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sensors Mode-S transponder

A4A0B4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N398CA · BOMBARDIER Regional Jet CRJ-700 · operated by DELTA AIR LINES INC

Hex
A4A0B4
Octal
51120264
Decimal
10,789,044
Country
US
Tail
N398CA
Type
CRJ7
Broadcasting now · callsign EDV5476 · 7,000 ft
Flights observed
684
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Current position

A4A0B4 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A4A0B4 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
EDV5244 Endeavor Air 15 2026-05-06
EDV5078 - 15 2026-06-15
EDV5473 - 13 2026-07-09
EDV5117 - 13 2026-07-13
EDV5490 - 12 2026-07-07
EDV4688 - 12 2026-07-10
EDV5258 Endeavor Air 11 2026-06-04
EDV5420 Endeavor Air 9 2026-06-05
EDV5090 - 9 2026-06-30
EDV4899 - 9 2026-07-12
EDV4714 - 9 2026-07-07
EDV5498 Endeavor Air 8 2026-06-01
EDV5464 - 8 2026-07-12
EDV5453 Endeavor Air 8 2026-06-27
EDV5304 Endeavor Air 8 2026-05-03
EDV5027 Endeavor Air 8 2026-06-01
EDV5485 Endeavor Air 7 2026-06-03
EDV5286 Endeavor Air 7 2026-05-27
EDV5274 Endeavor Air 7 2026-05-06
EDV5177 Endeavor Air 7 2026-05-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 EDV5476 - Jul 14, 16:40 UTCJul 14, 17:00 UTC20m
2026-07-14 EDV5073 YYZ → DTW Jul 14, 14:00 UTCJul 14, 14:35 UTC35m
2026-07-14 EDV5140 - Jul 14, 11:55 UTCJul 14, 12:40 UTC45m
2026-07-14 EDV4885 - Jul 14, 09:45 UTCJul 14, 10:10 UTC25m
2026-07-14 EDV4880 - Jul 14, 04:20 UTCJul 14, 04:45 UTC25m
2026-07-14 EDV4880 DTW → GRR Jul 14, 04:18 UTCJul 14, 04:42 UTC24m
2026-07-14 EDV5034 - Jul 14, 02:30 UTCJul 14, 03:10 UTC40m
2026-07-14 EDV5034 IND → DTW Jul 14, 02:27 UTCJul 14, 03:12 UTC45m
2026-07-14 EDV5034 - Jul 14, 00:50 UTCJul 14, 01:30 UTC40m
2026-07-13 EDV5117 - Jul 13, 22:20 UTCJul 13, 23:50 UTC1h 30m
2026-07-13 EDV5117 - Jul 13, 18:05 UTCJul 13, 19:15 UTC1h 10m
2026-07-13 EDV4875 - Jul 13, 16:20 UTCJul 13, 17:05 UTC45m
2026-07-13 EDV4875 IND → DTW Jul 13, 16:18 UTCJul 13, 17:02 UTC44m
2026-07-13 EDV4875 - Jul 13, 14:30 UTCJul 13, 15:15 UTC45m
2026-07-13 EDV5414 - Jul 13, 11:10 UTCJul 13, 12:30 UTC1h 20m
2026-07-13 EDV5253 MSP → DSM Jul 13, 01:15 UTCJul 13, 01:55 UTC40m
2026-07-12 EDV5017 - Jul 12, 22:30 UTCJul 13, 00:05 UTC1h 35m
2026-07-12 EDV5017 MSP → SDF Jul 12, 19:50 UTCJul 12, 21:15 UTC1h 25m
2026-07-12 EDV4899 - Jul 12, 17:15 UTCJul 12, 18:01 UTC45m
2026-07-12 EDV4899 - Jul 12, 15:35 UTCJul 12, 16:10 UTC35m
2026-07-12 EDV5464 - Jul 12, 12:45 UTCJul 12, 13:50 UTC1h 5m
