Apparatus

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sensors Mode-S transponder

A84A17

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N633NK · AIRBUS A-320 · operated by BANK OF UTAH TRUSTEE

Hex
A84A17
Octal
52045027
Decimal
11,029,015
Country
US
Tail
N633NK
Type
A320
No current signal · last broadcast 17d ago
Flights observed
94
Distinct callsigns
20
Country
US
Last broadcast
17d ago

Last known position

Most recent position reported by Mode-S A84A17.

Country allocation

The ICAO 24-bit address A84A17 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
NKS753 Spirit Airlines 5 2026-04-28
NKS1744 Spirit Airlines 5 2026-04-28
NKS1510 Spirit Airlines 4 2026-04-23
NKS1390 Spirit Airlines 3 2026-05-01
NKS1388 Spirit Airlines 3 2026-05-01
NKS905 Spirit Airlines 2 2026-04-26
NKS833 Spirit Airlines 2 2026-04-13
NKS714 Spirit Airlines 2 2026-04-22
NKS690 Spirit Airlines 2 2026-04-20
NKS358 Spirit Airlines 2 2026-04-16
NKS2705 Spirit Airlines 2 2026-04-20
NKS2702 Spirit Airlines 2 2026-04-19
NKS2414 Spirit Airlines 2 2026-04-23
NKS2410 Spirit Airlines 2 2026-04-27
NKS2409 Spirit Airlines 2 2026-04-26
NKS2250 Spirit Airlines 2 2026-04-27
NKS1881 Spirit Airlines 2 2026-04-26
NKS1682 Spirit Airlines 2 2026-04-23
NKS1629 Spirit Airlines 2 2026-04-30
NKS1622 Spirit Airlines 2 2026-04-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-13 633NK LGA → YHM May 13, 00:50 UTCMay 13, 02:00 UTC1h 10m
2026-05-02 NKS1385 DTW → RSW May 2, 00:30 UTCMay 2, 01:40 UTC1h 10m
2026-05-01 NKS1391 BOS → TPA May 1, 22:05 UTCMay 1, 23:10 UTC1h 5m
2026-05-01 NKS1390 TPA → BOS May 1, 19:45 UTCMay 1, 20:50 UTC1h 5m
2026-05-01 NKS1390 TPA → BOS May 1, 19:37 UTCMay 1, 20:51 UTC1h 14m
2026-05-01 NKS1389 LGA → MYR May 1, 17:05 UTCMay 1, 18:15 UTC1h 10m
2026-05-01 NKS1388 FLL → ATL May 1, 14:30 UTCMay 1, 15:45 UTC1h 15m
2026-05-01 NKS1380 ORD → FLL May 1, 11:20 UTCMay 1, 12:40 UTC1h 20m
2026-05-01 NKS1385 DTW → RSW May 1, 00:30 UTCMay 1, 01:45 UTC1h 15m
2026-04-30 NKS1391 BOS → TPA Apr 30, 22:10 UTCApr 30, 23:10 UTC1h 0m
2026-04-30 NKS1390 TPA → BOS Apr 30, 20:00 UTCApr 30, 21:10 UTC1h 10m
2026-04-30 NKS1389 LGA → MYR Apr 30, 17:05 UTCApr 30, 18:25 UTC1h 20m
2026-04-30 NKS1388 FLL → ATL Apr 30, 14:35 UTCApr 30, 15:55 UTC1h 20m
2026-04-30 NKS1388 FLL → ATL Apr 30, 14:28 UTCApr 30, 15:45 UTC1h 17m
2026-04-30 NKS1380 ORD → FLL Apr 30, 11:15 UTCApr 30, 12:40 UTC1h 25m
2026-04-30 NKS1629 DTW → LGA Apr 30, 00:40 UTCApr 30, 02:00 UTC1h 20m
2026-04-28 NKS753 PHL → MCO Apr 28, 19:40 UTCApr 28, 21:19 UTC1h 40m
2026-04-28 NKS1744 PIT → RSW Apr 28, 15:10 UTCApr 28, 17:55 UTC2h 45m
2026-04-28 NKS1744 PIT → RSW Apr 28, 15:07 UTCApr 28, 17:57 UTC2h 50m
2026-04-27 NKS1743 RSW → PIT Apr 27, 23:20 UTCApr 28, 02:10 UTC2h 50m
