Comcast today said it will increase Internet speeds for some of its customers in the Northeast at no extra charge.

Those who subscribe to Comcast's Blast tier will get a bump from 105 Mbps to 150 Mbps. The ISP is also adding a new Performance Pro tier of 75 Mbps, and those who subscribe to an eligible Xfinity Triple Play bundle will see their Internet speed increase from 25 Mbps to 75 Mbps.

Comcast said the speed boosts will roll out to the "vast majority" of new and existing customers starting later this month. Users might have to restart their modems to get things rolling. Others might have old modems that can't handle these new speeds; Comcast will notify you if yours needs to be swapped out.

"Today, our customers simultaneously connect to the Internet through multiple smartphones, tablets and laptops, and whether it's to stream, shop, video chat, upload photos or do homework, we're committed to ensuring they get the best overall experience with blazing fast speeds and the most Wi-Fi coverage, all delivered over our state-of-the-art network," Kevin Casey, president of Comcast Cable's Northeast Division, said in a statement.

Comcast's Northeast footprint covers 14 states from Maine to Virginia and the District of Columbia. Last year, the region got a similar boost: Blast jumped from 50 Mbps to 105 Mbps, while Xfinity Extreme 105 increased to 150 Mbps from 105 Mbps.

Also today, Comcast expanded its X1 cloud DVR service to Central California, including Chico, Fresno, Marysville/Yuba City, Merced, Modesto, Sacramento, Santa Barbara County, Stockton, and Visalia metro areas. The technology allows customers to stream content they have stored on a DVR from any device with an Internet connection while at home or on the go. They can also download content for offline viewing, like on a plane. It rolled out to the San Francisco Bay Area and Houston in October, and is also available in Atlanta, Baltimore, Boston, Chicago, Philadelphia, and Washington D.C.

In recent years, traditional ISPs have hustled to boost speeds in an effort to compete with gigabit offerings like Google Fiber. Comcast, for example, is rolling out Gigabit Pro, which promises speeds up to 2 Gbps. For now, it's coming to California, Atlanta, Chattanooga, and the Miami, Fort Lauderdale, and West Palm areas in Florida.

Earlier this year, meanwhile, Comcast lost its bid to acquire Time Warner Cable, which is now trying to merge with Charter and Bright House.