the domain name is not delegated to zoneedit:
Whois sigmaco.com
Domain Name: SIGMACO.COM
Registry Domain ID: 1196773_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.networksolutions.com
Registrar URL:
http://networksolutions.com
Updated Date: 2018-06-21T14:46:40Z
Creation Date: 1998-04-29T04:00:00Z
Registry Expiry Date: 2024-04-28T04:00:00Z
Registrar: Network Solutions, LLC
Registrar IANA ID: 2
Registrar Abuse Contact Email:
abuse@web.com
Registrar Abuse Contact Phone: +1.8003337680
Domain Status: clientTransferProhibited
https://icann.org/epp#clientTransferProhibited
Name Server: NS1.SIGMACO.COM
Name Server: NS2.SIGMACO.COM
the vanity nameservers appear to point to comcast and Qwest
the only zoneedit service the domain is using is back up MX:
host -t mx sigmaco.com
sigmaco.com mail is handled by 500 sigmaco-com.mail.protection.outlook.com.
sigmaco.com mail is handled by 505 mx-caprica.zoneedit.com.
regards.