About XenFax
XenFax is an independent online fax service. We let anyone send a fax from a browser — no machine, no phone line, no account required — and we publish carefully verified fax number directories for the institutions people most often need to reach.
Who runs XenFax
XenFax is operated by Rivvs LLC, based in Albany, New York — the same company named in our Terms of Service. We are a small, independent software company; XenFax is our online fax product. We are not affiliated with, endorsed by, or connected to the IRS, any bank, insurer, or government agency referenced anywhere on this site.
You can reach us any time at hello@xenfax.com — for support, to report a fax number that has changed, or to ask about porting an existing number.
What the service is
At its core, XenFax turns a PDF and a fax number into a delivered fax with a transmission confirmation. You can use it three ways:
- Pay per fax — $1.99. Send a single fax as a guest, with no account. HIPAA-compliant medical faxes are $2.99.
- XenFax Pro — $9.99/month. Unlimited outbound faxing plus your own dedicated fax number to receive faxes as PDFs.
- XenFax Medical — $29.99/month. HIPAA-compliant unlimited faxing with a Business Associate Agreement (BAA) and a dedicated number.
Every transmission is encrypted, and guest uploads are automatically deleted after 24 hours.
Why the directories exist
People still fax institutions constantly — the IRS, banks, insurers, mortgage servicers, and state benefits agencies all lean on fax for signature-based, document-heavy requests. But when we looked at the fax numbers circulating online, a lot of them were wrong: stale numbers from reorganized departments, numbers copied between aggregator sites without a source, and internal-only numbers that were never meant for public use. A payoff request or an unemployment appeal sent to the wrong number can quietly miss a deadline.
So we built directories the way we would want to find them: every number confirmed on the institution's own official source, dated, and linked — and where an institution publishes no fax number, we say so plainly instead of guessing. The Fax Number Directory ties all of these together, and our methodology page explains exactly how we verify each one.
We also publish a fully sourced fax statistics reference for anyone researching why fax is still so widely used.
Our commitment
We only publish fax numbers we could verify on an official source, we date and link every one, and we correct anything that turns out to be wrong. If you spot an out-of-date number, email hello@xenfax.com and we will re-check it against the official source.