Apparatus

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sensors Mode-S transponder

A272B8

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N257NN · EMBRAER ERJ-170-200 (long wing) · operated by AMERICAN AIRLINES INC

Hex
A272B8
Octal
50471270
Decimal
10,646,200
Country
US
Tail
N257NN
Type
E75L
Broadcasting now · callsign ENY3357 · 27,525 ft
Flights observed
681
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Current position

A272B8 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A272B8 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
ENY3993 Envoy Air 11 2026-04-16
ENY4204 - 8 2026-07-06
ENY3853 Envoy Air 7 2026-05-04
ENY3651 - 7 2026-07-09
ENY3418 Envoy Air 7 2026-05-04
ENY3657 - 6 2026-07-02
ENY3593 - 6 2026-06-28
ENY3338 Envoy Air 6 2026-06-04
ENY4035 - 5 2026-06-19
ENY3911 - 5 2026-07-06
ENY3825 - 5 2026-06-29
ENY3793 - 5 2026-07-05
ENY3788 - 5 2026-06-24
ENY3726 - 5 2026-07-09
ENY3577 Envoy Air 5 2026-06-11
ENY3545 Envoy Air 5 2026-05-01
ENY3463 Envoy Air 5 2026-05-30
ENY3442 - 5 2026-07-04
ENY3399 - 5 2026-07-10
ENY3367 Envoy Air 5 2026-06-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 ENY3557 - Jul 15, 00:15 UTCJul 15, 02:00 UTC1h 45m
2026-07-14 ENY3558 - Jul 14, 21:30 UTCJul 14, 23:05 UTC1h 34m
2026-07-14 ENY3822 ATL → MIA Jul 14, 18:45 UTCJul 14, 20:20 UTC1h 35m
2026-07-14 ENY3822 ATL → MIA Jul 14, 18:45 UTCJul 14, 20:11 UTC1h 26m
2026-07-14 ENY3822 - Jul 14, 16:25 UTCJul 14, 17:50 UTC1h 25m
2026-07-14 ENY4039 - Jul 14, 14:25 UTCJul 14, 14:50 UTC25m
2026-07-14 ENY4039 - Jul 14, 12:35 UTCJul 14, 12:55 UTC20m
2026-07-14 ENY3682 SAV → MIA Jul 14, 10:15 UTCJul 14, 11:25 UTC1h 10m
2026-07-14 ENY3920 - Jul 14, 02:45 UTCJul 14, 04:05 UTC1h 20m
2026-07-14 ENY3920 MIA → SAV Jul 14, 02:42 UTCJul 14, 04:04 UTC1h 22m
2026-07-13 ENY3487 - Jul 13, 22:35 UTCJul 14, 00:45 UTC2h 10m
2026-07-13 ENY3950 - Jul 13, 20:45 UTCJul 13, 21:30 UTC45m
2026-07-13 ENY3950 ORD → CVG Jul 13, 20:43 UTCJul 13, 21:30 UTC47m
2026-07-13 ENY3961 - Jul 13, 18:05 UTCJul 13, 18:50 UTC45m
2026-07-13 ENY3961 CMH → ORD Jul 13, 18:02 UTCJul 13, 18:53 UTC51m
2026-07-13 ENY4163 - Jul 13, 15:00 UTCJul 13, 17:00 UTC2h 0m
2026-07-13 ENY4052 - Jul 13, 11:25 UTCJul 13, 13:45 UTC2h 20m
2026-07-12 ENY4087 - Jul 12, 23:05 UTCJul 13, 00:50 UTC1h 45m
2026-07-12 ENY4146 - Jul 12, 19:50 UTCJul 12, 21:15 UTC1h 25m
2026-07-12 ENY4146 - Jul 12, 17:15 UTCJul 12, 18:40 UTC1h 25m
2026-07-12 ENY3871 - Jul 12, 14:05 UTCJul 12, 15:50 UTC1h 45m
