sensors Mode-S transponder

A3845C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N3258J · operated by JETBLUE AIRWAYS CORP

Hex
A3845C
Octal
50702134
Decimal
10,716,252
Country
US
Tail
N3258J
Type
BCS3
Broadcasting now · callsign JBU2421 · 36,000 ft
Flights observed
165
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Current position

A3845C is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A3845C 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
JBU303 JetBlue Airways 6 2026-05-09
JBU932 JetBlue Airways 3 2026-05-27
JBU822 JetBlue Airways 3 2026-05-03
JBU502 JetBlue Airways 3 2026-05-09
JBU2901 JetBlue Airways 3 2026-05-10
JBU2754 JetBlue Airways 3 2026-05-26
JBU2468 JetBlue Airways 3 2026-05-25
JBU1602 JetBlue Airways 3 2026-05-10
JBU1500 JetBlue Airways 3 2026-05-28
JBU1337 JetBlue Airways 3 2026-05-28
JBU1302 - 3 2026-04-13
JBU1069 - 3 2026-04-13
JBU883 JetBlue Airways 2 2026-05-13
JBU706 JetBlue Airways 2 2026-05-08
JBU69 JetBlue Airways 2 2026-05-15
JBU641 JetBlue Airways 2 2026-04-27
JBU495 JetBlue Airways 2 2026-04-18
JBU401 JetBlue Airways 2 2026-04-15
JBU400 JetBlue Airways 2 2026-04-15
JBU359 JetBlue Airways 2 2026-04-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 JBU516 RSW → BOS May 29, 21:50 UTCMay 29, 22:50 UTC1h 0m
2026-05-29 JBU1115 BOS → DFW May 29, 19:40 UTCMay 29, 20:50 UTC1h 10m
2026-05-29 JBU1254 DCA → BOS May 29, 17:30 UTCMay 29, 18:30 UTC1h 0m
2026-05-29 JBU1055 BOS → DCA May 29, 14:55 UTCMay 29, 16:05 UTC1h 10m
2026-05-29 JBU806 LAX → SEA May 29, 11:15 UTCMay 29, 13:25 UTC2h 10m
2026-05-28 JBU1500 DAB → BOS May 28, 18:48 UTCMay 29, 16:05 UTC21h 17m
2026-05-28 JBU1499 BOS → DAB May 28, 14:57 UTCMay 29, 13:00 UTC22h 3m
2026-05-28 JBU1337 BOS → DTW May 28, 00:50 UTCMay 28, 01:00 UTC10m
2026-05-28 JBU1337 BOS → DTW May 28, 00:48 UTCMay 28, 23:00 UTC22h 12m
2026-05-27 JBU932 IAH → BOS May 27, 19:45 UTCMay 27, 23:25 UTC3h 40m
2026-05-27 JBU932 IAH → BOS May 27, 19:40 UTCMay 28, 19:00 UTC23h 20m
2026-05-27 JBU2033 BOS → IAH May 27, 14:15 UTCMay 27, 18:20 UTC4h 5m
2026-05-26 JBU782 MBJ → JFK May 26, 20:56 UTCMay 27, 18:20 UTC21h 24m
2026-05-26 JBU845 BOS → SYR May 26, 02:30 UTCMay 26, 22:59 UTC20h 30m
2026-05-26 JBU2754 DCA → BOS May 26, 00:06 UTCMay 26, 22:59 UTC22h 54m
2026-05-25 JBU204 BDA → BOS May 25, 16:24 UTCMay 26, 14:35 UTC22h 11m
2026-05-25 JBU2468 CHS → BOS May 25, 02:29 UTCMay 26, 01:00 UTC22h 31m
2026-05-24 JBU2467 BOS → CHS May 24, 23:11 UTCMay 25, 23:00 UTC23h 49m
2026-05-24 JBU2896 PUJ → BOS May 24, 16:55 UTCMay 25, 14:35 UTC21h 41m
2026-05-24 JBU2895 BOS → PUJ May 24, 11:00 UTCMay 25, 09:00 UTC22h 1m
2026-05-23 JBU993 BOS → DEN May 23, 22:55 UTCMay 23, 23:00 UTC5m
