INDIANAPOLIS -- City officials are investigating confusion over how some taxi companies are routing calls.

Companies that operate in the city are required to have central dispatch locations, but code enforcement officials are investigating to ensure they consist of more than a network of cell phones.

6News' Joanna Massee attempted to visit Broad Ripple Village Taxi's headquarters at 3512 Rockville Road on Thursday, but it did not appear the company was located anywhere in the complex.

A man who answered the phone for Broad Ripple Village Taxi said the woman who usually works at the office was out sick and that he was helping her from home.

Freedom Cab company's headquarters also appeared elusive.

A driver from Freedom Cab arrived when Massee called a number listed by the city for a Broad Ripple Village Taxi Cab.

The same driver arrived again when Massee called a number city officials had listed for Midwest Taxi.

The man who answered at the number listed for Midwest Taxi said Massee had reached Indiana Taxi.

Code enforcement officials said they are currently investigating cab companies to ensure there is someone who can be held accountable for the business' operations.

"I think we as a department have concerns that some of these independent taxi associations are not complying with the specific requirements of their license, specifically that a company that is required to have a central dispatch location appears not to have one," said City Licensing Administrator Adam Collins.

Officials are in the process of reviewing all license applications for every taxi company in Marion County.

"As a result of that review, we're looking at these companies from the top down to determine whether or not the organization has shown a willingness to comply with all the ordinance requirements," Collins said. "Those that don't won't be with us in 2011."

All cabs are now required to post a passenger bill of rights.

Cab customers who aren't satisfied with the service they receive are urged to call 317-327-TAXI or e-mail taxi@indy.gov with the cab number, their complaint and contact information.

The city's crackdown on taxi cab complaints comes after visitors to downtown ranked cab drivers as their No. 1 complaint in a recent survey, citing issues with drivers' failure to speak English and lack of directional knowledge, refusal of credit cards, overcharging, unsafe driving and poor vehicle condition.