sensors Mode-S transponder

ADC5FF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N987JT · AIRBUS A-321 · operated by JETBLUE AIRWAYS CORP

Hex
ADC5FF
Octal
53342777
Decimal
11,388,415
Country
US
Tail
N987JT
Type
A321
No current signal · last broadcast 42m ago
Flights observed
140
Distinct callsigns
20
Country
US
Last broadcast
42m ago

Last known position

Most recent position reported by Mode-S ADC5FF.

Country allocation

The ICAO 24-bit address ADC5FF 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

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 JBU316 ATL → BOS May 29, 16:15 UTCMay 29, 21:30 UTC5h 15m
2026-05-29 JBU316 ATL → BOS May 29, 16:14 UTCMay 30, 05:10 UTC12h 57m
2026-05-29 JBU277 FLL → SFO May 29, 04:20 UTCMay 29, 10:00 UTC5h 40m
2026-05-28 JBU957 ALB → FLL May 28, 11:37 UTCMay 29, 09:45 UTC22h 8m
2026-05-27 JBU777 BOS → LAS May 27, 22:11 UTCMay 28, 21:45 UTC23h 34m
2026-05-27 JBU777 BOS → LAS May 27, 22:15 UTCMay 28, 03:35 UTC5h 20m
2026-05-26 JBU2348 LAS → JFK May 26, 14:39 UTCMay 27, 08:40 UTC18h 2m
2026-05-26 JBU711 JFK → LAS May 26, 02:10 UTCMay 26, 07:10 UTC5h 0m
2026-05-26 JBU711 JFK → LAS May 26, 02:07 UTCMay 27, 01:44 UTC23h 38m
2026-05-25 JBU216 LGB → JFK May 25, 19:10 UTCMay 26, 00:19 UTC5h 10m
2026-05-25 JBU1190 SAN → JFK May 25, 03:39 UTCMay 26, 00:24 UTC20h 46m
2026-05-24 JBU116 JFK → SYR May 24, 13:22 UTCMay 25, 11:45 UTC22h 24m
2026-05-24 JBU515 BOS → RSW May 24, 02:30 UTCMay 24, 23:46 UTC21h 16m
2026-05-24 JBU515 BOS → RSW May 24, 02:30 UTCMay 24, 08:15 UTC5h 45m
2026-05-23 JBU16 SFO → JFK May 23, 05:35 UTCMay 23, 10:35 UTC5h 0m
2026-05-23 JBU16 SFO → JFK May 23, 05:32 UTCMay 24, 03:45 UTC22h 13m
2026-05-22 JBU415 JFK → SFO May 22, 21:05 UTCMay 23, 02:45 UTC5h 39m
2026-05-21 JBU324 LAX → JFK May 21, 05:53 UTCMay 22, 01:30 UTC19h 38m
2026-05-20 JBU816 SFO → JFK May 20, 14:08 UTCMay 21, 10:40 UTC20h 33m
2026-05-20 JBU333 BOS → SFO May 20, 00:45 UTCMay 20, 23:45 UTC23h 1m
2026-05-20 JBU333 BOS → SFO May 20, 00:50 UTCMay 20, 07:20 UTC6h 31m
2026-05-19 JBU278 SFO → FLL May 19, 18:10 UTCMay 19, 22:50 UTC4h 40m
2026-05-19 JBU2677 BOS → LAS May 19, 11:05 UTCMay 19, 16:30 UTC5h 25m
2026-05-18 JBU920 SAN → BOS May 18, 18:45 UTCMay 18, 23:50 UTC5h 5m
2026-05-18 JBU920 SAN → BOS May 18, 18:45 UTCMay 19, 17:45 UTC23h 0m
2026-05-18 JBU289 JFK → SAN May 18, 11:00 UTCMay 18, 16:25 UTC5h 25m
2026-05-17 JBU487 BOS → LAX May 17, 18:10 UTCMay 17, 23:55 UTC5h 45m
2026-05-17 JBU487 BOS → LAX May 17, 18:07 UTCMay 18, 17:45 UTC23h 39m
2026-05-16 JBU808 SJU → BOS May 16, 22:20 UTCMay 17, 00:15 UTC1h 55m
2026-05-16 JBU808 SJU → BOS May 16, 20:45 UTCMay 16, 21:00 UTC15m
2026-05-16 JBU808 SJU → BOS May 16, 18:55 UTCMay 16, 19:20 UTC25m
2026-05-16 JBU807 BOS → SAV May 16, 14:01 UTCMay 16, 17:30 UTC3h 30m
2026-05-16 JBU2120 SAN → BOS May 16, 03:40 UTCMay 16, 08:41 UTC5h 1m
2026-05-15 JBU19 BOS → SAN May 15, 20:10 UTCMay 16, 01:45 UTC5h 35m
2026-05-15 JBU640 CLE → BOS May 15, 17:15 UTCMay 15, 18:40 UTC1h 25m
2026-05-15 JBU641 BOS → CLE May 15, 13:50 UTCMay 15, 15:10 UTC1h 19m
2026-05-15 JBU2178 LAS → BOS May 15, 04:50 UTCMay 15, 09:35 UTC4h 45m
2026-05-14 JBU2077 LGA → FLL May 14, 21:30 UTCMay 15, 02:30 UTC5h 0m
2026-05-14 JBU434 SFO → BOS May 14, 14:15 UTCMay 14, 19:45 UTC5h 30m
2026-05-14 JBU2615 JFK → SFO May 14, 01:25 UTCMay 14, 07:00 UTC5h 35m
2026-05-13 JBU290 SAN → JFK May 13, 17:40 UTCMay 13, 22:45 UTC5h 5m
2026-05-13 JBU919 JFK → ATL May 13, 10:20 UTCMay 13, 16:05 UTC5h 45m
2026-05-12 JBU178 LAS → BOS May 12, 21:40 UTCMay 13, 02:05 UTC4h 25m
2026-05-12 JBU2577 BOS → LAS May 12, 14:20 UTCMay 12, 19:50 UTC5h 30m
2026-05-12 JBU2120 SAN → BOS May 12, 03:35 UTCMay 12, 08:35 UTC5h 0m
2026-05-11 JBU19 BOS → SAN May 11, 20:15 UTCMay 11, 22:35 UTC2h 19m
2026-05-10 JBU278 SFO → FLL May 10, 18:39 UTCMay 10, 23:15 UTC4h 35m
2026-05-10 JBU2677 BOS → LAS May 10, 11:15 UTCMay 10, 16:34 UTC5h 20m
2026-05-08 JBU920 SAN → BOS May 8, 18:10 UTCMay 8, 23:00 UTC4h 50m
2026-05-08 JBU289 JFK → SAN May 8, 11:05 UTCMay 8, 16:35 UTC5h 30m

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 N987JT page for operator, model, and routing details .

Mode-S ADC5FF frequently asked

What is Mode-S code ADC5FF?
ADC5FF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N987JT.
Where is Mode-S ADC5FF registered?
Mode-S code ADC5FF 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 ADC5FF broadcasting right now?
No active broadcast right now. Last signal was 42m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ADC5FF, octal 53342777, decimal 11,388,415.
What flights does ADC5FF operate?
Mode-S ADC5FF has broadcast 20 distinct callsigns, including JBU277, JBU988, JBU416, JBU101, JBU957.