Apparatus

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sensors Mode-S transponder

A8712A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N643JB · AIRBUS A-320 · operated by JETBLUE AIRWAYS CORP

Hex
A8712A
Octal
52070452
Decimal
11,039,018
Country
US
Tail
N643JB
Type
A320
No current signal · last broadcast Jul 26, 22:30 UTC
Flights observed
290
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:30 UTC

Last known position

Most recent position reported by Mode-S A8712A.

Country allocation

The ICAO 24-bit address A8712A 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
JBU553 JetBlue Airways 5 2026-05-11
JBU1903 JetBlue Airways 5 2026-07-23
JBU1476 - 5 2026-07-09
JBU1457 - 4 2026-04-13
JBU1103 JetBlue Airways 4 2026-06-01
JBU959 JetBlue Airways 3 2026-06-05
JBU754 JetBlue Airways 3 2026-06-02
JBU551 - 3 2026-06-25
JBU281 JetBlue Airways 3 2026-06-19
JBU2251 JetBlue Airways 3 2026-04-15
JBU2204 JetBlue Airways 3 2026-04-14
JBU1742 - 3 2026-07-09
JBU1703 JetBlue Airways 3 2026-06-08
JBU164 JetBlue Airways 3 2026-07-24
JBU1475 - 3 2026-07-09
JBU143 JetBlue Airways 3 2026-05-15
JBU987 JetBlue Airways 2 2026-04-26
JBU967 JetBlue Airways 2 2026-04-16
JBU939 JetBlue Airways 2 2026-07-20
JBU938 JetBlue Airways 2 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JBU595 HPN → MCO Jul 26, 20:20 UTCJul 26, 22:30 UTC2h 10m
2026-07-26 JBU194 STI → EWR Jul 26, 15:55 UTCJul 26, 18:05 UTC2h 10m
2026-07-25 JBU548 TPA → HPN Jul 25, 21:23 UTCJul 26, 20:30 UTC23h 8m
2026-07-25 JBU1365 TPA → CUN Jul 25, 14:59 UTCJul 26, 14:00 UTC23h 2m
2026-07-25 JBU225 JFK → TPA Jul 25, 10:35 UTCJul 25, 23:50 UTC13h 15m
2026-07-24 JBU1039 BOS → AUS Jul 24, 20:25 UTCJul 24, 20:30 UTC5m
2026-07-24 JBU164 SRQ → JFK Jul 24, 16:30 UTCJul 24, 18:55 UTC2h 25m
2026-07-24 JBU164 SRQ → JFK Jul 24, 16:29 UTCJul 25, 12:55 UTC20h 26m
2026-07-24 JBU163 JFK → SRQ Jul 24, 12:50 UTCJul 24, 15:20 UTC2h 30m
2026-07-23 JBU1263 BOS → TVC Jul 23, 20:18 UTCJul 24, 18:30 UTC22h 12m
2026-07-23 JBU1903 JFK → SJU Jul 23, 02:55 UTCJul 23, 03:15 UTC20m
2026-07-23 JBU1903 JFK → SJU Jul 23, 00:10 UTCJul 23, 00:45 UTC35m
2026-07-23 JBU1903 JFK → SJU Jul 23, 00:05 UTCJul 23, 22:00 UTC21h 55m
2026-07-22 JBU404 SJU → JFK Jul 22, 19:45 UTCJul 22, 22:50 UTC3h 5m
2026-07-22 JBU2932 PUJ → SJU Jul 22, 01:05 UTCJul 22, 01:15 UTC10m
2026-07-22 JBU2932 PUJ → SJU Jul 22, 00:41 UTCJul 23, 00:30 UTC23h 49m
2026-07-21 JBU2931 SJU → PUJ Jul 21, 23:00 UTCJul 21, 23:15 UTC15m
2026-07-21 JBU703 JFK → SJU Jul 21, 16:35 UTCJul 21, 19:50 UTC3h 15m
2026-07-20 JBU938 SJD → JFK Jul 20, 20:14 UTCJul 21, 17:10 UTC20h 56m
