If you want to quickly find phone numbers of companies or individuals of certain standing then you could do so online as there are a number of websites that specialize in providing phone numbers of different companies that you could take advantage of. All you have to do is go online and identify such websites that could be of assistance to your needs. The internet is full of resources of all types including company details, information together with reviews and ratings that you could benefit from when you have a need for the same.
You should therefore be looking for such websites as www.allphonenumbers.co.uk and bookmarking them for all of your future references. It becomes difficult to keep looking for a new website every time you have a need for a company telephone number. It would therefore be a better option to look for a website once by even spending time to arrive at the right the resource that you could be using over and over again for all of your existing and future requirements.
You will however have to be specific with the country that you would like to find contact detail information for companies for. So if you are from the UK then you may want to look for a website that lists down telephone numbers of UK companies instead of going for those that provide information about US companies for example.