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sensors Mode-S transponder

A20957

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N230JQ · EMBRAER ERJ-170-200 (long wing) · operated by DELTA AIR LINES INC

Hex
A20957
Octal
50404527
Decimal
10,619,223
Country
US
Tail
N230JQ
Type
E75L
No current signal · last broadcast Jul 26, 21:10 UTC
Flights observed
717
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:10 UTC

Last known position

Most recent position reported by Mode-S A20957.

Country allocation

The ICAO 24-bit address A20957 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
RPA5706 - 23 2026-06-29
RPA5597 - 16 2026-06-28
RPA5842 - 9 2026-07-26
RPA5798 Republic Airlines 9 2026-06-09
RPA5733 Republic Airlines 9 2026-07-20
RPA5727 Republic Airlines 9 2026-07-25
RPA5809 Republic Airlines 8 2026-06-19
RPA5804 Republic Airlines 8 2026-06-09
RPA5739 Republic Airlines 8 2026-05-13
RPA5690 - 8 2026-07-08
RPA5630 - 8 2026-07-12
RPA5837 - 7 2026-07-09
RPA5819 Republic Airlines 7 2026-07-23
RPA5764 Republic Airlines 7 2026-07-21
RPA5713 - 7 2026-07-17
RPA5695 Republic Airlines 7 2026-05-30
RPA5657 - 7 2026-07-11
RPA5643 Republic Airlines 7 2026-04-30
RPA5641 Republic Airlines 7 2026-06-07
RPA5851 Republic Airlines 6 2026-05-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RPA5644 BNA → BOS Jul 26, 20:00 UTCJul 26, 21:10 UTC1h 10m
2026-07-26 RPA5842 - Jul 26, 16:25 UTCJul 26, 18:30 UTC2h 5m
2026-07-26 RPA5842 - Jul 26, 12:40 UTCJul 26, 14:50 UTC2h 10m
2026-07-26 RPA5740 JFK → DCA Jul 26, 10:15 UTCJul 26, 11:00 UTC45m
2026-07-25 RPA5714 DCA → LGA Jul 25, 21:45 UTCJul 25, 22:45 UTC1h 0m
2026-07-25 RPA5727 DCA → LGA Jul 25, 19:28 UTCJul 25, 20:03 UTC35m
2026-07-25 RPA5727 DCA → LGA Jul 25, 19:30 UTCJul 25, 20:05 UTC35m
2026-07-25 RPA5848 LGA → DCA Jul 25, 16:15 UTCJul 25, 18:10 UTC1h 55m
2026-07-25 RPA5848 LGA → DCA Jul 25, 13:20 UTCJul 25, 15:15 UTC1h 55m
2026-07-25 RPA5768 DCA → LGA Jul 25, 01:23 UTCJul 25, 02:08 UTC45m
2026-07-25 RPA5768 DCA → LGA Jul 25, 01:25 UTCJul 25, 02:10 UTC45m
2026-07-24 RPA5667 SDF → LGA Jul 24, 22:10 UTCJul 24, 23:25 UTC1h 15m
2026-07-24 RPA5600 MCI → LGA Jul 24, 19:30 UTCJul 24, 20:40 UTC1h 10m
2026-07-24 RPA5769 IND → LGA Jul 24, 17:00 UTCJul 24, 18:20 UTC1h 20m
2026-07-24 RPA5783 DCA → BNA Jul 24, 14:10 UTCJul 24, 15:35 UTC1h 25m
2026-07-24 RPA5783 DCA → BNA Jul 24, 14:05 UTCJul 24, 15:29 UTC1h 24m
2026-07-24 RPA5692 MCI → LGA Jul 24, 11:35 UTCJul 24, 13:10 UTC1h 35m
2026-07-24 RPA5718 JFK → RDU Jul 24, 01:50 UTCJul 24, 02:30 UTC40m
2026-07-23 RPA5718 JFK → RDU Jul 23, 23:30 UTCJul 24, 00:30 UTC1h 0m
