Apparatus

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sensors Mode-S transponder

A258B7

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N250NN · EMBRAER ERJ-170-200 (long wing) · operated by AMERICAN AIRLINES INC

Hex
A258B7
Octal
50454267
Decimal
10,639,543
Country
US
Tail
N250NN
Type
E75L
No current signal · last broadcast Jul 26, 20:55 UTC
Flights observed
771
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:55 UTC

Last known position

Most recent position reported by Mode-S A258B7.

Country allocation

The ICAO 24-bit address A258B7 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
ENY3609 - 10 2026-07-06
ENY4020 Envoy Air 9 2026-06-25
ENY3687 - 9 2026-07-17
ENY3556 - 9 2026-06-17
ENY3417 - 9 2026-07-19
ENY3950 - 8 2026-06-28
ENY3428 Envoy Air 8 2026-06-13
ENY3853 Envoy Air 7 2026-05-01
ENY3550 - 7 2026-06-28
ENY4109 - 6 2026-07-02
ENY3901 Envoy Air 6 2026-05-05
ENY3858 - 6 2026-07-06
ENY3746 - 6 2026-07-08
ENY3743 - 6 2026-07-01
ENY3585 - 6 2026-07-06
ENY4224 Envoy Air 5 2026-05-19
ENY4155 Envoy Air 5 2026-07-20
ENY3807 Envoy Air 5 2026-06-09
ENY3749 - 5 2026-06-25
ENY3517 - 5 2026-06-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ENY3875 DFW → SJT Jul 26, 19:15 UTCJul 26, 20:55 UTC1h 40m
2026-07-26 ENY4097 GSP → ORD Jul 26, 16:30 UTCJul 26, 17:30 UTC1h 0m
2026-07-26 ENY4097 GSP → ORD Jul 26, 16:28 UTCJul 26, 17:32 UTC1h 4m
2026-07-26 ENY4097 GSP → ORD Jul 26, 14:40 UTCJul 26, 15:40 UTC1h 0m
2026-07-26 ENY3985 DCA → GRR Jul 26, 12:20 UTCJul 26, 13:05 UTC45m
2026-07-25 ENY4087 CLT → XNA Jul 25, 22:25 UTCJul 26, 00:10 UTC1h 45m
2026-07-25 ENY4087 CLT → XNA Jul 25, 22:21 UTCJul 26, 00:10 UTC1h 49m
2026-07-25 ENY3864 ORD → PWM Jul 25, 18:55 UTCJul 25, 21:00 UTC2h 5m
2026-07-25 ENY3864 ORD → PWM Jul 25, 18:53 UTCJul 25, 20:54 UTC2h 1m
2026-07-25 ENY3864 ORD → PWM Jul 25, 16:25 UTCJul 25, 18:00 UTC1h 35m
2026-07-25 ENY4006 DAY → DFW Jul 25, 12:55 UTCJul 25, 14:20 UTC1h 25m
2026-07-25 ENY3990 ICT → ORD Jul 25, 01:15 UTCJul 25, 02:50 UTC1h 35m
2026-07-24 ENY3560 ORD → RDU Jul 24, 21:05 UTCJul 24, 21:45 UTC40m
2026-07-24 ENY3560 ORD → RDU Jul 24, 19:35 UTCJul 24, 20:15 UTC40m
2026-07-24 ENY3844 ORD → EYW Jul 24, 13:35 UTCJul 24, 18:00 UTC4h 25m
2026-07-24 ENY3404 PHX → FAR Jul 24, 10:20 UTCJul 24, 11:50 UTC1h 30m
2026-07-24 ENY3444 RST → ORD Jul 24, 03:10 UTCJul 24, 04:30 UTC1h 20m
2026-07-24 ENY3633 STL → ORD Jul 24, 00:05 UTCJul 24, 01:25 UTC1h 20m
2026-07-23 ENY3633 STL → ORD Jul 23, 21:35 UTCJul 23, 23:00 UTC1h 25m
2026-07-23 ENY3562 CWA → ORD Jul 23, 19:15 UTCJul 23, 20:00 UTC45m
