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Getting a Call Sign

A Call Sign is defined by Merriam-Webster as a combination of identifying letters, letters and numbers, or words assigned to an operator, office, activity, vehicle, or station for use in communication (as in the address of a message sent by radio).

For amateur radio call signs in the Philippines, it is assigned and regulated by the National Telecommunications Commission (NTC).

To obtain a Call Sign, individuals must pass an NTC Examination and apply for a license.

Call Signs are assigned based on NTC Office Order No. 108-12-2012 and NTC Office Order No. 183-12-2016, as follows:

A Call sign is composed of three parts:

  1. prefix
  2. amateur radio district number
  3. suffix


The prefixes 4F, DU, DV, DW, DX, DY and DZ are sub-allocated to amateur radio service as follows:

DU, 4F or 4E – Extra Class (Class A)
DV or 4I – General Class (Class B)
DW or 4G – Technician Class (Class C)
DY or 4H – Foundation Class (Class D)
DX or DZ – Club Station, DXpedition and Special Events

Amateur Radio District Number:

It is a number representing the amateur district in which the amateur radio station is located. In the case of a CHARL member with station location in Bohol applies for a license, the NTC Region 7 Office will assign a district number of “7”.


The suffix shall be a minimum of two (2) characters and a maximum of three (3) characters. The suffixes AA to ZZZ are allocated in every district and assigned to a radio station.

For Example:

DV – prefix, 7 – amateur radio district, BFO – suffix

DX – prefix, 7 – amateur radio district, BC – suffix