Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AA818D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N776YX · EMBRAER ERJ-170-100 · operated by REPUBLIC AIRWAYS INC

Hex
AA818D
Octal
52500615
Decimal
11,174,285
Country
US
Tail
N776YX
Type
E170
No current signal · last broadcast Jul 26, 19:20 UTC
Flights observed
687
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 19:20 UTC

Last known position

Most recent position reported by Mode-S AA818D.

Country allocation

The ICAO 24-bit address AA818D 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
RPA3579 - 10 2026-07-20
RPA3448 - 9 2026-07-07
RPA3564 Republic Airlines 8 2026-07-25
RPA3635 - 7 2026-07-05
RPA3614 - 7 2026-07-06
RPA3558 Republic Airlines 7 2026-06-17
RPA3498 - 7 2026-07-03
RPA3701 - 6 2026-07-13
RPA3556 Republic Airlines 6 2026-07-25
RPA3553 Republic Airlines 6 2026-07-17
RPA3541 - 6 2026-07-20
RPA3528 - 6 2026-07-03
RPA3522 - 6 2026-07-04
RPA3493 - 6 2026-07-03
RPA3460 - 6 2026-07-12
RPA3707 Republic Airlines 5 2026-05-16
RPA3705 Republic Airlines 5 2026-06-01
RPA3597 - 5 2026-07-10
RPA3581 - 5 2026-06-21
RPA3572 - 5 2026-07-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RPA3694 ORF → IAD Jul 26, 17:26 UTCJul 26, 19:09 UTC1h 43m
2026-07-26 RPA3421 CLT → EWR Jul 26, 14:15 UTCJul 26, 15:50 UTC1h 35m
2026-07-26 RPA3700 IND → IAD Jul 26, 10:40 UTCJul 26, 12:05 UTC1h 25m
2026-07-26 RPA3700 IND → IAD Jul 26, 10:44 UTCJul 26, 12:01 UTC1h 17m
2026-07-26 RPA3606 PIT → EWR Jul 26, 02:25 UTCJul 26, 04:00 UTC1h 35m
2026-07-25 RPA3564 CMH → EWR Jul 25, 23:35 UTCJul 26, 01:35 UTC2h 0m
2026-07-25 RPA3556 CVG → ORD Jul 25, 18:35 UTCJul 25, 20:40 UTC2h 5m
2026-07-25 RPA3583 BOS → EWR Jul 25, 15:40 UTCJul 25, 16:45 UTC1h 5m
2026-07-25 RPA3536 ATL → EWR Jul 25, 12:30 UTCJul 25, 14:10 UTC1h 40m
2026-07-24 RPA3499 EWR → AVL Jul 24, 20:20 UTCJul 24, 23:10 UTC2h 50m
2026-07-24 RPA3690 SDF → ORD Jul 24, 16:40 UTCJul 24, 19:05 UTC2h 25m
2026-07-24 RPA3497 CHS → EWR Jul 24, 13:30 UTCJul 24, 14:15 UTC45m
2026-07-24 RPA3497 CHS → EWR Jul 24, 13:24 UTCJul 24, 14:12 UTC48m
2026-07-23 RPA3286 IAD → EWR Jul 23, 16:55 UTCJul 23, 18:36 UTC1h 41m
2026-07-23 RPA3520 EWR → BUF Jul 23, 00:15 UTCJul 23, 01:00 UTC45m
2026-07-22 RPA3624 EWR → ROC Jul 22, 22:25 UTCJul 22, 23:25 UTC1h 0m
2026-07-22 RPA3695 SAT → EWR Jul 22, 17:30 UTCJul 22, 19:20 UTC1h 50m
2026-07-22 RPA3649 EWR → MSY Jul 22, 13:10 UTCJul 22, 15:30 UTC2h 20m
2026-07-22 RPA3304 CLT → ALB Jul 22, 11:10 UTCJul 22, 11:40 UTC30m
2026-07-21 RPA3418 - Jul 21, 22:30 UTCJul 21, 23:05 UTC35m
