Apparatus

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sensors Mode-S transponder

ABC2E5

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N857RW · EMBRAER ERJ-170-100 · operated by REPUBLIC AIRWAYS INC

Hex
ABC2E5
Octal
52741345
Decimal
11,256,549
Country
US
Tail
N857RW
Type
E170
No current signal · last broadcast Jul 26, 20:45 UTC
Flights observed
634
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:45 UTC

Last known position

Most recent position reported by Mode-S ABC2E5.

Country allocation

The ICAO 24-bit address ABC2E5 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 Republic Airlines 29 2026-07-25
RPA4423 Republic Airlines 23 2026-07-26
RPA4381 Republic Airlines 19 2026-07-25
RPA4623 Republic Airlines 17 2026-07-26
RPA4509 - 17 2026-07-10
RPA4614 - 15 2026-06-28
RPA4556 - 15 2026-07-12
RPA4483 Republic Airlines 13 2026-07-02
RPA4438 - 13 2026-06-24
RPA4473 - 12 2026-07-07
RPA4588 - 11 2026-06-26
RPA4385 Republic Airlines 11 2026-05-10
RPA4578 Republic Airlines 10 2026-07-04
RPA4577 - 10 2026-07-04
RPA4462 Republic Airlines 10 2026-05-15
RPA4670 - 9 2026-07-11
RPA4667 - 9 2026-07-11
RPA4610 - 9 2026-06-23
RPA4550 - 9 2026-07-08
RPA4503 Republic Airlines 9 2026-06-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RPA4423 LGA → ILM Jul 26, 19:20 UTCJul 26, 20:45 UTC1h 25m
2026-07-26 RPA4623 DCA → ATL Jul 26, 17:05 UTCJul 26, 18:10 UTC1h 5m
2026-07-26 RPA4623 DCA → ATL Jul 26, 14:30 UTCJul 26, 15:30 UTC1h 0m
2026-07-26 RPA4377 GSO → LGA Jul 26, 12:15 UTCJul 26, 12:55 UTC40m
2026-07-26 RPA4377 GSO → LGA Jul 26, 12:14 UTCJul 26, 12:53 UTC39m
2026-07-25 RPA4374 SDF → PHL Jul 25, 22:24 UTCJul 25, 23:04 UTC40m
2026-07-25 RPA4374 SDF → PHL Jul 25, 22:25 UTCJul 25, 23:05 UTC40m
2026-07-25 RPA4381 BUF → ORD Jul 25, 19:25 UTCJul 25, 20:20 UTC55m
2026-07-25 RPA4381 BUF → ORD Jul 25, 19:18 UTCJul 25, 20:14 UTC56m
2026-07-25 RPA4381 BUF → ORD Jul 25, 17:35 UTCJul 25, 18:20 UTC45m
2026-07-25 RPA4347 ORD → CLE Jul 25, 15:15 UTCJul 25, 16:20 UTC1h 5m
2026-07-25 RPA4347 ORD → CLE Jul 25, 15:12 UTCJul 25, 16:19 UTC1h 7m
2026-07-25 RPA4347 ORD → CLE Jul 25, 13:05 UTCJul 25, 14:05 UTC1h 0m
2026-07-24 RPA4525 DCA → PHL Jul 24, 23:00 UTCJul 24, 23:50 UTC50m
2026-07-24 RPA4525 DCA → PHL Jul 24, 21:25 UTCJul 24, 22:00 UTC35m
2026-07-24 RPA4546 JFK → DCA Jul 24, 19:10 UTCJul 24, 20:05 UTC55m
2026-07-24 RPA4546 JFK → DCA Jul 24, 16:55 UTCJul 24, 17:35 UTC40m
2026-07-24 RPA4486 MEM → PHL Jul 24, 14:15 UTCJul 24, 15:05 UTC50m
2026-07-24 RPA4486 MEM → PHL Jul 24, 12:15 UTCJul 24, 13:10 UTC55m
2026-07-23 RPA4713 MSY → PHL Jul 23, 23:45 UTCJul 24, 00:55 UTC1h 10m
