It is required by ARIN policy to list your contact information within their WHOIS database if you have an IP block of /29 or larger.
The information we submit is gathered from your Profile in the Portal.
If you would like to change what appears in ARIN's WHOIS database, click Edit Profile from your Portal dashboard and make the required changes. Then send us an email at support@arpnetworks.com or open a support issue and let us know you wish this information to be re-submitted to ARIN (via SWIP).