The iPhone that Jordan Wheldon was using to conduct his illicit dealing was seized by police when he was attested last year.
Teesside Crown Court heard home the mobile phone was used on at least 60 occasions to send out the block messages offering the Class a drug for sale.
Emma Atkinson, prosecuting, said the defendant had also used the same mobile phone to make doctor appointments and call insurance brokers.
She added: “The number was used to send out high volume block messages on an almost daily basis.”
The court heard how police recovered around £1,300 in cash from the defendant’s home when they searched his property.
Analysis of the iPhone showed that 40,213 text messages were sent in little over two months while the mobile was in the possession of the defendant.
Jordan Wheldon (Image: Cleveland Police)
Wheldon, of Beckenham Gardens, Middlesbrough, pleaded guilty to being concerned in the supply of Class A drug cocaine between March 5 and May 8 last year.
Nicci Horton, mitigating, said her client had started to deal to earn extra cash and fund his own habit but was now clean of the Class A use.
She said: “He admits that his drug use was problematic and he hid it from his friends and his partner, how much he was taking.
“When the opportunity arose to repay some of that get and get some free cocaine and make a bit extra on the side, he took it.”
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Judge Tom Mitchell locked the drug dealer up for three years after he pleaded guilty to the charge.
He said: “You were operating a mobile phone number to advertise the sale of drugs, that is the sale of cocaine. In total, there were more than 40,000 text messages that appear to have been sent in batches across 64 days.
“That’s an awful lot of people being contacted by you to see whether they are interested in buying cocaine. You were advertising it for sale in half-gramme deals, your name was associated with those messages and also when you were ultimately caught you had £1,300 on you.
“That is clearly your proceeds in your dealing in cocaine and being involved in that particular trade.”