Apparatus

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sensors Mode-S transponder

AC1F61

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N880RW · EMBRAER ERJ-170-100 · operated by DELTA AIR LINES INC

Hex
AC1F61
Octal
53017541
Decimal
11,280,225
Country
US
Tail
N880RW
Type
E170
Broadcasting now · callsign RPA5776 · -50 ft
Flights observed
665
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:40 UTC

Current position

AC1F61 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AC1F61 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 - 51 2026-07-05
RPA5645 - 44 2026-07-06
RPA5729 - 29 2026-07-04
RPA5734 - 25 2026-07-05
RPA5694 - 18 2026-07-12
RPA5760 Republic Airlines 15 2026-07-24
RPA5637 - 15 2026-07-15
RPA5661 - 14 2026-07-19
RPA5592 - 14 2026-07-06
RPA5841 - 13 2026-07-17
RPA5643 Republic Airlines 13 2026-06-26
RPA5825 - 12 2026-07-12
RPA5817 Republic Airlines 11 2026-07-25
RPA5691 - 11 2026-07-20
RPA5590 Republic Airlines 11 2026-07-25
RPA5675 - 10 2026-07-11
RPA5646 - 10 2026-07-17
RPA5618 Republic Airlines 10 2026-07-25
RPA5781 - 9 2026-07-05
RPA5770 - 9 2026-07-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RPA5642 BOS → IND Jul 26, 19:00 UTCJul 26, 20:40 UTC1h 40m
2026-07-26 RPA5642 BOS → IND Jul 26, 16:00 UTCJul 26, 17:30 UTC1h 30m
2026-07-26 RPA5664 MKE → BOS Jul 26, 13:45 UTCJul 26, 14:40 UTC55m
2026-07-26 RPA5664 MKE → BOS Jul 26, 11:20 UTCJul 26, 12:10 UTC50m
2026-07-25 RPA5590 LGA → BOS Jul 25, 21:05 UTCJul 25, 22:40 UTC1h 35m
2026-07-25 RPA5830 CMH → BOS Jul 25, 18:50 UTCJul 25, 19:35 UTC45m
2026-07-25 RPA5817 LGA → DCA Jul 25, 17:05 UTCJul 25, 17:50 UTC45m
2026-07-25 RPA5618 CMH → BOS Jul 25, 13:50 UTCJul 25, 15:30 UTC1h 40m
2026-07-24 RPA5760 CMH → LGA Jul 24, 23:55 UTCJul 25, 00:50 UTC55m
2026-07-24 RPA5760 CMH → LGA Jul 24, 21:40 UTCJul 24, 22:35 UTC55m
2026-07-24 RPA5723 CLT → LGA Jul 24, 18:40 UTCJul 24, 20:25 UTC1h 45m
2026-07-24 RPA5723 CLT → LGA Jul 24, 15:23 UTCJul 24, 17:13 UTC1h 50m
2026-07-24 RPA5723 CLT → LGA Jul 24, 15:25 UTCJul 24, 17:15 UTC1h 50m
2026-07-24 RPA5847 DCA → BOS Jul 24, 12:05 UTCJul 24, 13:55 UTC1h 50m
2026-07-23 RPA5853 RDU → LGA Jul 23, 22:10 UTCJul 24, 00:20 UTC2h 10m
2026-07-23 RPA5822 CMH → LGA Jul 23, 19:45 UTCJul 23, 20:35 UTC50m
2026-07-23 RPA5822 CMH → LGA Jul 23, 18:00 UTCJul 23, 18:30 UTC30m
2026-07-23 RPA5662 DCA → LGA Jul 23, 15:55 UTCJul 23, 16:45 UTC50m
2026-07-23 RPA5662 DCA → LGA Jul 23, 14:05 UTCJul 23, 14:40 UTC35m
2026-07-23 RPA5599 - Jul 23, 11:15 UTCJul 23, 12:30 UTC1h 15m
2026-07-23 RPA5599 CLT → LGA Jul 23, 11:14 UTCJul 23, 12:34 UTC1h 20m
