The National Science Library in New Delhi serves as India's National Centre for ISSN, having been designated in 1986 to assign ISSNs to serial publications published in India. Over 28 years it has assigned ISSNs to over 18,000 serials. It maintains records of ISSNs in online and print formats and regularly updates assigned ISSN details on its website. The Centre works to avoid duplication and provide public access to ISSN records according to International ISSN Network policies and guidelines.