I loaded the links from my linkblog from 2011 to November 2020 into a MySQL database. These are the most frequently cited domains.
+---------------------------+---------------+ | domain | count | +---------------------------+---------------+ | nytimes.com | 5702 | | scripting.com | 3764 | | washingtonpost.com | 1082 | | theguardian.com | 897 | | nymag.com | 757 | | qz.com | 659 | | youtube.com | 649 | | vox.com | 628 | | axios.com | 615 | | politicalwire.com | 604 | | theatlantic.com | 576 | | politico.com | 562 | | theverge.com | 553 | | guardian.co.uk | 538 | | slate.com | 514 | | talkingpointsmemo.com | 510 | | threads2.scripting.com | 492 | | wired.com | 429 | | techcrunch.com | 403 | | newyorker.com | 368 | | en.wikipedia.org | 366 | | bloomberg.com | 358 | | flickr.com | 339 | | arstechnica.com | 300 | | nypost.com | 298 | | nydailynews.com | 296 | | reuters.com | 295 | | businessinsider.com | 276 | | cnn.com | 260 | | torrentfreak.com | 241 | | podcatch.com | 240 | | buzzfeed.com | 239 | | thedailybeast.com | 236 | | gigaom.com | 235 | | thehill.com | 223 | | dave.pocalyp.se | 218 | | latimes.com | 217 | | npr.org | 214 | | salon.com | 211 | | github.com | 208 | | news.cnet.com | 208 | | motherjones.com | 203 | | reason.com | 203 | | gawker.com | 199 | | m.youtube.com | 190 | | gizmodo.com | 183 | | twitter.com | 181 | | fivethirtyeight.com | 176 | | medium.com | 173 | | huffingtonpost.com | 170 | | rollingstone.com | 160 | | ny.curbed.com | 158 | | apnews.com | 156 | | recode.net | 155 | | trump.pocalyp.se | 152 | | facebook.com | 145 | | bbc.co.uk | 143 | | engadget.com | 142 | | nbcnews.com | 138 | | niemanlab.org | 137 | | google.com | 134 | | en.m.wikipedia.org | 132 | | fastcompany.com | 130 | | thenextweb.com | 130 | | bits.blogs.nytimes.com | 129 | | evgrieve.com | 129 | | vanityfair.com | 127 | | thinkprogress.org | 126 | | bbc.com | 126 | | static.scripting.com | 125 | | blogs.law.harvard.edu | 122 | | news.ycombinator.com | 121 | | threads.scripting.com | 118 | | usatoday.com | 114 | | liveblog.co | 113 | | reader.liveblog.co | 111 | | cjr.org | 104 | | poynter.org | 104 | | berkeleyside.com | 100 | | krugman.blogs.nytimes.com | 100 | | cbsnews.com | 98 | | cnbc.com | 97 | | amazon.com | 94 | | dave.smallpict.com | 93 | | mediaite.com | 93 | | amp.cnn.com | 91 | | blogs.villagevoice.com | 91 | | online.wsj.com | 91 | | maps.google.com | 91 | | espn.go.com | 90 | | esquire.com | 89 | | aljazeera.com | 89 | | telegraph.co.uk | 88 | | thecannabist.co | 87 | | abc.net.au | 86 | | laughingsquid.com | 86 | | technologyreview.com | 86 | | truth-out.org | 84 | | economist.com | 83 | | wsj.com | 82 | +---------------------------+---------------+