Blocked for students due to "abuse" Website says ip address has access resource too many times

Validator,
We are a school district that students uses your site every day to check their HTML code. We are getting a block page due to abuse. We use NAT addresses  (66.90.190.250 - 66.90.190.251) to access the web. Is there a way to unblock us by IP address so we don't get that error message.

Thank you
Michael Bohler

NOTE: Whenever possible, give the address of the document you were checking..

Received on Monday, 29 February 2016 22:50:47 UTC