| 4.01 | The critical accounting estimates restate the accounting policies with no specific estimation uncertainty, change or sensitivity, and the goodwill sensitivity given last year has been dropped | Compliance gap | Medium | Regulation S-K narrative: business, risk factors and MD&A | Interpretation |
| 4.02 | The full-year 2025 earnings release headlines record Adjusted EBITDA and free cash flow without the GAAP measures, the pattern the SEC staff raised in 2024 | Compliance gap | Medium | Regulation S-K narrative: business, risk factors and MD&A | Established |
| 4.04 | MD&A attributes the effective tax rate above 21% to the valuation allowance, but the rate reconciliation shows the allowance lowers the rate and research credits raise it | Presentation | Medium | Regulation S-K narrative: business, risk factors and MD&A | Established |
| 1.01 | The equity note says dividends are not restricted, but the revolving credit agreement restricts them | Compliance gap | Low | Financial statements, US GAAP and Regulation S-X | Established |
| 1.02 | Interest paid is reported net of interest received, so the cash-flow supplement does not give the interest the Company actually paid | Compliance gap | Low | Financial statements, US GAAP and Regulation S-X | Interpretation |
| 1.03 | Both years: the tax note gives no movement analysis of the [amount] valuation allowance for the three years presented, Item 15 omits Schedule II, and the unrecognized-tax-benefit reconciliation stops at two years | Compliance gap | Low | Financial statements, US GAAP and Regulation S-X | Interpretation |
| 1.04 | Interest income is netted into 'Interest expense, net' and 'Other (expense) income, net' is never analyzed, so neither interest income nor the foreign exchange result appears in the statements | Compliance gap | Low | Financial statements, US GAAP and Regulation S-X | Interpretation |
| 4.03 | Non-GAAP net income and Adjusted EBITDA remove losses on disposals of property and equipment that occur every year under a caption calling them non-recurring | Compliance gap | Low | Regulation S-K narrative: business, risk factors and MD&A | Interpretation |
| 1.05 | Accrued liabilities: the 2024 comparative was regrouped to absorb 'advanced billings' without saying so, while the revenue policy still names that caption | Presentation | Low | Financial statements, US GAAP and Regulation S-X | Established |
| 2.01 | The 2026 proxy statement, incorporated into Part III, gives two different independence determinations, one naming a director who had already resigned | Presentation | Low | Governance, controls and certifications | Established |
| 4.05 | Item 1 still describes the FCC [n] outage-notification rules as a future requirement, though Item 1A says they took effect in [date] | Presentation | Low | Regulation S-K narrative: business, risk factors and MD&A | Established |
| 1.06 | Carrier messaging surcharges that the company calls pass-through are reported gross as revenue, but the notes give no principal-versus-agent judgment | Question | Medium | Financial statements, US GAAP and Regulation S-X | Interpretation |
| 1.07 | Legal matters: the note says pending cases could materially affect results, but gives no estimate of possible loss and few particulars of the [state] [n] lawsuit | Question | Medium | Financial statements, US GAAP and Regulation S-X | Interpretation |
| 4.06 | Average annual customer revenue is reported without a definition, after the company told the staff it would discuss the measure | Question | Medium | Regulation S-K narrative: business, risk factors and MD&A | Interpretation |
| 4.07 | MD&A explains the cloud communications revenue change by three offerings' growth rates with no dollar amounts, and leaves part of the cost of revenue change unexplained | Question | Medium | Regulation S-K narrative: business, risk factors and MD&A | Interpretation |
| 4.08 | Both years: liquidity and capital resources gives a 12-month view only, with no separate long-term analysis of how the [amount] of 2028 convertible notes and the early end of the credit facility will be met | Question | Medium | Regulation S-K narrative: business, risk factors and MD&A | Interpretation |
| 1.08 | MD&A credits the higher 2025 tax benefit to the 2025 federal tax law, but the new-format rate reconciliation has no line for the effect of tax law changes | Question | Low | Financial statements, US GAAP and Regulation S-X | Interpretation |
