Apparatus

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sensors Mode-S transponder

A3B398

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N338AS · operated by AMERICAN AIRLINES INC

Hex
A3B398
Octal
50731630
Decimal
10,728,344
Country
US
Tail
N338AS
Broadcasting now · callsign ENY4204 · 12,950 ft
Flights observed
386
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Current position

A3B398 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A3B398 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
ENY3680 Envoy Air 10 2026-05-29
ENY4138 Envoy Air 6 2026-04-17
ENY3419 Envoy Air 6 2026-06-03
ENY4314 Envoy Air 5 2026-05-26
ENY4020 Envoy Air 5 2026-06-04
ENY4007 Envoy Air 5 2026-05-29
ENY3992 Envoy Air 5 2026-06-11
ENY3880 Envoy Air 5 2026-05-24
ENY3806 Envoy Air 5 2026-05-27
ENY3802 Envoy Air 5 2026-04-24
ENY3468 Envoy Air 5 2026-05-16
ENY3440 Envoy Air 5 2026-06-11
ENY4175 Envoy Air 4 2026-06-03
ENY4104 Envoy Air 4 2026-04-16
ENY4071 Envoy Air 4 2026-05-28
ENY3946 Envoy Air 4 2026-05-17
ENY3927 Envoy Air 4 2026-05-28
ENY3784 Envoy Air 4 2026-06-09
ENY3575 Envoy Air 4 2026-06-07
ENY3499 Envoy Air 4 2026-05-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-12 ENY4204 DFW → CMH Jun 12, 23:25 UTCJun 13, 00:00 UTC35m
2026-06-12 ENY3793 TLH → DCA Jun 12, 19:45 UTCJun 12, 22:10 UTC2h 25m
2026-06-12 ENY3793 TLH → DCA Jun 12, 15:55 UTCJun 12, 18:35 UTC2h 40m
2026-06-12 ENY3882 BDL → MIA Jun 12, 12:35 UTCJun 12, 14:45 UTC2h 10m
2026-06-12 ENY3882 BDL → MIA Jun 12, 12:30 UTCJun 12, 14:44 UTC2h 14m
2026-06-12 ENY3874 ORD → CVG Jun 12, 02:35 UTCJun 12, 04:35 UTC2h 0m
2026-06-12 ENY3874 ORD → CVG Jun 12, 02:33 UTCJun 12, 04:41 UTC2h 8m
2026-06-11 ENY3440 CMI → ORD Jun 11, 22:35 UTCJun 12, 00:55 UTC2h 21m
2026-06-11 ENY3440 CMI → ORD Jun 11, 18:50 UTCJun 11, 21:30 UTC2h 40m
2026-06-11 ENY3992 XNA → DFW Jun 11, 16:45 UTCJun 11, 17:50 UTC1h 5m
2026-06-11 ENY3992 XNA → DFW Jun 11, 14:35 UTCJun 11, 15:40 UTC1h 5m
2026-06-11 ENY3907 JAX → ORD Jun 11, 11:10 UTCJun 11, 13:25 UTC2h 15m
2026-06-11 ENY3933 LEX → ORD Jun 11, 02:20 UTCJun 11, 04:10 UTC1h 50m
2026-06-10 ENY3440 CMI → ORD Jun 10, 22:55 UTCJun 11, 01:05 UTC2h 10m
2026-06-10 ENY3440 CMI → ORD Jun 10, 22:51 UTCJun 11, 01:00 UTC2h 9m
2026-06-10 ENY3440 CMI → ORD Jun 10, 18:45 UTCJun 10, 21:40 UTC2h 55m
2026-06-10 ENY3992 XNA → DFW Jun 10, 16:25 UTCJun 10, 17:35 UTC1h 10m
2026-06-10 ENY3992 XNA → DFW Jun 10, 16:23 UTCJun 10, 17:33 UTC1h 10m
2026-06-10 ENY3992 XNA → DFW Jun 10, 14:35 UTCJun 10, 15:40 UTC1h 5m
2026-06-10 ENY3907 JAX → ORD Jun 10, 11:05 UTCJun 10, 13:10 UTC2h 5m
