James Frost, 29, targeted girls as young as 12 over the internet persuading them to send him indecent photographs of themselves as well as supplying drugs including cocaine and M Cat to the youngsters.
He also carried on contacting girls even after being arrested and given police bail.
Mark Van der Zwart, prosecuting, said that Frost told the girls he was of similar age to them and hid his true identity by using false names and profile pictures of young boys.
On one occasion he claimed to be a 12-year-old boy to contact a girl of the same age and used a picture of a lad of that age to back up his story.
In total he targeted 16 young girls aged between 12 and 17 on dates between June 2011 and August 2013.
Mr Van der Zwart said that Frost used a mixture of flattery, coercion and insults in his contact with the youngsters and some indecent photographs of them were later found on his mobile phones.
Frost, of no fixed address but originally living in the village of Witham St Hughs near Lincoln, admitted seven charges of inciting child pornography and five charge of causing child pornography.
He also admitted sexual activity with a child, causing a child to watch a sexual act, inciting a child to engage in a sexual act and possession of an indecent photograph of a child.
Frost also pleaded guilty to 13 charges of supplying drugs including cocaine, ketamine and cannabis together with a charge of possession of cocaine with intent to supply.
Judge Michael Heath ordered Frost to remain on the sex offenders’ register for life.
Passing sentence the judge told Frost: “On any view this is a very serious case.
“You supplied drugs to seven of those girls. You had sexual intercourse with one of them and you incited or caused 11 of those girls to send you indecent images of themselves.
“You groomed or sought to groom all of them to a varying extent and used a variety of methods.”
Speaking after the sentencing Detective Superintendent Rick Hatton, of Lincolnshire Police’s Public Protection Unit said: “The sentence today reflects the seriousness of the offences in totality.
“Frost clearly coerced, groomed and pressurised young girls to send indecent images of themselves and also provided them with a supply of drugs, which he used a as a lever for his sexual offending against these young girls.
“This has had a profound effect on the victims, some as young as 12, and the manner of his offending where he has used a variety of aliases was a very worrying feature of this case.
“It highlights the dangers of interacting online with people you don’t know. We advise people to always be safe online and not to engage with or send photos to anyone you don’t know and not to end up in a position where you feel blackmailed or pressured into taking further action.
“This has been a complex case for the investigating team, which involved some painstaking analysis of evidence, but ultimately it is about the victims themselves. I hope they can begin to move on from the traumatic experiences they were subjected to at the hands of Frost.”