Apparatus

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sensors Mode-S transponder

A25BB7

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N251FE · operated by FEDERAL EXPRESS CORP

Hex
A25BB7
Octal
50455667
Decimal
10,640,311
Country
US
Tail
N251FE
Type
B763
No current signal · last broadcast 3d ago
Flights observed
192
Distinct callsigns
20
Country
US
Last broadcast
3d ago

Last known position

Most recent position reported by Mode-S A25BB7.

Country allocation

The ICAO 24-bit address A25BB7 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
FDX2210 - 5 2026-07-03
FDX1432 FedEx Express 5 2026-06-06
FDX1227 FedEx Express 5 2026-06-09
FDX1450 FedEx Express 4 2026-05-14
FDX1243 - 4 2026-06-30
FDX762 FedEx Express 3 2026-06-17
FDX716 FedEx Express 3 2026-06-14
FDX711 FedEx Express 3 2026-05-26
FDX694 FedEx Express 3 2026-06-10
FDX1573 FedEx Express 3 2026-04-15
FDX1434 FedEx Express 3 2026-06-10
FDX1359 FedEx Express 3 2026-04-16
FDX1201 - 3 2026-06-25
FDX988 FedEx Express 2 2026-07-04
FDX888 FedEx Express 2 2026-07-05
FDX886 - 2 2026-07-01
FDX851 FedEx Express 2 2026-04-18
FDX787 FedEx Express 2 2026-04-18
FDX746 - 2 2026-07-05
FDX701 FedEx Express 2 2026-06-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-10 FDX1574 AWM → IND Jul 10, 08:25 UTCJul 10, 09:40 UTC1h 15m
2026-07-10 FDX1574 MEM → IND Jul 10, 08:20 UTCJul 10, 09:37 UTC1h 17m
2026-07-09 FDX58 - Jul 9, 20:05 UTCJul 10, 05:10 UTC9h 5m
2026-07-09 FDX698 - Jul 9, 13:40 UTCJul 9, 16:45 UTC3h 5m
2026-07-09 FDX1853 OAK → ONT Jul 9, 09:30 UTCJul 9, 10:20 UTC50m
2026-07-09 FDX1853 - Jul 9, 09:30 UTCJul 9, 09:45 UTC15m
2026-07-09 FDX1801 - Jul 9, 04:35 UTCJul 9, 05:30 UTC55m
2026-07-09 FDX1801 LAX → OAK Jul 9, 04:31 UTCJul 9, 05:26 UTC55m
2026-07-08 FDX546 - Jul 8, 20:20 UTCJul 8, 23:30 UTC3h 10m
2026-07-08 FDX546 MEM → LAX Jul 8, 20:17 UTCJul 8, 23:30 UTC3h 13m
2026-07-08 FDX420 - Jul 8, 12:55 UTCJul 8, 14:25 UTC1h 30m
2026-07-08 FDX1407 - Jul 8, 09:05 UTCJul 8, 10:35 UTC1h 30m
2026-07-08 FDX1219 - Jul 8, 02:05 UTCJul 8, 05:30 UTC3h 25m
2026-07-07 FDX3724 IND → SJC Jul 7, 19:35 UTCJul 7, 23:25 UTC3h 50m
2026-07-07 FDX3646 ONT → IND Jul 7, 14:00 UTCJul 7, 17:30 UTC3h 30m
2026-07-07 FDX1438 - Jul 7, 09:10 UTCJul 7, 12:20 UTC3h 10m
2026-07-07 FDX2209 - Jul 7, 01:40 UTCJul 7, 03:10 UTC1h 30m
2026-07-07 FDX2209 MCO → MEM Jul 7, 01:39 UTCJul 7, 03:10 UTC1h 31m
2026-07-05 FDX746 - Jul 5, 21:05 UTCJul 5, 22:35 UTC1h 30m
2026-07-05 FDX888 PHL → MEM Jul 5, 12:45 UTCJul 5, 15:45 UTC3h 0m
