What is the phone number for the gas station customer service? Our customer service number is 800-700-2443. Our call center is currently closed. You may still schedule a time for us to call when we open. If you prefer, we can call you. If you smell gas or have an emergency, leave the area immediately, then call 911 and 800-959-5325. If your need is not as critical, please use our email form.How do i contact one gas? ONE Gas Investor Relations Department. Investor Relations Department ONE Gas, Inc. P.O. Box 21049 Tulsa, Ok 74121. Phone: 855-496-0200 Email: IR@ onegas.com ONE Gas Media ContactWhat does oneone gas do? ONE Gas provides natural gas distribution services to more than 2 million customers in Oklahoma, Kansas and Texas.