Nebraska Service Center has jurisdiction over the following states: Alaska, Colorado, Idaho, Illinois, Indiana, Iowa, Kansas, Michigan, Minnesota, Missouri, Montana, Nebraska, North Dakota, Ohio, Oregon, South Dakota, Utah, Washington, Wisconsin, and Wyoming.
California Service Center has jurisdiction over the following states: Arizona, California, Guam, Hawaii, and Nevada.
Texas Service Center has jurisdiction over the following states: Alabama, Arkansas, Florida, Georgia, Kentucky, Louisiana, Mississippi, New Mexico, North Carolina, Oklahoma, South Carolina, Tennessee, and Texas.
Vermont Service Center has jurisdiction over the following states: Connecticut, Delaware, Maine, Maryland, Massachusetts, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Vermont, Virginia, Washington DC., and West Virginia.
Vermont Service Center also has jurisdiction over the following CIS offices: Puerto Rico, Bermuda, Toronto, Montreal, Virgin Islands, and the Dominican Republic.
Check your case processing times here: https://egov.uscis.gov/processing-times/