Hi the chances are that if a company has obtained your number and you have not posted it on any web sites they are either using an automatic dialler or they have obtained your details via a list. Contact your telephone provider and you need to be listed XXD this service excluded survey calls and XD allows companies to call a number if they claim to be carrying out a survey.

Its either a spoof number or possibly an Indian Number without the Intl Dialling Code in front.

01587 has never been allocated in UK.

Making your phone ex directory want help if your number has been put on a bucket shop call centre auto dial system.

Registering with TPS can cut down these calls. http://www.tpsonline.org.uk/tps/number_type.html

New laws  to deal with these type of calls are being introduced. https://www.gov.uk/government/news/crackdown-on-nuisance-calls-to-make-marketing...

Most of these calls use AutoDialler's which just dial a series of numbers so for example 020 7123 4567 and then 020 7123 4568 etc etc until they get a live number.

It's a situation that's got well out of hand!

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As I’ve heard recently, there are various products and services that can help block nuisance calls, although you may need to pay to use them. Or I colleague of mine was investigating how to stop receiving such calls, so, she found hundreds of online complaints, petitions to sign, I think the more people will take such actions, the sooner some law will be issued to fight against nuisance calls & texts.