What are the main domain names used by large free email providers and ISPs?
Summary
What email marketers say11Marketer opinions
Email marketer from Tech Forum notes that many ISPs use their own domain names for email services, such as comcast.net (Comcast), verizon.net (Verizon), and att.net (AT&T).
Email marketer from Email Hippo states that there are many email domains and to see them all, you would need an email validation service.
Email marketer from Github provides a comprehensive list of domain names used by various email providers, including Google (gmail.com, googlemail.com), Microsoft (hotmail.com, live.com, outlook.com), Yahoo (yahoo.com, ymail.com), and others.
Marketer from Email Geeks shares a code snippet to identify consumer email domains from Google, Microsoft, Oath, United Online, Cox, Earthlink, Comcast, Apple, Chinese providers, AT&T, CenturyLink, Zoho and Charter.
Marketer from Email Geeks refers to Al Iverson's helpful list regarding Microsoft, AOL, and Gmail domains: <https://www.spamresource.com/2021/09/reference-magy-microsoft-aol-gmail.html>
Email marketer from Kickbox states that there are so many domains and more constantly being created and suggests they maintain a list of temporary domains to help their customers in their documentation.
Email marketer from Email Geeks Forum mentions that in addition to major providers, some popular international domains include qq.com (China), mail.ru (Russia), and gmx.net (Germany).
Email marketer from Spam Resource shares that Microsoft uses hotmail.com, live.com and outlook.com; AOL uses aol.com, and Verizon.net and Yahoo uses yahoo.com
Marketer from Email Geeks states that Spectrum is the brand name for Charter, similar to how Xfinity is the brand name for Comcast.
Email marketer from Reddit points out that AOL still uses aol.com, and Yahoo uses yahoo.com and ymail.com, though their popularity has decreased over time.
Email marketer from Reddit explains that popular domains include gmail.com, yahoo.com, outlook.com, and for ISPs, comcast.net and verizon.net are common.
What the experts say5Expert opinions
Expert from Email Geeks references Spectrum webmail, stating that it's for former Time Warner Cable and BrightHouse customers, allowing access to roadrunner.com, rr.com, twc.com and brighthouse.com email.
Expert from Email Geeks confirms that many rr.com domains are still active and answering.
Expert from Word to the Wise recommends to be very careful in scraping or parsing domains from email providers because their usage can change without notice and cause problems for systems relying on those results.
Expert from Spam Resource details the difference between Comcast's domains, clarifying that comcast.net is for customer emails, while comcast.com is primarily for corporate use.
Expert from Email Geeks provides a link to a series of domain guides, tagged as ispdomains: <https://www.spamresource.com/search/label/ispdomains>
What the documentation says5Technical articles
Documentation from Google Workspace Admin Help explains that Gmail uses domains such as gmail.com and googlemail.com.
Documentation from Microsoft Support shares that Microsoft uses outlook.com, hotmail.com, live.com, and msn.com as their main free email domains.
Documentation from Apple Support details that Apple primarily uses icloud.com, me.com, and mac.com for its email services.
Documentation from Comcast Help confirms that comcast.net is the primary email domain used for Comcast subscribers.
Documentation from Verizon Help indicates that verizon.net is the domain associated with Verizon's email services.