Apparatus

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sensors Mode-S transponder

A1CE99

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N2151J · AIRBUS A-321neo · operated by JETBLUE AIRWAYS CORP

Hex
A1CE99
Octal
50347231
Decimal
10,604,185
Country
US
Tail
N2151J
Type
A21N
No current signal · last broadcast Jul 26, 17:30 UTC
Flights observed
268
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 17:30 UTC

Last known position

Most recent position reported by Mode-S A1CE99.

Country allocation

The ICAO 24-bit address A1CE99 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
JBU842 JetBlue Airways 19 2026-07-26
JBU841 JetBlue Airways 19 2026-07-26
JBU1079 JetBlue Airways 16 2026-07-25
JBU72 JetBlue Airways 13 2026-07-25
JBU1926 - 10 2026-07-19
JBU115 JetBlue Airways 10 2026-05-05
JBU354 JetBlue Airways 9 2026-04-26
JBU1524 JetBlue Airways 9 2026-07-22
JBU334 JetBlue Airways 8 2026-04-17
JBU1333 JetBlue Airways 8 2026-06-25
JBU1080 JetBlue Airways 8 2026-05-31
JBU1216 JetBlue Airways 7 2026-05-19
JBU353 - 6 2026-07-05
JBU1515 JetBlue Airways 6 2026-05-19
JBU133 JetBlue Airways 6 2026-04-24
JBU488 JetBlue Airways 5 2026-07-18
JBU2104 JetBlue Airways 5 2026-07-19
JBU1734 JetBlue Airways 5 2026-04-24
JBU1177 - 5 2026-07-15
JBU2233 JetBlue Airways 4 2026-04-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JBU842 DUB → JFK Jul 26, 10:35 UTCJul 26, 17:30 UTC6h 56m
2026-07-26 JBU841 JFK → SAV Jul 26, 01:17 UTCJul 26, 17:30 UTC16h 14m
2026-07-25 JBU72 SLC → JFK Jul 25, 11:44 UTCJul 26, 07:30 UTC19h 47m
2026-07-25 JBU72 SLC → JFK Jul 25, 11:44 UTCJul 26, 07:30 UTC19h 47m
2026-07-25 JBU1079 JFK → MBJ Jul 25, 03:35 UTCJul 26, 02:15 UTC22h 40m
2026-07-24 JBU8447 SRQ → BOS Jul 24, 20:56 UTCJul 25, 19:00 UTC22h 4m
2026-07-24 JBU8447 SRQ → BOS Jul 24, 21:00 UTCJul 25, 02:00 UTC5h 0m
2026-07-23 JBU823 JFK → LAX Jul 23, 23:55 UTCJul 24, 05:10 UTC5h 15m
2026-07-23 JBU842 DUB → JFK Jul 23, 12:10 UTCJul 23, 18:45 UTC6h 35m
2026-07-22 JBU190 SAN → JFK Jul 22, 20:41 UTCJul 23, 18:50 UTC22h 9m
2026-07-22 JBU1524 LAX → JFK Jul 22, 10:20 UTCJul 22, 11:45 UTC1h 25m
2026-07-22 JBU1524 LAX → JFK Jul 22, 06:45 UTCJul 23, 05:30 UTC22h 45m
2026-07-21 JBU842 DUB → JFK Jul 21, 10:38 UTCJul 22, 05:20 UTC18h 42m
2026-07-21 JBU841 JFK → SAV Jul 21, 02:07 UTCJul 22, 00:15 UTC22h 8m
2026-07-21 JBU841 JFK → SAV Jul 21, 02:10 UTCJul 21, 08:00 UTC5h 50m
2026-07-20 JBU1024 FLL → JFK Jul 20, 05:45 UTCJul 20, 10:40 UTC4h 55m
2026-07-19 JBU1926 LGW → BOS Jul 19, 12:00 UTCJul 20, 10:15 UTC22h 16m
2026-07-19 JBU2104 BOS → LGW Jul 19, 02:10 UTCJul 20, 00:15 UTC22h 6m
2026-07-18 JBU488 MCO → ORH Jul 18, 05:25 UTCJul 19, 03:35 UTC22h 11m
