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:
“Within the university ... you can study without waiting for any efficient or immediate result. You may search, just for the sake of searching, and try for the sake of trying. So there is a possibility of what I would call playing. It’s perhaps the only place within society where play is possible to such an extent.”
—Jacques Derrida (b. 1930)
“Intolerance is the “Do Not Touch” sign on something that cannot bear touching. We do not mind having our hair ruffled, but we will not tolerate any familiarity with the toupee which covers our baldness.”
—Eric Hoffer (1902–1983)