The city’s 311 system is such a mess that many complaints get reported as “addressed” – even before they’re submitted, officials said.

After examining more than 2.5 million calls to the hotline last year, the city council released some startling findings Monday showing that some agencies report problems corrected before they happened.

For example, more than 20 percent of 311 rodent complaints to the Health Department were marked as “addressed” on dates before they were called in.

“How is that even possible?” asked a perplexed Council Speaker Corey Johnson.

He also pointed to other odd glitches – including that nearly all 311 complaints to the Taxi and Limousine Commission and Department of Health “are technically marked closed but appear to be ongoing.”

“Based on the data, we unfortunately don’t know where, how or even if many complaints were actually resolved,” he said.

Johnson said a staggering 99 percent of TLC complaints and 74 percent of Finance Department 311 calls appeared to be “open” because the agencies’ descriptions for resolving cases is too fuzzy.

For instance, the TLC normally marks a complaint as closed even when the only “resolution” documented is promising to contact a complainant within two weeks for additional information.

Administration officials insisted that despite the data glitch, complaints are actually being resolved.

Joe Morrosroe, executive director of 311, said his department is “working to improve” the system.

Councilman Robert Holden (D-Queens) has introduced a bill requiring 311 to indicate publicly when its unable to respond to service complaints.

Morrosroe said the de Blasio administration can’t support the bill because 311 has a “wide range of service-level agreements” with different time frames.

“As such, 311 is unable to follow an agency’s workflow process … and accurately provide a disposition for service requests that have not been marked ‘closed’” he said. “We rely on our agencies to do that.”