2026-05-23 JBU1500 DAB → BOS May 23, 18:45 UTCMay 23, 21:00 UTC2h 15m
2026-05-23 JBU1500 DAB → BOS May 23, 18:43 UTCMay 24, 12:50 UTC18h 7m
2026-05-23 JBU1499 BOS → DAB May 23, 14:55 UTCMay 23, 17:30 UTC2h 35m
2026-05-23 JBU1236 MSP → BOS May 23, 11:55 UTCMay 23, 13:15 UTC1h 20m
2026-05-23 JBU1337 BOS → DTW May 23, 00:50 UTCMay 23, 02:30 UTC1h 40m
2026-05-22 JBU932 IAH → BOS May 22, 19:40 UTCMay 22, 23:00 UTC3h 20m
2026-05-22 JBU2033 BOS → IAH May 22, 14:30 UTCMay 22, 18:30 UTC4h 0m
2026-05-22 JBU716 BUF → BOS May 22, 11:50 UTCMay 22, 12:50 UTC1h 0m
2026-05-21 JBU249 SAV → BOS May 21, 09:59 UTCMay 22, 01:30 UTC15h 32m
2026-05-20 JBU1138 AUS → BOS May 20, 23:51 UTCMay 21, 23:00 UTC23h 10m
2026-05-20 JBU1039 BOS → AUS May 20, 17:24 UTCMay 21, 15:40 UTC22h 17m
2026-05-20 JBU1354 DCA → BOS May 20, 00:19 UTCMay 20, 23:00 UTC22h 42m
2026-05-19 JBU519 JFK → ATL May 19, 11:51 UTCMay 20, 07:05 UTC19h 15m
2026-05-18 JBU70 PBI → JFK May 18, 15:43 UTCMay 19, 15:00 UTC23h 17m
2026-05-18 JBU1 JFK → FLL May 18, 10:10 UTCMay 19, 01:25 UTC15h 15m
2026-05-17 JBU2275 DCA → BOS May 17, 21:35 UTCMay 17, 23:45 UTC2h 10m
2026-05-17 JBU2275 DCA → BOS May 17, 21:34 UTCMay 18, 21:00 UTC23h 26m
2026-05-17 JBU2276 FLL → PHL May 17, 17:55 UTCMay 17, 20:15 UTC2h 20m
2026-05-16 JBU2367 BOS → CHS May 16, 17:35 UTCMay 17, 14:15 UTC20h 41m
2026-05-16 JBU1070 FLL → BOS May 16, 13:11 UTCMay 17, 13:01 UTC23h 50m
2026-05-16 JBU1906 TPA → FLL May 16, 11:01 UTCMay 17, 01:20 UTC14h 20m
2026-05-15 JBU69 BOS → FLL May 15, 14:49 UTCMay 16, 11:41 UTC20h 52m
2026-05-15 JBU69 BOS → FLL May 15, 14:50 UTCMay 15, 15:00 UTC10m
2026-05-15 JBU1336 DTW → BOS May 15, 11:45 UTCMay 15, 13:20 UTC1h 35m
2026-05-15 JBU1336 DTW → BOS May 15, 11:45 UTCMay 16, 11:01 UTC23h 16m
2026-05-14 JBU2011 JFK → VPS May 14, 11:16 UTCMay 15, 03:30 UTC16h 15m
2026-05-13 JBU2784 BZE → JFK May 13, 18:58 UTCMay 14, 17:00 UTC22h 3m
2026-05-13 JBU883 JFK → MCO May 13, 15:00 UTCMay 13, 17:30 UTC2h 30m
2026-05-13 JBU883 JFK → MCO May 13, 14:59 UTCMay 14, 13:01 UTC22h 2m

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 N3258J page for operator, model, and routing details .

Mode-S A3845C frequently asked

What is Mode-S code A3845C?
A3845C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N3258J.
Where is Mode-S A3845C registered?
Mode-S code A3845C 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 A3845C broadcasting right now?
Yes. Mode-S A3845C is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3845C, octal 50702134, decimal 10,716,252.
What flights does A3845C operate?
Mode-S A3845C has broadcast 20 distinct callsigns, including JBU303, JBU932, JBU822, JBU502, JBU2901.