2026-07-12 ENY3871 XNA → CLT Jul 12, 14:01 UTCJul 12, 15:48 UTC1h 47m
2026-07-12 ENY4101 - Jul 12, 01:00 UTCJul 12, 02:01 UTC1h 0m
2026-07-11 ENY3689 - Jul 11, 22:40 UTCJul 11, 23:55 UTC1h 15m
2026-07-11 ENY3689 MFE → DFW Jul 11, 22:37 UTCJul 11, 23:53 UTC1h 16m
2026-07-11 ENY3689 - Jul 11, 20:40 UTCJul 11, 21:45 UTC1h 5m
2026-07-11 ENY3776 - Jul 11, 17:40 UTCJul 11, 19:05 UTC1h 25m
2026-07-11 ENY3776 - Jul 11, 14:50 UTCJul 11, 16:00 UTC1h 10m
2026-07-11 ENY4024 - Jul 11, 10:55 UTCJul 11, 13:05 UTC2h 10m
2026-07-11 ENY4019 - Jul 11, 00:45 UTCJul 11, 03:01 UTC2h 15m
2026-07-10 ENY3575 - Jul 10, 22:10 UTCJul 10, 23:20 UTC1h 10m
2026-07-10 ENY3575 HRL → DFW Jul 10, 22:04 UTCJul 10, 23:15 UTC1h 11m
2026-07-10 ENY3575 - Jul 10, 20:15 UTCJul 10, 21:20 UTC1h 5m
2026-07-10 ENY3399 - Jul 10, 16:30 UTCJul 10, 18:30 UTC2h 0m
2026-07-10 ENY3399 - Jul 10, 13:30 UTCJul 10, 15:20 UTC1h 50m
2026-07-10 ENY3394 - Jul 10, 10:15 UTCJul 10, 11:40 UTC1h 25m
2026-07-10 ENY4278 DFW → HSV Jul 10, 03:10 UTCJul 10, 04:35 UTC1h 25m
2026-07-10 ENY3729 OKC → DFW Jul 10, 00:45 UTCJul 10, 01:20 UTC35m
2026-07-09 ENY3729 DFW → OKC Jul 9, 22:50 UTCJul 9, 23:30 UTC40m
2026-07-09 ENY3726 AUS → DFW Jul 9, 20:50 UTCJul 9, 21:40 UTC50m
2026-07-09 ENY3726 - Jul 9, 19:05 UTCJul 9, 19:40 UTC35m
2026-07-09 ENY3651 - Jul 9, 17:05 UTCJul 9, 17:55 UTC50m
2026-07-09 ENY3651 MAF → DFW Jul 9, 17:00 UTCJul 9, 17:52 UTC52m
2026-07-09 ENY3651 - Jul 9, 15:10 UTCJul 9, 15:55 UTC45m
2026-07-09 ENY3746 - Jul 9, 12:05 UTCJul 9, 14:15 UTC2h 10m
2026-07-09 ENY3937 - Jul 9, 02:50 UTCJul 9, 05:30 UTC2h 40m
2026-07-09 ENY3548 - Jul 9, 01:10 UTCJul 9, 01:40 UTC30m
2026-07-08 ENY3548 - Jul 8, 23:40 UTCJul 9, 00:05 UTC25m
2026-07-08 ENY3791 - Jul 8, 18:00 UTCJul 8, 19:50 UTC1h 50m
2026-07-08 ENY3791 DFW → SDF Jul 8, 15:00 UTCJul 8, 16:50 UTC1h 50m

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 N257NN page for operator, model, and routing details .

Mode-S A272B8 frequently asked

What is Mode-S code A272B8?
A272B8 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N257NN.
Where is Mode-S A272B8 registered?
Mode-S code A272B8 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 A272B8 broadcasting right now?
Yes. Mode-S A272B8 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A272B8, octal 50471270, decimal 10,646,200.
What flights does A272B8 operate?
Mode-S A272B8 has broadcast 20 distinct callsigns, including ENY3993, ENY4204, ENY3853, ENY3651, ENY3418.