2026-07-21 RPA3427 - Jul 21, 19:45 UTCJul 21, 20:30 UTC45m
2026-07-21 RPA3402 AVL → EWR Jul 21, 16:55 UTCJul 21, 18:25 UTC1h 30m
2026-07-21 RPA3402 AVL → EWR Jul 21, 14:20 UTCJul 21, 15:45 UTC1h 25m
2026-07-21 RPA3410 ORD → MSN Jul 21, 12:30 UTCJul 21, 13:15 UTC45m
2026-07-21 RPA3410 ORD → MSN Jul 21, 12:33 UTCJul 21, 13:11 UTC38m
2026-07-21 RPA3626 - Jul 21, 10:05 UTCJul 21, 10:50 UTC45m
2026-07-21 RPA3643 EWR → RDU Jul 21, 02:20 UTCJul 21, 03:05 UTC45m
2026-07-21 RPA3565 BNA → EWR Jul 21, 00:10 UTCJul 21, 01:05 UTC55m
2026-07-20 RPA3579 - Jul 20, 22:40 UTCJul 20, 23:15 UTC35m
2026-07-20 RPA3593 - Jul 20, 21:15 UTCJul 20, 21:50 UTC35m
2026-07-20 RPA3593 PHL → IAD Jul 20, 21:00 UTCJul 20, 21:47 UTC47m
2026-07-20 RPA3541 IAD → PHL Jul 20, 19:20 UTCJul 20, 19:55 UTC35m
2026-07-20 RPA3671 YYZ → IAD Jul 20, 17:15 UTCJul 20, 18:10 UTC55m
2026-07-20 RPA3601 - Jul 20, 14:05 UTCJul 20, 15:15 UTC1h 10m
2026-07-20 RPA3429 MEM → EWR Jul 20, 11:15 UTCJul 20, 12:15 UTC1h 0m
2026-07-20 RPA3545 EWR → CMH Jul 20, 01:30 UTCJul 20, 02:45 UTC1h 15m
2026-07-19 RPA3620 - Jul 19, 22:15 UTCJul 19, 23:55 UTC1h 40m
2026-07-19 RPA3685 YYZ → EWR Jul 19, 19:25 UTCJul 19, 20:20 UTC55m
2026-07-19 RPA3467 CMH → EWR Jul 19, 14:00 UTCJul 19, 15:00 UTC1h 0m
2026-07-18 RPA3467 CMH → EWR Jul 18, 13:40 UTCJul 18, 15:15 UTC1h 35m
2026-07-17 RPA3481 - Jul 17, 23:30 UTCJul 18, 00:39 UTC1h 10m
2026-07-17 RPA3469 - Jul 17, 20:15 UTCJul 17, 21:55 UTC1h 40m
2026-07-17 RPA3469 IND → EWR Jul 17, 20:15 UTCJul 17, 21:50 UTC1h 35m
2026-07-17 RPA3702 - Jul 17, 18:44 UTCJul 17, 19:20 UTC35m
2026-07-17 RPA3617 EWR → PVD Jul 17, 14:35 UTCJul 17, 15:44 UTC1h 10m
2026-07-17 RPA3553 SAT → EWR Jul 17, 11:45 UTCJul 17, 12:55 UTC1h 10m
2026-07-17 RPA3518 - Jul 17, 00:30 UTCJul 17, 01:55 UTC1h 25m
2026-07-16 RPA3584 - Jul 16, 21:15 UTCJul 16, 22:40 UTC1h 25m
2026-07-16 RPA3415 - Jul 16, 18:59 UTCJul 16, 19:50 UTC50m
2026-07-16 RPA3704 ORD → RIC Jul 16, 16:19 UTCJul 16, 17:40 UTC1h 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 N776YX page for operator, model, and routing details .

Mode-S AA818D frequently asked

What is Mode-S code AA818D?
AA818D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N776YX.
Where is Mode-S AA818D registered?
Mode-S code AA818D 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 AA818D broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA818D, octal 52500615, decimal 11,174,285.
What flights does AA818D operate?
Mode-S AA818D has broadcast 20 distinct callsigns, including RPA3579, RPA3448, RPA3564, RPA3635, RPA3614.