For the second year in a row, the Federal Communications Commission (FCC) confirmed what our customers already know — the best and most consistent nationwide broadband experience is available on Xfinity Internet. The FCC today released its second Measuring Broadband America report on ISP performance. For Xfinity customers, we again delivered more than our advertised speeds for the second year in a row. In fact, Xfinity Internet was the only cable company or DSL provider to exceed advertised speeds in both the 2011 and 2012 studies.
Last summer, the FCC released its first comprehensive study of broadband performance in the U.S. The 2011 and 2012 studies are the result of an innovative and transparent public-private partnership between the FCC, its contractor SamKnows, ISPs, and the Google-affiliated M-Labs test-servers. In the 2011 report, the FCC found that ISPs in America largely delivered on their advertised speeds, and we were happy to report that on average Comcast's Xfinity Internet service exceeded our advertised speeds.
Once again the FCC has found that Xfinity Internet customers participating in the testing experienced, on average, upload and download speeds exceeding our advertised speeds on every Xfinity Internet tier the FCC tested and at any time of the day or night, including during peak periods.
Delivering on our advertised speeds is only part of the story. The FCC's report also found that average speeds across all ISPs went up almost 23% since last year, as ISPs offer faster tiers and more consumers subscribe to those tiers. But this is not news to our customers. Over the last several years Xfinity Internet speeds tiers have been going up dramatically as we introduced 50 Mbps and 105 Mbps tiers. Today, our 105 Mbps tier is available to over 90 percent of our footprint.
The FCC's report validates our efforts and investments to date, but we're not stopping here: we plan to introduce additional, faster speed tiers in the near future, and we continue to invest in our network to make sure we're giving our customers more options to meet their Internet needs.