Apparatus

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sensors Mode-S transponder

A2C0FF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N277FE · BOEING 767-300 · operated by FEDERAL EXPRESS CORP

Hex
A2C0FF
Octal
50540377
Decimal
10,666,239
Country
US
Tail
N277FE
Type
B763
No current signal · last broadcast 11h ago
Flights observed
121
Distinct callsigns
20
Country
US
Last broadcast
11h ago

Last known position

Most recent position reported by Mode-S A2C0FF.

Country allocation

The ICAO 24-bit address A2C0FF 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
FDX1748 FedEx Express 4 2026-04-24
FDX3951 FedEx Express 3 2026-04-15
FDX1857 FedEx Express 3 2026-05-15
FDX1600 FedEx Express 3 2026-05-22
FDX1444 FedEx Express 3 2026-05-21
FDX1410 FedEx Express 3 2026-05-29
FDX1344 FedEx Express 3 2026-05-14
FDX944 FedEx Express 2 2026-05-14
FDX820 - 2 2026-04-16
FDX743 FedEx Express 2 2026-04-15
FDX604 FedEx Express 2 2026-04-25
FDX601 FedEx Express 2 2026-05-14
FDX547 FedEx Express 2 2026-04-19
FDX51 FedEx Express 2 2026-04-26
FDX415 FedEx Express 2 2026-04-15
FDX3926 FedEx Express 2 2026-05-23
FDX3709 FedEx Express 2 2026-05-21
FDX1874 FedEx Express 2 2026-05-07
FDX1838 FedEx Express 2 2026-05-06
FDX1837 FedEx Express 2 2026-05-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 FDX1706 IND → ORD Jun 2, 08:55 UTCJun 2, 09:40 UTC45m
2026-06-02 FDX1622 PIT → IND Jun 2, 02:15 UTCJun 2, 03:10 UTC55m
2026-06-02 FDX1622 PIT → IND Jun 2, 02:14 UTCJun 2, 03:06 UTC52m
2026-05-30 FDX1446 MEM → PIT May 30, 08:50 UTCMay 30, 10:10 UTC1h 20m
2026-05-30 FDX1210 TPA → MEM May 30, 02:06 UTCMay 30, 03:30 UTC1h 24m
2026-05-29 FDX1410 MEM → TPA May 29, 08:40 UTCMay 29, 10:05 UTC1h 25m
2026-05-29 FDX1410 MEM → TPA May 29, 08:35 UTCMay 29, 10:05 UTC1h 30m
2026-05-29 FDX1243 CLT → MEM May 29, 02:30 UTCMay 29, 03:40 UTC1h 10m
2026-05-28 FDX1729 IND → CLT May 28, 08:35 UTCMay 28, 09:30 UTC55m
2026-05-28 FDX1610 BOS → IND May 28, 02:25 UTCMay 28, 04:30 UTC2h 5m
2026-05-27 FDX3714 IND → BOS May 27, 21:25 UTCMay 27, 23:05 UTC1h 40m
2026-05-27 FDX3619 LAX → IND May 27, 14:00 UTCMay 27, 17:40 UTC3h 40m
2026-05-27 FDX1869 OAK → LAX May 27, 10:45 UTCMay 27, 11:35 UTC50m
2026-05-27 FDX1835 LAX → OAK May 27, 05:24 UTCMay 27, 06:20 UTC55m
2026-05-26 FDX326 MEM → LAX May 26, 20:54 UTCMay 27, 00:14 UTC3h 20m
2026-05-26 FDX630 SEA → MEM May 26, 13:10 UTCMay 26, 16:59 UTC3h 50m
2026-05-23 FDX3954 SEA → LAX May 23, 18:25 UTCMay 23, 23:55 UTC5h 30m
2026-05-23 FDX3926 BOS → EWR May 23, 03:00 UTCMay 23, 03:51 UTC51m
2026-05-23 FDX3926 BOS → EWR May 23, 03:05 UTCMay 23, 03:55 UTC50m
2026-05-22 FDX1710 IND → BOS May 22, 09:05 UTCMay 22, 10:45 UTC1h 40m
