Apparatus

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sensors Mode-S transponder

ACF2E4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N933XJ · BOMBARDIER Regional Jet CRJ-900 · operated by DELTA AIR LINES INC

Hex
ACF2E4
Octal
53171344
Decimal
11,334,372
Country
US
Tail
N933XJ
Type
CRJ9
No current signal · last broadcast Jul 26, 23:00 UTC
Flights observed
466
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 23:00 UTC

Last known position

Most recent position reported by Mode-S ACF2E4.

Country allocation

The ICAO 24-bit address ACF2E4 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
EDV5091 - 8 2026-07-05
EDV5059 Endeavor Air 7 2026-06-05
EDV5483 - 6 2026-07-20
EDV4955 Endeavor Air 6 2026-06-10
EDV5450 Endeavor Air 5 2026-06-10
EDV5438 - 5 2026-07-11
EDV5423 Endeavor Air 5 2026-07-23
EDV5418 Endeavor Air 5 2026-04-19
EDV5361 - 5 2026-07-16
EDV5314 - 5 2026-06-17
EDV5308 Endeavor Air 5 2026-07-05
EDV5263 - 5 2026-06-23
EDV5247 Endeavor Air 5 2026-06-14
EDV4958 Endeavor Air 5 2026-06-10
EDV4922 - 5 2026-06-27
EDV4648 Endeavor Air 5 2026-07-22
EDV5554 - 4 2026-07-17
EDV5449 Endeavor Air 4 2026-07-24
EDV5374 - 4 2026-07-06
EDV5344 Endeavor Air 4 2026-04-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 EDV5345 MSN → LGA Jul 26, 21:55 UTCJul 26, 23:00 UTC1h 5m
2026-07-26 EDV5160 CVG → MSP Jul 26, 19:55 UTCJul 26, 20:55 UTC1h 0m
2026-07-26 EDV5160 CVG → MSP Jul 26, 19:50 UTCJul 26, 20:46 UTC56m
2026-07-26 EDV5160 CVG → MSP Jul 26, 18:05 UTCJul 26, 18:55 UTC50m
2026-07-26 EDV5303 ATL → TRI Jul 26, 16:30 UTCJul 26, 17:05 UTC35m
2026-07-26 EDV5086 LGA → CVG Jul 26, 14:15 UTCJul 26, 15:10 UTC55m
2026-07-26 EDV5216 JFK → PIT Jul 26, 11:20 UTCJul 26, 12:35 UTC1h 15m
2026-07-25 EDV5367 RDU → EWR Jul 25, 22:55 UTCJul 26, 00:15 UTC1h 20m
2026-07-25 EDV4816 MYR → LGA Jul 25, 20:25 UTCJul 25, 21:45 UTC1h 20m
2026-07-25 EDV4816 MYR → LGA Jul 25, 20:23 UTCJul 25, 21:44 UTC1h 21m
2026-07-25 EDV5431 BGR → JFK Jul 25, 17:25 UTCJul 25, 19:00 UTC1h 35m
2026-07-25 EDV5431 BGR → JFK Jul 25, 14:30 UTCJul 25, 16:00 UTC1h 30m
2026-07-25 EDV4652 MSP → CVG Jul 25, 11:40 UTCJul 25, 13:00 UTC1h 20m
2026-07-25 EDV4894 JFK → RDU Jul 25, 00:45 UTCJul 25, 01:50 UTC1h 5m
2026-07-24 EDV5231 LGA → PVD Jul 24, 22:00 UTCJul 24, 22:50 UTC50m
2026-07-24 EDV5343 LGA → ROC Jul 24, 19:55 UTCJul 24, 20:40 UTC45m
2026-07-24 EDV4994 LGA → GSP Jul 24, 16:55 UTCJul 24, 18:20 UTC1h 25m
2026-07-24 EDV4994 LGA → GSP Jul 24, 16:52 UTCJul 24, 18:18 UTC1h 26m
2026-07-24 EDV4994 LGA → GSP Jul 24, 12:45 UTCJul 24, 14:15 UTC1h 30m
2026-07-24 EDV5311 ROC → LGA Jul 24, 10:10 UTCJul 24, 10:55 UTC45m
