This group has featured a few times on Scammer.info earlier, but wasn’t identified yet:
+1 800 658 7602 - http://scammer.info/d/12272-fresh-printer-support-scams-3-granny
+1 800 658 7602 - http://scammer.info/d/7608-new-tech-support-numbers-from-seo-poisoning-6-13-18
+1 800 611 2648 - http://scammer.info/d/704-tech-support-scam-numbers-from-malware-bytes-posts
The phone numbers were belonging to TecMaestro (tecmaestro.com). Although most of their tech support scam websites went down around 2018, they are back in business again.
The latest website and phone number to keep an eye on:
+1 877 383 8867
customersupportsusa.com
This number was associated with the following now defunct websites:
+1 800 658 7602
antivirusnumberusa.com
antivirustechsupportusa.com
emailtechsupportusa.com
microsoftusasupport.com
printersupportusa.com
Also offline:
+1 800 624 4491
pccareglobal.com
geeksquares.com
+1 800 611 2648
nortonsupport247.com
More offline websites without a known phone number:
antivirus-supportdesk.com
printersupportusa.info
office-helpdesk.com
Online, but no phone number is listed:
tech-support.tech
Related sites:
boostbenefit.net
expertlogics.com
cybersafetechnologies.com
cybershieldtechnologies.com
renukakkar.com
sbpmedicalcollege.com (a fake college)
tecmaestro.com (the main website)
zoomworldwidesoftware.com
msnonlineservices.com
microsoftweb.us