Apparatus

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sensors Mode-S transponder

A21BEA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N235JQ · EMBRAER ERJ-170-200 (long wing) · operated by DELTA AIR LINES INC

Hex
A21BEA
Octal
50415752
Decimal
10,623,978
Country
US
Tail
N235JQ
Type
E75L
No current signal · last broadcast Jul 26, 22:30 UTC
Flights observed
708
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:30 UTC

Last known position

Most recent position reported by Mode-S A21BEA.

Country allocation

The ICAO 24-bit address A21BEA 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
RPA5657 - 19 2026-06-29
RPA5764 Republic Airlines 12 2026-06-02
RPA5649 - 11 2026-07-10
RPA5623 - 10 2026-06-24
RPA5706 - 9 2026-06-15
RPA5833 Republic Airlines 8 2026-05-23
RPA5774 Republic Airlines 8 2026-07-25
RPA5672 Republic Airlines 8 2026-05-24
RPA5862 - 7 2026-07-14
RPA5838 - 7 2026-07-11
RPA5816 - 7 2026-07-11
RPA5701 - 7 2026-07-13
RPA5644 - 7 2026-07-22
RPA5597 Republic Airlines 7 2026-05-29
RPA5854 - 6 2026-07-15
RPA5845 Republic Airlines 6 2026-05-31
RPA5778 Republic Airlines 6 2026-06-07
RPA5740 Republic Airlines 6 2026-07-24
RPA5693 - 6 2026-07-16
RPA5685 - 6 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RPA5858 JFK → CHS Jul 26, 22:05 UTCJul 26, 22:30 UTC25m
2026-07-26 RPA5858 JFK → CHS Jul 26, 19:20 UTCJul 26, 20:40 UTC1h 20m
2026-07-26 RPA5670 CMH → JFK Jul 26, 16:10 UTCJul 26, 18:00 UTC1h 50m
2026-07-26 RPA5670 CMH → JFK Jul 26, 16:08 UTCJul 26, 18:00 UTC1h 52m
2026-07-26 RPA5670 CMH → JFK Jul 26, 12:45 UTCJul 26, 14:45 UTC2h 0m
2026-07-26 RPA5710 CMH → LGA Jul 26, 10:15 UTCJul 26, 11:10 UTC55m
2026-07-26 RPA5710 CMH → LGA Jul 26, 10:11 UTCJul 26, 11:14 UTC1h 3m
2026-07-26 RPA5788 CLT → BOS Jul 26, 01:30 UTCJul 26, 02:30 UTC1h 0m
2026-07-25 RPA5855 MCI → BOS Jul 25, 22:55 UTCJul 25, 23:25 UTC30m
2026-07-25 RPA5855 MCI → BOS Jul 25, 22:50 UTCJul 25, 23:25 UTC35m
2026-07-25 RPA5762 JFK → BOS Jul 25, 20:30 UTCJul 25, 21:05 UTC35m
2026-07-25 RPA5774 BOS → JFK Jul 25, 18:55 UTCJul 25, 19:25 UTC30m
2026-07-25 RPA5774 BOS → JFK Jul 25, 18:52 UTCJul 25, 19:25 UTC33m
2026-07-25 RPA5774 BOS → JFK Jul 25, 16:45 UTCJul 25, 17:20 UTC35m
2026-07-25 RPA5607 BOS → PHL Jul 25, 15:10 UTCJul 25, 15:50 UTC40m
2026-07-25 RPA5606 PIT → BOS Jul 25, 12:45 UTCJul 25, 13:25 UTC40m
2026-07-25 RPA5839 LGA → DCA Jul 25, 10:10 UTCJul 25, 11:25 UTC1h 15m
2026-07-25 RPA5839 LGA → DCA Jul 25, 10:09 UTCJul 25, 11:17 UTC1h 8m
2026-07-25 RPA5743 BOS → BNA Jul 25, 02:10 UTCJul 25, 02:55 UTC45m
2026-07-24 RPA5856 IND → LGA Jul 24, 22:55 UTCJul 24, 23:50 UTC55m
