Unallocated and Unavailable Call Sign Prefixes
Unallocated: The following call sign prefixes are available for future allocation by the ITU. (x represents any letter; n represents any digit from 2–9.)
- E6, E8, E9, H5, J9, On, S4, T9*, Un, V9, Xn, YZ*, Z4–Z9, 4N*.
(* Indicates a prefix that has recently been returned to the ITU.)
Unavailable: Under present ITU guidelines the following call sign prefixes shall not be allocated . They are sometimes used unofficially - such as amateur radio operators operating in a disputed territory or in a nation state that has no official prefix (e.g. S0 in Western Sahara or station 1A0 at Knights of Malta headquarters in Rome). (x represents any letter; n represents any digit from 2–9.)
- nn, x0, x1, 0x, 1x, Qx.
- no prefixes beginning with Q are used—they may be confused with Q codes.
- no prefixes with the digits 1 or 0 are used—they may be confused with the letters I or O.
- two digit prefixes (nn) are not as yet considered by the ITU.
Read more about this topic: ITU Prefix
Famous quotes containing the words call and/or sign:
“... it is an uneasy lot at best, to be what we call highly taught and yet not to enjoy: to be present at this great spectacle of life and never to be liberated from a small hungry shivering self—never to be fully possessed by the glory we behold, never to have our consciousness rapturously transformed into the vividness of a thought, the ardour of a passion, the energy of an action, but always to be scholarly and uninspired, ambitious and timid, scrupulous and dim-sighted.”
—George Eliot [Mary Ann (or Marian)
“Whether he admits it or not, a man has been brought up to look at money as a sign of his virility, a symbol of his power, a bigger phallic symbol than a Porsche.”
—Victoria Billings (b. 1945)