Call signs in North America

==Mexico==
{{main|Call signs in Mexico}} 
Mexican broadcast stations are assigned call signs beginning with "XE" (for [[mediumwave]] and [[shortwave]] stations) or "XH" (for [[FM broadcasting|FM radio]] and [[television station]]s), followed by one and up to five letters and a suffix according to the band in which they broadcast, these suffixes are: "-AM", "-OC" (shortwave or ''Onda Corta''), "-FM" and "-TDT" (Terrestrial Digital Television). The "-OL" ([[longwave]] or ''Onda Larga'') and "-TV" suffixes are currently phased out as those bands are no longer used. Some FM and television stations have call signs beginning with "XE", usually reserved for AM radio stations. Most of these "XE" cases in FM and television stations were solicited by the concessionaires themselves so the stations would have the same call sign as an existing AM station (as it is the case of [[XEW-AM]], [[XEW-TV]] and [[XEW-FM]], all founded and owned by the [[Azcárraga family]]), while others are for disambiguation (like [[XHTV-TV]] and [[XETV-TV]] or [[XEIMT-TV]] and [[XHIMT-TV]]). All TV stations originally assigned with the "-TV" suffix, had been given the "-TDT" suffix as they made the [[digital switchover]].<br />

Television stations are required to identify every 30 minutes; there has been no equivalent requirement in radio since 2014. Television [[rebroadcaster]]s are assigned the call signs of the station they are licensed to retransmit; for instance, [[XEZ-TDT]], located on Cerro El Zamorano in [[Querétaro]], has a repeater on Cerro Culiacán serving [[Celaya]], [[Guanajuato]], which is also XEZ-TV. [[Digital subchannels]] are not assigned a distinctive call sign, they keep the call sign of the station. The technical guidelines for digital television stations stipulate the use of [[PSIP]] short names matching the parent station (e.g. [[XHTDMX-TDT|XHTDMX]]2, XHTDMX3).

[[Amateur radio]] stations in Mexico use "XE1" for the central region, "XE2" for the northern region, and "XE3" for the southern region. "XF" prefixes indicate islands. "XF4" is usually used for the [[Revillagigedo Islands]] and nearby islets. Special call signs for contests or celebrations are occasionally issued, often in the 4A and 6D series, although these will follow the usual district numbering system (4A3 for the south, etc.).