Members of OurDC call senators on their cell phones as they stage a sit-in at the office of U.S. Senate Minority Leader Sen. Mitch McConnell (R-KY) November 3, 2011. (Photo by Alex Wong/Getty Images)

Since Donald Trump took office on January 20, inbound calls to Congress have increased 164 percent for a total of 771,300 calls during his first 30 days, according to a new report from a caller profile company.

Hiya, which “scans more than 3.5 billion calls per month globally and references a database of over 1.5 billion numbers to identify incoming and outgoing calls,” detected a spike in calls to Capitol Hill. The estimates corroborate anecdotal evidence about higher call volume from congressional offices. During the first 30 days, there’s been an average of 25,700 daily cell phone calls.

Of those calls, Hiya estimates 43 percent of them went to 10 offices—the Senate Committee on Homeland Security (92,100 mobile calls), Capitol Switchboard (57,800), House Switchboard (32,900), N.C. Senator Thom Tillis (30,900), Calif. Senator Dianne Feinstein (24,300), House Speaker Paul Ryan (22,100), Pa. Senator Pat Toomey (21,200), Texas Senator John Cornyn (18,900), Ohio Senator Rob Portman (17,800), and Fla. Senator Marco Rubio (14,800).

Other than Feinstein, all of the offices that made the list are Republican.

Graphic courtesy of Hiya.

Indivisible, a guide by former congressional staffers that has become a protest movement, outlines mass calls to legislative offices as an advocacy tactic.

Hiya also analyzed how the calls lined up with news events during the new administration. identifying call surges during the Women’s March, the appointment of Steve Bannon to the National Security Council, the travel ban, and before the vote to confirm Betsy DeVos as education secretary.

Graphic courtesy of Hiya.

In one graph of particular interest to D.C. audiences, Hiya shows House Oversight Committee Chair Jason Chaffetz (R-UT), who found himself on the receiving end of Washingtonian’s phone calls after his meddling . You can see that small spike, which picks up around day 11.

Graphic courtesy of Hiya.

Chaffetz’s number of incoming mobile calls eclipses House Speaker Ryan’s in a major way around February 13, as General Mike Flynn resigned as National Security Advisor. The Utahn tasked his oversight committee with blocking a D.C. law rather than investigating Flynn’s ties to Russia. “It’s taking care of itself,” Chaffetz said of the Flynn probe.

Calls to Congress Report by Rachel Kurzius on Scribd

Updated headline to reflect that calls are up 164 percent.