sensors Mode-S transponder

A768C2

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N577DN · AIRBUS A-321neo · operated by DELTA AIR LINES INC

Hex
A768C2
Octal
51664302
Decimal
10,971,330
Country
US
Tail
N577DN
Type
A21N
Broadcasting now · callsign DAL1691 · 34,000 ft
Flights observed
13
Distinct callsigns
5
Country
US
Last broadcast
1d ago

Current position

A768C2 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A768C2 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 5 distinct

Callsign Airline Flights Last seen
DAL305 - 4 2026-04-13
DAL2693 - 3 2026-04-13
DAL2069 - 3 2026-04-13
DAL834 - 2 2026-04-13
DAL482 - 1 2026-04-12

Recent flights last 13

DateFlightRouteTakeoffLandingDuration
2026-04-13 DAL305 - Apr 13, 20:20 UTCApr 13, 22:45 UTC2h 25m
2026-04-13 DAL305 - Apr 13, 16:15 UTCApr 13, 18:05 UTC1h 50m
2026-04-13 DAL305 - Apr 13, 15:50 UTCApr 13, 18:05 UTC2h 15m
2026-04-13 DAL305 - Apr 13, 15:30 UTCApr 13, 16:15 UTC45m
2026-04-13 DAL2693 - Apr 13, 12:20 UTCApr 13, 13:55 UTC1h 35m
2026-04-13 DAL2693 - Apr 13, 11:55 UTCApr 13, 13:55 UTC2h 0m
2026-04-13 DAL2693 - Apr 13, 11:40 UTCApr 13, 13:51 UTC2h 11m
2026-04-13 DAL2069 - Apr 13, 08:20 UTCApr 13, 09:40 UTC1h 20m
2026-04-13 DAL2069 - Apr 13, 07:55 UTCApr 13, 09:40 UTC1h 45m
2026-04-13 DAL2069 - Apr 13, 05:50 UTCApr 13, 08:15 UTC2h 25m
2026-04-13 DAL834 - Apr 13, 00:20 UTCApr 13, 03:55 UTC3h 35m
2026-04-12 DAL834 - Apr 12, 23:55 UTCApr 13, 03:50 UTC3h 55m
2026-04-12 DAL482 - Apr 12, 17:37 UTCApr 12, 21:52 UTC4h 15m

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 N577DN page for operator, model, and routing details .

Mode-S A768C2 frequently asked

What is Mode-S code A768C2?
A768C2 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N577DN.
Where is Mode-S A768C2 registered?
Mode-S code A768C2 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 A768C2 broadcasting right now?
Yes. Mode-S A768C2 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A768C2, octal 51664302, decimal 10,971,330.
What flights does A768C2 operate?
Mode-S A768C2 has broadcast 5 distinct callsigns, including DAL305, DAL2693, DAL2069, DAL834, DAL482.