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sensors Mode-S transponder

AC159A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N878RW · EMBRAER ERJ-170-100 · operated by DELTA AIR LINES INC

Hex
AC159A
Octal
53012632
Decimal
11,277,722
Country
US
Tail
N878RW
Type
E170
No current signal · last broadcast 6h ago
Flights observed
600
Distinct callsigns
20
Country
US
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S AC159A.

Country allocation

The ICAO 24-bit address AC159A 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
RPA5608 - 27 2026-07-13
RPA5646 - 26 2026-07-04
RPA5643 Republic Airlines 26 2026-07-03
RPA5645 - 23 2026-07-13
RPA5742 - 19 2026-06-30
RPA5830 Republic Airlines 18 2026-06-14
RPA5717 - 18 2026-06-26
RPA5686 Republic Airlines 16 2026-07-06
RPA5691 Republic Airlines 15 2026-05-30
RPA5618 Republic Airlines 14 2026-06-14
RPA5841 - 13 2026-06-24
RPA5792 - 13 2026-06-30
RPA5705 - 13 2026-06-29
RPA5694 Republic Airlines 13 2026-05-21
RPA5637 - 13 2026-06-26
RPA5590 Republic Airlines 13 2026-06-14
RPA5734 - 12 2026-07-13
RPA5729 - 12 2026-07-14
RPA5799 - 11 2026-06-29
RPA5642 Republic Airlines 11 2026-07-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 RPA5729 DCA → LEX Jul 14, 01:20 UTCJul 14, 02:20 UTC1h 0m
2026-07-13 RPA5645 - Jul 13, 22:30 UTCJul 14, 00:10 UTC1h 40m
2026-07-13 RPA5645 - Jul 13, 19:30 UTCJul 13, 21:10 UTC1h 40m
2026-07-13 RPA5608 - Jul 13, 16:10 UTCJul 13, 18:25 UTC2h 15m
2026-07-13 RPA5608 - Jul 13, 12:25 UTCJul 13, 14:35 UTC2h 10m
2026-07-13 RPA5734 LEX → DCA Jul 13, 10:10 UTCJul 13, 11:15 UTC1h 5m
2026-07-13 RPA5729 - Jul 13, 02:10 UTCJul 13, 03:15 UTC1h 5m
2026-07-12 RPA5645 MSN → DCA Jul 12, 23:40 UTCJul 13, 01:15 UTC1h 35m
2026-07-12 RPA5645 - Jul 12, 19:35 UTCJul 12, 21:15 UTC1h 40m
2026-07-12 RPA5608 - Jul 12, 16:05 UTCJul 12, 18:20 UTC2h 15m
2026-07-12 RPA5608 - Jul 12, 12:55 UTCJul 12, 15:10 UTC2h 15m
2026-07-12 RPA5734 - Jul 12, 10:10 UTCJul 12, 11:15 UTC1h 5m
2026-07-12 RPA5781 - Jul 12, 00:20 UTCJul 12, 01:10 UTC50m
2026-07-12 RPA5781 DTW → LEX Jul 12, 00:18 UTCJul 12, 01:04 UTC46m
2026-07-11 RPA5608 EWR → DTW Jul 11, 21:20 UTCJul 11, 22:40 UTC1h 20m
2026-07-11 RPA5608 - Jul 11, 18:25 UTCJul 11, 20:20 UTC1h 55m
2026-07-11 RPA5810 - Jul 11, 16:25 UTCJul 11, 16:55 UTC30m
2026-07-11 RPA5810 CMH → DTW Jul 11, 16:23 UTCJul 11, 16:55 UTC32m
2026-07-11 RPA5863 - Jul 11, 14:35 UTCJul 11, 15:10 UTC35m
2026-07-11 RPA5782 - Jul 11, 12:15 UTCJul 11, 13:05 UTC50m