2026-04-27 NKS3928 LGA → MIA Apr 27, 18:55 UTCApr 27, 21:55 UTC3h 0m
2026-04-27 NKS3927 MCO → LGA Apr 27, 14:45 UTCApr 27, 17:45 UTC3h 0m
2026-04-27 NKS2250 ROC → MCO Apr 27, 10:47 UTCApr 27, 13:25 UTC2h 38m
2026-04-27 NKS2250 ROC → MCO Apr 27, 10:50 UTCApr 27, 13:25 UTC2h 35m
2026-04-27 NKS2410 EWR → OAK Apr 27, 03:50 UTCApr 27, 04:50 UTC1h 0m
2026-04-27 NKS2410 EWR → OAK Apr 27, 03:48 UTCApr 27, 04:52 UTC1h 4m
2026-04-26 NKS2409 OAK → EWR Apr 26, 23:45 UTCApr 27, 01:30 UTC1h 45m
2026-04-26 NKS2409 OAK → EWR Apr 26, 23:44 UTCApr 27, 01:35 UTC1h 51m
2026-04-26 NKS2408 MYR → EWR Apr 26, 20:15 UTCApr 26, 22:35 UTC2h 20m
2026-04-26 NKS1881 PHL → FLL Apr 26, 17:05 UTCApr 26, 18:35 UTC1h 30m
2026-04-26 NKS1881 PHL → FLL Apr 26, 15:10 UTCApr 26, 15:25 UTC15m
2026-04-26 NKS880 MCO → SJU Apr 26, 10:35 UTCApr 26, 13:50 UTC3h 15m
2026-04-26 NKS905 DTW → LAX Apr 26, 03:15 UTCApr 26, 04:20 UTC1h 5m
2026-04-26 NKS905 DTW → LAX Apr 26, 03:10 UTCApr 26, 04:23 UTC1h 13m
2026-04-25 NKS1746 BOS → RSW Apr 25, 23:30 UTCApr 26, 02:00 UTC2h 30m
2026-04-25 NKS1365 MCO → IND Apr 25, 03:30 UTCApr 25, 04:50 UTC1h 20m
2026-04-25 NKS1364 SEA → LAS Apr 25, 00:50 UTCApr 25, 02:15 UTC1h 25m
2026-04-25 NKS1364 SEA → LAS Apr 25, 00:46 UTCApr 25, 02:08 UTC1h 22m
2026-04-24 NKS1376 TPA → BOS Apr 24, 21:30 UTCApr 24, 23:35 UTC2h 5m
2026-04-24 NKS1375 IAH → MCO Apr 24, 15:45 UTCApr 24, 18:20 UTC2h 35m
2026-04-24 NKS1605 SDF → LAX Apr 24, 12:15 UTCApr 24, 14:20 UTC2h 5m
2026-04-24 NKS1606 IAH → SJU Apr 24, 01:40 UTCApr 24, 04:05 UTC2h 25m
2026-04-23 NKS2414 FLL → IND Apr 23, 21:35 UTCApr 23, 23:45 UTC2h 10m
2026-04-23 NKS2414 FLL → IND Apr 23, 21:34 UTCApr 23, 23:43 UTC2h 9m
2026-04-23 NKS753 PHL → MCO Apr 23, 18:45 UTCApr 23, 20:25 UTC1h 40m
2026-04-23 NKS753 PHL → MCO Apr 23, 18:45 UTCApr 23, 20:27 UTC1h 42m
2026-04-23 NKS1744 PIT → RSW Apr 23, 14:15 UTCApr 23, 17:15 UTC3h 0m
2026-04-23 NKS1682 ACY → MYR Apr 23, 11:30 UTCApr 23, 12:55 UTC1h 25m
2026-04-23 NKS1510 MCO → IND Apr 23, 06:25 UTCApr 23, 09:55 UTC3h 30m
2026-04-22 NKS714 PIT → EWR Apr 22, 20:00 UTCApr 22, 20:45 UTC45m

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 N633NK page for operator, model, and routing details .

Mode-S A84A17 frequently asked

What is Mode-S code A84A17?
A84A17 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N633NK.
Where is Mode-S A84A17 registered?
Mode-S code A84A17 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 A84A17 broadcasting right now?
No active broadcast right now. Last signal was 17d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A84A17, octal 52045027, decimal 11,029,015.
What flights does A84A17 operate?
Mode-S A84A17 has broadcast 20 distinct callsigns, including NKS753, NKS1744, NKS1510, NKS1390, NKS1388.