2026-07-24 RPA5856 IND → LGA Jul 24, 20:25 UTCJul 24, 21:25 UTC1h 0m
2026-07-24 RPA5808 LGA → CLT Jul 24, 18:00 UTCJul 24, 18:45 UTC45m
2026-07-24 RPA5678 SDF → LGA Jul 24, 15:05 UTCJul 24, 16:20 UTC1h 15m
2026-07-24 RPA5678 SDF → LGA Jul 24, 12:35 UTCJul 24, 13:55 UTC1h 20m
2026-07-24 RPA5740 JFK → DCA Jul 24, 10:20 UTCJul 24, 10:30 UTC10m
2026-07-24 RPA5740 JFK → DCA Jul 24, 10:18 UTCJul 24, 11:07 UTC49m
2026-07-24 RPA5610 JFK → BNA Jul 24, 01:05 UTCJul 24, 02:05 UTC1h 0m
2026-07-23 RPA5738 LGA → DCA Jul 23, 23:15 UTCJul 23, 23:50 UTC35m
2026-07-23 RPA5715 ORD → BOS Jul 23, 19:55 UTCJul 23, 20:55 UTC1h 0m
2026-07-23 RPA5715 ORD → BOS Jul 23, 17:40 UTCJul 23, 18:40 UTC1h 0m
2026-07-23 RPA5755 BOS → LGA Jul 23, 15:35 UTCJul 23, 16:35 UTC1h 0m
2026-07-23 RPA5687 DCA → BOS Jul 23, 13:00 UTCJul 23, 14:05 UTC1h 5m
2026-07-23 RPA5770 LGA → CMH Jul 23, 10:35 UTCJul 23, 11:25 UTC50m
2026-07-23 RPA5770 LGA → CMH Jul 23, 10:34 UTCJul 23, 11:22 UTC48m
2026-07-23 RPA5609 IND → BOS Jul 23, 01:45 UTCJul 23, 02:39 UTC54m
2026-07-23 RPA5609 IND → BOS Jul 23, 01:45 UTCJul 23, 02:45 UTC1h 0m
2026-07-22 RPA5644 - Jul 22, 23:30 UTCJul 23, 00:30 UTC1h 0m
2026-07-22 RPA5644 BOS → BWI Jul 22, 20:10 UTCJul 22, 21:25 UTC1h 15m
2026-07-22 RPA5668 JFK → DCA Jul 22, 18:10 UTCJul 22, 19:10 UTC1h 0m
2026-07-22 RPA5668 JFK → DCA Jul 22, 18:08 UTCJul 22, 19:07 UTC59m
2026-07-22 RPA5668 JFK → DCA Jul 22, 15:40 UTCJul 22, 17:00 UTC1h 20m
2026-07-22 RPA5785 BOS → RDU Jul 22, 13:45 UTCJul 22, 14:30 UTC45m
2026-07-22 RPA5652 - Jul 22, 11:10 UTCJul 22, 11:55 UTC45m
2026-07-21 RPA5906 DCA → ORD Jul 21, 23:25 UTCJul 22, 00:30 UTC1h 5m
2026-07-21 RPA5821 LGA → DCA Jul 21, 19:30 UTCJul 21, 21:35 UTC2h 5m
2026-07-21 RPA5654 BNA → LGA Jul 21, 15:55 UTCJul 21, 17:20 UTC1h 25m
2026-07-21 RPA5654 BNA → LGA Jul 21, 12:40 UTCJul 21, 15:00 UTC2h 20m
2026-07-21 RPA5765 BOS → BNA Jul 21, 10:20 UTCJul 21, 11:05 UTC45m
2026-07-21 RPA5702 BOS → JAX Jul 21, 02:20 UTCJul 21, 03:05 UTC45m
2026-07-21 RPA5702 BOS → JAX Jul 21, 02:19 UTCJul 21, 03:05 UTC46m

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 N235JQ page for operator, model, and routing details .

Mode-S A21BEA frequently asked

What is Mode-S code A21BEA?
A21BEA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N235JQ.
Where is Mode-S A21BEA registered?
Mode-S code A21BEA 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 A21BEA broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A21BEA, octal 50415752, decimal 10,623,978.
What flights does A21BEA operate?
Mode-S A21BEA has broadcast 20 distinct callsigns, including RPA5657, RPA5764, RPA5649, RPA5623, RPA5706.