How to use LIKE on inet field in Postgres
Use subnet operators for such queries. '88.99.0.0/16'
should do it :
SELECT * FROM users WHERE ip << inet '88.99.0.0/16';
Another option which worked for me if you want to do a string comparison is this:
SELECT * FROM users WHERE TEXT(ip) LIKE '88.99.%';
although it will be less efficient than "How to use LIKE on inet field in Postgres".
Reference: https://www.postgresql.org/docs/8.2/static/functions-net.html