A federal appeals court today sided with the Federal Communications Commission, upholding its view broadband service is an essential utility that can no longer be left unregulated and open to the whims of large cable and phone companies.

The 2-1 decision by the U.S. Court of Appeals for the District of Columbia firmly establishes the FCC’s right to transition broadband from its old designation as a barely regulated “information service” to a “telecommunications service” subject to broad oversight by regulators under the FCC’s “Title II” authority.

The most immediate implication of the court’s decision is upholding the FCC’s Net Neutrality rules, which require Internet providers to grant equal access to all legal Internet content and applications regardless of the source, without favoring or blocking particular products or websites.

“After a decade of debate and legal battles, today’s ruling affirms the commission’s ability to enforce the strongest possible Internet protections — both on fixed and mobile networks — that will ensure the Internet remains open, now and in the future,” said FCC chairman Tom Wheeler.

The ruling left broadband providers smarting, especially wireless carriers that once expected to be exempted from Net Neutrality regulations. Wireless broadband services are now also considered common carrier utility services subject to Net Neutrality.

“The people have spoken, the courts have spoken and this should be the last word on Net Neutrality,” Free Press President and CEO Craig Aaron said in a statement.

At least one Republican FCC commissioner, Ajit Pai, disagreed and was heartened by news a very disappointed AT&T was vowing a quick appeal to the Supreme Court.

“We have always expected this issue to be decided by the Supreme Court, and we look forward to participating in that appeal,” said David McAtee II, the senior executive vice president and general counsel for AT&T.

“I continue to believe that these regulations are unlawful, and I hope that the parties challenging them will continue the legal fight,” Pai added. Pai has been a frequent critic of Net Neutrality.

But AT&T may find itself in the unenviable position of taking their case to the Supreme Court without the late Antonin Scalia on the bench. The ongoing opposition by Senate Republicans to hold hearings to consider President Obama’s nomination of Merrick Garland to fill the open ninth seat on the court opens the door to a 4-4 tie vote on the FCC’s authority to regulate broadband as a utility, which would automatically affirm the lower court ruling.