I am verifying the answers generated by an automatic system to the following question: what is prefix phone number
Suggested answer: As telephone technology advanced, the precise significance of the prefix became blurred in many places; 485 in London, UK, was once the GULliver exchange, but now 44207485xxxx is just considered one of many number blocks served by the CLKEN Kentish Town exchange; 4420770703xx is another.
Should I validate this answer?
