The international data hub for continuing resources, wrapped in a web interface
Our essential subscription service gives you full access to our web portal.
Working with periodicals?
We have the right tool for you.
As the world’s catalog for continuing resources, the ISSN Portal helps you identify and manage the publications you work with.
Access full ISSN Profile data
Find info about publisher, start year and end publication year, frequency, relationships, history, and much more.
Access full ISSN-L clusters
Each publication lives in a set of relationships. Find out what they are and how they evolve.
Use enhanced search filters
Quickly analyze and refine search results using multiple well thought-out filtering and sorting options.
Search and access ISSN-H clusters
Some continuing resources live a long life. Travel through this life with ISSN-H clusters.
Download in multiple formats
Download the records you need in Marc21, Unimarc and other interoperable formats to compare or apply your own processes.
Take advantage of family graphs
Benefit from a new way of looking at periodicals. Discover new things by interacting with family graphs.
Do you need a subscription?
Some of the ISSN Portal’s data and features are avalaible free of charge and no subscription needed. More advanced needs require a paid subscription.
Over 2.3 million confirmed ISSN records
Confirmed ISSN records are available for search and consultation.
Main record information
ISSN/ISSN-L, Key-title, Country, Language, Medium
Full archival information (Keepers)
Information about archival status of resources is fully available without subscription.
Full Open access information (ROAD)
Description of open access resources is fully available without subscription.
Full record information
Title proper, Other variant titles, Related title, Date, Publisher, Subject, Dewey, Links to the resources
Provisional and legacy records
All ISSN assigned before publication and old ISSN assigned before 1974
Relationships and history information
View and navigate related titles and publication history with ISSN-L and ISSN-H
Multiple display formats
View records in a labelled view, MARC21 or UNIMARC format.
Export records
Download ISSN records in MARC21, UNIMARC, MARC-XML, RDF/XML, RDF Turtle, Json.
Humans behind the data
Our team is here to help
ISSNs are not just numbers. As a client, you can always talk directly
with our thrustworthy team.
J'ai recours au portail ISSN plusieurs fois par semaine dans le cadre des validations CIDEMIS. J'utilise intuitivement la recherche simple qui est rapide et efficace, mais dans les cas les plus ardus j'exploite la recherche avancée pour flécher ma recherche. Je n'hésite pas communiquer avec ISSN/CIEPS via l'onglet Commentaires dans CIDEMIS et ai une réponse dans la semaine !
For us here at the Biblioteca de Catalunya, the ISSN data and the ISSN portal are more than just useful – they're absolutely essential for our day-to-day work as the centre that manages the ISSNs of the series published in Catalonia. We also receive series from all over the world and catalogue almost all of them at the full level, always including the ISSN and ISSN L in our records. It's really helpful to know the beginning or end of a series, any title changes, where it was published, who the publisher is, and how many editions there are.
More services
Do you need automated access or tailor-made services? We offer various
subscriptions.
Search API Access
Extend your service by connecting it to our Search API. Following the SRU standard, our API allows you to perform advanced search in the ISSN registry and download resulting records. ISSN Portal Access is included.
Automated OAI-PMH Sync
Automatically sync your database with the latest updates to the ISSN registry. Choose your sync frequency and scope to best fit your needs.
Automated OAI-PMH Sync
Submit ISSNs or Titles and get the corresponding metadata. Or submit your use case and see what we can do with your data.
Our Sales team can give you individualized guidance.