2026-05-22 FDX1600 EWR → IND May 22, 02:15 UTCMay 22, 04:05 UTC1h 50m
2026-05-21 FDX3709 IND → EWR May 21, 21:00 UTCMay 21, 22:30 UTC1h 30m
2026-05-21 FDX3709 IND → EWR May 21, 21:00 UTCMay 21, 22:24 UTC1h 24m
2026-05-21 FDX3605 BOS → IND May 21, 11:40 UTCMay 21, 13:50 UTC2h 10m
2026-05-21 FDX1444 MEM → MIA May 21, 08:15 UTCMay 21, 10:00 UTC1h 45m
2026-05-21 FDX1221 ATL → MEM May 21, 02:05 UTCMay 21, 03:00 UTC55m
2026-05-20 FDX1421 MEM → ATL May 20, 08:15 UTCMay 20, 09:00 UTC45m
2026-05-20 FDX1421 MEM → ATL May 20, 08:10 UTCMay 20, 08:58 UTC48m
2026-05-20 FDX1261 MIA → MEM May 20, 00:50 UTCMay 20, 02:50 UTC2h 0m
2026-05-19 FDX1461 MEM → MIA May 19, 08:35 UTCMay 19, 10:20 UTC1h 45m
2026-05-19 FDX1281 GSP → MEM May 19, 02:05 UTCMay 19, 03:05 UTC1h 0m
2026-05-16 FDX1506 MEM → GSP May 16, 09:45 UTCMay 16, 10:40 UTC55m
2026-05-16 FDX1216 PDX → MEM May 16, 01:45 UTCMay 16, 05:10 UTC3h 25m
2026-05-15 FDX1857 OAK → PDX May 15, 09:50 UTCMay 15, 11:05 UTC1h 15m
2026-05-15 FDX1803 ONT → OAK May 15, 04:50 UTCMay 15, 05:40 UTC50m
2026-05-14 FDX944 MEM → LAX May 14, 20:10 UTCMay 14, 23:30 UTC3h 20m
2026-05-14 FDX944 MEM → LAX May 14, 20:09 UTCMay 14, 23:24 UTC3h 15m
2026-05-14 FDX601 PHX → MEM May 14, 12:00 UTCMay 14, 13:50 UTC1h 50m
2026-05-14 FDX1400 MEM → FLL May 14, 08:35 UTCMay 14, 10:20 UTC1h 45m
2026-05-14 FDX1344 TUS → MEM May 14, 02:00 UTCMay 14, 04:20 UTC2h 20m
2026-05-14 FDX1344 TUS → MEM May 14, 01:56 UTCMay 14, 04:24 UTC2h 28m
2026-05-13 FDX1414 MEM → TUS May 13, 09:50 UTCMay 13, 12:30 UTC2h 40m
2026-05-13 FDX1213 BUR → MEM May 13, 02:05 UTCMay 13, 05:20 UTC3h 15m
2026-05-12 FDX1417 MEM → BUR May 12, 08:20 UTCMay 12, 11:40 UTC3h 20m
2026-05-12 FDX1210 TPA → MEM May 12, 02:45 UTCMay 12, 03:40 UTC55m
2026-05-09 FDX1410 MEM → TPA May 9, 08:50 UTCMay 9, 10:10 UTC1h 20m
2026-05-09 FDX1346 CLE → MEM May 9, 02:20 UTCMay 9, 03:50 UTC1h 30m
2026-05-08 FDX1552 MEM → CLE May 8, 09:09 UTCMay 8, 10:29 UTC1h 20m
2026-05-08 FDX1552 MEM → CLE May 8, 09:09 UTCMay 8, 10:26 UTC1h 17m
2026-05-08 FDX1290 RNO → MEM May 8, 02:09 UTCMay 8, 05:14 UTC3h 5m

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 N277FE page for operator, model, and routing details .

Mode-S A2C0FF frequently asked

What is Mode-S code A2C0FF?
A2C0FF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N277FE.
Where is Mode-S A2C0FF registered?
Mode-S code A2C0FF 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 A2C0FF broadcasting right now?
No active broadcast right now. Last signal was 11h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2C0FF, octal 50540377, decimal 10,666,239.
What flights does A2C0FF operate?
Mode-S A2C0FF has broadcast 20 distinct callsigns, including FDX1748, FDX3951, FDX1857, FDX1600, FDX1444.