I just got to know that the IP Airtel assigned to me yesterday was in the range that Akismet blocks.
End result- My comments never appeared on the websites I visited yesterday as they were all marked as spam by Akismet.
Now whats my fault? I didnt do spamming anywhere, yet, the IP airtel choses to assign me randomly turns out to be the one which is banned or marked as spammer by Akismet.
Apni to kismat hi kharaab hai why blame akismet 
Ya, that’s right. Your comment on my site was marked as spam by akismet.
You are not the only one
In future you can visit http://www.whatismyip.com . It will show you your IP add.
then go to http://www.dnsstuff.com and there search for this ip if it is in any block list.
I hope this will help you
Thanks
Awww..That’s a shame, especially if you comment in more WordPress blogs. One of my friends were telling the same thing before. I reckon, you can mail your problem to Akismet, usually you might get a reply. Tell them, they are blocking a whole ISP or something like that!
Are your comments in your own blog being blocked?
Nah.. i wont mail them. I am too lazy for that. But now i know whenever i will post a comment at somebody’s blog which usually allows instant posting but still my comments dont appear, that means I am being sent in the spam folder
No my comments in my blog werent being blocked