Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A4C98F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N4074J · AIRBUS A-321neo · operated by JETBLUE AIRWAYS CORP

Hex
A4C98F
Octal
51144617
Decimal
10,799,503
Country
US
Tail
N4074J
Type
A21N
No current signal · last broadcast 8d ago
Flights observed
171
Distinct callsigns
20
Country
US
Last broadcast
8d ago

Last known position

Most recent position reported by Mode-S A4C98F.

Country allocation

The ICAO 24-bit address A4C98F 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
JBU1621 - 17 2026-06-26
JBU1620 - 13 2026-06-26
JBU1408 JetBlue Airways 13 2026-06-28
JBU1107 JetBlue Airways 13 2026-06-30
JBU2220 JetBlue Airways 12 2026-07-01
JBU1407 JetBlue Airways 10 2026-07-04
JBU331 JetBlue Airways 9 2026-06-11
JBU33 - 9 2026-06-28
JBU20 JetBlue Airways 8 2026-06-29
JBU345 - 7 2026-07-05
JBU34 - 7 2026-07-04
JBU2261 JetBlue Airways 7 2026-06-09
JBU7 - 6 2026-06-29
JBU332 - 6 2026-06-11
JBU31 JetBlue Airways 6 2026-06-07
JBU2260 JetBlue Airways 6 2026-06-09
JBU32 JetBlue Airways 5 2026-05-31
JBU346 JetBlue Airways 4 2026-06-06
JBU8032 JetBlue Airways 3 2026-06-08
JBU8134 JetBlue Airways 2 2026-04-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-05 JBU345 BOS → BCN Jul 5, 00:33 UTCJul 5, 19:40 UTC19h 7m
2026-07-04 JBU34 - Jul 4, 09:35 UTCJul 4, 11:05 UTC1h 30m
2026-07-04 JBU34 CDG → BOS Jul 4, 09:32 UTCJul 5, 07:20 UTC21h 49m
2026-07-04 JBU1407 JFK → CDG Jul 4, 00:20 UTCJul 4, 07:00 UTC6h 40m
2026-07-02 JBU8640 BOS → PSM Jul 2, 16:45 UTCJul 2, 17:05 UTC20m
2026-07-01 JBU2220 LHR → JFK Jul 1, 07:25 UTCJul 1, 13:45 UTC6h 20m
2026-07-01 JBU2220 LHR → JFK Jul 1, 07:22 UTCJul 1, 15:05 UTC7h 44m
2026-06-30 JBU1107 JFK → LHR Jun 30, 13:05 UTCJun 30, 19:25 UTC6h 20m
2026-06-29 JBU20 LHR → JFK Jun 29, 11:10 UTCJun 29, 18:25 UTC7h 15m
2026-06-29 JBU7 - Jun 29, 02:05 UTCJun 29, 08:19 UTC6h 15m
2026-06-28 JBU1408 MIA → EWR Jun 28, 10:44 UTCJun 28, 11:45 UTC1h 0m
2026-06-28 JBU1408 MIA → EWR Jun 28, 10:41 UTCJun 29, 08:19 UTC21h 39m
2026-06-28 JBU1408 MIA → EWR Jun 28, 10:41 UTCJun 29, 08:19 UTC21h 39m
2026-06-28 JBU33 - Jun 28, 01:59 UTCJun 28, 08:14 UTC6h 15m
2026-06-26 JBU1620 BOS → LHR Jun 26, 23:10 UTCJun 27, 15:14 UTC16h 5m
2026-06-26 JBU1621 - Jun 26, 08:05 UTCJun 26, 15:10 UTC7h 5m
2026-06-26 JBU1621 LHR → BOS Jun 26, 08:02 UTCJun 27, 05:19 UTC21h 18m
2026-06-25 JBU1620 BOS → LHR Jun 25, 23:14 UTCJun 26, 05:19 UTC6h 5m
2026-06-25 JBU1621 - Jun 25, 08:09 UTCJun 25, 09:25 UTC1h 15m
2026-06-25 JBU1621 LHR → BOS Jun 25, 08:06 UTCJun 26, 05:19 UTC21h 14m
2026-06-24 JBU1620 BOS → LHR Jun 24, 23:20 UTCJun 25, 05:20 UTC6h 0m