2026-07-20 JBU939 JFK → SJD Jul 20, 13:45 UTCJul 21, 01:20 UTC11h 34m
2026-07-19 JBU186 JFK → ROC Jul 19, 14:38 UTCJul 20, 14:30 UTC23h 53m
2026-07-19 JBU938 SJD → JFK Jul 19, 04:12 UTCJul 20, 02:30 UTC22h 19m
2026-07-18 JBU939 JFK → SJD Jul 18, 14:16 UTCJul 19, 06:30 UTC16h 15m
2026-07-17 JBU1450 STI → FLL Jul 17, 21:02 UTCJul 18, 18:00 UTC20h 59m
2026-07-17 JBU593 EWR → FLL Jul 17, 16:24 UTCJul 17, 22:45 UTC6h 20m
2026-07-16 JBU1567 - Jul 16, 23:55 UTCJul 17, 02:45 UTC2h 50m
2026-07-16 JBU1567 - Jul 16, 23:53 UTCJul 17, 22:29 UTC22h 37m
2026-07-16 JBU1168 - Jul 16, 19:05 UTCJul 16, 21:55 UTC2h 50m
2026-07-16 JBU2143 - Jul 16, 14:55 UTCJul 16, 17:00 UTC2h 5m
2026-07-16 JBU306 - Jul 16, 10:45 UTCJul 16, 13:15 UTC2h 30m
2026-07-15 JBU2795 FLL → CUN Jul 15, 14:38 UTCJul 16, 13:20 UTC22h 42m
2026-07-14 JBU2290 FLL → DTW Jul 14, 22:40 UTCJul 15, 22:30 UTC23h 50m
2026-07-14 JBU749 FLL → CLT Jul 14, 16:20 UTCJul 15, 13:15 UTC20h 55m
2026-07-14 JBU2282 DFW → FLL Jul 14, 12:24 UTCJul 15, 01:20 UTC12h 56m
2026-07-13 JBU2448 SDQ → FLL Jul 13, 22:01 UTCJul 14, 20:30 UTC22h 30m
2026-07-13 JBU1677 JFK → JAX Jul 13, 02:36 UTCJul 14, 00:00 UTC21h 25m
2026-07-12 JBU2584 MCO → JFK Jul 12, 10:14 UTCJul 13, 04:35 UTC18h 22m
2026-07-12 JBU1727 EWR → MCO Jul 12, 01:06 UTCJul 13, 00:05 UTC23h 0m
2026-07-12 JBU1727 EWR → MCO Jul 12, 01:10 UTCJul 12, 03:20 UTC2h 10m
2026-07-11 JBU2420 - Jul 11, 20:05 UTCJul 11, 21:15 UTC1h 10m
2026-07-11 JBU2420 - Jul 11, 17:00 UTCJul 11, 17:15 UTC15m
2026-07-10 JBU1728 MCO → EWR Jul 10, 21:27 UTCJul 11, 20:30 UTC23h 4m
2026-07-10 JBU1743 - Jul 10, 02:10 UTCJul 10, 02:30 UTC20m
2026-07-10 JBU1743 JAX → SJU Jul 10, 02:10 UTCJul 10, 23:50 UTC21h 41m
2026-07-09 JBU1742 - Jul 9, 23:40 UTCJul 10, 00:50 UTC1h 10m
2026-07-09 JBU1742 - Jul 9, 21:55 UTCJul 9, 22:05 UTC10m
2026-07-09 JBU1742 SJU → JAX Jul 9, 21:50 UTCJul 10, 19:25 UTC21h 35m
2026-07-09 JBU1475 - Jul 9, 20:10 UTCJul 9, 20:30 UTC20m
2026-07-09 JBU1475 - Jul 9, 17:00 UTCJul 9, 17:45 UTC45m
2026-07-09 JBU1476 - Jul 9, 14:20 UTCJul 9, 15:20 UTC1h 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 N643JB page for operator, model, and routing details .

Mode-S A8712A frequently asked

What is Mode-S code A8712A?
A8712A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N643JB.
Where is Mode-S A8712A registered?
Mode-S code A8712A 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 A8712A broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8712A, octal 52070452, decimal 11,039,018.
What flights does A8712A operate?
Mode-S A8712A has broadcast 20 distinct callsigns, including JBU553, JBU1903, JBU1476, JBU1457, JBU1103.