Apparatus

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sensors Mode-S transponder

A15B4C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N187GJ · BOMBARDIER Regional Jet CRJ-900 · operated by DELTA AIR LINES INC

Hex
A15B4C
Octal
50255514
Decimal
10,574,668
Country
US
Tail
N187GJ
Type
CRJ9
No current signal · last broadcast Jul 26, 21:00 UTC
Flights observed
703
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:00 UTC

Last known position

Most recent position reported by Mode-S A15B4C.

Country allocation

The ICAO 24-bit address A15B4C 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
EDV5463 - 7 2026-06-21
EDV5304 - 7 2026-07-12
EDV4993 - 7 2026-07-13
EDV4958 - 7 2026-06-26
EDV4944 Endeavor Air 7 2026-06-08
EDV5529 Endeavor Air 6 2026-07-07
EDV5339 - 6 2026-07-07
EDV5271 - 6 2026-07-16
EDV5021 - 6 2026-06-25
EDV4962 Endeavor Air 6 2026-05-11
EDV4691 - 6 2026-07-18
EDV5554 - 5 2026-07-15
EDV5528 - 5 2026-06-30
EDV5510 Endeavor Air 5 2026-05-05
EDV5468 Endeavor Air 5 2026-06-18
EDV5450 Endeavor Air 5 2026-06-16
EDV5345 Endeavor Air 5 2026-05-15
EDV5223 Endeavor Air 5 2026-05-29
EDV5175 - 5 2026-07-13
EDV5129 - 5 2026-07-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 EDV5178 LGA → CHS Jul 26, 19:55 UTCJul 26, 21:00 UTC1h 5m
2026-07-26 EDV5045 SAV → LGA Jul 26, 17:10 UTCJul 26, 18:35 UTC1h 25m
2026-07-26 EDV5045 SAV → LGA Jul 26, 17:08 UTCJul 26, 18:27 UTC1h 19m
2026-07-25 EDV5194 LGA → BHM Jul 25, 21:52 UTCJul 25, 22:58 UTC1h 6m
2026-07-25 EDV5194 LGA → BHM Jul 25, 21:55 UTCJul 25, 23:00 UTC1h 5m
2026-07-25 EDV5499 AVL → LGA Jul 25, 18:40 UTCJul 25, 19:40 UTC1h 0m
2026-07-25 EDV5531 JFK → CLT Jul 25, 16:20 UTCJul 25, 17:15 UTC55m
2026-07-25 EDV5298 YUL → LGA Jul 25, 12:55 UTCJul 25, 14:50 UTC1h 55m
2026-07-25 EDV5298 YUL → LGA Jul 25, 12:54 UTCJul 25, 14:50 UTC1h 56m
2026-07-24 EDV4723 MKE → JFK Jul 24, 23:25 UTCJul 25, 01:15 UTC1h 50m
2026-07-24 EDV5033 MSP → MDW Jul 24, 20:05 UTCJul 24, 21:55 UTC1h 50m
2026-07-24 EDV5033 MSP → MDW Jul 24, 16:55 UTCJul 24, 19:00 UTC2h 5m
2026-07-24 EDV5193 JFK → SAV Jul 24, 14:40 UTCJul 24, 15:45 UTC1h 5m
2026-07-24 EDV5392 LGA → MEM Jul 24, 13:10 UTCJul 24, 13:35 UTC25m
2026-07-24 EDV5392 LGA → MEM Jul 24, 13:04 UTCJul 24, 13:33 UTC29m
2026-07-24 EDV5341 ROC → JFK Jul 24, 03:40 UTCJul 24, 04:55 UTC1h 15m
2026-07-19 EDV5416 - Jul 19, 00:05 UTCJul 19, 00:40 UTC35m
2026-07-18 EDV5422 - Jul 18, 20:15 UTCJul 18, 21:30 UTC1h 15m
2026-07-18 EDV5422 BTR → ATL Jul 18, 20:14 UTCJul 18, 21:25 UTC1h 11m
2026-07-18 EDV5422 ATL → BTR Jul 18, 18:05 UTCJul 18, 19:15 UTC1h 10m
