Apparatus

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sensors Mode-S transponder

AC76B6

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N902BC · EMBRAER ERJ-145 · operated by AMERICAN AIRLINES INC

Hex
AC76B6
Octal
53073266
Decimal
11,302,582
Country
US
Tail
N902BC
Type
E145
No current signal · last broadcast Apr 17, 17:15 UTC
Flights observed
32
Distinct callsigns
17
Country
US
Last broadcast
Apr 17, 17:15 UTC

Last known position

Most recent position reported by Mode-S AC76B6.

Country allocation

The ICAO 24-bit address AC76B6 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 17 distinct

Callsign Airline Flights Last seen
PDT5955 Piedmont Airlines 4 2026-04-14
PDT5952 Piedmont Airlines 3 2026-04-15
PDT9981 - 2 2026-04-17
PDT6126 - 2 2026-04-13
PDT6095 Piedmont Airlines 2 2026-04-14
PDT6010 - 2 2026-04-13
PDT6007 - 2 2026-04-12
PDT5966 Piedmont Airlines 2 2026-04-15
PDT5910 Piedmont Airlines 2 2026-04-15
PDT5901 Piedmont Airlines 2 2026-04-16
PDT5841 - 2 2026-04-13
PDT5799 Piedmont Airlines 2 2026-04-15
PDT9978 Piedmont Airlines 1 2026-04-17
PDT9977 - 1 2026-04-16
PDT5962 Piedmont Airlines 1 2026-04-15
PDT5930 Piedmont Airlines 1 2026-04-14
PDT5793 - 1 2026-04-12

Recent flights last 32

DateFlightRouteTakeoffLandingDuration
2026-04-17 PDT9978 PHL → MDT Apr 17, 15:30 UTCApr 17, 17:15 UTC1h 45m
2026-04-17 PDT9981 - Apr 17, 13:20 UTCApr 17, 14:45 UTC1h 25m
2026-04-17 PDT9981 - Apr 17, 13:00 UTCApr 17, 13:15 UTC15m
2026-04-16 PDT9977 - Apr 16, 17:44 UTCApr 16, 18:30 UTC45m
2026-04-16 PDT5901 TYS → PHL Apr 16, 03:09 UTCApr 16, 03:19 UTC10m
2026-04-16 PDT5901 TYS → PHL Apr 16, 02:16 UTCApr 16, 03:23 UTC1h 7m
2026-04-15 PDT5952 BDL → PHL Apr 15, 23:30 UTCApr 16, 00:50 UTC1h 20m
2026-04-15 PDT5952 BDL → PHL Apr 15, 21:05 UTCApr 15, 22:05 UTC1h 0m
2026-04-15 PDT5952 BDL → PHL Apr 15, 20:50 UTCApr 15, 21:00 UTC10m
2026-04-15 PDT5799 BOS → ROC Apr 15, 19:05 UTCApr 15, 19:15 UTC10m
2026-04-15 PDT5799 BOS → ROC Apr 15, 17:40 UTCApr 15, 17:55 UTC15m
2026-04-15 PDT5962 PHL → MHT Apr 15, 13:55 UTCApr 15, 14:45 UTC49m
2026-04-15 PDT5910 PHL → BGR Apr 15, 11:00 UTCApr 15, 11:15 UTC15m
2026-04-15 PDT5910 PHL → BGR Apr 15, 10:10 UTCApr 15, 10:55 UTC45m
2026-04-15 PDT5966 GRR → PHL Apr 15, 02:55 UTCApr 15, 03:25 UTC30m
2026-04-15 PDT5966 GRR → PHL Apr 15, 02:29 UTCApr 15, 03:24 UTC55m
2026-04-14 PDT5955 HTS → CLT Apr 14, 22:55 UTCApr 14, 23:55 UTC1h 0m
2026-04-14 PDT5955 HTS → CLT Apr 14, 22:30 UTCApr 14, 22:50 UTC20m
2026-04-14 PDT5955 HTS → CLT Apr 14, 20:55 UTCApr 14, 21:15 UTC20m
2026-04-14 PDT5955 HTS → CLT Apr 14, 20:05 UTCApr 14, 20:50 UTC45m
2026-04-14 PDT6095 SCE → PHL Apr 14, 17:25 UTCApr 14, 18:35 UTC1h 10m
2026-04-14 PDT6095 SCE → PHL Apr 14, 15:00 UTCApr 14, 16:20 UTC1h 20m
2026-04-14 PDT5930 ROC → PHL Apr 14, 11:30 UTCApr 14, 12:20 UTC50m
2026-04-13 PDT6010 - Apr 13, 22:15 UTCApr 13, 23:15 UTC1h 0m
2026-04-13 PDT6010 - Apr 13, 20:25 UTCApr 13, 21:37 UTC1h 12m
2026-04-13 PDT6126 - Apr 13, 18:10 UTCApr 13, 19:00 UTC50m
2026-04-13 PDT6126 - Apr 13, 16:25 UTCApr 13, 17:05 UTC40m
2026-04-13 PDT5841 - Apr 13, 14:35 UTCApr 13, 15:10 UTC35m
2026-04-13 PDT5841 - Apr 13, 12:55 UTCApr 13, 13:35 UTC40m
2026-04-12 PDT5793 - Apr 12, 23:55 UTCApr 13, 00:15 UTC20m
2026-04-12 PDT6007 - Apr 12, 19:14 UTCApr 12, 20:24 UTC1h 10m
2026-04-12 PDT6007 - Apr 12, 17:35 UTCApr 12, 18:25 UTC50m

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 N902BC page for operator, model, and routing details .

Mode-S AC76B6 frequently asked

What is Mode-S code AC76B6?
AC76B6 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N902BC.
Where is Mode-S AC76B6 registered?
Mode-S code AC76B6 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 AC76B6 broadcasting right now?
No active broadcast right now. Last signal was Apr 17, 17:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC76B6, octal 53073266, decimal 11,302,582.
What flights does AC76B6 operate?
Mode-S AC76B6 has broadcast 17 distinct callsigns, including PDT5955, PDT5952, PDT9981, PDT6126, PDT6095.