2026-06-24 JBU8358 MBJ → EWR Jun 24, 18:25 UTCJun 24, 19:10 UTC45m
2026-06-21 JBU2220 LHR → JFK Jun 21, 07:40 UTCJun 21, 14:50 UTC7h 10m
2026-06-20 JBU1107 JFK → LHR Jun 20, 13:04 UTCJun 20, 19:34 UTC6h 30m
2026-06-19 JBU2220 LHR → JFK Jun 19, 07:25 UTCJun 19, 08:44 UTC1h 20m
2026-06-19 JBU2220 LHR → JFK Jun 19, 07:24 UTCJun 19, 14:59 UTC7h 36m
2026-06-18 JBU1107 JFK → LHR Jun 18, 13:15 UTCJun 18, 14:50 UTC1h 36m
2026-06-18 JBU1107 JFK → LHR Jun 18, 13:15 UTCJun 18, 19:45 UTC6h 30m
2026-06-17 JBU2220 LHR → JFK Jun 17, 07:35 UTCJun 17, 14:50 UTC7h 15m
2026-06-16 JBU1107 JFK → LHR Jun 16, 13:09 UTCJun 16, 19:45 UTC6h 35m
2026-06-15 JBU20 LHR → JFK Jun 15, 11:05 UTCJun 15, 18:04 UTC7h 0m
2026-06-15 JBU7 JFK → LHR Jun 15, 01:40 UTCJun 15, 08:15 UTC6h 35m
2026-06-14 JBU1408 MIA → EWR Jun 14, 11:00 UTCJun 14, 18:35 UTC7h 35m
2026-06-14 JBU33 BOS → CDG Jun 14, 01:45 UTCJun 14, 08:10 UTC6h 25m
2026-06-13 JBU1621 LHR → BOS Jun 13, 08:14 UTCJun 14, 07:45 UTC23h 32m
2026-06-12 JBU1620 BOS → LHR Jun 12, 22:54 UTCJun 13, 15:15 UTC16h 21m
2026-06-12 JBU1620 BOS → LHR Jun 12, 22:55 UTCJun 13, 05:15 UTC6h 19m
2026-06-11 JBU331 BDL → MCO Jun 11, 22:25 UTCJun 12, 05:35 UTC7h 10m
2026-06-11 JBU331 BDL → MCO Jun 11, 22:21 UTCJun 12, 16:45 UTC18h 25m
2026-06-11 JBU331 BDL → MCO Jun 11, 21:25 UTCJun 11, 21:30 UTC5m
2026-06-11 JBU332 MXP → BOS Jun 11, 08:20 UTCJun 11, 16:35 UTC8h 15m
2026-06-10 JBU331 BDL → MCO Jun 10, 22:55 UTCJun 11, 05:50 UTC6h 55m
2026-06-10 JBU332 LGA → BOS Jun 10, 09:32 UTCJun 11, 05:55 UTC20h 23m
2026-06-10 JBU332 LGA → BOS Jun 10, 09:32 UTCJun 11, 05:55 UTC20h 23m
2026-06-10 JBU331 BDL → MCO Jun 10, 00:01 UTCJun 10, 23:45 UTC23h 44m
2026-06-09 JBU2260 MAD → BOS Jun 9, 12:58 UTCJun 10, 11:45 UTC22h 47m
2026-06-09 JBU2261 LGA → PBI Jun 9, 02:55 UTCJun 10, 01:35 UTC22h 40m
2026-06-08 JBU8032 CTG → JFK Jun 8, 13:05 UTCJun 8, 13:45 UTC40m
2026-06-08 JBU8032 CTG → JFK Jun 8, 13:04 UTCJun 9, 09:25 UTC20h 21m
2026-06-08 JBU8032 CTG → JFK Jun 8, 13:04 UTCJun 9, 09:25 UTC20h 21m

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 N4074J page for operator, model, and routing details .

Mode-S A4C98F frequently asked

What is Mode-S code A4C98F?
A4C98F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N4074J.
Where is Mode-S A4C98F registered?
Mode-S code A4C98F 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 A4C98F broadcasting right now?
No active broadcast right now. Last signal was 8d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4C98F, octal 51144617, decimal 10,799,503.
What flights does A4C98F operate?
Mode-S A4C98F has broadcast 20 distinct callsigns, including JBU1621, JBU1620, JBU1408, JBU1107, JBU2220.