Registration is State specific. If supply is made from different States, separate registration. It is clear from Sections 22 and 25 of CGST Act.
SECTION 22. Persons liable for registration. - (1) Every supplier shall be liable to be registered under this Act in the State or Union territory, other than special category States, from where he makes a taxable supply of goods or services or both, if his aggregate turnover in a financial year exceeds twenty lakh rupees
SECTION 25. Procedure for registration. - (1) Every person who is liable to be registered under section 22 or section 24 shall apply for registration in everysuchState or Union territory in which he is so liable within thirty days from the date on which he becomes liable to registration, in such manner and subject to such conditions as may be prescribed :