2026-07-18 EDV5143 - Jul 18, 16:20 UTCJul 18, 16:50 UTC30m
2026-07-18 EDV5143 ATL → AGS Jul 18, 13:25 UTCJul 18, 13:55 UTC30m
2026-07-18 EDV4691 ABY → ATL Jul 18, 11:05 UTCJul 18, 11:45 UTC40m
2026-07-18 EDV5129 ATL → ABY Jul 18, 01:15 UTCJul 18, 01:50 UTC35m
2026-07-17 EDV4854 - Jul 17, 22:29 UTCJul 17, 23:50 UTC1h 20m
2026-07-17 EDV4854 SGF → ATL Jul 17, 22:27 UTCJul 17, 23:50 UTC1h 23m
2026-07-17 EDV4854 - Jul 17, 18:05 UTCJul 17, 19:25 UTC1h 20m
2026-07-17 EDV5091 - Jul 17, 16:15 UTCJul 17, 16:55 UTC40m
2026-07-17 EDV5091 CAE → ATL Jul 17, 16:11 UTCJul 17, 16:52 UTC41m
2026-07-17 EDV5091 - Jul 17, 14:20 UTCJul 17, 15:00 UTC40m
2026-07-17 EDV5383 - Jul 17, 11:15 UTCJul 17, 12:35 UTC1h 20m
2026-07-17 EDV5383 BMI → ATL Jul 17, 11:12 UTCJul 17, 12:29 UTC1h 17m
2026-07-17 EDV5410 ATL → BMI Jul 17, 03:14 UTCJul 17, 04:20 UTC1h 5m
2026-07-17 EDV5105 - Jul 17, 00:55 UTCJul 17, 01:49 UTC55m
2026-07-17 EDV5105 CRW → ATL Jul 17, 00:49 UTCJul 17, 01:44 UTC55m
2026-07-16 EDV5105 ATL → CRW Jul 16, 20:49 UTCJul 16, 21:45 UTC55m
2026-07-16 EDV5271 - Jul 16, 18:10 UTCJul 16, 18:44 UTC35m
2026-07-16 EDV5271 TRI → ATL Jul 16, 18:06 UTCJul 16, 18:43 UTC37m
2026-07-16 EDV5271 - Jul 16, 16:19 UTCJul 16, 17:00 UTC40m
2026-07-15 EDV5554 ABY → ATL Jul 15, 22:05 UTCJul 15, 22:40 UTC35m
2026-07-13 EDV4694 ATL → ABY Jul 13, 23:40 UTCJul 14, 00:25 UTC45m
2026-07-13 EDV5175 - Jul 13, 20:00 UTCJul 13, 21:10 UTC1h 10m
2026-07-13 EDV5175 MOB → ATL Jul 13, 19:58 UTCJul 13, 21:02 UTC1h 4m
2026-07-13 EDV5175 - Jul 13, 17:25 UTCJul 13, 18:20 UTC55m
2026-07-13 EDV4930 - Jul 13, 14:30 UTCJul 13, 16:15 UTC1h 45m
2026-07-13 EDV4930 ATL → HPN Jul 13, 11:35 UTCJul 13, 13:25 UTC1h 50m
2026-07-13 EDV4993 - Jul 13, 05:40 UTCJul 13, 06:30 UTC50m
2026-07-13 EDV5443 - Jul 13, 03:40 UTCJul 13, 04:15 UTC35m
2026-07-13 EDV5377 - Jul 13, 01:55 UTCJul 13, 02:30 UTC35m
2026-07-13 EDV5377 - Jul 13, 00:20 UTCJul 13, 00:55 UTC35m

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 N187GJ page for operator, model, and routing details .

Mode-S A15B4C frequently asked

What is Mode-S code A15B4C?
A15B4C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N187GJ.
Where is Mode-S A15B4C registered?
Mode-S code A15B4C 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 A15B4C broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A15B4C, octal 50255514, decimal 10,574,668.
What flights does A15B4C operate?
Mode-S A15B4C has broadcast 20 distinct callsigns, including EDV5463, EDV5304, EDV4993, EDV4958, EDV4944.