Apparatus

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sensors Mode-S transponder

ABD41A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N861RW · EMBRAER ERJ-170-100 · operated by REPUBLIC AIRWAYS INC

Hex
ABD41A
Octal
52752032
Decimal
11,260,954
Country
US
Tail
N861RW
Type
E170
No current signal · last broadcast Jul 26, 20:50 UTC
Flights observed
703
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:50 UTC

Last known position

Most recent position reported by Mode-S ABD41A.

Country allocation

The ICAO 24-bit address ABD41A 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
RPA4347 - 34 2026-07-16
RPA4479 - 33 2026-07-17
RPA4591 - 28 2026-07-18
RPA4502 - 28 2026-07-17
RPA4623 - 20 2026-07-01
RPA4550 - 16 2026-07-04
RPA4546 Republic Airlines 16 2026-06-30
RPA4797 - 15 2026-07-17
RPA4377 - 15 2026-07-02
RPA4404 Republic Airlines 14 2026-07-25
RPA4593 Republic Airlines 13 2026-07-17
RPA4578 Republic Airlines 12 2026-06-29
RPA4507 Republic Airlines 12 2026-05-21
RPA4497 - 12 2026-07-16
RPA4410 - 12 2026-07-15
RPA4483 Republic Airlines 11 2026-07-26
RPA4438 - 11 2026-07-02
RPA4556 Republic Airlines 10 2026-07-26
RPA4624 Republic Airlines 9 2026-07-24
RPA4509 - 9 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RPA4556 BOS → YYZ Jul 26, 19:40 UTCJul 26, 20:45 UTC1h 5m
2026-07-26 RPA4556 BOS → YYZ Jul 26, 17:30 UTCJul 26, 18:30 UTC1h 0m
2026-07-26 RPA4483 RDU → LGA Jul 26, 15:10 UTCJul 26, 16:30 UTC1h 20m
2026-07-26 RPA4483 RDU → LGA Jul 26, 15:09 UTCJul 26, 16:17 UTC1h 8m
2026-07-26 RPA4483 RDU → LGA Jul 26, 13:05 UTCJul 26, 13:55 UTC50m
2026-07-26 RPA4670 LGA → ATL Jul 26, 10:15 UTCJul 26, 11:45 UTC1h 30m
2026-07-25 RPA4667 IND → PHL Jul 25, 20:50 UTCJul 25, 22:16 UTC1h 26m
2026-07-25 RPA4667 IND → PHL Jul 25, 20:55 UTCJul 25, 22:15 UTC1h 20m
2026-07-25 RPA4566 BDL → DCA Jul 25, 17:05 UTCJul 25, 19:15 UTC2h 10m
2026-07-25 RPA4566 BDL → DCA Jul 25, 13:40 UTCJul 25, 16:05 UTC2h 25m
2026-07-25 RPA4424 PVD → DCA Jul 25, 11:15 UTCJul 25, 12:15 UTC1h 0m
2026-07-25 RPA4424 PVD → DCA Jul 25, 11:15 UTCJul 25, 12:13 UTC58m
2026-07-25 RPA4404 CLE → PHL Jul 25, 00:45 UTCJul 25, 01:30 UTC45m
2026-07-24 RPA4624 DCA → RDU Jul 24, 21:41 UTCJul 24, 23:29 UTC1h 48m
2026-07-24 RPA4624 DCA → RDU Jul 24, 21:45 UTCJul 24, 23:30 UTC1h 45m
2026-07-24 RPA4624 DCA → RDU Jul 24, 18:20 UTCJul 24, 20:10 UTC1h 50m
2026-07-24 RPA4473 PWM → DCA Jul 24, 15:50 UTCJul 24, 16:45 UTC55m
2026-07-24 RPA4473 PWM → DCA Jul 24, 13:45 UTCJul 24, 14:40 UTC55m
2026-07-24 RPA4586 - Jul 24, 10:55 UTCJul 24, 12:30 UTC1h 35m
2026-07-24 RPA4586 CHS → LGA Jul 24, 10:54 UTCJul 24, 12:29 UTC1h 35m
