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sensors Mode-S transponder

A68D44

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N521GJ · BOMBARDIER Regional Jet CRJ-700 · operated by SKYWEST AIRLINES INC

Hex
A68D44
Octal
51506504
Decimal
10,915,140
Country
US
Tail
N521GJ
Type
CRJ7
No current signal · last broadcast Jul 26, 22:35 UTC
Flights observed
548
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:35 UTC

Last known position

Most recent position reported by Mode-S A68D44.

Country allocation

The ICAO 24-bit address A68D44 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
GJS4563 GoJet Airlines 9 2026-07-22
GJS4421 - 8 2026-07-19
GJS4404 GoJet Airlines 8 2026-07-18
GJS4466 GoJet Airlines 7 2026-07-25
GJS4605 GoJet Airlines 6 2026-07-23
GJS4566 - 6 2026-07-19
GJS4562 GoJet Airlines 6 2026-06-13
GJS4382 GoJet Airlines 6 2026-07-23
GJS4607 - 5 2026-07-04
GJS4601 - 5 2026-06-29
GJS4600 - 5 2026-06-26
GJS4596 - 5 2026-07-11
GJS4585 GoJet Airlines 5 2026-07-24
GJS4582 - 5 2026-06-26
GJS4579 GoJet Airlines 5 2026-07-25
GJS4540 - 5 2026-06-15
GJS4502 - 5 2026-07-18
GJS4496 - 5 2026-07-13
GJS4494 GoJet Airlines 5 2026-06-04
GJS4483 - 5 2026-07-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 GJS4445 EWR → DCA Jul 26, 21:50 UTCJul 26, 22:35 UTC45m
2026-07-26 GJS4547 IAD → PVD Jul 26, 17:05 UTCJul 26, 18:45 UTC1h 40m
2026-07-26 GJS4427 EWR → DCA Jul 26, 13:15 UTCJul 26, 14:40 UTC1h 25m
2026-07-26 GJS4532 GSO → EWR Jul 26, 10:10 UTCJul 26, 11:05 UTC55m
2026-07-25 GJS4174 DCA → EWR Jul 25, 23:50 UTCJul 26, 00:35 UTC45m
2026-07-25 GJS4174 DCA → EWR Jul 25, 23:32 UTCJul 26, 00:29 UTC57m
2026-07-25 GJS4466 AVP → EWR Jul 25, 20:10 UTCJul 25, 21:25 UTC1h 15m
2026-07-25 GJS4466 AVP → EWR Jul 25, 20:23 UTCJul 25, 21:08 UTC45m
2026-07-25 GJS4569 ORF → EWR Jul 25, 17:50 UTCJul 25, 19:00 UTC1h 10m
2026-07-25 GJS4579 RIC → EWR Jul 25, 13:52 UTCJul 25, 15:41 UTC1h 49m
2026-07-25 GJS4579 RIC → EWR Jul 25, 13:40 UTCJul 25, 15:15 UTC1h 35m
2026-07-24 GJS4412 ILM → EWR Jul 24, 23:25 UTCJul 25, 00:15 UTC50m
2026-07-24 GJS4571 ICT → ORD Jul 24, 18:05 UTCJul 24, 19:25 UTC1h 20m
2026-07-24 GJS4543 ORD → CMH Jul 24, 15:40 UTCJul 24, 16:45 UTC1h 5m
2026-07-24 GJS4585 IAD → PHL Jul 24, 12:44 UTCJul 24, 13:38 UTC54m
2026-07-24 GJS4585 IAD → PHL Jul 24, 12:25 UTCJul 24, 13:40 UTC1h 15m
2026-07-23 GJS4605 PQI → EWR Jul 23, 21:55 UTCJul 23, 23:25 UTC1h 30m
2026-07-23 GJS4381 STL → ORD Jul 23, 18:05 UTCJul 23, 19:40 UTC1h 35m
2026-07-23 GJS4381 STL → ORD Jul 23, 18:19 UTCJul 23, 19:02 UTC43m