2026-07-24 EDV5417 JFK → MCI Jul 24, 02:45 UTCJul 24, 03:30 UTC45m
2026-07-24 EDV5449 JFK → BWI Jul 24, 00:25 UTCJul 24, 01:10 UTC45m
2026-07-23 EDV5197 AUS → CVG Jul 23, 22:20 UTCJul 23, 23:15 UTC55m
2026-07-23 EDV5391 CHO → LGA Jul 23, 20:15 UTCJul 23, 21:10 UTC55m
2026-07-23 EDV5423 CHO → ATL Jul 23, 17:55 UTCJul 23, 18:55 UTC1h 0m
2026-07-23 EDV5423 CHO → ATL Jul 23, 17:53 UTCJul 23, 18:57 UTC1h 4m
2026-07-23 EDV5317 - Jul 23, 16:05 UTCJul 23, 16:45 UTC40m
2026-07-23 EDV4983 - Jul 23, 13:05 UTCJul 23, 14:45 UTC1h 40m
2026-07-23 EDV4948 FAR → MSP Jul 23, 10:05 UTCJul 23, 11:30 UTC1h 25m
2026-07-23 EDV4948 FAR → MSP Jul 23, 10:03 UTCJul 23, 11:24 UTC1h 21m
2026-07-22 EDV4929 BOS → MKE Jul 22, 23:20 UTCJul 23, 00:55 UTC1h 35m
2026-07-22 EDV5166 LGA → CHO Jul 22, 21:00 UTCJul 22, 22:00 UTC1h 0m
2026-07-22 EDV5094 PWM → JFK Jul 22, 18:15 UTCJul 22, 19:15 UTC1h 0m
2026-07-22 EDV4956 - Jul 22, 15:40 UTCJul 22, 16:45 UTC1h 5m
2026-07-22 EDV4648 LEX → ATL Jul 22, 00:00 UTCJul 22, 02:10 UTC2h 10m
2026-07-21 EDV5230 LGA → CHS Jul 21, 12:20 UTCJul 21, 14:20 UTC2h 0m
2026-07-21 EDV4648 LEX → ATL Jul 21, 00:10 UTCJul 21, 02:30 UTC2h 20m
2026-07-20 EDV5408 RIC → BOS Jul 20, 20:35 UTCJul 20, 23:00 UTC2h 25m
2026-07-20 EDV5483 - Jul 20, 16:30 UTCJul 20, 18:20 UTC1h 50m
2026-07-20 EDV5483 - Jul 20, 13:15 UTCJul 20, 15:10 UTC1h 55m
2026-07-20 EDV4909 - Jul 20, 03:15 UTCJul 20, 05:10 UTC1h 55m
2026-07-20 EDV4909 BNA → JFK Jul 20, 03:13 UTCJul 20, 05:07 UTC1h 54m
2026-07-20 EDV4909 - Jul 20, 01:05 UTCJul 20, 01:50 UTC45m
2026-07-19 EDV4909 - Jul 19, 20:30 UTCJul 19, 22:50 UTC2h 20m
2026-07-19 EDV5015 - Jul 19, 17:10 UTCJul 19, 18:35 UTC1h 25m
2026-07-19 EDV5015 - Jul 19, 13:50 UTCJul 19, 15:20 UTC1h 30m
2026-07-18 EDV5553 ATL → LGA Jul 18, 12:10 UTCJul 18, 13:30 UTC1h 20m
2026-07-17 EDV5554 - Jul 17, 17:20 UTCJul 17, 20:40 UTC3h 20m
2026-07-17 EDV5554 YHZ → DTW Jul 17, 17:14 UTCJul 17, 20:36 UTC3h 22m
2026-07-17 EDV5488 - Jul 17, 00:45 UTCJul 17, 01:59 UTC1h 15m

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 N933XJ page for operator, model, and routing details .

Mode-S ACF2E4 frequently asked

What is Mode-S code ACF2E4?
ACF2E4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N933XJ.
Where is Mode-S ACF2E4 registered?
Mode-S code ACF2E4 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 ACF2E4 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 23:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACF2E4, octal 53171344, decimal 11,334,372.
What flights does ACF2E4 operate?
Mode-S ACF2E4 has broadcast 20 distinct callsigns, including EDV5091, EDV5059, EDV5483, EDV4955, EDV5450.