Apparatus

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sensors Mode-S transponder

A70BFF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N553QS · CESSNA 680 Citation Latitude · operated by AIVIA LLC, ALBATON AIR LLC, STEWART-PRITCHETT ANDREA, CONCRETE PUMP PARTNERS LLC, DOUBLE P AVIATION LLC, TANZBERGER ERIC DAVID

Hex
A70BFF
Octal
51605777
Decimal
10,947,583
Country
US
Tail
N553QS
Type
C68A
No current signal · last broadcast 8h ago
Flights observed
100
Distinct callsigns
3
Country
US
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S A70BFF.

Country allocation

The ICAO 24-bit address A70BFF 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 3 distinct

Callsign Airline Flights Last seen
EJA553 NetJets 88 2026-05-29
N553QS - 10 2026-05-29
EJA7425 NetJets 2 2026-05-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 EJA553 PWK → SFO May 29, 22:15 UTCMay 29, 23:00 UTC45m
2026-05-29 EJA553 PWK → SFO May 29, 20:40 UTCMay 29, 21:05 UTC25m
2026-05-29 N553QS - May 29, 17:10 UTCMay 29, 18:10 UTC1h 0m
2026-05-28 N553QS - May 28, 22:15 UTCMay 29, 18:10 UTC19h 55m
2026-05-28 EJA553 PWK → SFO May 28, 18:35 UTCMay 28, 19:25 UTC50m
2026-05-28 EJA553 PWK → SFO May 28, 16:30 UTCMay 28, 17:40 UTC1h 10m
2026-05-28 EJA553 PWK → SFO May 28, 11:40 UTCMay 28, 13:35 UTC1h 55m
2026-05-28 EJA553 PWK → SFO May 28, 02:15 UTCMay 28, 02:55 UTC40m
2026-05-27 EJA553 PWK → SFO May 27, 21:40 UTCMay 28, 01:00 UTC3h 20m
2026-05-27 EJA553 PWK → SFO May 27, 16:40 UTCMay 27, 17:25 UTC45m
2026-05-27 EJA553 PWK → SFO May 27, 14:05 UTCMay 27, 15:45 UTC1h 40m
2026-05-26 EJA7425 IAD → DCA May 26, 23:29 UTCMay 27, 00:10 UTC40m
2026-05-26 EJA7425 IAD → DCA May 26, 21:09 UTCMay 26, 21:55 UTC45m
2026-05-26 EJA553 PWK → SFO May 26, 18:50 UTCMay 26, 19:30 UTC40m
2026-05-26 EJA553 PWK → SFO May 26, 16:55 UTCMay 26, 17:30 UTC35m
2026-05-25 EJA553 PWK → SFO May 25, 21:15 UTCMay 25, 22:19 UTC1h 5m
2026-05-25 EJA553 PWK → SFO May 25, 19:10 UTCMay 25, 19:54 UTC45m
2026-05-25 N553QS - May 25, 15:45 UTCMay 25, 18:00 UTC2h 15m
2026-05-25 N553QS - May 25, 13:00 UTCMay 25, 13:20 UTC20m
2026-05-24 N553QS - May 24, 18:30 UTCMay 24, 19:05 UTC35m
2026-05-23 N553QS - May 23, 21:45 UTCMay 23, 22:05 UTC20m
2026-05-23 EJA553 PWK → SFO May 23, 19:55 UTCMay 23, 20:05 UTC10m
2026-05-23 N553QS - May 23, 17:30 UTCMay 23, 18:00 UTC30m
2026-05-23 N553QS - May 23, 13:10 UTCMay 23, 15:25 UTC2h 15m
2026-05-22 EJA553 PWK → SFO May 22, 22:20 UTCMay 22, 23:00 UTC40m
2026-05-22 EJA553 PWK → SFO May 22, 18:05 UTCMay 22, 20:35 UTC2h 30m
2026-05-22 N553QS - May 22, 16:20 UTCMay 22, 16:50 UTC30m
2026-05-22 N553QS - May 22, 12:15 UTCMay 22, 12:30 UTC15m
2026-05-21 EJA553 PWK → SFO May 21, 17:20 UTCMay 21, 20:30 UTC3h 10m
2026-05-21 EJA553 PWK → SFO May 21, 15:55 UTCMay 21, 16:15 UTC20m
2026-05-20 EJA553 PWK → SFO May 20, 23:00 UTCMay 21, 01:15 UTC2h 15m
2026-05-20 EJA553 PWK → SFO May 20, 20:25 UTCMay 20, 21:25 UTC1h 0m
2026-05-20 EJA553 PWK → SFO May 20, 17:45 UTCMay 20, 18:25 UTC40m
2026-05-19 EJA553 PWK → SFO May 19, 16:30 UTCMay 19, 18:00 UTC1h 30m
2026-05-19 EJA553 PWK → SFO May 19, 14:40 UTCMay 19, 15:05 UTC25m
2026-05-19 EJA553 PWK → SFO May 19, 12:30 UTCMay 19, 13:25 UTC55m
2026-05-18 EJA553 PWK → SFO May 18, 20:05 UTCMay 18, 21:20 UTC1h 15m
2026-05-18 EJA553 PWK → SFO May 18, 18:00 UTCMay 18, 18:45 UTC44m
2026-05-18 EJA553 PWK → SFO May 18, 15:45 UTCMay 18, 17:00 UTC1h 15m
2026-05-18 EJA553 PWK → SFO May 18, 13:35 UTCMay 18, 14:25 UTC50m
2026-05-17 EJA553 PWK → SFO May 17, 17:05 UTCMay 17, 19:05 UTC2h 0m
2026-05-17 EJA553 PWK → SFO May 17, 13:31 UTCMay 17, 15:31 UTC2h 0m
2026-05-17 EJA553 PWK → SFO May 17, 11:35 UTCMay 17, 12:05 UTC30m
2026-05-17 EJA553 PWK → SFO May 17, 09:00 UTCMay 17, 09:15 UTC15m
2026-05-17 EJA553 PWK → SFO May 17, 01:15 UTCMay 17, 01:55 UTC40m
2026-05-15 EJA553 PWK → SFO May 15, 21:00 UTCMay 15, 23:00 UTC2h 0m
2026-05-15 EJA553 PWK → SFO May 15, 19:40 UTCMay 15, 20:15 UTC35m
2026-05-15 EJA553 PWK → SFO May 15, 16:55 UTCMay 15, 17:25 UTC30m
2026-05-15 EJA553 PWK → SFO May 15, 14:15 UTCMay 15, 16:05 UTC1h 49m
2026-05-14 EJA553 PWK → SFO May 14, 22:15 UTCMay 15, 00:50 UTC2h 35m

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 N553QS page for operator, model, and routing details .

Mode-S A70BFF frequently asked

What is Mode-S code A70BFF?
A70BFF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N553QS.
Where is Mode-S A70BFF registered?
Mode-S code A70BFF 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 A70BFF broadcasting right now?
No active broadcast right now. Last signal was 8h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A70BFF, octal 51605777, decimal 10,947,583.
What flights does A70BFF operate?
Mode-S A70BFF has broadcast 3 distinct callsigns, including EJA553, N553QS, EJA7425.