2026-06-10 ENY3933 LEX → ORD Jun 10, 02:30 UTCJun 10, 04:00 UTC1h 30m
2026-06-10 ENY3933 LEX → ORD Jun 10, 02:26 UTCJun 10, 04:22 UTC1h 56m
2026-06-10 ENY4035 CMH → DCA Jun 10, 00:00 UTCJun 10, 01:10 UTC1h 10m
2026-06-09 ENY4035 CMH → DCA Jun 9, 23:55 UTCJun 10, 01:06 UTC1h 11m
2026-06-09 ENY4035 CMH → DCA Jun 9, 21:50 UTCJun 9, 22:55 UTC1h 5m
2026-06-09 ENY3784 DCA → CMH Jun 9, 20:00 UTCJun 9, 20:40 UTC40m
2026-06-09 ENY3784 DCA → CMH Jun 9, 19:25 UTCJun 9, 20:33 UTC1h 8m
2026-06-09 ENY3784 DCA → CMH Jun 9, 18:30 UTCJun 9, 19:05 UTC35m
2026-06-09 ENY3335 EVV → DFW Jun 9, 13:45 UTCJun 9, 15:50 UTC2h 5m
2026-06-09 ENY3335 EVV → DFW Jun 9, 13:35 UTCJun 9, 16:26 UTC2h 51m
2026-06-09 ENY3375 ORD → IND Jun 9, 04:15 UTCJun 9, 04:55 UTC40m
2026-06-09 ENY3642 DFW → LIT Jun 9, 02:15 UTCJun 9, 03:15 UTC1h 0m
2026-06-09 ENY3642 DFW → LIT Jun 9, 00:35 UTCJun 9, 01:35 UTC1h 0m
2026-06-08 ENY3966 DFW → MSY Jun 8, 19:43 UTCJun 8, 22:24 UTC2h 41m
2026-06-08 ENY3966 DFW → MSY Jun 8, 16:00 UTCJun 8, 22:30 UTC6h 30m
2026-06-08 ENY4290 MSY → MIA Jun 8, 12:35 UTCJun 8, 14:25 UTC1h 50m
2026-06-08 ENY4291 ORD → FCA Jun 8, 02:10 UTCJun 8, 03:40 UTC1h 30m
2026-06-08 ENY4291 ORD → FCA Jun 8, 02:06 UTCJun 8, 03:35 UTC1h 29m
2026-06-07 ENY966G DFW → MID Jun 7, 17:35 UTCJun 8, 00:35 UTC7h 0m
2026-06-07 ENY3624 ORD → LSE Jun 7, 13:35 UTCJun 7, 15:50 UTC2h 15m
2026-06-07 ENY3624 ORD → LSE Jun 7, 13:32 UTCJun 7, 15:33 UTC2h 1m
2026-06-07 ENY4092 DFW → SGF Jun 7, 05:22 UTCJun 7, 06:19 UTC57m
2026-06-07 ENY4092 DFW → SGF Jun 7, 05:25 UTCJun 7, 06:20 UTC55m
2026-06-07 ENY3575 MSN → ORD Jun 7, 03:25 UTCJun 7, 03:45 UTC20m
2026-06-07 ENY3575 MSN → ORD Jun 7, 01:45 UTCJun 7, 03:45 UTC2h 0m
2026-06-07 ENY3575 MSN → ORD Jun 7, 01:41 UTCJun 7, 03:10 UTC1h 29m
2026-06-06 ENY3575 MSN → ORD Jun 6, 20:35 UTCJun 6, 21:40 UTC1h 5m
2026-06-06 ENY3526 DFW → SAT Jun 6, 17:19 UTCJun 6, 19:40 UTC2h 20m
2026-06-06 ENY3526 DFW → SAT Jun 6, 17:17 UTCJun 6, 19:33 UTC2h 16m
2026-06-06 ENY3526 DFW → SAT Jun 6, 14:00 UTCJun 6, 16:04 UTC2h 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 N338AS page for operator, model, and routing details .

Mode-S A3B398 frequently asked

What is Mode-S code A3B398?
A3B398 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N338AS.
Where is Mode-S A3B398 registered?
Mode-S code A3B398 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 A3B398 broadcasting right now?
Yes. Mode-S A3B398 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3B398, octal 50731630, decimal 10,728,344.
What flights does A3B398 operate?
Mode-S A3B398 has broadcast 20 distinct callsigns, including ENY3680, ENY4138, ENY3419, ENY4314, ENY4020.