| 1.09 | The revenue note gives neither the remaining performance obligation nor a statement that a practical expedient is used | Question | Low | Financial statements, US GAAP and Regulation S-X | Interpretation |
| 1.10 | The revenue note splits revenue only into cloud communications and surcharges, while the annual report explains revenue by three market offerings growing at very different rates | Question | Low | Financial statements, US GAAP and Regulation S-X | Interpretation |
| 1.11 | What does the single 'Accrued expense' line of [amount], [n]% of current liabilities, contain? | Question | Low | Financial statements, US GAAP and Regulation S-X | Interpretation |
| 1.12 | Share-based payment note: no tax benefit, capitalized cost or liability-award amounts are given to explain why equity credits differ from expense by [amount] over three years | Question | Low | Financial statements, US GAAP and Regulation S-X | Interpretation |
| 1.13 | Commercial paper and time deposits are placed in Level 1 of the fair value hierarchy, the level reserved for quoted prices of identical assets in active markets | Question | Low | Financial statements, US GAAP and Regulation S-X | Interpretation |
| 1.14 | The anti-dilutive restricted stock units in the loss-per-share note exceed the restricted stock units outstanding by about [n] in 2025 and [n] in 2024 | Question | Low | Financial statements, US GAAP and Regulation S-X | Interpretation |
| 2.02 | Item 1C names the Chief Information Officer as jointly responsible for cybersecurity but describes the expertise of only the Vice President, Information Security | Question | Low | Governance, controls and certifications | Interpretation |
| 2.03 | Item 9B gives no aggregate number of shares for one officer's trading plan, and a second officer's new plan overlaps the plan disclosed a year earlier | Question | Low | Governance, controls and certifications | Interpretation |
| 3.01 | Headquarters sublease to a related party: the note gives the cash received, not the income recognized or the year-end balance | Question | Low | Related parties | Interpretation |
| 4.09 | A risk factor says usage reductions 'may cause' the net retention rate to decline, while MD&A shows it fell from [n]% to [n]% in 2025 | Question | Low | Regulation S-K narrative: business, risk factors and MD&A | Interpretation |
| 4.10 | Risks that could apply to any company sit among the business-specific risks, and Item 1A has no 'General Risk Factors' caption | Question | Low | Regulation S-K narrative: business, risk factors and MD&A | Interpretation |
| 4.11 | The customer-concentration risk factor gives no measure of how concentrated revenue is | Question | Low | Regulation S-K narrative: business, risk factors and MD&A | Interpretation |
| 4.12 | Item 7A gives the foreign currency sensitivity for 2025 only: is the figure a required market risk disclosure that needs the 2024 comparative? | Question | Low | Regulation S-K narrative: business, risk factors and MD&A | Interpretation |
| 5.01 | The explanation of how the headquarters lease discount rate was set, promised to the SEC staff in 2024 and given in the 2024 10-K, is no longer in the leases note | Question | Low | Auditor's report, ICFR and the SEC filings record | Interpretation |
| 6.01 | Six wording and label slips in Items 1C, 5, 7 and 7A | Drafting | Low | Regulation S-K narrative: business, risk factors and MD&A | Established |
| 6.02 | Income taxes note: a 2023 pre-tax loss described as income, and a taxes-paid table headed as a balance date | Drafting | Low | Financial statements, US GAAP and Regulation S-X | Established |
| 6.03 | Risk factor summary spread over parts of three printed pages; Item 105(b) allows two | Drafting | Low | Regulation S-K narrative: business, risk factors and MD&A | Established |
| 6.04 | Front part, Item 1 and Item 1A: nine drafting slips (a Form 10-Q heading, a wrong contents page, typing slips and an accolade count) | Drafting | Low | Regulation S-K narrative: business, risk factors and MD&A | Established |
| 6.05 | Debt and equity notes: interim-report wording and a grammar slip | Drafting | Low | Financial statements, US GAAP and Regulation S-X | Established |
| 6.06 | Exhibit index omits the Exhibit 104 row and the word 'Inline' in the XBRL exhibit titles (both years) | Drafting | Low | Cover page, exhibits, XBRL and other disclosures | Established |
| 6.07 | Signature page: the Form's second legend for the individual signers is not printed, and the first legend reads 'the Section 13' | Drafting | Low | Cover page, exhibits, XBRL and other disclosures | Established |