Apparatus

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sensors Mode-S transponder

A252A7

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N249NN · EMBRAER ERJ-170-200 (long wing) · operated by AMERICAN AIRLINES INC

Hex
A252A7
Octal
50451247
Decimal
10,637,991
Country
US
Tail
N249NN
Type
E75L
No current signal · last broadcast Jul 26, 21:45 UTC
Flights observed
729
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:45 UTC

Last known position

Most recent position reported by Mode-S A252A7.

Country allocation

The ICAO 24-bit address A252A7 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
ENY3981 - 10 2026-07-09
ENY3562 - 10 2026-07-06
ENY3563 Envoy Air 7 2026-07-04
ENY3535 Envoy Air 7 2026-05-29
ENY4212 Envoy Air 6 2026-04-23
ENY4146 - 6 2026-07-05
ENY4101 Envoy Air 6 2026-04-24
ENY4043 Envoy Air 6 2026-04-24
ENY3960 - 6 2026-07-13
ENY3701 Envoy Air 6 2026-06-01
ENY3630 - 6 2026-06-18
ENY3560 Envoy Air 6 2026-05-30
ENY3509 Envoy Air 6 2026-05-10
ENY4166 Envoy Air 5 2026-06-05
ENY4138 - 5 2026-06-18
ENY4121 - 5 2026-06-26
ENY4087 - 5 2026-07-05
ENY4054 - 5 2026-07-07
ENY4020 - 5 2026-07-16
ENY4017 Envoy Air 5 2026-05-31

