Apparatus

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sensors Mode-S transponder

ABFBAF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N871ST · BELL 407 · operated by PENNSYLVANIA STATE POLICE, BUREAU OF EMERGENCY & SPECIAL OPERATIONS

Hex
ABFBAF
Octal
52775657
Decimal
11,271,087
Country
US
Tail
N871ST
Type
B407
No current signal · last broadcast Jul 25, 21:50 UTC
Flights observed
109
Distinct callsigns
1
Country
US
Last broadcast
Jul 25, 21:50 UTC

Last known position

Most recent position reported by Mode-S ABFBAF.

Country allocation

The ICAO 24-bit address ABFBAF 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 1 distinct

Callsign Airline Flights Last seen
N871ST - 109 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 N871ST - Jul 25, 21:05 UTCJul 25, 21:50 UTC45m
2026-07-25 N871ST - Jul 25, 19:25 UTCJul 25, 20:00 UTC35m
2026-07-24 N871ST RDG → RDG Jul 24, 17:10 UTCJul 24, 18:25 UTC1h 15m
2026-07-22 N871ST RDG → RDG Jul 22, 18:00 UTCJul 22, 18:45 UTC45m
2026-07-22 N871ST - Jul 22, 16:35 UTCJul 22, 17:25 UTC50m
2026-07-22 N871ST - Jul 22, 15:25 UTCJul 22, 15:35 UTC10m
2026-07-22 N871ST - Jul 22, 11:40 UTCJul 22, 14:30 UTC2h 50m
2026-07-20 N871ST HAR → HAR Jul 20, 19:20 UTCJul 20, 19:45 UTC25m
2026-07-20 N871ST HAR → HAR Jul 20, 18:35 UTCJul 20, 18:55 UTC20m
2026-07-20 N871ST HAR → HAR Jul 20, 17:15 UTCJul 20, 17:30 UTC15m
2026-07-20 N871ST HAR → HAR Jul 20, 14:50 UTCJul 20, 15:20 UTC30m
2026-07-20 N871ST HAR → HAR Jul 20, 12:45 UTCJul 20, 13:05 UTC20m
2026-07-06 N871ST RDG → HAR Jul 6, 16:30 UTCJul 6, 17:10 UTC40m
2026-07-02 N871ST - Jul 2, 18:45 UTCJul 2, 20:10 UTC1h 25m
2026-07-02 N871ST - Jul 2, 15:10 UTCJul 2, 17:25 UTC2h 15m
2026-07-02 N871ST - Jul 2, 01:25 UTCJul 2, 01:35 UTC10m
2026-07-01 N871ST - Jul 1, 21:05 UTCJul 1, 22:00 UTC55m
2026-07-01 N871ST - Jul 1, 17:05 UTCJul 1, 18:10 UTC1h 5m
2026-07-01 N871ST - Jul 1, 15:40 UTCJul 1, 15:50 UTC10m
2026-06-30 N871ST - Jun 30, 05:15 UTCJun 30, 05:40 UTC25m
2026-06-30 N871ST - Jun 30, 03:55 UTCJun 30, 04:25 UTC30m
2026-06-30 N871ST - Jun 30, 01:09 UTCJun 30, 02:05 UTC56m
2026-06-29 N871ST PTW → RDG Jun 29, 19:15 UTCJun 29, 21:19 UTC2h 5m
2026-06-29 N871ST - Jun 29, 17:19 UTCJun 29, 17:30 UTC10m
2026-06-29 N871ST - Jun 29, 16:10 UTCJun 29, 16:44 UTC35m
2026-06-29 N871ST - Jun 29, 13:09 UTCJun 29, 13:30 UTC20m
2026-06-26 N871ST - Jun 26, 00:39 UTCJun 26, 02:24 UTC1h 45m
2026-06-25 N871ST - Jun 25, 16:55 UTCJun 25, 17:14 UTC20m
2026-06-25 N871ST - Jun 25, 15:59 UTCJun 25, 16:09 UTC10m
2026-06-25 N871ST - Jun 25, 14:20 UTCJun 25, 15:24 UTC1h 5m
2026-06-25 N871ST - Jun 25, 12:50 UTCJun 25, 13:14 UTC25m
2026-06-24 N871ST - Jun 24, 19:24 UTCJun 24, 19:55 UTC30m
2026-06-19 N871ST - Jun 19, 16:19 UTCJun 19, 16:44 UTC25m
2026-06-17 N871ST - Jun 17, 13:50 UTCJun 17, 14:35 UTC45m
2026-06-17 N871ST - Jun 17, 12:40 UTCJun 17, 13:05 UTC25m
2026-06-17 N871ST - Jun 17, 01:20 UTCJun 17, 03:30 UTC2h 10m
2026-06-16 N871ST - Jun 16, 23:10 UTCJun 17, 00:25 UTC1h 15m
2026-06-15 N871ST - Jun 15, 21:45 UTCJun 15, 22:35 UTC50m
2026-06-13 N871ST RDG → RDG Jun 13, 06:45 UTCJun 13, 08:30 UTC1h 45m
2026-06-13 N871ST - Jun 13, 00:45 UTCJun 13, 01:40 UTC55m
2026-06-12 N871ST - Jun 12, 19:50 UTCJun 12, 20:05 UTC15m
2026-06-12 N871ST - Jun 12, 16:00 UTCJun 12, 17:10 UTC1h 10m
2026-06-12 N871ST - Jun 12, 13:30 UTCJun 12, 15:20 UTC1h 50m
2026-06-12 N871ST - Jun 12, 11:55 UTCJun 12, 12:10 UTC15m
2026-06-11 N871ST HAR → RDG Jun 11, 17:45 UTCJun 11, 18:05 UTC20m
2026-06-11 N871ST - Jun 11, 16:40 UTCJun 11, 17:05 UTC25m
2026-06-09 N871ST - Jun 9, 18:35 UTCJun 9, 18:55 UTC20m
2026-06-09 N871ST RDG → RDG Jun 9, 17:10 UTCJun 9, 17:50 UTC40m
2026-06-08 N871ST - Jun 8, 22:55 UTCJun 8, 23:30 UTC35m
2026-06-08 N871ST - Jun 8, 16:15 UTCJun 8, 16:40 UTC25m

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 N871ST page for operator, model, and routing details .

Mode-S ABFBAF frequently asked

What is Mode-S code ABFBAF?
ABFBAF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N871ST.
Where is Mode-S ABFBAF registered?
Mode-S code ABFBAF 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 ABFBAF broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 21:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABFBAF, octal 52775657, decimal 11,271,087.
What flights does ABFBAF operate?
Mode-S ABFBAF has broadcast 1 distinct callsign, including N871ST.