2026-07-05 FDX888 PHL → MEM Jul 5, 12:43 UTCJul 5, 15:55 UTC3h 12m
2026-07-04 FDX988 MEM → IND Jul 4, 20:10 UTCJul 4, 23:40 UTC3h 30m
2026-07-04 FDX988 MEM → IND Jul 4, 20:06 UTCJul 4, 23:34 UTC3h 28m
2026-07-03 FDX2210 - Jul 3, 02:15 UTCJul 3, 03:50 UTC1h 35m
2026-07-03 FDX2210 TPA → MEM Jul 3, 02:13 UTCJul 3, 03:48 UTC1h 35m
2026-07-02 FDX1759 - Jul 2, 08:25 UTCJul 2, 10:10 UTC1h 45m
2026-07-02 FDX2684 - Jul 2, 02:15 UTCJul 2, 04:20 UTC2h 5m
2026-07-01 FDX331 - Jul 1, 21:35 UTCJul 1, 23:35 UTC2h 0m
2026-07-01 FDX886 - Jul 1, 12:30 UTCJul 1, 13:45 UTC1h 15m
2026-07-01 FDX886 PHL → MEM Jul 1, 12:28 UTCJul 1, 14:19 UTC1h 51m
2026-07-01 FDX1785 - Jul 1, 09:05 UTCJul 1, 10:25 UTC1h 20m
2026-07-01 FDX1685 - Jul 1, 03:40 UTCJul 1, 05:00 UTC1h 20m
2026-07-01 FDX985 - Jul 1, 00:05 UTCJul 1, 02:00 UTC1h 55m
2026-06-30 FDX1243 - Jun 30, 02:30 UTCJun 30, 03:50 UTC1h 20m
2026-06-30 FDX1243 CLT → MEM Jun 30, 02:27 UTCJun 30, 03:50 UTC1h 23m
2026-06-26 FDX1492 - Jun 26, 09:14 UTCJun 26, 10:25 UTC1h 10m
2026-06-26 FDX1312 - Jun 26, 03:34 UTCJun 26, 05:05 UTC1h 30m
2026-06-25 FDX1416 - Jun 25, 08:55 UTCJun 25, 10:15 UTC1h 20m
2026-06-25 FDX1201 - Jun 25, 02:19 UTCJun 25, 03:15 UTC55m
2026-06-25 FDX1201 DFW → MEM Jun 25, 02:16 UTCJun 25, 03:14 UTC58m
2026-06-24 FDX1471 - Jun 24, 07:50 UTCJun 24, 08:49 UTC1h 0m
2026-06-24 FDX1224 - Jun 24, 01:49 UTCJun 24, 03:29 UTC1h 40m
2026-06-23 FDX794 - Jun 23, 21:24 UTCJun 23, 23:00 UTC1h 35m
2026-06-23 FDX436 - Jun 23, 13:00 UTCJun 23, 13:59 UTC1h 0m
2026-06-23 FDX1475 - Jun 23, 09:34 UTCJun 23, 10:49 UTC1h 15m
2026-06-23 FDX52 - Jun 23, 01:20 UTCJun 23, 05:00 UTC3h 40m
2026-06-22 FDX51 - Jun 22, 00:20 UTCJun 22, 00:29 UTC10m
2026-06-21 FDX51 - Jun 21, 20:45 UTCJun 21, 22:49 UTC2h 5m
2026-06-20 FDX451 - Jun 20, 12:34 UTCJun 20, 13:44 UTC1h 10m
2026-06-19 FDX1404 - Jun 19, 07:49 UTCJun 19, 11:09 UTC3h 20m

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 N251FE page for operator, model, and routing details .

Mode-S A25BB7 frequently asked

What is Mode-S code A25BB7?
A25BB7 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N251FE.
Where is Mode-S A25BB7 registered?
Mode-S code A25BB7 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 A25BB7 broadcasting right now?
No active broadcast right now. Last signal was 3d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A25BB7, octal 50455667, decimal 10,640,311.
What flights does A25BB7 operate?
Mode-S A25BB7 has broadcast 20 distinct callsigns, including FDX2210, FDX1432, FDX1227, FDX1450, FDX1243.