2026-07-23 RPA5819 LGA → CLT Jul 23, 21:27 UTCJul 23, 22:09 UTC42m
2026-07-23 RPA5819 LGA → CLT Jul 23, 21:30 UTCJul 23, 22:15 UTC45m
2026-07-23 RPA5730 BOS → LGA Jul 23, 18:20 UTCJul 23, 19:15 UTC55m
2026-07-23 RPA5654 BNA → LGA Jul 23, 15:20 UTCJul 23, 16:50 UTC1h 30m
2026-07-23 RPA5654 BNA → LGA Jul 23, 12:45 UTCJul 23, 14:25 UTC1h 40m
2026-07-23 RPA5765 BOS → BNA Jul 23, 10:25 UTCJul 23, 11:00 UTC35m
2026-07-23 RPA5702 BOS → JAX Jul 23, 02:45 UTCJul 23, 03:42 UTC57m
2026-07-23 RPA5702 BOS → JAX Jul 23, 02:50 UTCJul 23, 03:45 UTC55m
2026-07-22 RPA5647 OMA → LGA Jul 22, 23:10 UTCJul 23, 00:55 UTC1h 45m
2026-07-22 RPA5826 - Jul 22, 20:20 UTCJul 22, 21:05 UTC45m
2026-07-22 RPA5826 DTW → IND Jul 22, 20:17 UTCJul 22, 21:07 UTC50m
2026-07-22 RPA5774 - Jul 22, 18:20 UTCJul 22, 18:50 UTC30m
2026-07-22 RPA5774 - Jul 22, 16:35 UTCJul 22, 17:10 UTC35m
2026-07-22 RPA5607 - Jul 22, 14:45 UTCJul 22, 15:25 UTC40m
2026-07-22 RPA5605 LGA → DCA Jul 22, 12:40 UTCJul 22, 13:40 UTC1h 0m
2026-07-22 RPA5605 LGA → DCA Jul 22, 12:40 UTCJul 22, 13:40 UTC1h 0m
2026-07-21 RPA5598 - Jul 21, 21:25 UTCJul 21, 23:10 UTC1h 45m
2026-07-21 RPA5598 BOS → CVG Jul 21, 17:55 UTCJul 21, 20:00 UTC2h 5m
2026-07-21 RPA5764 SDF → LGA Jul 21, 13:52 UTCJul 21, 14:39 UTC47m
2026-07-21 RPA5764 SDF → LGA Jul 21, 13:55 UTCJul 21, 14:40 UTC45m
2026-07-21 RPA5764 SDF → LGA Jul 21, 10:50 UTCJul 21, 11:45 UTC55m
2026-07-20 RPA5829 EWR → BOS Jul 20, 20:10 UTCJul 20, 20:55 UTC45m
2026-07-20 RPA5829 BOS → EWR Jul 20, 18:15 UTCJul 20, 19:10 UTC55m
2026-07-20 RPA5733 BOS → JFK Jul 20, 14:15 UTCJul 20, 15:00 UTC45m
2026-07-20 RPA5677 - Jul 20, 11:25 UTCJul 20, 12:25 UTC1h 0m
2026-07-20 RPA5722 - Jul 20, 02:05 UTCJul 20, 03:05 UTC1h 0m
2026-07-20 RPA5716 BOS → LGA Jul 20, 00:05 UTCJul 20, 00:50 UTC45m
2026-07-19 RPA5819 - Jul 19, 22:05 UTCJul 19, 22:40 UTC35m
2026-07-19 RPA5747 DCA → LGA Jul 19, 19:58 UTCJul 19, 20:36 UTC38m
2026-07-19 RPA5747 DCA → LGA Jul 19, 20:00 UTCJul 19, 20:40 UTC40m
2026-07-19 RPA5749 LGA → DCA Jul 19, 17:25 UTCJul 19, 18:20 UTC55m

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 N230JQ page for operator, model, and routing details .

Mode-S A20957 frequently asked

What is Mode-S code A20957?
A20957 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N230JQ.
Where is Mode-S A20957 registered?
Mode-S code A20957 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 A20957 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A20957, octal 50404527, decimal 10,619,223.
What flights does A20957 operate?
Mode-S A20957 has broadcast 20 distinct callsigns, including RPA5706, RPA5597, RPA5842, RPA5798, RPA5733.