Apparatus

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sensors Mode-S transponder

A1E58F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N221JQ · EMBRAER ERJ-170-200 (long wing) · operated by DELTA AIR LINES INC

Hex
A1E58F
Octal
50362617
Decimal
10,610,063
Country
US
Tail
N221JQ
Type
E75L
No current signal · last broadcast Jul 26, 21:45 UTC
Flights observed
720
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:45 UTC

Last known position

Most recent position reported by Mode-S A1E58F.

Country allocation

The ICAO 24-bit address A1E58F 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
RPA5638 Republic Airlines 13 2026-07-08
RPA5749 - 11 2026-07-06
RPA5620 Republic Airlines 11 2026-07-21
RPA5665 - 10 2026-06-27
RPA5805 - 9 2026-07-09
RPA5764 - 9 2026-07-17
RPA5666 - 9 2026-07-16
RPA5829 - 8 2026-07-01
RPA5769 - 8 2026-07-21
RPA5759 - 8 2026-07-20
RPA5692 Republic Airlines 8 2026-07-21
RPA5653 - 8 2026-07-12
RPA5622 - 8 2026-07-14
RPA5615 - 8 2026-07-16
RPA5603 - 8 2026-07-15
RPA5860 - 7 2026-07-04
RPA5789 - 7 2026-07-13
RPA5689 - 7 2026-06-29
RPA5675 Republic Airlines 7 2026-05-29
RPA5632 - 7 2026-06-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RPA5725 RIC → BOS Jul 26, 21:25 UTCJul 26, 21:45 UTC20m
2026-07-26 RPA5862 IND → BOS Jul 26, 18:55 UTCJul 26, 20:00 UTC1h 5m
2026-07-26 RPA5862 IND → BOS Jul 26, 15:45 UTCJul 26, 16:50 UTC1h 5m
2026-07-26 RRPA5711 - Jul 26, 12:10 UTCJul 26, 14:25 UTC2h 15m
2026-07-25 RRPA5773 - Jul 25, 17:50 UTCJul 25, 20:05 UTC2h 15m
2026-07-25 RRPA5755 BNH → LGA Jul 25, 15:20 UTCJul 25, 16:10 UTC50m
2026-07-25 RPA5873 JFK → IND Jul 25, 10:55 UTCJul 25, 12:25 UTC1h 30m
2026-07-24 RPA5671 CLE → BOS Jul 24, 21:55 UTCJul 24, 23:20 UTC1h 25m
2026-07-24 RPA5736 BOS → LGA Jul 24, 19:20 UTCJul 24, 20:10 UTC50m
2026-07-24 RPA5861 BOS → CLT Jul 24, 16:10 UTCJul 24, 17:45 UTC1h 35m
2026-07-24 RPA5621 - Jul 24, 13:15 UTCJul 24, 14:50 UTC1h 35m
2026-07-24 RPA5700 BOS → CHS Jul 24, 10:20 UTCJul 24, 11:35 UTC1h 15m
2026-07-23 RPA5671 CLE → BOS Jul 23, 22:25 UTCJul 23, 23:45 UTC1h 20m
2026-07-23 RPA5736 BOS → LGA Jul 23, 19:25 UTCJul 23, 20:10 UTC45m
2026-07-23 RPA5861 BOS → CLT Jul 23, 16:20 UTCJul 23, 18:00 UTC1h 40m
2026-07-23 RPA5621 - Jul 23, 13:30 UTCJul 23, 15:00 UTC1h 30m
2026-07-23 RPA5806 BOS → LGA Jul 23, 10:05 UTCJul 23, 11:25 UTC1h 20m
2026-07-23 RPA5806 BOS → LGA Jul 23, 10:02 UTCJul 23, 11:21 UTC1h 19m
2026-07-23 RPA5659 PHL → BOS Jul 23, 02:00 UTCJul 23, 03:40 UTC1h 40m
2026-07-22 RPA5843 LGA → BOS Jul 22, 22:55 UTCJul 23, 00:10 UTC1h 15m
2026-07-22 RPA5843 LGA → BOS Jul 22, 20:40 UTCJul 22, 21:40 UTC1h 0m
