Pivot map
Use this map to decide whether Email format accepts the lead you are holding, and what kind of lead it may return for the next step.
Pivot from here
Outputs from Email format can become inputs for the next tool. These are the most relevant follow-on pivots in the library.
Lookup email addresses and mailing addresses with reverse email search to identify people and organizations in OSINT investigations.
Addresses.com provides US residential address lookups, reverse phone searches, and people finder tools for locating individuals.
Ancestry search provides access to billions of historical records including census data, vital records, immigration documents, and family trees.
Canada411 is Canada's people directory for finding individuals by name, providing addresses and phone numbers for OSINT investigations.
AccountKiller provides direct deletion links and step-by-step instructions for removing accounts on hundreds of websites and social platforms.
Lookup email addresses and mailing addresses with reverse email search to identify people and organizations in OSINT investigations.
Addresses.com provides US residential address lookups, reverse phone searches, and people finder tools for locating individuals.
Algo VPN automates deployment of a personal WireGuard or IKEv2 VPN server in the cloud for private, secure OPSEC browsing.
Investigator Use
Email Format (email-format.com) is a reference database that documents the email address naming conventions used by thousands of organizations worldwide. By searching for a company or domain, investigators can identify the specific email format that organization uses — whether first.last@, flast@, firstname@, or other patterns — enabling systematic generation of valid email addresses for any individual known to work there.
For OSINT investigators conducting corporate investigations, knowing a target organization's email format is a fundamental capability. Once the pattern is established, any person known to work at the organization (from LinkedIn, conference speaker lists, press releases, or other OSINT sources) can have their likely email address generated and then validated through email verification tools.
The database is built from community contributions and verified email addresses, meaning the patterns it documents are derived from real, confirmed organizational addresses rather than speculation. Pattern confidence is typically high for major corporations and well-documented organizations.
Corporate email enumeration workflow: identify target organization's domain via OSINT, look up the email format pattern on Email Format, cross-reference with a staff list derived from LinkedIn or other sources, generate candidate email addresses for each identified individual, validate through Email Checker or Email Hippo, and feed confirmed addresses into breach databases and social media searches.
For penetration testing engagements, confirmed corporate email addresses are used in spear-phishing simulations, where realistic targeting requires accurate email address knowledge. For OSINT investigations, they provide verified pivot points for searches across platforms that use email addresses as account identifiers.
Email Format also allows reverse lookups — entering a known email address can confirm or reveal whether it fits the documented organizational pattern, which helps assess whether a claimed email address is consistent with that person's alleged employer.
Limitations: The database may not have entries for smaller organizations or recent company email format changes. Always verify the pattern against at least one known-valid address before using it for systematic enumeration.
Record the organization, identified email format, and source confirmation in case documentation.
Before You Pivot
Capture the target, search terms, and why this source is relevant before you leave the page.
Archive volatile pages, save screenshots, and keep timestamps for anything that may change.
Treat one tool as a lead source. Confirm important findings with independent sources.
Related tools
Email Checker is a free email verification tool. It helps you validate any email address online for free. Check if mailbox really exists.
Online Email Extrator, seperate your emails from the rest of your document easily with simple cut and paste. Then organize your emails here
First 50 searches are FREE. Quickly find anyone's contact information for your lead research, talent acquisition, PR, or HR with our email finder!
E-Mail IP Leak Test is a free tool for the internet allowing end users to test their e-mail provider
Check if an email is valid with our free online email verifier. Send your emails with complete confidence. Never get bounces anymore.
Email Hippo verifies email address deliverability and syntax, detects disposable addresses, and identifies catch-all mail server configurations.