STATE NAME FOR VEHICLE EDIT MOBILE NUMBER Check out whether our number is registered in RC book This facility is available in Uttar Pradesh, Jharkhand, Rajasthan, Assam, Tripura, Himachal Pradesh, Bihar, Tamil Nadu, Odisha, Karnataka, Chhattisgarh, Kerala, Uttarakhand. In case your vehicle is registered in any of these state then only you can avail this facility. https://vahan.parivahan.gov.in/vahanservice/vahan/ui/otherservices/editMobileNumber.xhtml From RTOseva4u: contact us @9082264979 / 9082974274 Happy to help