2026-07-23 RPA4713 MSY → PHL Jul 23, 20:50 UTCJul 23, 22:05 UTC1h 15m
2026-07-23 RPA4730 BOS → IND Jul 23, 18:20 UTCJul 23, 19:25 UTC1h 5m
2026-07-23 RPA4730 BOS → IND Jul 23, 18:19 UTCJul 23, 19:21 UTC1h 2m
2026-07-23 RPA4349 JFK → BOS Jul 23, 16:00 UTCJul 23, 17:20 UTC1h 20m
2026-07-23 RPA4687 JFK → DCA Jul 23, 12:30 UTCJul 23, 14:35 UTC2h 5m
2026-07-23 RPA4692 BNA → PHL Jul 23, 06:10 UTCJul 23, 06:25 UTC15m
2026-07-23 RPA4692 BNA → PHL Jul 23, 04:05 UTCJul 23, 06:25 UTC2h 20m
2026-07-23 RPA4692 BNA → PHL Jul 23, 04:03 UTCJul 23, 05:55 UTC1h 52m
2026-07-23 RPA4382 BUF → PHL Jul 23, 01:45 UTCJul 23, 02:50 UTC1h 5m
2026-07-23 RPA4382 BUF → PHL Jul 23, 01:40 UTCJul 23, 02:47 UTC1h 7m
2026-07-22 RPA4468 DCA → DSM Jul 22, 22:15 UTCJul 22, 23:55 UTC1h 40m
2026-07-22 RPA4468 DCA → DSM Jul 22, 19:20 UTCJul 22, 21:15 UTC1h 55m
2026-07-22 RPA4757 DCA → MVY Jul 22, 17:15 UTCJul 22, 17:55 UTC40m
2026-07-22 RPA4484 IND → DCA Jul 22, 15:00 UTCJul 22, 16:05 UTC1h 5m
2026-07-22 RPA4625 - Jul 22, 12:10 UTCJul 22, 13:35 UTC1h 25m
2026-07-22 RPA4625 PIT → ORD Jul 22, 12:05 UTCJul 22, 13:25 UTC1h 20m
2026-07-20 RPA4410 BOS → JFK Jul 20, 23:25 UTCJul 21, 00:20 UTC54m
2026-07-20 RPA4497 PIT → PHL Jul 20, 20:40 UTCJul 20, 21:50 UTC1h 10m
2026-07-20 RPA4497 PIT → PHL Jul 20, 20:37 UTCJul 20, 21:49 UTC1h 12m
2026-07-20 RPA4497 PIT → PHL Jul 20, 17:50 UTCJul 20, 19:00 UTC1h 10m
2026-07-20 RPA4502 BOS → STL Jul 20, 15:25 UTCJul 20, 16:30 UTC1h 5m
2026-07-20 RPA4502 BOS → STL Jul 20, 13:50 UTCJul 20, 14:35 UTC45m
2026-07-20 RPA4797 - Jul 20, 10:30 UTCJul 20, 12:05 UTC1h 35m
2026-07-19 RPA4793 LGA → IND Jul 19, 22:15 UTCJul 20, 00:05 UTC1h 50m
2026-07-19 RPA4564 - Jul 19, 13:20 UTCJul 19, 15:30 UTC2h 10m
2026-07-18 RPA4461 JFK → ORF Jul 18, 20:55 UTCJul 18, 23:15 UTC2h 20m
2026-07-18 RPA4357 - Jul 18, 13:20 UTCJul 18, 15:30 UTC2h 10m
2026-07-17 RPA4458 LGA → IND Jul 17, 23:10 UTCJul 18, 00:55 UTC1h 45m
2026-07-17 RPA4497 - Jul 17, 20:04 UTCJul 17, 21:10 UTC1h 5m
2026-07-17 RPA4497 LGA → RDU Jul 17, 17:35 UTCJul 17, 18:44 UTC1h 10m

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 N857RW page for operator, model, and routing details .

Mode-S ABC2E5 frequently asked

What is Mode-S code ABC2E5?
ABC2E5 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N857RW.
Where is Mode-S ABC2E5 registered?
Mode-S code ABC2E5 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 ABC2E5 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABC2E5, octal 52741345, decimal 11,256,549.
What flights does ABC2E5 operate?
Mode-S ABC2E5 has broadcast 20 distinct callsigns, including RPA4347, RPA4423, RPA4381, RPA4623, RPA4509.