 FDX1201 - Jun 16, 02:29 UTCJun 16, 03:30 UTC1h 0m
2026-06-12 FDX1401 MEM → DFW Jun 12, 09:55 UTCJun 12, 11:10 UTC1h 15m

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 N187FE page for operator, model, and routing details .

Mode-S A15B2F frequently asked

What is Mode-S code A15B2F?
A15B2F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N187FE.
Where is Mode-S A15B2F registered?
Mode-S code A15B2F 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 A15B2F broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A15B2F, octal 50255457, decimal 10,574,639.
What flights does A15B2F operate?
Mode-S A15B2F has broadcast 20 distinct callsigns, including FDX1874, FDX1290, FDX1188, FDX794, FDX1804.