The number has appeared several times in different contexts. * In “Firewall”, Reese used the number to communicate with Carter about his escape with Caroline Turing. * In “Relevance”, Finch gave the number to Shaw in case she needed help at some point. * In “Razgovor”, Finch used the number to text Shaw the address of a doctor who could treat her after she got shot while protecting a person of interest. * In “4C”, Reese used the number to communicate Finch and Shaw over VOIP (Voice over Internet Protocol) when he is on flight ZA427 (JFK to FCO).