SELECT Contact.Id
FROM Contact
INNER JOIN Phone ON Phone.ContactId = Contact.Id AND CONTAINS(Phone.Number, '"519-777*"')
WHERE Contact.Deleted = 0 AND Contact.CompanyId = 237

SELECT Contact.Id
FROM Contact
INNER JOIN Phone ON Phone.ContactId = Contact.Id AND Phone.Number LIKE '519-777%'
WHERE Contact.Deleted = 0 AND Contact.CompanyId = 237