2026-07-11 RPA5729 DCA → LEX Jul 11, 01:35 UTCJul 11, 02:40 UTC1h 5m
2026-07-10 RPA5645 - Jul 10, 22:35 UTCJul 11, 00:25 UTC1h 50m
2026-07-10 RPA5645 DCA → MSN Jul 10, 19:30 UTCJul 10, 21:20 UTC1h 50m
2026-07-10 RPA5608 - Jul 10, 16:05 UTCJul 10, 18:10 UTC2h 5m
2026-07-10 RPA5608 DCA → OMA Jul 10, 12:30 UTCJul 10, 14:45 UTC2h 15m
2026-07-10 RPA5734 - Jul 10, 10:10 UTCJul 10, 11:10 UTC1h 0m
2026-07-10 RPA5734 LEX → DCA Jul 10, 10:08 UTCJul 10, 11:07 UTC59m
2026-07-10 RPA5729 DCA → LEX Jul 10, 02:15 UTCJul 10, 03:15 UTC1h 0m
2026-07-09 RPA5645 - Jul 9, 23:20 UTCJul 10, 00:55 UTC1h 35m
2026-07-09 RPA5645 - Jul 9, 20:15 UTCJul 9, 22:20 UTC2h 5m
2026-07-09 RPA5608 - Jul 9, 16:05 UTCJul 9, 18:20 UTC2h 15m
2026-07-09 RPA5608 OMA → DCA Jul 9, 16:03 UTCJul 9, 18:19 UTC2h 16m
2026-07-09 RPA5608 DCA → OMA Jul 9, 12:25 UTCJul 9, 14:45 UTC2h 20m
2026-07-09 RPA5734 - Jul 9, 10:10 UTCJul 9, 11:10 UTC1h 0m
2026-07-09 RPA5729 DCA → LEX Jul 9, 01:25 UTCJul 9, 02:30 UTC1h 5m
2026-07-08 RPA5645 - Jul 8, 22:40 UTCJul 9, 00:15 UTC1h 35m
2026-07-08 RPA5645 - Jul 8, 19:40 UTCJul 8, 21:20 UTC1h 40m
2026-07-08 RPA5608 - Jul 8, 16:05 UTCJul 8, 18:20 UTC2h 15m
2026-07-08 RPA5608 - Jul 8, 12:20 UTCJul 8, 14:35 UTC2h 15m
2026-07-08 RPA5770 LGA → DCA Jul 8, 10:15 UTCJul 8, 11:00 UTC45m
2026-07-08 RPA5849 BOS → LGA Jul 8, 02:00 UTCJul 8, 02:52 UTC52m
2026-07-08 RPA5849 BOS → LGA Jul 8, 02:00 UTCJul 8, 02:50 UTC50m
2026-07-08 RPA5706 - Jul 8, 00:15 UTCJul 8, 01:00 UTC45m
2026-07-08 RPA5706 PHL → BOS Jul 8, 00:11 UTCJul 8, 01:01 UTC50m
2026-07-07 RPA5706 PHL → PHL Jul 7, 23:45 UTCJul 7, 23:55 UTC10m
2026-07-07 RPA5706 - Jul 7, 19:35 UTCJul 7, 20:30 UTC55m
2026-07-07 RPA5758 LGA → BOS Jul 7, 17:36 UTCJul 7, 18:26 UTC50m
2026-07-07 RPA5758 LGA → BOS Jul 7, 17:40 UTCJul 7, 18:25 UTC45m
2026-07-07 RPA5796 - Jul 7, 14:45 UTCJul 7, 15:40 UTC55m
2026-07-07 RPA5606 - Jul 7, 12:45 UTCJul 7, 13:20 UTC35m

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 N878RW page for operator, model, and routing details .

Mode-S AC159A frequently asked

What is Mode-S code AC159A?
AC159A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N878RW.
Where is Mode-S AC159A registered?
Mode-S code AC159A 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 AC159A broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC159A, octal 53012632, decimal 11,277,722.
What flights does AC159A operate?
Mode-S AC159A has broadcast 20 distinct callsigns, including RPA5608, RPA5646, RPA5643, RPA5645, RPA5742.