Apparatus

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sensors Mode-S transponder

A8A490

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N656RW · EMBRAER ERJ-170-100 · operated by REPUBLIC AIRWAYS INC

Hex
A8A490
Octal
52122220
Decimal
11,052,176
Country
US
Tail
N656RW
Type
E170
No current signal · last broadcast Jul 26, 22:00 UTC
Flights observed
690
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:00 UTC

Last known position

Most recent position reported by Mode-S A8A490.

Country allocation

The ICAO 24-bit address A8A490 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
RPA4388 - 26 2026-07-16
RPA4438 - 25 2026-07-16
RPA4550 Republic Airlines 19 2026-07-18
RPA4556 - 17 2026-07-19
RPA4486 - 17 2026-07-10
RPA4623 - 16 2026-07-17
RPA4479 Republic Airlines 16 2026-07-24
RPA4605 Republic Airlines 15 2026-07-22
RPA4502 Republic Airlines 15 2026-07-24
RPA4387 Republic Airlines 15 2026-07-26
RPA4381 Republic Airlines 15 2026-07-26
RPA4797 - 14 2026-07-13
RPA4593 Republic Airlines 13 2026-07-24
RPA4433 Republic Airlines 13 2026-05-12
RPA4347 - 13 2026-07-02
RPA4546 - 12 2026-07-10
RPA4624 - 11 2026-07-08
RPA4404 - 11 2026-07-09
RPA4509 Republic Airlines 10 2026-07-23
RPA4410 - 9 2026-07-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RPA4528 PHL → CLE Jul 26, 21:45 UTCJul 26, 22:00 UTC15m
2026-07-26 RPA4381 BUF → ORD Jul 26, 19:25 UTCJul 26, 20:20 UTC55m
2026-07-26 RPA4381 BUF → ORD Jul 26, 17:15 UTCJul 26, 18:00 UTC45m
2026-07-26 RPA4677 DCA → ALB Jul 26, 14:50 UTCJul 26, 16:00 UTC1h 10m
2026-07-26 RPA4387 ORD → SDF Jul 26, 12:30 UTCJul 26, 13:35 UTC1h 5m
2026-07-25 RPA4497 PIT → PHL Jul 25, 19:50 UTCJul 25, 21:10 UTC1h 20m
2026-07-25 RPA4497 PIT → PHL Jul 25, 16:20 UTCJul 25, 17:35 UTC1h 15m
2026-07-25 RPA4591 DCA → LGA Jul 25, 13:15 UTCJul 25, 15:05 UTC1h 50m
2026-07-25 RPA4591 DCA → LGA Jul 25, 13:11 UTCJul 25, 15:00 UTC1h 49m
2026-07-24 RPA4593 LGA → ORF Jul 24, 22:10 UTCJul 25, 00:05 UTC1h 55m
2026-07-24 RPA4479 JFK → RDU Jul 24, 20:05 UTCJul 24, 21:10 UTC1h 5m
2026-07-24 RPA4479 JFK → RDU Jul 24, 20:03 UTCJul 24, 21:03 UTC1h 0m
2026-07-24 RPA4479 JFK → RDU Jul 24, 17:50 UTCJul 24, 18:50 UTC1h 0m
2026-07-24 RPA4502 BOS → STL Jul 24, 15:50 UTCJul 24, 16:50 UTC1h 0m
2026-07-24 RPA4502 BOS → STL Jul 24, 14:15 UTCJul 24, 15:00 UTC45m
2026-07-24 RPA4595 BOS → MEM Jul 24, 11:20 UTCJul 24, 13:10 UTC1h 50m
2026-07-23 RPA4599 JFK → CVG Jul 23, 23:55 UTCJul 24, 02:00 UTC2h 5m
2026-07-23 RPA4509 LGA → RDU Jul 23, 20:30 UTCJul 23, 22:30 UTC2h 0m
2026-07-23 RPA4509 LGA → RDU Jul 23, 20:26 UTCJul 23, 22:23 UTC1h 57m
2026-07-23 RPA4509 LGA → RDU Jul 23, 17:10 UTCJul 23, 19:30 UTC2h 20m