2026-07-22 RPA5730 BOS → LGA Jul 22, 18:45 UTCJul 22, 19:30 UTC45m
2026-07-22 RPA5674 DCA → BOS Jul 22, 15:45 UTCJul 22, 17:00 UTC1h 15m
2026-07-22 RPA5674 DCA → BOS Jul 22, 12:55 UTCJul 22, 14:30 UTC1h 35m
2026-07-22 RPA5710 CMH → LGA Jul 22, 11:30 UTCJul 22, 11:35 UTC5m
2026-07-21 RPA5769 BNA → DCA Jul 21, 17:05 UTCJul 21, 18:35 UTC1h 30m
2026-07-21 RPA5783 DCA → BNA Jul 21, 14:42 UTCJul 21, 16:10 UTC1h 28m
2026-07-21 RPA5783 - Jul 21, 14:45 UTCJul 21, 15:45 UTC1h 0m
2026-07-21 RPA5692 MCI → LGA Jul 21, 11:50 UTCJul 21, 13:15 UTC1h 25m
2026-07-21 RPA5620 LGA → DCA Jul 21, 00:35 UTCJul 21, 02:15 UTC1h 40m
2026-07-20 RPA5620 LGA → DCA Jul 20, 21:35 UTCJul 20, 23:30 UTC1h 55m
2026-07-20 RPA5626 CMH → LGA Jul 20, 17:45 UTCJul 20, 19:45 UTC2h 0m
2026-07-20 RPA5630 JFK → CLT Jul 20, 14:30 UTCJul 20, 16:15 UTC1h 45m
2026-07-20 RPA5759 LGA → BOS Jul 20, 12:15 UTCJul 20, 13:05 UTC50m
2026-07-20 RPA5843 LGA → BOS Jul 20, 02:35 UTCJul 20, 03:30 UTC55m
2026-07-20 RPA5843 LGA → BOS Jul 20, 02:34 UTCJul 20, 03:31 UTC57m
2026-07-19 RPA5843 LGA → BOS Jul 19, 23:35 UTCJul 20, 00:45 UTC1h 10m
2026-07-19 RPA5673 - Jul 19, 18:50 UTCJul 19, 21:00 UTC2h 10m
2026-07-19 RPA5673 - Jul 19, 15:35 UTCJul 19, 17:50 UTC2h 15m
2026-07-19 RPA5625 PHL → LGA Jul 19, 12:05 UTCJul 19, 12:30 UTC25m
2026-07-18 RPA5625 - Jul 18, 13:15 UTCJul 18, 15:55 UTC2h 40m
2026-07-18 RPA5780 LGA → MKE Jul 18, 01:00 UTCJul 18, 02:50 UTC1h 51m
2026-07-17 RPA5831 BOS → LGA Jul 17, 22:40 UTCJul 17, 23:30 UTC50m
2026-07-17 RPA5598 - Jul 17, 18:55 UTCJul 17, 20:35 UTC1h 40m
2026-07-17 RPA5598 BOS → CVG Jul 17, 15:55 UTCJul 17, 17:55 UTC2h 0m
2026-07-17 RPA5764 EWR → BOS Jul 17, 13:40 UTCJul 17, 14:20 UTC40m
2026-07-17 RPA5764 BOS → EWR Jul 17, 10:44 UTCJul 17, 11:35 UTC50m
2026-07-17 RPA5619 - Jul 17, 00:14 UTCJul 17, 01:59 UTC1h 45m
2026-07-17 RPA5619 MKE → BOS Jul 17, 00:10 UTCJul 17, 01:59 UTC1h 49m
2026-07-16 RPA5619 BOS → MKE Jul 16, 20:55 UTCJul 16, 23:15 UTC2h 20m

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 N221JQ page for operator, model, and routing details .

Mode-S A1E58F frequently asked

What is Mode-S code A1E58F?
A1E58F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N221JQ.
Where is Mode-S A1E58F registered?
Mode-S code A1E58F 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 A1E58F broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1E58F, octal 50362617, decimal 10,610,063.
What flights does A1E58F operate?
Mode-S A1E58F has broadcast 20 distinct callsigns, including RPA5638, RPA5749, RPA5620, RPA5665, RPA5805.