Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

ABF515

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N87ME · AIRBUS HELICOPTERS EC-145 · operated by CENTER FOR EMERGENCY MEDICINE OF WESTERN PA

Hex
ABF515
Octal
52772425
Decimal
11,269,397
Country
US
Tail
N87ME
Type
EC45
No current signal · last broadcast 11h ago
Flights observed
22
Distinct callsigns
1
Country
US
Last broadcast
11h ago

Last known position

Most recent position reported by Mode-S ABF515.

Country allocation

The ICAO 24-bit address ABF515 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
N87ME - 22 2026-04-18

Recent flights last 22

DateFlightRouteTakeoffLandingDuration
2026-04-18 N87ME - Apr 18, 07:30 UTCApr 18, 07:40 UTC10m
2026-04-18 N87ME - Apr 18, 06:25 UTCApr 18, 06:35 UTC10m
2026-04-18 N87ME - Apr 18, 04:35 UTCApr 18, 04:50 UTC15m
2026-04-18 N87ME - Apr 18, 03:25 UTCApr 18, 03:35 UTC10m
2026-04-17 N87ME - Apr 17, 21:45 UTCApr 17, 23:10 UTC1h 25m
2026-04-17 N87ME - Apr 17, 05:55 UTCApr 17, 06:45 UTC50m
2026-04-17 N87ME - Apr 17, 04:55 UTCApr 17, 05:15 UTC20m
2026-04-16 N87ME - Apr 16, 16:55 UTCApr 16, 17:10 UTC15m
2026-04-16 N87ME - Apr 16, 15:45 UTCApr 16, 16:00 UTC15m
2026-04-16 N87ME - Apr 16, 15:00 UTCApr 16, 15:10 UTC10m
2026-04-16 N87ME - Apr 16, 13:30 UTCApr 16, 14:25 UTC55m
2026-04-16 N87ME - Apr 16, 03:30 UTCApr 16, 04:24 UTC55m
2026-04-16 N87ME - Apr 16, 01:30 UTCApr 16, 01:55 UTC25m
2026-04-16 N87ME - Apr 16, 00:05 UTCApr 16, 00:25 UTC20m
2026-04-15 N87ME - Apr 15, 23:10 UTCApr 15, 23:25 UTC15m
2026-04-15 N87ME - Apr 15, 21:35 UTCApr 15, 21:50 UTC15m
2026-04-14 N87ME - Apr 14, 18:00 UTCApr 14, 18:20 UTC20m
2026-04-14 N87ME - Apr 14, 17:40 UTCApr 14, 17:55 UTC15m
2026-04-14 N87ME - Apr 14, 16:50 UTCApr 14, 17:05 UTC15m
2026-04-14 N87ME - Apr 14, 12:50 UTCApr 14, 12:55 UTC5m
2026-04-12 N87ME - Apr 12, 19:50 UTCApr 12, 20:15 UTC25m
2026-04-12 N87ME - Apr 12, 18:40 UTCApr 12, 19:05 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 N87ME page for operator, model, and routing details .

Mode-S ABF515 frequently asked

What is Mode-S code ABF515?
ABF515 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N87ME.
Where is Mode-S ABF515 registered?
Mode-S code ABF515 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 ABF515 broadcasting right now?
No active broadcast right now. Last signal was 11h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABF515, octal 52772425, decimal 11,269,397.
What flights does ABF515 operate?
Mode-S ABF515 has broadcast 1 distinct callsign, including N87ME.