The old non-emergency number for Devon and Cornwall Police will be switched off completely on Sunday 2 September.
The 08452 777444 number was replaced with 101 in September 2011, as part of a national roll-out.
The 101 number was introduced to make it easier for the public to remember the number to contact police in a non-emergency.
Calls to 101 only cost 15 pence from a landline or mobile phone, no matter what time of day, where you are calling from in England and Wales or how long the call lasts.
People should call 101 when a crime has already happened, to give information about a crime or to speak to your local officer. The number is available 24 hours a day, seven days a week.
101 should not be used for emergencies. The 999 number is still the number to call in emergency situations where life is threatened, people are injured, offenders are nearby or if immediate action is required with an urgent response.
Calls to the 101 number have been steadily increasing since its introduction. In July two thirds of non-emergency calls for Devon and Cornwall Police were taken via 101. 21,075 people called the 08452 number whereas 44,201 people called 101. This figure was around 10,000 more than in April, when 34,237 people called 101.
Callers reporting non-emergency matters may experience delays at peak times when calling 101. If this happens they should either wait until their call is answered (the call will cost no more than 15 pence) or try again later. Alternatively non-urgent crime can be reported online via www.devon-cornwall.police.uk or by email@example.com.
Superintendent Craig Downham, Head of Call Management and Communications, said: “The 101 number is much easier for people to remember than the 08452 number we had before, and it only costs 15 pence.
“The two numbers have been running alongside each other for the last year but the 08452 number will now be switched off and we urge people to pass the message on about using 101 for all police non-emergencies.”
More information about contacting the police can be found at www.devon-cornwall.police.uk.