This is the domestic applicant-location route.
Open data · checked July 30, 2026
International EIN fax routing audit
We checked 26 live guides from 26 publishers against the current IRS Form SS-4 routing rule—and published every page-level result as JSON and CSV.
Read this as a dated snapshot, not a publisher ranking.
The counts below are computed from 26 pages accessible on July 30, 2026. This convenience sample does not estimate the whole web, and a page may have changed since it was checked.
Snapshot summary
What the 26-page sample contains
A contradiction means at least one described routing scenario differs from the current IRS instructions. It is not a judgment about the rest of a page or the publisher.
Pages checked
26
26 distinct publishers
Matches
7
26.9% of this sample
Contradicts
9
34.6% of this sample
Incomplete / ambiguous
10
38.5% of this sample
Official comparison baseline
The current IRS route has two separate tests
First determine whether the applicant has a legal residence, principal place of business, or principal office or agency in a state or Washington, D.C. If not, the final number depends on where the fax originates.
This is the international-case route when the fax originates inside the United States.
This is the international-case route when the fax originates outside the United States.
The IRS says Fax-TIN numbers can change without notice. Recheck the current Form SS-4 instructions on the day you file.
Methodology
How pages were selected and classified
We searched current English-language results around international EINs, nonresident EINs, Form SS-4, and EIN fax numbers. We then opened each page and recorded only a brief paraphrase of its routing guidance.
1. Live-access required
A page had to be accessible on July 30, 2026. Inaccessible search snippets were not classified as contradictions.
2. One official baseline
Every result was compared with the IRS Instructions for Form SS-4 revised December 2025 and the current IRS filing page.
3. Conservative labels
If a page omitted a branch or used language that did not establish the IRS test, it was marked incomplete or ambiguous.
matches_current_irs_route
Every fax destination stated for the international scenario covered by the page aligns with the current IRS location and fax-origin rules.
contradicts_current_irs_route
The page assigns at least one described applicant or fax-origin scenario to a destination that differs from the current IRS route.
incomplete_or_ambiguous
The page mentions fax filing but omits an applicable branch, uses a proxy that does not establish the IRS test, or lacks enough detail for a conclusive comparison.
Page-level results
26 guides, with the routing claim paraphrased
Links open the page that was checked. Notes explain only the route-level classification; they do not assess unrelated content.
| Page checked | Stated route, paraphrased | Classification | Why |
|---|---|---|---|
| XeroChecked 2026-07-30 | Lists all three destinations and splits the international case by whether the fax is sent inside or outside the U.S. | Matches current IRS route | The three destinations and both fax-origin branches align. Compare with IRS |
| ComfaxChecked 2026-07-30 | Uses a three-row table: state/DC, international case from inside the U.S., and international case from outside. | Matches current IRS route | The location test and both fax-origin branches align. Compare with IRS |
| FaxTerraChecked 2026-07-30 | Lists 855-641-6935, 855-215-1627, and 304-707-9471 with the relevant domestic and fax-origin labels. | Matches current IRS route | All three stated routes align. Compare with IRS |
| QuickFaxChecked 2026-07-30 | Its SS-4 table distinguishes a U.S. principal office, no legal U.S. address from inside the U.S., and an outside-U.S. applicant. | Matches current IRS route | The SS-4 destinations are consistent with the baseline. Compare with IRS |
| LegalClarityChecked 2026-07-30 | States the state/DC principal-place branch plus both international fax-origin branches. | Matches current IRS route | The applicant-location and fax-origin distinctions align. Compare with IRS |
| Online LLC GuideChecked 2026-07-30 | For nonresidents, lists 855-215-1627 within the U.S. and 304-707-9471 internationally. | Matches current IRS route | Both branches align within the page's international-only scope. Compare with IRS |
| CrossVenturaChecked 2026-07-30 | For foreign companies, lists 855-215-1627 from within the U.S. and 304-707-9471 from outside. | Matches current IRS route | Both international fax-origin destinations align. Compare with IRS |
| SpeedEINChecked 2026-07-30 | Presents 855-641-6935 as the destination for international EIN applications. | Contradicts current IRS route | The IRS reserves that number for its state/DC location test. Compare with IRS |
| BusinessAnywhereChecked 2026-07-30 | Labels 855-641-6935 as the fax number for international applicants. | Contradicts current IRS route | That label differs from the current location and fax-origin rule. Compare with IRS |
| Bastion FormationsChecked 2026-07-30 | Directs nonresident applicants to 855-641-6935 and calls it the international fax line. | Contradicts current IRS route | The IRS assigns that number to the state/DC location test. Compare with IRS |