2026-07-12 EDV5464 - Jul 12, 11:30 UTCJul 12, 12:40 UTC1h 10m
2026-07-11 EDV5518 MSP → ORF Jul 11, 21:00 UTCJul 11, 23:20 UTC2h 20m
2026-07-11 EDV4951 - Jul 11, 16:45 UTCJul 11, 17:30 UTC45m
2026-07-11 EDV4951 MSP → ATW Jul 11, 14:45 UTCJul 11, 15:25 UTC40m
2026-07-11 EDV5248 - Jul 11, 13:00 UTCJul 11, 13:45 UTC45m
2026-07-11 EDV5290 - Jul 11, 04:45 UTCJul 11, 05:25 UTC40m
2026-07-11 EDV4713 - Jul 11, 02:30 UTCJul 11, 03:30 UTC1h 0m
2026-07-11 EDV4713 MDW → MSP Jul 11, 02:30 UTCJul 11, 03:26 UTC56m
2026-07-11 EDV4677 - Jul 11, 01:00 UTCJul 11, 01:45 UTC45m
2026-07-11 EDV4677 DTW → MDW Jul 11, 00:56 UTCJul 11, 01:40 UTC44m
2026-07-10 EDV4980 YYZ → DTW Jul 10, 22:45 UTCJul 10, 23:30 UTC45m
2026-07-10 EDV5406 - Jul 10, 20:45 UTCJul 10, 21:25 UTC40m
2026-07-10 EDV4688 - Jul 10, 18:45 UTCJul 10, 19:35 UTC50m
2026-07-10 EDV4688 MDW → DTW Jul 10, 18:41 UTCJul 10, 19:31 UTC50m
2026-07-10 EDV4688 - Jul 10, 16:55 UTCJul 10, 17:45 UTC50m
2026-07-10 EDV4674 - Jul 10, 15:00 UTCJul 10, 15:40 UTC40m
2026-07-10 EDV4674 MDW → DTW Jul 10, 14:57 UTCJul 10, 15:37 UTC40m
2026-07-10 EDV4712 MSP → MDW Jul 10, 13:10 UTCJul 10, 14:10 UTC1h 0m
2026-07-10 EDV4712 MSP → MDW Jul 10, 13:07 UTCJul 10, 14:00 UTC53m
2026-07-10 EDV4995 - Jul 10, 11:10 UTCJul 10, 11:55 UTC45m
2026-07-10 EDV4920 MSP → ATW Jul 10, 06:25 UTCJul 10, 07:05 UTC40m
2026-07-10 EDV4920 MSP → ATW Jul 10, 06:23 UTCJul 10, 07:04 UTC41m
2026-07-10 EDV4899 - Jul 10, 04:55 UTCJul 10, 05:40 UTC45m
2026-07-10 EDV5290 MSP → CID Jul 10, 03:20 UTCJul 10, 04:00 UTC40m
2026-07-10 EDV4713 - Jul 10, 01:10 UTCJul 10, 02:15 UTC1h 5m
2026-07-09 EDV4677 - Jul 9, 22:30 UTCJul 9, 23:00 UTC30m
2026-07-09 EDV4677 DTW → MDW Jul 9, 22:26 UTCJul 9, 23:12 UTC46m
2026-07-09 EDV5456 - Jul 9, 20:05 UTCJul 9, 20:55 UTC50m
2026-07-09 EDV5446 DTW → CVG Jul 9, 18:20 UTCJul 9, 19:00 UTC40m

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 N398CA page for operator, model, and routing details .

Mode-S A4A0B4 frequently asked

What is Mode-S code A4A0B4?
A4A0B4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N398CA.
Where is Mode-S A4A0B4 registered?
Mode-S code A4A0B4 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 A4A0B4 broadcasting right now?
Yes. Mode-S A4A0B4 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4A0B4, octal 51120264, decimal 10,789,044.
What flights does A4A0B4 operate?
Mode-S A4A0B4 has broadcast 20 distinct callsigns, including EDV5244, EDV5078, EDV5473, EDV5117, EDV5490.