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sensors Mode-S transponder

A34BD5

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N311PH · AIRBUS HELICOPTERS EC-135/635 · operated by PHI HEALTH LLC

Hex
A34BD5
Octal
50645725
Decimal
10,701,781
Country
US
Tail
N311PH
Type
EC35
No current signal · last broadcast Jul 26, 20:55 UTC
Flights observed
128
Distinct callsigns
1
Country
US
Last broadcast
Jul 26, 20:55 UTC

Last known position

Most recent position reported by Mode-S A34BD5.

Country allocation

The ICAO 24-bit address A34BD5 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
N311PH - 127 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N311PH - Jul 26, 20:05 UTCJul 26, 20:55 UTC50m
2026-07-26 N311PH - Jul 26, 19:20 UTCJul 26, 19:30 UTC10m
2026-07-26 N311PH - Jul 26, 17:45 UTCJul 26, 17:55 UTC10m
2026-07-26 N311PH - Jul 26, 16:45 UTCJul 26, 17:20 UTC35m
2026-07-26 N311PH - Jul 26, 04:50 UTCJul 26, 05:35 UTC45m
2026-07-26 N311PH - Jul 26, 04:05 UTCJul 26, 04:15 UTC10m
2026-07-26 N311PH - Jul 26, 03:20 UTCJul 26, 03:35 UTC15m
2026-07-25 N311PH - Jul 25, 12:20 UTCJul 25, 12:55 UTC35m
2026-07-25 N311PH - Jul 25, 03:35 UTCJul 25, 03:55 UTC20m
2026-07-25 N311PH - Jul 25, 01:50 UTCJul 25, 02:05 UTC15m
2026-07-24 N311PH - Jul 24, 21:45 UTCJul 24, 22:05 UTC20m
2026-07-24 N311PH - Jul 24, 21:00 UTCJul 24, 21:10 UTC10m
2026-07-24 N311PH - Jul 24, 14:40 UTCJul 24, 15:05 UTC25m
2026-07-24 N311PH - Jul 24, 05:35 UTCJul 24, 05:50 UTC15m
2026-07-22 N311PH - Jul 22, 23:10 UTCJul 23, 00:10 UTC1h 0m
2026-07-22 N311PH - Jul 22, 22:20 UTCJul 22, 22:40 UTC20m
2026-07-20 N311PH - Jul 20, 23:20 UTCJul 21, 00:10 UTC49m
2026-07-20 N311PH - Jul 20, 22:25 UTCJul 20, 22:35 UTC10m
2026-07-20 N311PH - Jul 20, 01:35 UTCJul 20, 01:55 UTC20m
2026-07-20 N311PH - Jul 20, 00:30 UTCJul 20, 00:50 UTC20m
2026-07-19 N311PH - Jul 19, 23:05 UTCJul 19, 23:15 UTC10m
2026-07-19 N311PH - Jul 19, 18:00 UTCJul 19, 19:00 UTC1h 0m
2026-07-18 N311PH - Jul 18, 04:45 UTCJul 18, 04:55 UTC10m
2026-07-18 N311PH - Jul 18, 03:25 UTCJul 18, 04:20 UTC55m
2026-07-18 N311PH - Jul 18, 00:10 UTCJul 18, 00:55 UTC45m
2026-07-17 N311PH - Jul 17, 21:44 UTCJul 17, 23:39 UTC1h 55m
2026-07-15 N311PH - Jul 15, 22:15 UTCJul 15, 22:25 UTC10m
2026-07-15 N311PH - Jul 15, 18:40 UTCJul 15, 19:25 UTC45m
2026-07-14 - - Jul 14, 19:10 UTCJul 14, 19:30 UTC20m
2026-07-14 N311PH - Jul 14, 17:40 UTCJul 14, 18:30 UTC50m
2026-07-12 N311PH - Jul 12, 19:50 UTCJul 12, 20:05 UTC15m
2026-07-08 N311PH - Jul 8, 19:50 UTCJul 8, 20:00 UTC10m
2026-06-30 N311PH - Jun 30, 03:45 UTCJun 30, 04:55 UTC1h 10m
2026-06-25 N311PH - Jun 25, 20:09 UTCJun 25, 20:19 UTC10m
2026-06-25 N311PH - Jun 25, 19:24 UTCJun 25, 19:34 UTC10m
2026-06-25 N311PH - Jun 25, 16:05 UTCJun 25, 16:14 UTC10m
2026-06-25 N311PH - Jun 25, 15:04 UTCJun 25, 15:20 UTC15m
2026-06-19 N311PH - Jun 19, 22:55 UTCJun 19, 23:04 UTC10m
2026-06-18 N311PH - Jun 18, 02:05 UTCJun 18, 02:15 UTC10m
2026-06-18 N311PH - Jun 18, 01:15 UTCJun 18, 01:30 UTC15m
2026-06-17 N311PH - Jun 17, 23:50 UTCJun 18, 00:25 UTC35m
2026-06-17 N311PH - Jun 17, 21:50 UTCJun 17, 22:40 UTC50m
2026-06-17 N311PH - Jun 17, 16:00 UTCJun 17, 17:25 UTC1h 25m
2026-06-17 N311PH - Jun 17, 14:50 UTCJun 17, 15:05 UTC15m
2026-06-16 N311PH - Jun 16, 00:00 UTCJun 16, 00:15 UTC15m
2026-06-15 N311PH - Jun 15, 23:09 UTCJun 15, 23:25 UTC15m
2026-06-14 N311PH - Jun 14, 00:15 UTCJun 14, 01:00 UTC45m
2026-06-13 N311PH - Jun 13, 22:05 UTCJun 13, 22:55 UTC50m
2026-06-13 N311PH - Jun 13, 17:05 UTCJun 13, 17:20 UTC15m
2026-06-13 N311PH - Jun 13, 16:25 UTCJun 13, 16:40 UTC15m

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 N311PH page for operator, model, and routing details .

Mode-S A34BD5 frequently asked

What is Mode-S code A34BD5?
A34BD5 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N311PH.
Where is Mode-S A34BD5 registered?
Mode-S code A34BD5 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 A34BD5 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A34BD5, octal 50645725, decimal 10,701,781.
What flights does A34BD5 operate?
Mode-S A34BD5 has broadcast 1 distinct callsign, including N311PH.