| WyomingLLC.coChecked 2026-07-30 | Tells nonresidents and foreign nationals to fax Form SS-4 to 855-641-6935. | Contradicts current IRS route | The audience-based instruction assigns the domestic destination. Compare with IRS |
| IBOCoreChecked 2026-07-30 | Directs foreign applicants to fax Form SS-4 to 855-641-6935. | Contradicts current IRS route | The IRS uses that number only when the state/DC location test is met. Compare with IRS |
| ein.soChecked 2026-07-30 | The opening uses 855-641-6935 for international applicants; later sections use 855-215-1627 without the outside-U.S. branch. | Contradicts current IRS route | The page is internally inconsistent and includes an international instruction to the domestic destination. Compare with IRS |
| terms.lawChecked 2026-07-30 | Its summary sends foreign nationals to 855-641-6935; a later list labels 304-707-9471 as international. | Contradicts current IRS route | The conflicting directions include the domestic destination for a foreign-applicant scenario. Compare with IRS |
| FaxendChecked 2026-07-30 | Assigns 855-215-1627 to applicants filing from outside the United States. | Contradicts current IRS route | The current outside-U.S. fax-origin destination is 304-707-9471. Compare with IRS |
| EINNumber.coChecked 2026-07-30 | Assigns 855-215-1627 by lack of a U.S. business address and repeats it for applicants in named foreign countries. | Contradicts current IRS route | The IRS makes the final international split by fax origin and includes a separate outside-U.S. branch. Compare with IRS |
| Northwest Registered AgentChecked 2026-07-30 | Lists 855-641-6935 for U.S. applicants and 304-707-9471 for international applicants. | Incomplete or ambiguous | The 855-215-1627 within-U.S. international branch is not stated. Compare with IRS |
| MyFreeTaxAmericaChecked 2026-07-30 | Lists all three numbers, but chooses between them using a U.S. address and whether an online fax service is U.S.-based. | Incomplete or ambiguous | Those proxies do not necessarily establish the IRS location test or the fax's actual origin. Compare with IRS |
| FilingExpressChecked 2026-07-30 | Lists 855-641-6935 as domestic and 304-707-9471 as international. | Incomplete or ambiguous | The 855-215-1627 within-U.S. international branch is omitted. Compare with IRS |
| ForeignFounderChecked 2026-07-30 | Points nonresidents to the current IRS instructions for the applicable number without reproducing it. | Incomplete or ambiguous | The referral is prudent, but the page itself lacks enough route detail for a match. Compare with IRS |
| Vantis CPAChecked 2026-07-30 | Explains that foreign applicants may file Form SS-4 by fax but does not state a destination. | Incomplete or ambiguous | No route is stated, so a destination-level comparison is not possible. Compare with IRS |
| Optimize TaxChecked 2026-07-30 | Describes fax as an international EIN application method but does not publish the routing numbers. | Incomplete or ambiguous | The page points to official guidance but lacks enough detail for a route-level match. Compare with IRS |
| Mizu FinancialChecked 2026-07-30 | Tells non-U.S. founders to fax Form SS-4 to the international EIN unit without stating a number. | Incomplete or ambiguous | The fax-origin branch and destination are not available on the page. Compare with IRS |
| BeginPulseChecked 2026-07-30 | Says nonresidents should fax Form SS-4 to the international fax line but does not state a number. | Incomplete or ambiguous | Neither international fax-origin branch is specified. Compare with IRS |
| LLC For ForeignersChecked 2026-07-30 | Displays 304-707-9471 as the fax number for its nonresident audience. | Incomplete or ambiguous | The number fits an outside-U.S. origin, but that condition and the within-U.S. branch are not stated. Compare with IRS |
| ein.nowChecked 2026-07-30 | Lists 304-707-9471 as international and 855-641-6935 as U.S.-based. | Incomplete or ambiguous | The 855-215-1627 within-U.S. international route is not included. Compare with IRS |
What this snapshot shows
The origin split is the detail most easily lost
In this sample, the most common gap is not the existence of an international filing path. It is the distinction between an international case faxed from within the United States and one faxed from outside it.
- Seven pages state routes that align for the international scenario they cover.
- Nine pages assign at least one described scenario to a destination that differs from the current IRS route.
- Ten pages omit a branch or do not state enough detail for a conclusive route-level comparison.
- The correct number cannot be chosen from owner nationality alone.
Primary citations
Verify the rule at IRS.gov
The audit uses first-party IRS sources as its comparison baseline. Third-party pages are the objects being reviewed, not sources for the official rule.
IRS Instructions for Form SS-4 (12/2025)
See “Apply by fax” for the applicant-location and fax-origin tests.
IRS: Where to file your taxes for Form SS-4
Current address and fax table for domestic and international operations.
IRS: Employer identification number
Current EIN application overview and links to official filing routes.
Version history
Changelog
Corrections and future re-checks will be dated here. A later snapshot should not silently overwrite what was observed on this date.
Initial snapshot: 26 live-accessible pages checked against current IRS routing.