2026-07-23 GJS4382 EWR → DCA Jul 23, 15:50 UTCJul 23, 17:00 UTC1h 10m
2026-07-23 GJS4183 EWR → RIC Jul 23, 13:17 UTCJul 23, 13:58 UTC41m
2026-07-23 GJS4183 EWR → RIC Jul 23, 13:05 UTCJul 23, 13:55 UTC50m
2026-07-22 GJS3395 PQI → RIC Jul 22, 22:48 UTCJul 22, 23:16 UTC28m
2026-07-22 GJS3395 PQI → RIC Jul 22, 22:35 UTCJul 22, 23:20 UTC45m
2026-07-22 GJS4595 EWR → RIC Jul 22, 16:00 UTCJul 22, 16:40 UTC40m
2026-07-22 GJS4595 EWR → RIC Jul 22, 16:10 UTCJul 22, 16:24 UTC14m
2026-07-22 GJS4611 EWR → ILM Jul 22, 14:05 UTCJul 22, 14:45 UTC40m
2026-07-22 GJS4611 EWR → ILM Jul 22, 14:11 UTCJul 22, 14:40 UTC29m
2026-07-22 GJS4397 GRB → ORD Jul 22, 11:40 UTCJul 22, 12:25 UTC45m
2026-07-22 GJS4610 ITH → EWR Jul 22, 03:50 UTCJul 22, 04:25 UTC35m
2026-07-22 GJS4610 ITH → EWR Jul 22, 03:30 UTCJul 22, 04:19 UTC49m
2026-07-22 GJS4563 ORD → RIC Jul 22, 01:55 UTCJul 22, 02:05 UTC10m
2026-07-22 GJS4563 ORD → RIC Jul 22, 00:25 UTCJul 22, 02:05 UTC1h 40m
2026-07-22 GJS4563 ORD → RIC Jul 22, 00:10 UTCJul 22, 01:40 UTC1h 30m
2026-07-21 GJS4519 ORD → SCE Jul 21, 22:30 UTCJul 21, 23:15 UTC45m
2026-07-21 GJS4519 ORD → SCE Jul 21, 22:23 UTCJul 21, 23:09 UTC46m
2026-07-21 GJS4429 CVG → IAD Jul 21, 20:05 UTCJul 21, 20:45 UTC40m
2026-07-21 GJS4556 - Jul 21, 17:55 UTCJul 21, 18:15 UTC20m
2026-07-21 GJS4583 - Jul 21, 15:55 UTCJul 21, 16:35 UTC40m
2026-07-21 GJS4592 - Jul 21, 11:20 UTCJul 21, 11:50 UTC30m
2026-07-20 GJS4400 - Jul 20, 22:10 UTCJul 21, 00:00 UTC1h 49m
2026-07-20 GJS4523 - Jul 20, 19:35 UTCJul 20, 21:00 UTC1h 25m
2026-07-20 GJS4525 - Jul 20, 16:40 UTCJul 20, 17:50 UTC1h 10m
2026-07-20 GJS4529 - Jul 20, 14:10 UTCJul 20, 15:10 UTC1h 0m
2026-07-20 GJS4565 - Jul 20, 11:05 UTCJul 20, 12:35 UTC1h 30m
2026-07-19 GJS4591 DCA → EWR Jul 19, 22:15 UTCJul 19, 23:40 UTC1h 25m
2026-07-19 GJS4566 - Jul 19, 19:35 UTCJul 19, 19:40 UTC5m
2026-07-19 GJS4566 - Jul 19, 18:15 UTCJul 19, 19:00 UTC45m
2026-07-19 GJS4566 SCE → ORD Jul 19, 18:26 UTCJul 19, 19:20 UTC54m
2026-07-19 GJS4568 - Jul 19, 15:50 UTCJul 19, 16:50 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 N521GJ page for operator, model, and routing details .

Mode-S A68D44 frequently asked

What is Mode-S code A68D44?
A68D44 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N521GJ.
Where is Mode-S A68D44 registered?
Mode-S code A68D44 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 A68D44 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A68D44, octal 51506504, decimal 10,915,140.
What flights does A68D44 operate?
Mode-S A68D44 has broadcast 20 distinct callsigns, including GJS4563, GJS4421, GJS4404, GJS4466, GJS4605.