Nolan has played a key role in the Hammers' recent surge up the table and the midfielder netted his fifth goal in as many games in Saturday's 3-1 win over Southampton.
England assistant Ray Lewington was keeping a close eye on Southampton's World Cup hopefuls at Upton Park, but Nolan outshone the likes of Adam Lallana and Jay Rodriguez.
Allarcyce is delighted with Nolan's response since a costly sending-off against Fulham, but fears the 31-year-old's chance of an England place has passed him by.
"He has had a lot of times that he has knocked on the door and I don't think that's going to make much difference for him now," he said ahead of Thursday's squad announcement for the friendly with Denmark.
"It would be nice if he did, but it is just about Kevin continuing where he is now.
"He is in his thirties now so he has got to continue his career as long as he possible can by doing what he has always done and that is score goals.
"Apart from a short spell out in the Championship with Newcastle, he has scored goals every single season he has played at a very, very high level for a midfield player.
"There are very, very few players better than him at scoring goals from midfield."
Saints have not been short of goals this season, but Allardyce feels his own side has a potent attacking line-up.
"We all know how much praise has been heaped on Rickie Lambert, Jay Rodriguez and Adam Lallana about the goals they've scored and the way they've scored them," Allardyce said.
"But it's our lads up front - it's Kevin Nolan, Carlton Cole, Matt Jarvis and their quality which has outshone Southampton.
"That's the reason why we've won 3-1, because we all know how good we are at defending.
"We had a big disappointment after just a few minutes when we gave away a free-kick and lost a goal, but in the end it's an outstanding victory."