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ENY3852 GRB → ORD Jul 26, 20:45 UTCJul 26, 21:45 UTC1h 0m
2026-07-26 ENY3852 GRB → ORD Jul 26, 17:10 UTCJul 26, 19:20 UTC2h 10m
2026-07-26 ENY3906 PNS → MIA Jul 26, 13:50 UTCJul 26, 15:35 UTC1h 45m
2026-07-26 ENY3832 FSD → ORD Jul 26, 03:55 UTCJul 26, 05:55 UTC2h 0m
2026-07-26 ENY4204 DFW → CMH Jul 26, 02:00 UTCJul 26, 02:50 UTC50m
2026-07-26 ENY4204 DFW → CMH Jul 26, 01:58 UTCJul 26, 02:49 UTC51m
2026-07-26 ENY4204 DFW → CMH Jul 26, 00:20 UTCJul 26, 01:10 UTC50m
2026-07-25 ENY3650 ORD → SYR Jul 25, 18:40 UTCJul 25, 22:05 UTC3h 25m
2026-07-25 ENY4038 TUL → PHX Jul 25, 15:05 UTCJul 25, 17:00 UTC1h 55m
2026-07-25 ENY3426 ORD → CVG Jul 25, 13:35 UTCJul 25, 14:20 UTC45m
2026-07-25 ENY3601 GRR → MIA Jul 25, 11:10 UTCJul 25, 11:45 UTC35m
2026-07-25 ENY3601 GRR → MIA Jul 25, 11:05 UTCJul 25, 11:36 UTC31m
2026-07-25 ENY3666 JAX → ORD Jul 25, 04:05 UTCJul 25, 04:25 UTC20m
2026-07-25 ENY3351 ROC → ORD Jul 25, 02:00 UTCJul 25, 02:50 UTC50m
2026-07-25 ENY3351 ROC → ORD Jul 25, 01:54 UTCJul 25, 02:44 UTC50m
2026-07-25 ENY3351 ROC → ORD Jul 25, 00:30 UTCJul 25, 01:10 UTC40m
2026-07-24 ENY3580 MSY → DCA Jul 24, 21:50 UTCJul 24, 23:20 UTC1h 30m
2026-07-24 ENY3580 MSY → DCA Jul 24, 18:25 UTCJul 24, 19:50 UTC1h 25m
2026-07-24 ENY3576 ORD → FAR Jul 24, 15:55 UTCJul 24, 17:05 UTC1h 10m
2026-07-24 ENY3576 ORD → FAR Jul 24, 15:52 UTCJul 24, 17:04 UTC1h 12m
2026-07-24 ENY3576 ORD → FAR Jul 24, 14:00 UTCJul 24, 15:05 UTC1h 5m
2026-07-24 ENY3418 AUS → ORD Jul 24, 10:05 UTCJul 24, 12:10 UTC2h 5m
2026-07-23 ENY3995 DFW → CMH Jul 23, 22:50 UTCJul 23, 23:45 UTC55m
2026-07-23 ENY3995 DFW → CMH Jul 23, 22:46 UTCJul 24, 00:44 UTC1h 58m
2026-07-23 ENY3441 GSP → MIA Jul 23, 20:00 UTCJul 23, 21:20 UTC1h 20m
2026-07-23 ENY3441 GSP → MIA Jul 23, 17:50 UTCJul 23, 18:55 UTC1h 5m
2026-07-23 ENY3486 AZO → ORD Jul 23, 15:25 UTCJul 23, 16:30 UTC1h 5m
2026-07-23 ENY3486 AZO → ORD Jul 23, 13:25 UTCJul 23, 14:20 UTC55m
2026-07-23 ENY3353 - Jul 23, 10:40 UTCJul 23, 12:00 UTC1h 20m
2026-07-23 ENY3412 DFW → BRO Jul 23, 04:10 UTCJul 23, 05:20 UTC1h 10m
2026-07-23 ENY3890 CVG → CLT Jul 23, 00:40 UTCJul 23, 02:00 UTC1h 20m
2026-07-22 ENY3890 CVG → CLT Jul 22, 22:30 UTCJul 22, 23:25 UTC55m
2026-07-22 ENY3618 - Jul 22, 20:25 UTCJul 22, 21:15 UTC50m
2026-07-22 ENY3618 LBB → DFW Jul 22, 20:19 UTCJul 22, 21:09 UTC50m
2026-07-22 ENY3618 - Jul 22, 18:30 UTCJul 22, 19:10 UTC40m
2026-07-22 ENY3442 ORD → EWR Jul 22, 15:50 UTCJul 22, 17:00 UTC1h 10m
2026-07-22 ENY3442 ORD → EWR Jul 22, 13:55 UTCJul 22, 15:05 UTC1h 10m
2026-07-22 ENY3956 - Jul 22, 11:10 UTCJul 22, 12:20 UTC1h 10m
2026-07-22 ENY3956 MHK → DFW Jul 22, 11:05 UTCJul 22, 12:15 UTC1h 10m
2026-07-22 ENY3928 ORD → RDU Jul 22, 03:50 UTCJul 22, 04:50 UTC1h 0m
2026-07-22 ENY3928 ORD → RDU Jul 22, 03:47 UTCJul 22, 04:54 UTC1h 7m
2026-07-22 ENY3542 CVG → BOS Jul 22, 00:45 UTCJul 22, 01:55 UTC1h 10m
2026-07-22 ENY3542 CVG → BOS Jul 22, 00:39 UTCJul 22, 01:51 UTC1h 12m
2026-07-21 ENY3542 CVG → BOS Jul 21, 22:40 UTCJul 21, 23:55 UTC1h 15m
2026-07-21 ENY3676 MIA → CVG Jul 21, 20:25 UTCJul 21, 21:30 UTC1h 5m
2026-07-21 ENY3676 MIA → CVG Jul 21, 20:22 UTCJul 21, 21:27 UTC1h 5m
2026-07-21 ENY3676 MIA → CVG Jul 21, 17:50 UTCJul 21, 18:55 UTC1h 5m
2026-07-21 ENY4005 TRC → DFW Jul 21, 15:35 UTCJul 21, 16:20 UTC45m
2026-07-21 ENY4005 TRC → DFW Jul 21, 13:40 UTCJul 21, 14:35 UTC55m
2026-07-21 ENY3473 STL → MIA Jul 21, 10:20 UTCJul 21, 11:55 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 N249NN page for operator, model, and routing details .

Mode-S A252A7 frequently asked

What is Mode-S code A252A7?
A252A7 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N249NN.
Where is Mode-S A252A7 registered?
Mode-S code A252A7 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 A252A7 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A252A7, octal 50451247, decimal 10,637,991.
What flights does A252A7 operate?
Mode-S A252A7 has broadcast 20 distinct callsigns, including ENY3981, ENY3562, ENY3563, ENY3535, ENY4212.