The most common Irsn email format is {first}.{last}@irsn.fr (e.g. jane.doe@irsn.fr), used in about 97% of observed Irsn work emails. Irsn uses 2 address formats in total.
Most likely format — based on 669 observed addresses
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Irsn email formats
97.0% of observed Irsn addresses use the {first}.{last}@ format.
Email formatExampleShare
{first}.{last}@irsn.fr
Examplejane.doe@irsn.fr
Share97.0%
{last}.{first}@irsn.fr
Exampledoe.jane@irsn.fr
Share3.0%
Derived from 669 real observed addresses · data refreshed 2026-05-30. Role-based inboxes (info@, sales@, …) are excluded from format detection.
Verify the pattern before you send
Start with the format that appears most often. For Irsn, that means testing {first}.{last}@irsn.fr first, then verifying the exact address before it reaches your CRM or sequencer. A pattern can be common and still produce bad guesses when a person uses a nickname, a middle initial, a regional mailbox, or an older alias.
VeriMails checks syntax, MX records, SMTP behavior, disposable domains, and catch-all detection so you can keep valid addresses and skip risky ones. For larger files, credits start at $19 for 10,000 verifications and never expire. Create a free account, test the pattern on a few addresses, then buy more credits only when you need volume. Run the check again before a large campaign if the list is old, because domains change mail routing and people leave.
The most common Irsn email format is {first}.{last}@irsn.fr (for example jane.doe@irsn.fr), used in about 97% of observed Irsn work addresses. Irsn also uses 1 other format for name collisions.
How accurate is this Irsn email format?
This format is derived from 669 real Irsn addresses observed across our data, not guessed. To confirm a specific address, use the live verifier above — it checks deliverability in real time.
How do I find and verify a specific person's Irsn email?
Apply the most common pattern to the person's name (e.g. jane.doe@irsn.fr), then verify it on this page — or use the Find tab to get the likely address from their name automatically.
What other email formats does Irsn use?
Beyond {first}.{last}@irsn.fr, observed formats include {last}.{first}@irsn.fr, in descending order of frequency.
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