Carragher revealed he spoke with Coady - who he guided as a youngster at Liverpool - before the defender made his first England appearance against Denmark on Tuesday.
"I will be honest with you it is fantastic, he has been brilliant with me since I was young boy at Liverpool coming through," Coady replied when asked about Carragher's support, via the Express & Star.
"He has been absolutely fantastic and ever since I left Liverpool he has dropped me the odd text, we've done a little bit on Sky Sports as well.
"He is a massive influence for me, he really is, because he is someone I looked up to as a kid to see how he defended and I learnt a lot off him.
"I watched a lot of him as a centre-half, how he organised, how he did things and whenever he says good things about me, it is an incredible feeling because what a player he was and he was someone I looked up to massively as a kid so it is fantastic."