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sensors Mode-S transponder

A72179

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N559GJ · BOMBARDIER Regional Jet CRJ-700 · operated by UNITED AIRLINES INC

Hex
A72179
Octal
51620571
Decimal
10,953,081
Country
US
Tail
N559GJ
Type
CRJ7
No current signal · last broadcast Jul 26, 22:15 UTC
Flights observed
681
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S A72179.

Country allocation

The ICAO 24-bit address A72179 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
GJS4536 GoJet Airlines 8 2026-06-24
GJS4513 - 8 2026-07-06
GJS4537 - 7 2026-07-18
GJS4447 - 7 2026-07-11
GJS4190 - 7 2026-07-12
GJS4578 GoJet Airlines 6 2026-07-24
GJS4549 GoJet Airlines 6 2026-07-25
GJS4521 GoJet Airlines 6 2026-07-23
GJS4501 - 6 2026-07-11
GJS4472 - 6 2026-06-29
GJS4468 - 6 2026-07-15
GJS4457 GoJet Airlines 6 2026-06-01
GJS4450 - 6 2026-06-28
GJS4440 - 6 2026-07-11
GJS4439 - 6 2026-07-11
GJS4418 GoJet Airlines 6 2026-07-24
GJS4385 - 6 2026-07-02
GJS4618 - 5 2026-06-24
GJS4615 GoJet Airlines 5 2026-07-25
GJS4611 - 5 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 GJS4194 EWR → DCA Jul 26, 22:05 UTCJul 26, 22:15 UTC10m
2026-07-26 GJS4381 STL → ORD Jul 26, 18:50 UTCJul 26, 20:10 UTC1h 20m
2026-07-26 GJS4382 EWR → DCA Jul 26, 16:40 UTCJul 26, 17:50 UTC1h 10m
2026-07-26 GJS4382 EWR → DCA Jul 26, 16:19 UTCJul 26, 18:05 UTC1h 46m
2026-07-26 GJS4516 IAD → LGA Jul 26, 14:40 UTCJul 26, 15:20 UTC40m
2026-07-26 GJS3375 RIC → EWR Jul 26, 12:45 UTCJul 26, 13:35 UTC50m
2026-07-25 GJS4527 IAD → STL Jul 25, 22:00 UTCJul 25, 23:40 UTC1h 40m
2026-07-25 GJS4549 IAD → ORF Jul 25, 19:10 UTCJul 25, 19:35 UTC25m
2026-07-25 GJS4549 IAD → ORF Jul 25, 19:16 UTCJul 25, 19:44 UTC28m
2026-07-25 GJS4535 MSN → ORD Jul 25, 17:20 UTCJul 25, 17:50 UTC30m
2026-07-25 GJS4535 MSN → ORD Jul 25, 17:20 UTCJul 25, 17:54 UTC34m
2026-07-25 GJS4485 EWR → DCA Jul 25, 14:40 UTCJul 25, 15:35 UTC55m
2026-07-25 GJS4615 TYS → ORD Jul 25, 12:40 UTCJul 25, 13:30 UTC50m
2026-07-25 GJS4615 TYS → ORD Jul 25, 12:46 UTCJul 25, 13:24 UTC38m
2026-07-24 GJS4455 GSO → EWR Jul 24, 23:40 UTCJul 25, 00:45 UTC1h 5m
2026-07-24 GJS4418 DCA → EWR Jul 24, 21:30 UTCJul 24, 22:40 UTC1h 10m
2026-07-24 GJS4549 IAD → ORF Jul 24, 19:20 UTCJul 24, 19:45 UTC25m
2026-07-24 GJS4535 MSN → ORD Jul 24, 17:40 UTCJul 24, 18:05 UTC25m
2026-07-24 GJS4504 ILM → EWR Jul 24, 15:10 UTCJul 24, 16:15 UTC1h 5m
2026-07-24 GJS4504 ILM → EWR Jul 24, 14:53 UTCJul 24, 16:14 UTC1h 21m
2026-07-24 GJS4492 DCA → EWR Jul 24, 12:55 UTCJul 24, 14:00 UTC1h 5m