2026-07-24 RPA4583 MCI → LGA Jul 24, 01:33 UTCJul 24, 03:04 UTC1h 31m
2026-07-24 RPA4583 MCI → LGA Jul 24, 01:35 UTCJul 24, 03:05 UTC1h 30m
2026-07-23 RPA4588 JFK → RDU Jul 23, 22:35 UTCJul 24, 00:05 UTC1h 30m
2026-07-23 RPA4588 JFK → RDU Jul 23, 22:31 UTCJul 24, 00:03 UTC1h 32m
2026-07-23 RPA4588 JFK → RDU Jul 23, 19:25 UTCJul 23, 21:05 UTC1h 40m
2026-07-23 RPA4614 IND → LGA Jul 23, 16:25 UTCJul 23, 18:05 UTC1h 40m
2026-07-23 RPA4614 IND → LGA Jul 23, 13:40 UTCJul 23, 15:20 UTC1h 40m
2026-07-23 RPA4396 PWM → PHL Jul 23, 11:28 UTCJul 23, 12:06 UTC38m
2026-07-23 RPA4396 PWM → PHL Jul 23, 11:30 UTCJul 23, 12:15 UTC45m
2026-07-23 RPA4404 CLE → PHL Jul 23, 01:50 UTCJul 23, 02:30 UTC40m
2026-07-22 RPA4624 DCA → RDU Jul 22, 22:35 UTCJul 23, 00:30 UTC1h 55m
2026-07-22 RPA4624 DCA → RDU Jul 22, 19:30 UTCJul 22, 21:25 UTC1h 55m
2026-07-22 RPA9930 SDF → LGA Jul 22, 17:20 UTCJul 22, 18:15 UTC55m
2026-07-22 RPA4471 MEM → LGA Jul 22, 02:05 UTCJul 22, 04:00 UTC1h 55m
2026-07-21 RPA4473 PWM → DCA Jul 21, 16:47 UTCJul 21, 17:45 UTC58m
2026-07-21 RPA4473 PWM → DCA Jul 21, 16:50 UTCJul 21, 17:55 UTC1h 5m
2026-07-21 RPA9933 PHL → ATL Jul 21, 11:10 UTCJul 21, 12:05 UTC55m
2026-07-21 RPA4583 - Jul 21, 03:15 UTCJul 21, 04:45 UTC1h 30m
2026-07-20 RPA4588 - Jul 20, 23:30 UTCJul 21, 02:05 UTC2h 34m
2026-07-20 RPA4588 - Jul 20, 20:55 UTCJul 20, 22:30 UTC1h 35m
2026-07-20 RPA4606 ATL → LGA Jul 20, 16:45 UTCJul 20, 18:40 UTC1h 55m
2026-07-20 RPA4606 ATL → LGA Jul 20, 16:45 UTCJul 20, 18:34 UTC1h 49m
2026-07-20 RPA4606 LGA → ATL Jul 20, 14:00 UTCJul 20, 15:50 UTC1h 50m
2026-07-20 RPA4751 JFK → DCA Jul 20, 10:20 UTCJul 20, 11:50 UTC1h 30m
2026-07-20 RPA4751 JFK → DCA Jul 20, 10:19 UTCJul 20, 11:46 UTC1h 27m
2026-07-20 RPA9937 DCA → BOS Jul 20, 02:35 UTCJul 20, 03:25 UTC50m
2026-07-19 RPA861 - Jul 19, 19:40 UTCJul 19, 20:35 UTC55m
2026-07-19 RPA4343 BGR → LGA Jul 19, 17:24 UTCJul 19, 18:40 UTC1h 16m
2026-07-19 RPA4343 BGR → LGA Jul 19, 17:25 UTCJul 19, 18:45 UTC1h 20m
2026-07-19 RPA4343 LGA → BGR Jul 19, 13:50 UTCJul 19, 14:50 UTC1h 0m

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 N861RW page for operator, model, and routing details .

Mode-S ABD41A frequently asked

What is Mode-S code ABD41A?
ABD41A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N861RW.
Where is Mode-S ABD41A registered?
Mode-S code ABD41A 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 ABD41A broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABD41A, octal 52752032, decimal 11,260,954.
What flights does ABD41A operate?
Mode-S ABD41A has broadcast 20 distinct callsigns, including RPA4347, RPA4479, RPA4591, RPA4502, RPA4623.