2026-07-23 RPA4373 BOS → LGA Jul 23, 15:05 UTCJul 23, 15:50 UTC45m
2026-07-23 RPA4373 LGA → BOS Jul 23, 13:25 UTCJul 23, 14:05 UTC40m
2026-07-23 RPA4393 JFK → BOS Jul 23, 11:45 UTCJul 23, 12:20 UTC35m
2026-07-23 RPA4719 - Jul 23, 00:40 UTCJul 23, 01:35 UTC55m
2026-07-22 RPA4605 ORD → SDF Jul 22, 21:25 UTCJul 22, 23:10 UTC1h 45m
2026-07-22 RPA4605 ORD → SDF Jul 22, 18:30 UTCJul 22, 20:15 UTC1h 45m
2026-07-21 RPA4591 DCA → LGA Jul 21, 13:40 UTCJul 21, 16:00 UTC2h 20m
2026-07-20 RPA4593 LGA → ORF Jul 20, 22:40 UTCJul 21, 00:45 UTC2h 5m
2026-07-20 RPA4593 LGA → ORF Jul 20, 22:40 UTCJul 21, 00:50 UTC2h 10m
2026-07-20 RPA4479 - Jul 20, 20:00 UTCJul 20, 20:55 UTC55m
2026-07-20 RPA4479 PIT → LGA Jul 20, 19:55 UTCJul 20, 20:53 UTC58m
2026-07-20 RPA4579 ATL → LGA Jul 20, 14:45 UTCJul 20, 15:40 UTC55m
2026-07-20 RPA4542 YYZ → LGA Jul 20, 11:40 UTCJul 20, 12:45 UTC1h 5m
2026-07-19 RPA4556 LGA → YYZ Jul 19, 19:10 UTCJul 19, 20:10 UTC1h 0m
2026-07-19 RPA4373 BOS → LGA Jul 19, 16:48 UTCJul 19, 17:34 UTC46m
2026-07-19 RPA4373 BOS → LGA Jul 19, 16:50 UTCJul 19, 17:40 UTC50m
2026-07-19 RPA9930 SDF → LGA Jul 19, 13:45 UTCJul 19, 14:50 UTC1h 5m
2026-07-18 RPA4381 - Jul 18, 22:05 UTCJul 18, 22:25 UTC20m
2026-07-18 RPA4381 - Jul 18, 21:35 UTCJul 18, 22:25 UTC50m
2026-07-18 RPA4381 LGA → CHO Jul 18, 21:00 UTCJul 18, 21:46 UTC46m
2026-07-18 RPA4550 YUL → LGA Jul 18, 14:40 UTCJul 18, 15:35 UTC55m
2026-07-18 RPA4550 YUL → LGA Jul 18, 12:35 UTCJul 18, 13:30 UTC55m
2026-07-17 RPA4423 LGA → ILM Jul 17, 22:15 UTCJul 17, 23:39 UTC1h 25m
2026-07-17 RPA4423 LGA → ILM Jul 17, 19:40 UTCJul 17, 21:10 UTC1h 30m
2026-07-17 RPA4623 YYZ → LGA Jul 17, 17:08 UTCJul 17, 18:16 UTC1h 8m
2026-07-17 RPA4623 YYZ → LGA Jul 17, 17:09 UTCJul 17, 18:19 UTC1h 10m
2026-07-17 RPA4623 LGA → YYZ Jul 17, 14:39 UTCJul 17, 15:44 UTC1h 5m
2026-07-17 RPA4377 BOS → LGA Jul 17, 12:15 UTCJul 17, 13:00 UTC45m
2026-07-17 RPA4377 LGA → BOS Jul 17, 10:10 UTCJul 17, 10:44 UTC35m
2026-07-16 RPA4438 YYZ → LGA Jul 16, 23:47 UTCJul 17, 00:41 UTC54m

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 N656RW page for operator, model, and routing details .

Mode-S A8A490 frequently asked

What is Mode-S code A8A490?
A8A490 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N656RW.
Where is Mode-S A8A490 registered?
Mode-S code A8A490 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 A8A490 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8A490, octal 52122220, decimal 11,052,176.
What flights does A8A490 operate?
Mode-S A8A490 has broadcast 20 distinct callsigns, including RPA4388, RPA4438, RPA4550, RPA4556, RPA4486.