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Directory & Resources

Business runs at the speed of light – and so should your network.

CRSTTA’s leading-edge network technology ensures your business has the connection and features you need. We’ll keep you connected, so you can focus on running your business.

Keep in contact with your loved ones on the CRST Telephone Authority communication area.


To address consumer concerns about unwelcome telemarketing calls, the Federal Communications Commission (FCC) and Federal Trade commission (FTC) have established a national Do-Not-call Registry.  The registry applies to all telemarketers (with the exception of certain non-profit and political organizations) and covers both interstate and intrastate telemarketing calls.  Commercial telemarketers are not allowed to call you if your number is listed on the registry.


You can register your phone number for free, and it will remain on the national Do-Not-Call registry for five years.  You may re-enter your number onto the list when the five years have passed, and you may remove your name from the list at any time.  The Do-Not-Call Registry will not prevent all unwanted calls.  It does not cover the following:

  • Calls from organizations with which you have established a business relationship

  • Calls for which you have given prior written consent

  • Calls which are not commercial or do not include unsolicited advertisements

  • Calls by or on behalf of tax-exempt non-profit organizations

Consumers may register their residential telephone number on the national Do-Not-Call Registry at no cost by telephone or on the Internet.  To register by telephone, consumers may call 1-888-382-1222 for TTY call 1-866-290-4236.  You must call from the phone number you wish to register.  You may also register by Internet at  Inclusion of your telephone number on the national Do-Not-Call Registry will be effective three months following your registration.  Please be aware that if you have a wireless phone, you may also register the wireless phone number on the registry.

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