MSNBC, Fox News, ABC, CBS and NBC have dedicated no time to covering the Stop Online Piracy Act in their evening newscasts since Oct. 1, according to a report by Ben Dimiero of Media Matters For America.

CNN, meanwhile, has dedicated a single evening news segment to the issue. All of the companies covered in the report have either publicly supported SOPA or have parent companies that have done so.

Dimiero based his report on Lexis-Nexis searches which includes transcripts of nighttime newscasts.

Comcast/NBCUniversal (which owns MSNBC and NBC News), Viacom (CBS), News Corporation (Fox News), Time Warner (CNN) and Disney (ABC) are all listed as supporters of the bill. ABC and CBS are also listed as separate supporters of the bill.

SOPA would block access to sites accused of violating U.S. copyright laws. The measure has been called Draconian by opponents who say it would fundamentally change the free-flow of information across the Internet. Proponents, ranging from the NBA to Universal, say the measure is needed to block sites which flagrantly flaunt copyright laws and make content available for free without paying copyright owners.

Traditional media companies have been key players in lobbying for SOPA's passage, with more than half of that funding coming from cable television providers, commercial TV and radio stations, and the entertainment industry. Opponents of the legislation have been developing apps to help voters track how their legislators stand on SOPA and how much they have received in campaign donations from SOPA-supporting entities.