Apparatus

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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 Jul 26, 22:30 UTC
Flights observed
682
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:30 UTC

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
RPA5841 Republic Airlines 22 2026-07-26
RPA5830 Republic Airlines 19 2026-07-21
RPA5742 - 19 2026-06-30
RPA5717 - 18 2026-06-26
RPA5691 Republic Airlines 16 2026-07-24
RPA5686 Republic Airlines 16 2026-07-06
RPA5642 Republic Airlines 15 2026-07-20
RPA5618 Republic Airlines 15 2026-07-21
RPA5734 - 14 2026-07-14
RPA5590 Republic Airlines 14 2026-07-21
RPA5792 - 13 2026-06-30
RPA5705 - 13 2026-06-29
RPA5694 Republic Airlines 13 2026-05-21
RPA5637 - 13 2026-06-26
RPA5791 Republic Airlines 12 2026-07-25
RPA5729 - 12 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RPA5675 ORD → BOS Jul 26, 21:45 UTCJul 26, 22:30 UTC45m
2026-07-26 RPA5675 ORD → BOS Jul 26, 18:40 UTCJul 26, 19:55 UTC1h 15m
2026-07-26 RPA5841 LGA → BOS Jul 26, 16:40 UTCJul 26, 17:20 UTC40m
2026-07-26 RPA5841 LGA → BOS Jul 26, 14:25 UTCJul 26, 14:55 UTC30m
2026-07-26 RPA5806 BOS → LGA Jul 26, 11:35 UTCJul 26, 13:05 UTC1h 30m
2026-07-25 RPA5661 BOS → LGA Jul 25, 20:11 UTCJul 25, 21:47 UTC1h 36m
2026-07-25 RPA5661 BOS → LGA Jul 25, 20:15 UTCJul 25, 21:50 UTC1h 35m
2026-07-25 RPA5602 BOS → JFK Jul 25, 17:40 UTCJul 25, 18:40 UTC1h 0m
2026-07-25 RPA5602 BOS → JFK Jul 25, 17:35 UTCJul 25, 18:34 UTC59m
2026-07-25 RPA5602 BOS → JFK Jul 25, 15:25 UTCJul 25, 16:20 UTC55m
2026-07-25 RPA5797 JAX → BOS Jul 25, 11:15 UTCJul 25, 13:05 UTC1h 50m
2026-07-25 RPA5791 DCA → LGA Jul 25, 00:35 UTCJul 25, 02:35 UTC2h 0m
2026-07-24 RPA5675 ORD → BOS Jul 24, 21:50 UTCJul 24, 23:10 UTC1h 20m
2026-07-24 RPA5675 ORD → BOS Jul 24, 21:48 UTCJul 24, 23:07 UTC1h 19m
2026-07-24 RPA5675 ORD → BOS Jul 24, 18:45 UTCJul 24, 20:00 UTC1h 15m
2026-07-24 RPA5841 LGA → BOS Jul 24, 16:40 UTCJul 24, 17:20 UTC40m
2026-07-24 RPA5841 LGA → BOS Jul 24, 14:45 UTCJul 24, 15:25 UTC40m
2026-07-24 RPA5691 BOS → LGA Jul 24, 12:20 UTCJul 24, 13:35 UTC1h 15m
2026-07-24 RPA5681 BOS → EWR Jul 24, 00:05 UTCJul 24, 01:20 UTC1h 15m
2026-07-23 RPA5719 BOS → LGA Jul 23, 21:45 UTCJul 23, 22:35 UTC50m
2026-07-23 RPA5719 BOS → LGA Jul 23, 19:35 UTCJul 23, 20:20 UTC45m
2026-07-23 RPA5661 BOS → LGA Jul 23, 16:45 UTCJul 23, 18:15 UTC1h 30m
2026-07-23 RPA5661 BOS → LGA Jul 23, 16:42 UTCJul 23, 18:13 UTC1h 31m
2026-07-23 RPA5661 BOS → LGA Jul 23, 13:50 UTCJul 23, 15:25 UTC1h 35m
2026-07-23 RPA5797 JAX → BOS Jul 23, 10:30 UTCJul 23, 12:25 UTC1h 55m
2026-07-23 RPA5791 DCA → LGA Jul 23, 01:10 UTCJul 23, 03:15 UTC2h 5m
2026-07-22 RPA5675 ORD → BOS Jul 22, 21:35 UTCJul 22, 22:30 UTC55m
2026-07-22 RPA5675 ORD → BOS Jul 22, 21:34 UTCJul 22, 22:55 UTC1h 21m
2026-07-22 RPA5675 ORD → BOS Jul 22, 19:20 UTCJul 22, 20:35 UTC1h 15m
2026-07-22 RPA5841 LGA → BOS Jul 22, 17:35 UTCJul 22, 18:10 UTC35m
2026-07-22 RPA5841 LGA → BOS Jul 22, 17:31 UTCJul 22, 18:09 UTC38m
2026-07-22 RPA5841 LGA → BOS Jul 22, 16:05 UTCJul 22, 16:35 UTC30m
2026-07-22 RPA5772 BOS → MCI Jul 22, 13:45 UTCJul 22, 14:50 UTC1h 5m
2026-07-22 RPA5770 LGA → CMH Jul 22, 11:20 UTCJul 22, 12:05 UTC45m
2026-07-21 RPA5590 LGA → BOS Jul 21, 23:40 UTCJul 22, 01:15 UTC1h 35m
2026-07-21 RPA5830 CMH → BOS Jul 21, 21:00 UTCJul 21, 21:45 UTC45m
2026-07-21 RPA5817 LGA → DCA Jul 21, 17:35 UTCJul 21, 18:20 UTC45m
2026-07-21 RPA5618 CMH → BOS Jul 21, 14:15 UTCJul 21, 16:45 UTC2h 30m
2026-07-21 RPA5771 - Jul 21, 10:25 UTCJul 21, 12:25 UTC2h 0m
2026-07-20 RPA5635 LGA → IND Jul 20, 22:12 UTCJul 20, 23:51 UTC1h 39m
2026-07-20 RPA5635 LGA → IND Jul 20, 22:15 UTCJul 20, 23:50 UTC1h 35m
2026-07-20 RPA5642 BOS → IND Jul 20, 19:05 UTCJul 20, 20:45 UTC1h 40m
2026-07-20 RPA5642 BOS → IND Jul 20, 16:00 UTCJul 20, 17:35 UTC1h 35m
2026-07-20 RPA5664 MKE → BOS Jul 20, 14:20 UTCJul 20, 15:05 UTC45m
2026-07-20 RPA5664 MKE → BOS Jul 20, 12:10 UTCJul 20, 13:05 UTC55m
2026-07-19 RPA5723 - Jul 19, 19:05 UTCJul 19, 20:55 UTC1h 50m
2026-07-19 RPA5723 LGA → MKE Jul 19, 16:10 UTCJul 19, 18:10 UTC2h 0m
2026-07-19 RPA878 CMH → LGA Jul 19, 12:10 UTCJul 19, 13:55 UTC1h 45m
2026-07-19 RPA5886 CLT → PWM Jul 19, 00:45 UTCJul 19, 01:55 UTC1h 10m
2026-07-19 RPA5886 CLT → PWM Jul 19, 00:43 UTCJul 19, 01:50 UTC1h 7m

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 Jul 26, 22:30 UTC.
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, RPA5841.