|Broadcast area||Bangor, Maine|
|Slogan||Maine's Adult Alternative|
|First air date||November 1980 (as WDME-FM)|
|Format||Adult album alternative|
|Callsign meaning||W Z LOft|
|Former callsigns||WDME-FM (1980–2009)
|Owner||The Zone Corporation|
|Sister stations||WKIT-FM, WZON|
The station signed on in November 1980 as WDME-FM, simulcasting the middle-of-the-road format of its sister AM station (1340 AM), which had begun on August 13, 1967. The AM station was closed down, and its license allowed to expire, in 1991 for economic reasons. Later, WDME-FM was an eclectic adult contemporary station.
Under its previous ownership, WDME referred to itself on-air as, "The only radio station in the world broadcasting from a railroad passenger car." WDME's studios were located in a converted Amtrak coach formerly situated beside Routes 6 and 15 to the north and west of Dover-Foxcroft. The station was known for its folksy portrayal of rural culture in the north woods of Maine. It featured locally-known personalities such as John Simcoe and Paul Knaut.
WDME was purchased by The Zone Corporation in 2001. Gradually, the station changed to an adult album alternative format before becoming a simulcast of WZON, a sports radio station, in 2009. The WZON-FM call letters were adopted on August 27.
WZON-FM switched to a progressive talk format on January 4, 2010 The station also carried Boston Red Sox baseball; shortly after WZON AM began simulcasting WZON-FM on November 1, 2010, Sox games were moved exclusively to the AM station (which previously shared the broadcasts with WDME/WZON-FM). WZON-FM began stunting with Christmas music in November 2012, with the previous format moving exclusively to WZON AM. The call letters were changed to WZLO on November 23, and the station returned to an adult album alternative format, branded as "103.1 WZLO," on December 26, 2012.
- "WZLO Facility Record". United States Federal Communications Commission, audio division.
- Broadcasting Yearbook 1981 (PDF). 1981. p. C-104. Retrieved February 20, 2010.
- Fybush, Scott. "Maine Radio History, 1971–1996". Archives @ BostonRadio.org. Retrieved February 20, 2010.
- Neff, Andrew (November 12, 1993). "Hirsch sells Dover-Foxcroft radio station". Bangor Daily News. Retrieved February 21, 2010.
- "Call Sign History". CDBS Public Access. Federal Communications Commission. Retrieved November 26, 2012.
- Hayward, Meghan (December 31, 2009). "WZON 103.1 New Format". WABI TV5. Retrieved January 1, 2010.