2026-07-24 GJS4578 PHL → IAD Jul 24, 10:25 UTCJul 24, 11:20 UTC55m
2026-07-24 GJS4394 EWR → DCA Jul 24, 03:15 UTCJul 24, 04:00 UTC45m
2026-07-24 GJS4422 CLT → EWR Jul 24, 00:05 UTCJul 24, 01:05 UTC1h 0m
2026-07-23 GJS4521 GSO → ORD Jul 23, 21:55 UTCJul 23, 23:00 UTC1h 5m
2026-07-23 GJS4521 GSO → ORD Jul 23, 21:48 UTCJul 23, 22:58 UTC1h 10m
2026-07-23 GJS4521 GSO → ORD Jul 23, 19:15 UTCJul 23, 20:10 UTC55m
2026-07-23 GJS4485 EWR → DCA Jul 23, 17:20 UTCJul 23, 18:15 UTC55m
2026-07-23 GJS4476 RIC → EWR Jul 23, 14:45 UTCJul 23, 15:35 UTC50m
2026-07-23 GJS4476 RIC → EWR Jul 23, 14:42 UTCJul 23, 15:39 UTC57m
2026-07-23 GJS4615 TYS → ORD Jul 23, 13:10 UTCJul 23, 13:55 UTC45m
2026-07-23 GJS4578 PHL → IAD Jul 23, 10:45 UTCJul 23, 11:40 UTC55m
2026-07-23 GJS4394 EWR → DCA Jul 23, 03:30 UTCJul 23, 04:20 UTC50m
2026-07-23 GJS4422 CLT → EWR Jul 23, 01:15 UTCJul 23, 02:10 UTC55m
2026-07-22 GJS4521 GSO → ORD Jul 22, 23:15 UTCJul 23, 00:20 UTC1h 5m
2026-07-22 GJS4389 EWR → ILM Jul 22, 19:45 UTCJul 22, 21:05 UTC1h 20m
2026-07-22 GJS4476 RIC → EWR Jul 22, 17:45 UTCJul 22, 18:50 UTC1h 5m
2026-07-22 GJS4476 RIC → EWR Jul 22, 17:07 UTCJul 22, 18:51 UTC1h 44m
2026-07-22 GJS4609 - Jul 22, 15:10 UTCJul 22, 16:20 UTC1h 10m
2026-07-22 GJS4599 IAD → PVD Jul 22, 13:15 UTCJul 22, 14:10 UTC55m
2026-07-22 GJS4599 IAD → PVD Jul 22, 12:51 UTCJul 22, 14:11 UTC1h 20m
2026-07-20 GJS4505 STL → EWR Jul 20, 18:45 UTCJul 20, 19:35 UTC50m
2026-07-20 GJS4499 EWR → DCA Jul 20, 16:40 UTCJul 20, 17:25 UTC45m
2026-07-20 GJS4476 RIC → EWR Jul 20, 14:30 UTCJul 20, 15:20 UTC50m
2026-07-20 GJS4615 TYS → ORD Jul 20, 12:40 UTCJul 20, 13:35 UTC55m
2026-07-20 GJS4615 TYS → ORD Jul 20, 12:46 UTCJul 20, 13:45 UTC59m
2026-07-19 GJS4545 ORD → MLI Jul 19, 19:40 UTCJul 19, 20:50 UTC1h 10m
2026-07-19 GJS4424 EWR → CVG Jul 19, 17:30 UTCJul 19, 18:35 UTC1h 5m
2026-07-19 GJS4424 EWR → CVG Jul 19, 17:15 UTCJul 19, 18:38 UTC1h 23m
2026-07-19 GJS4506 STL → IAD Jul 19, 14:20 UTCJul 19, 15:50 UTC1h 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 N559GJ page for operator, model, and routing details .

Mode-S A72179 frequently asked

What is Mode-S code A72179?
A72179 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N559GJ.
Where is Mode-S A72179 registered?
Mode-S code A72179 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 A72179 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A72179, octal 51620571, decimal 10,953,081.
What flights does A72179 operate?
Mode-S A72179 has broadcast 20 distinct callsigns, including GJS4536, GJS4513, GJS4537, GJS4447, GJS4190.