Common use of Diagnostic PIDs Clause in Contracts

Diagnostic PIDs. GA-1 Gateway Availability – LSR (includes former GA-8) • GA-3 Gateway Availability – Repair (includes former GA-6) • GA-4 Gateway Availability – ASR • GA-7 Timely Outage Resolution – Software • PO-1 Pre-Order / Order Response Times • PO-2 Electronic Flow Through • PO-3 LSR Rejection Notice Interval • PO-9 Timely Jeopardy Notices • OP-15 Interval for Orders Delayed Past Due Date • MR-11 LNP Trouble Reports Cleared • MR-9 Repair Appointments Met • BI-2 Invoices Delivered within 10 days • BI-3 Billing Accuracy – Adjustments for Errors • BI-4 Billing Completeness • DB-1b Time to Update Databases – LIDB • DB-1c Time to Update Databases – Listings • NI-1 Trunk Blocking • CP-2 Collocations Completed

Diagnostic PIDs. GA-1 Gateway Availability – LSR (includes former GA-8) • GA-3 Gateway Availability – Repair (includes former GA-6) • GA-4 Gateway Availability – ASR • GA-7 Timely Outage Resolution – Software • PO-1 Pre-Order / Order Response Times • PO-2 Electronic Flow Through • PO-3 LSR Rejection Notice Interval • PO-9 Timely Jeopardy Notices • OP-15 Interval for Orders Delayed Past Due Date • MR-11 LNP Trouble Reports Cleared • MR-9 Repair Appointments Met NOTE 1 • BI-2 Invoices Delivered within 10 days • BI-3 Billing Accuracy – Adjustments for Errors • BI-4 Billing Completeness • DB-1b Time to Update Databases – LIDB • DB-1c Time to Update Databases – Listings • NI-1 Trunk Blocking • CP-2 Collocations CompletedCompleted NOTE 1: For product reference see ‘Definition of Terms’ in ‘CTL Amended ICA Exhibit B PID’. Reporting and payment eligible period for these products begin 2/2/20 and end 8/2/22 for specific metric categories in Exhibit B PID Version 10.1.

Diagnostic PIDs.  GA-1 Gateway Availability – LSR (includes former GA-8) •  GA-3 Gateway Availability – Repair (includes former GA-6) •  GA-4 Gateway Availability – ASR •  GA-7 Timely Outage Resolution – Software •  PO-1 Pre-Order / Order Response Times •  PO-2 Electronic Flow Through •  PO-3 LSR Rejection Notice Interval •  PO-9 Timely Jeopardy Notices •  OP-15 Interval for Orders Delayed Past Due Date •  MR-11 LNP Trouble Reports Cleared •  MR-9 Repair Appointments Met •  BI-2 Invoices Delivered within 10 days •  BI-3 Billing Accuracy – Adjustments for Errors •  BI-4 Billing Completeness •  DB-1b Time to Update Databases – LIDB •  DB-1c Time to Update Databases – Listings •  NI-1 Trunk Blocking •  CP-2 Collocations Completed

Diagnostic PIDs. GA-1 Gateway Availability – LSR (includes former GA-8) • GA-3 Gateway Availability – Repair (includes former GA-6) • GA-4 Gateway Availability – ASR • GA-7 Timely Outage Resolution – Software • PO-1 Pre-Order / Order Response Times • PO-2 Electronic Flow Through • PO-3 LSR Rejection Notice Interval • PO-9 Timely Jeopardy Notices • OP-15 Interval for Orders Delayed Past Due Date • MR-11 LNP Trouble Reports Cleared • MR-9 Repair Appointments Met • NOTE 1 BI-2 Invoices Delivered within 10 days • BI-3 Billing Accuracy – Adjustments for Errors • BI-4 Billing Completeness • DB-1b Time to Update Databases – LIDB • DB-1c Time to Update Databases – Listings • NI-1 Trunk Blocking • CP-2 Collocations Completed

Diagnostic PIDs. GA-1 Gateway Availability – LSR (includes former GA-8) • GA-3 Gateway Availability – Repair (includes former GA-6) • GA-4 Gateway Availability – ASR • GA-7 Timely Outage Resolution – Software • PO-1 Pre-Order / Order Response Times • PO-2 Electronic Flow Through • PO-3 LSR Rejection Notice Interval • PO-9 Timely Jeopardy Notices • OP-15 Interval for Orders Delayed Past Due Date • MR-11 LNP Trouble Reports Cleared • MR-9 Repair Appointments Met • BI-2 Invoices Delivered within 10 days • BI-3 Billing Accuracy – Adjustments for Errors • BI-4 Billing Completeness • DB-1b Time to Update Databases – LIDB • DB-1c Time to Update Databases – Listings • NI-1 Trunk Blocking DocuSign Envelope ID: 4647CA25-E106-49CD-BD1B-8FFCA893A3C8 • CP-2 Collocations CompletedCompleted DocuSign Envelope ID: 4647CA25-E106-49CD-BD1B-8FFCA893A3C8

Diagnostic PIDs. GA-1 Gateway Availability – LSR (includes former GA-8) • GA-3 Gateway Availability – Repair (includes former GA-6) • GA-4 Gateway Availability – ASR • GA-7 Timely Outage Resolution – Software • PO-1 Pre-Order / Order Response Times • PO-2 Electronic Flow Through • PO-3 LSR Rejection Notice Interval • PO-9 Timely Jeopardy Notices • OP-15 Interval for Orders Delayed Past Due Date • MR-11 LNP Trouble Reports Cleared • MR-9 Repair Appointments Met • BI-2 Invoices Delivered within 10 days • BI-3 Billing Accuracy – Adjustments for Errors • BI-4 Billing Completeness • DB-1b Time to Update Databases – LIDB • DB-1c Time to Update Databases – Listings • NI-1 Trunk Blocking • CP-2 Collocations Completed