2026-07-23 ENY3562 CWA → ORD Jul 23, 19:14 UTCJul 23, 19:56 UTC42m
2026-07-23 ENY3562 CWA → ORD Jul 23, 17:20 UTCJul 23, 17:55 UTC35m
2026-07-23 ENY3871 BOS → ORD Jul 23, 14:10 UTCJul 23, 15:55 UTC1h 45m
2026-07-23 ENY3871 BOS → ORD Jul 23, 14:09 UTCJul 23, 15:54 UTC1h 45m
2026-07-23 ENY3693 DFW → XNA Jul 23, 03:40 UTCJul 23, 04:25 UTC45m
2026-07-23 ENY3693 DFW → XNA Jul 23, 03:40 UTCJul 23, 04:23 UTC43m
2026-07-23 ENY3787 IND → DCA Jul 23, 01:25 UTCJul 23, 02:35 UTC1h 10m
2026-07-22 ENY3787 IND → DCA Jul 22, 23:30 UTCJul 23, 00:40 UTC1h 10m
2026-07-22 ENY3483 SYR → ORD Jul 22, 16:30 UTCJul 22, 21:45 UTC5h 15m
2026-07-22 ENY4277 RAP → DFW Jul 22, 01:20 UTCJul 22, 14:30 UTC13h 10m
2026-07-21 ENY3382 MSY → DCA Jul 21, 23:20 UTCJul 21, 23:55 UTC35m
2026-07-21 ENY3382 MSY → DCA Jul 21, 23:17 UTCJul 21, 23:50 UTC33m
2026-07-21 ENY3382 MSY → DCA Jul 21, 22:00 UTCJul 21, 22:20 UTC20m
2026-07-21 ENY3441 GSP → MIA Jul 21, 19:55 UTCJul 21, 21:05 UTC1h 10m
2026-07-21 ENY3441 GSP → MIA Jul 21, 19:47 UTCJul 21, 20:59 UTC1h 12m
2026-07-21 ENY3441 GSP → MIA Jul 21, 17:50 UTCJul 21, 18:50 UTC1h 0m
2026-07-21 ENY3495 IND → ORD Jul 21, 14:55 UTCJul 21, 16:20 UTC1h 25m
2026-07-21 ENY3495 IND → ORD Jul 21, 12:30 UTCJul 21, 14:00 UTC1h 30m
2026-07-21 ENY4075 CRP → DFW Jul 21, 10:30 UTCJul 21, 11:20 UTC50m
2026-07-21 ENY4116 CVG → BOS Jul 21, 02:50 UTCJul 21, 03:40 UTC50m
2026-07-20 ENY3803 SGF → DFW Jul 20, 23:50 UTCJul 21, 00:50 UTC1h 0m
2026-07-20 ENY3803 SGF → DFW Jul 20, 23:49 UTCJul 21, 00:43 UTC54m
2026-07-20 ENY3803 - Jul 20, 21:50 UTCJul 20, 22:45 UTC55m
2026-07-20 ENY4155 CRP → DFW Jul 20, 19:50 UTCJul 20, 20:20 UTC30m
2026-07-20 ENY4155 CRP → DFW Jul 20, 19:44 UTCJul 20, 20:19 UTC35m
2026-07-20 ENY4155 CRP → DFW Jul 20, 18:25 UTCJul 20, 18:45 UTC20m
2026-07-20 ENY3805 CRP → DFW Jul 20, 16:30 UTCJul 20, 17:05 UTC35m
2026-07-20 ENY3805 CRP → DFW Jul 20, 14:40 UTCJul 20, 15:20 UTC40m
2026-07-20 ENY3780 BOS → ORD Jul 20, 12:15 UTCJul 20, 13:00 UTC45m
2026-07-20 ENY3510 - Jul 20, 01:25 UTCJul 20, 02:05 UTC40m

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 N250NN page for operator, model, and routing details .

Mode-S A258B7 frequently asked

What is Mode-S code A258B7?
A258B7 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N250NN.
Where is Mode-S A258B7 registered?
Mode-S code A258B7 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 A258B7 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A258B7, octal 50454267, decimal 10,639,543.
What flights does A258B7 operate?
Mode-S A258B7 has broadcast 20 distinct callsigns, including ENY3609, ENY4020, ENY3687, ENY3556, ENY3417.