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:
“To a first approximation, the intentional strategy consists of treating the object whose behavior you want to predict as a rational agent with beliefs and desires and other mental states exhibiting what Brentano and others call intentionality.”
—Daniel Clement Dennett (b. 1942)
“Woman—for example, look at her case! She turns tantalizing inviting glances on you. You seize her. No sooner does she feel herself in your grasp than she closes her eyes. It is a sign of her mission, the sign by which she says to man: “Blind yourself, for I am blind.””
—Luigi Pirandello (1867–1936)