2026-07-22 RPA5818 BOS → ORD Jul 22, 23:53 UTCJul 23, 01:24 UTC1h 31m
2026-07-22 RPA5818 BOS → ORD Jul 22, 23:55 UTCJul 23, 01:35 UTC1h 40m
2026-07-22 RPA5590 LGA → BOS Jul 22, 20:15 UTCJul 22, 21:55 UTC1h 40m
2026-07-22 RPA5830 CMH → BOS Jul 22, 18:30 UTCJul 22, 19:15 UTC45m
2026-07-22 RPA5817 LGA → DCA Jul 22, 16:30 UTCJul 22, 17:10 UTC40m
2026-07-22 RPA5817 LGA → DCA Jul 22, 16:25 UTCJul 22, 17:08 UTC43m
2026-07-22 RPA5618 CMH → BOS Jul 22, 13:45 UTCJul 22, 15:30 UTC1h 45m
2026-07-21 RPA5664 MKE → BOS Jul 21, 17:00 UTCJul 21, 18:00 UTC1h 0m
2026-07-21 RPA5664 MKE → BOS Jul 21, 13:40 UTCJul 21, 14:50 UTC1h 10m
2026-07-21 RPA5760 CMH → LGA Jul 21, 00:10 UTCJul 21, 01:05 UTC55m
2026-07-20 RPA5760 CMH → LGA Jul 20, 21:40 UTCJul 20, 22:35 UTC55m
2026-07-20 RPA5723 MKE → LGA Jul 20, 18:45 UTCJul 20, 20:25 UTC1h 40m
2026-07-20 RPA5723 LGA → MKE Jul 20, 15:35 UTCJul 20, 17:25 UTC1h 50m
2026-07-20 RPA5691 CMH → LGA Jul 20, 12:10 UTCJul 20, 13:25 UTC1h 15m
2026-07-20 RPA5681 - Jul 20, 01:20 UTCJul 20, 02:40 UTC1h 20m
2026-07-20 RPA5681 LGA → LGA Jul 20, 00:50 UTCJul 20, 00:55 UTC5m
2026-07-19 RPA5719 BOS → LGA Jul 19, 21:40 UTCJul 19, 22:40 UTC1h 0m
2026-07-19 RPA5719 BOS → LGA Jul 19, 19:30 UTCJul 19, 20:15 UTC45m
2026-07-19 RPA5661 - Jul 19, 16:40 UTCJul 19, 18:05 UTC1h 25m
2026-07-19 RPA5661 LGA → GRR Jul 19, 13:50 UTCJul 19, 15:25 UTC1h 35m
2026-07-18 RPA5806 BOS → LGA Jul 18, 11:05 UTCJul 18, 12:35 UTC1h 30m
2026-07-18 RPA5806 BOS → LGA Jul 18, 11:04 UTCJul 18, 12:32 UTC1h 28m
2026-07-18 RPA5659 LGA → GRR Jul 18, 01:15 UTCJul 18, 02:55 UTC1h 41m
2026-07-17 RPA5646 - Jul 17, 22:55 UTCJul 18, 00:25 UTC1h 30m
2026-07-17 RPA5646 LGA → IND Jul 17, 20:15 UTCJul 17, 22:00 UTC1h 45m
2026-07-17 RPA5841 - Jul 17, 18:00 UTCJul 17, 18:50 UTC50m
2026-07-17 RPA5841 SYR → LGA Jul 17, 17:57 UTCJul 17, 18:43 UTC46m
2026-07-17 RPA5841 - Jul 17, 16:10 UTCJul 17, 16:44 UTC35m
2026-07-17 RPA5691 - Jul 17, 12:10 UTCJul 17, 13:25 UTC1h 15m

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 N880RW page for operator, model, and routing details .

Mode-S AC1F61 frequently asked

What is Mode-S code AC1F61?
AC1F61 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N880RW.
Where is Mode-S AC1F61 registered?
Mode-S code AC1F61 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 AC1F61 broadcasting right now?
Yes. Mode-S AC1F61 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC1F61, octal 53017541, decimal 11,280,225.
What flights does AC1F61 operate?
Mode-S AC1F61 has broadcast 20 distinct callsigns, including RPA5608, RPA5645, RPA5729, RPA5734, RPA5694.