Open links to jump to page content


Offer your customers the best service possible

With the BT Directory Solutions (BTDS) OSIS Database, you can give your customers a high-quality directory enquiries service. In fact, you can give them the most comprehensive number database in the UK.

Extensive database

We can offer you the most comprehensive information source for UK directory enquiries – something you won’t find with any other supplier. Our directory information database, OSIS, holds more than 26 million residential and business names, addresses and telephone numbers. OSIS is maintained to the highest standards and is regularly updated from the records of over 70 UK communications.

Complete confidence

Whether you provide a Directory Enquiries 118 service, distribute information via bureau services or supply an online, CD-ROM or printed phone book, with BTDS you can be totally confident in the quality of the information you provide.

Benefits for you

Working together


The OSIS database is updated on a daily basis so you’ll benefit from new, ceased and amended data entry information.

Men with many screens


 This data is not available from any other source and is exclusive to BT Wholesale.

Men working


BTDS collates and maintains directory information to the highest standards to give you a reliable and accurate number information database.

Man demonstrating work on large screens


As a BTDS customer, you can use extracts of OSIS to create an innovative directory of products and services.

Contact us

Contact our sales team online
about your enquiry. 

Get in touch if you'd like us to call
you back about a sales enquiry. 

Call us for sales enquiries about
our products and services.