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 1d ago
Flights observed
101
Distinct callsigns
20
Country
US
Last broadcast
1d 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
FDX1188 FedEx Express 4 2026-04-17
FDX1804 FedEx Express 3 2026-05-22
FDX1439 FedEx Express 3 2026-05-07
FDX1290 FedEx Express 3 2026-04-15
FDX945 FedEx Express 2 2026-05-21
FDX612 FedEx Express 2 2026-05-21
FDX57 FedEx Express 2 2026-04-16
FDX379 FedEx Express 2 2026-04-16
FDX3629 FedEx Express 2 2026-04-18
FDX258 FedEx Express 2 2026-04-16
FDX1874 FedEx Express 2 2026-04-14
FDX1732 FedEx Express 2 2026-05-28
FDX1717 FedEx Express 2 2026-05-06
FDX1629 FedEx Express 2 2026-05-06
FDX150 FedEx Express 2 2026-05-19
FDX131 FedEx Express 2 2026-04-16
FDX130 FedEx Express 2 2026-04-15
FDX1299 FedEx Express 2 2026-05-29
FDX1251 FedEx Express 2 2026-04-28
FDX916 FedEx Express 1 2026-05-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 FDX1437 MEM → MKE May 29, 09:30 UTCMay 29, 10:40 UTC1h 10m
2026-05-29 FDX1299 IAH → MEM May 29, 03:20 UTCMay 29, 04:40 UTC1h 20m
2026-05-29 FDX1299 IAH → MEM May 29, 03:19 UTCMay 29, 04:37 UTC1h 18m
2026-05-28 FDX1732 IND → IAH May 28, 08:10 UTCMay 28, 09:55 UTC1h 45m
2026-05-28 FDX1732 IND → IAH May 28, 08:08 UTCMay 28, 09:55 UTC1h 47m
2026-05-28 FDX1650 LAX → IND May 28, 02:35 UTCMay 28, 06:00 UTC3h 25m
2026-05-27 FDX1750 IND → LAX May 27, 08:15 UTCMay 27, 12:00 UTC3h 45m
2026-05-27 FDX1602 ATL → IND May 27, 03:09 UTCMay 27, 03:45 UTC35m
2026-05-23 FDX1405 MEM → ORD May 23, 08:55 UTCMay 23, 10:00 UTC1h 5m
2026-05-23 FDX147 YYZ → MEM May 23, 02:00 UTCMay 23, 03:55 UTC1h 55m
2026-05-22 FDX208 MEM → YYZ May 22, 20:40 UTCMay 22, 22:15 UTC1h 35m
2026-05-22 FDX855 LAX → MEM May 22, 12:55 UTCMay 22, 16:15 UTC3h 20m
2026-05-22 FDX1876 OAK → LAX May 22, 09:10 UTCMay 22, 09:55 UTC45m
2026-05-22 FDX1804 SLC → OAK May 22, 05:15 UTCMay 22, 05:45 UTC30m
2026-05-22 FDX1804 SLC → OAK May 22, 05:11 UTCMay 22, 05:52 UTC41m
2026-05-22 FDX1804 SLC → OAK May 22, 03:15 UTCMay 22, 03:45 UTC30m
2026-05-21 FDX945 MEM → SLC May 21, 20:40 UTCMay 21, 23:25 UTC2h 45m
2026-05-21 FDX945 MEM → SLC May 21, 20:35 UTCMay 21, 23:21 UTC2h 46m
2026-05-21 FDX612 ELP → MEM May 21, 14:25 UTCMay 21, 16:10 UTC1h 45m
2026-05-21 FDX612 ELP → MEM May 21, 12:05 UTCMay 21, 13:01 UTC55m
2026-05-21 FDX1410 MEM → TPA May 21, 08:30 UTCMay 21, 09:55 UTC1h 25m
2026-05-21 FDX1262 PHX → MEM May 21, 02:50 UTCMay 21, 05:20 UTC2h 30m
2026-05-20 FDX1748 IND → PHX May 20, 08:25 UTCMay 20, 11:40 UTC3h 15m
2026-05-20 FDX151 YYZ → IND May 20, 02:50 UTCMay 20, 03:55 UTC1h 5m
2026-05-19 FDX150 IND → YYZ May 19, 09:05 UTCMay 19, 09:45 UTC40m
2026-05-19 FDX150 IND → YYZ May 19, 09:00 UTCMay 19, 10:06 UTC1h 6m
2026-05-19 FDX1625 ELP → IND May 19, 02:05 UTCMay 19, 04:35 UTC2h 30m
2026-05-17 FDX916 MEM → ELP May 17, 21:35 UTCMay 17, 23:45 UTC2h 10m
2026-05-16 FDX1240 LAS → MEM May 16, 02:20 UTCMay 16, 05:15 UTC2h 55m
2026-05-15 FDX1440 MEM → LAS May 15, 09:25 UTCMay 15, 12:25 UTC3h 0m
2026-05-15 FDX1346 CLE → MEM May 15, 02:15 UTCMay 15, 03:40 UTC1h 25m
2026-05-14 FDX1552 MEM → CLE May 14, 08:50 UTCMay 14, 10:20 UTC1h 30m
2026-05-14 FDX1219 SJC → MEM May 14, 02:05 UTCMay 14, 05:35 UTC3h 30m
2026-05-13 FDX3724 IND → OAK May 13, 19:30 UTCMay 13, 23:30 UTC4h 0m
2026-05-13 FDX3649 MIA → IND May 13, 12:35 UTCMay 13, 14:55 UTC2h 20m
2026-05-13 FDX1461 MEM → MIA May 13, 08:35 UTCMay 13, 10:20 UTC1h 45m
2026-05-13 FDX1224 RIC → MEM May 13, 02:00 UTCMay 13, 03:40 UTC1h 40m
2026-05-12 FDX794 MEM → RIC May 12, 21:35 UTCMay 12, 23:05 UTC1h 30m
2026-05-12 FDX207 MIA → BOG May 12, 13:35 UTCMay 12, 15:20 UTC1h 45m
2026-05-12 FDX148 MEM → YYZ May 12, 09:05 UTCMay 12, 11:00 UTC1h 55m
2026-05-12 FDX1253 ABE → MEM May 12, 02:45 UTCMay 12, 03:55 UTC1h 10m
2026-05-09 FDX1497 MEM → ABE May 9, 09:20 UTCMay 9, 11:00 UTC1h 40m
2026-05-09 FDX1222 SAN → MEM May 9, 02:20 UTCMay 9, 05:35 UTC3h 15m
2026-05-08 FDX1754 IND → ONT May 8, 08:09 UTCMay 8, 12:00 UTC3h 50m
2026-05-08 FDX1604 PHL → IND May 8, 02:24 UTCMay 8, 03:55 UTC1h 30m
2026-05-07 FDX1439 MEM → PHL May 7, 08:40 UTCMay 7, 10:15 UTC1h 35m
2026-05-07 FDX1439 MEM → PHL May 7, 08:35 UTCMay 7, 10:17 UTC1h 42m
2026-05-07 FDX1369 LAX → MEM May 7, 01:15 UTCMay 7, 04:40 UTC3h 25m
2026-05-06 FDX3884 OAK → SEA May 6, 22:00 UTCMay 6, 23:45 UTC1h 45m
2026-05-06 FDX3824 SEA → OAK May 6, 14:05 UTCMay 6, 15:40 UTC1h 35m

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 1d 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 FDX1188, FDX1804, FDX1439, FDX1290, FDX945.