2026-07-17 JBU823 JFK → LAX Jul 17, 22:15 UTCJul 18, 03:25 UTC5h 11m
2026-07-17 JBU823 JFK → LAX Jul 17, 22:11 UTCJul 18, 20:10 UTC22h 0m
2026-07-17 JBU842 - Jul 17, 10:35 UTCJul 17, 17:09 UTC6h 35m
2026-07-17 JBU841 JFK → DUB Jul 17, 01:39 UTCJul 17, 07:44 UTC6h 5m
2026-07-16 JBU72 EDI → JFK Jul 16, 11:45 UTCJul 16, 18:50 UTC7h 5m
2026-07-16 JBU72 EDI → JFK Jul 16, 11:41 UTCJul 17, 07:50 UTC20h 9m
2026-07-16 JBU1079 BOS → EDI Jul 16, 02:50 UTCJul 16, 08:50 UTC6h 0m
2026-07-15 JBU1177 - Jul 15, 12:50 UTCJul 15, 17:35 UTC4h 45m
2026-07-15 JBU1177 BOS → LAS Jul 15, 12:46 UTCJul 16, 12:14 UTC23h 29m
2026-07-15 JBU1177 BOS → BOS Jul 15, 11:40 UTCJul 15, 11:45 UTC5m
2026-07-15 JBU488 - Jul 15, 05:25 UTCJul 15, 10:35 UTC5h 10m
2026-07-14 JBU842 DUB → JFK Jul 14, 10:49 UTCJul 15, 10:15 UTC23h 26m
2026-07-14 JBU841 JFK → DUB Jul 14, 01:19 UTCJul 15, 00:15 UTC22h 56m
2026-07-13 JBU842 DUB → JFK Jul 13, 10:50 UTCJul 14, 07:35 UTC20h 46m
2026-07-13 JBU842 DUB → JFK Jul 13, 10:50 UTCJul 14, 07:35 UTC20h 46m
2026-07-13 JBU841 JFK → DUB Jul 13, 02:06 UTCJul 13, 17:35 UTC15h 30m
2026-07-13 JBU841 JFK → DUB Jul 13, 02:10 UTCJul 13, 08:20 UTC6h 10m
2026-07-12 JBU841 JFK → DUB Jul 12, 02:23 UTCJul 13, 02:15 UTC23h 53m
2026-07-11 JBU887 - Jul 11, 13:50 UTCJul 11, 17:15 UTC3h 25m
2026-07-11 JBU887 JFK → SXM Jul 11, 13:50 UTCJul 12, 11:35 UTC21h 46m
2026-07-10 JBU1548 - Jul 10, 01:55 UTCJul 10, 03:00 UTC1h 5m
2026-07-09 JBU1548 LAS → BUF Jul 9, 19:15 UTCJul 9, 23:50 UTC4h 35m
2026-07-09 JBU411 JFK → LAS Jul 9, 10:55 UTCJul 9, 15:50 UTC4h 55m
2026-07-09 JBU416 - Jul 9, 02:00 UTCJul 9, 07:00 UTC5h 0m
2026-07-08 JBU1833 - Jul 8, 14:55 UTCJul 8, 20:35 UTC5h 40m
2026-07-07 JBU1926 LGW → BOS Jul 7, 13:29 UTCJul 7, 20:50 UTC7h 22m
2026-07-07 JBU1926 LGW → BOS Jul 7, 13:30 UTCJul 7, 20:30 UTC7h 0m
2026-07-07 JBU2104 BOS → LGW Jul 7, 04:45 UTCJul 7, 11:00 UTC6h 15m
2026-07-06 JBU220 - Jul 6, 21:00 UTCJul 7, 02:15 UTC5h 15m
2026-07-06 JBU219 - Jul 6, 13:15 UTCJul 6, 18:30 UTC5h 15m
2026-07-06 JBU2120 - Jul 6, 03:55 UTCJul 6, 08:55 UTC5h 0m

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 N2151J page for operator, model, and routing details .

Mode-S A1CE99 frequently asked

What is Mode-S code A1CE99?
A1CE99 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N2151J.
Where is Mode-S A1CE99 registered?
Mode-S code A1CE99 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 A1CE99 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 17:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1CE99, octal 50347231, decimal 10,604,185.
What flights does A1CE99 operate?
Mode-S A1CE99 has broadcast 20 distinct callsigns, including JBU842, JBU841, JBU1079, JBU72, JBU1926.