| 2025 | 12 | 10,017 | $0 | $0 | - |
| Frontier Communications Corporate Services Choices Plan | - | 167 | - | - | - |
| Frontier Communications Corporate Services Income Security Plan for MID-Atlantic Associates | - | 1,273 | - | - | - |
| Frontier Communications Corporate Services Plan 550 | - | 1,273 | - | - | - |
| Frontier Communications Corporate Services Plan 551 | - | 1,273 | - | - | - |
| Frontier Communications Corporate Services Plan 552 | - | 170 | - | - | - |
| Frontier Communications Corporate Services Plan for Group Insurance | - | 1,370 | - | - | - |
| Frontier Communications Corporate Services Sickness and Accident Disability Benefit Plan for MID-Atlantic Associates | - | 1,273 | - | - | - |
| Frontier Communications Corporation Basic Group Life Insurance | - | 9,988 | - | - | - |
| Frontier Communications Corporation Health Care Plan | - | 8,871 | - | - | - |
| Frontier Communications Corporation Long Term Salary Continuance | - | 6,318 | - | - | - |
| Frontier Communications Corporation Travel Accident Insurance Plan | - | 10,017 | - | - | - |
| Frontier Communications Corporation Vision Service Care Plan | - | 8,380 | - | - | - |
| 2024 | 21 | 12,015 | $8,674,136,951 | $302,610,699 | $25,186iApproximate average salary by contribution assumption: employee only about $629,652 at 4% or $419,768 at 6%; with 50% employer match about $419,768 at 4% or $279,845 at 6%; with 100% employer match about $314,826 at 4% or $209,884 at 6%. |
| Frontier Communications Parent Inc. Master Trust | - | - | $3,090,190,712 | - | - |
| Frontier Communications 401(K) Savings Plan | - | 12,015 | $2,926,784,012 | $165,531,815 | $13,777iApproximate average salary by contribution assumption: employee only about $344,427 at 4% or $229,618 at 6%; with 50% employer match about $229,618 at 4% or $153,079 at 6%; with 100% employer match about $172,214 at 4% or $114,809 at 6%. |
| Frontier Communications Pension Plan | - | 8,205 | $2,413,562,974 | $123,302,018 | $15,028iApproximate average salary by contribution assumption: employee only about $375,692 at 4% or $250,461 at 6%; with 50% employer match about $250,461 at 4% or $166,974 at 6%; with 100% employer match about $187,846 at 4% or $125,231 at 6%. |
| Frontier Communications Corporate Services Inc. Savings and Security Plan for MID-Atlantic Associates | - | 1,369 | $243,599,253 | $13,776,866 | $10,063iApproximate average salary by contribution assumption: employee only about $251,586 at 4% or $167,724 at 6%; with 50% employer match about $167,724 at 4% or $111,816 at 6%; with 100% employer match about $125,793 at 4% or $83,862 at 6%. |
| Frontier Communications Corporate Services Choices Plan | - | 173 | - | - | - |
| Frontier Communications Corporate Services Income Security Plan for MID-Atlantic Associates | - | 1,205 | - | - | - |
| Frontier Communications Corporate Services Plan 550 | - | 1,205 | - | - | - |
| Frontier Communications Corporate Services Plan 551 | - | 1,205 | - | - | - |
| Frontier Communications Corporate Services Plan 552 | - | 149 | - | - | - |
| Frontier Communications Corporate Services Plan for Group Insurance | - | 1,380 | - | - | - |
| Frontier Communications Corporate Services Sickness and Accident Disability Benefit Plan for MID-Atlantic Associates | - | 1,205 | - | - | - |
| Frontier Communications Corporation Basic Group Life Insurance | - | 10,312 | - | - | - |
| Frontier Communications Corporation Health Care Plan | - | 9,182 | - | - | - |
| Frontier Communications Corporation Long Term Salary Continuance | - | 6,530 | - | - | - |
| Frontier Communications Corporation Travel Accident Insurance Plan | - | 10,145 | - | - | - |
| Frontier Communications Corporation Vision Service Care Plan | - | 8,706 | - | - | - |
| Frontier Communications Corporation Retiree Welfare Plan 603 | - | 0 | - | - | - |
| Frontier Communications Corporation Retiree Medical Plan | - | 0 | - | - | - |
| Frontier Communications Corporation Ctf Short Term Disability Plan | - | 3,634 | - | - | - |
| Frontier Communications Corporate Services Inc. Retiree Plan for Group Insurance | - | 0 | - | - | - |
| Frontier Communications Corporate Services Plan 554 | - | 0 | - | - | - |
| 2023 | 21 | 12,125 | $8,085,436,242 | $284,367,218 | $23,453iApproximate average salary by contribution assumption: employee only about $586,324 at 4% or $390,883 at 6%; with 50% employer match about $390,883 at 4% or $260,589 at 6%; with 100% employer match about $293,162 at 4% or $195,441 at 6%. |
| Frontier Communications Parent Inc. Master Trust | - | - | $2,818,954,090 | - | - |
| Frontier Communications 401(K) Savings Plan | - | 12,125 | $2,687,918,276 | $129,470,469 | $10,678iApproximate average salary by contribution assumption: employee only about $266,949 at 4% or $177,966 at 6%; with 50% employer match about $177,966 at 4% or $118,644 at 6%; with 100% employer match about $133,475 at 4% or $88,983 at 6%. |
| Frontier Communications Pension Plan | - | 8,761 | $2,362,977,641 | $141,596,239 | $16,162iApproximate average salary by contribution assumption: employee only about $404,053 at 4% or $269,368 at 6%; with 50% employer match about $269,368 at 4% or $179,579 at 6%; with 100% employer match about $202,026 at 4% or $134,684 at 6%. |
| Frontier Communications Corporate Services Inc. Savings and Security Plan for MID-Atlantic Associates | - | 1,291 | $215,586,235 | $13,300,510 | $10,302iApproximate average salary by contribution assumption: employee only about $257,562 at 4% or $171,708 at 6%; with 50% employer match about $171,708 at 4% or $114,472 at 6%; with 100% employer match about $128,781 at 4% or $85,854 at 6%. |
| Frontier Communications Corporate Services Plan 554 | - | 0 | - | - | - |
| Frontier Communications Corporate Services Inc. Retiree Plan for Group Insurance | - | 0 | - | - | - |
| Frontier Communications Corporation Ctf Short Term Disability Plan | - | 4,022 | - | - | - |
| Frontier Communications Corporation Retiree Medical Plan | - | 0 | - | - | - |
| Frontier Communications Corporation Retiree Welfare Plan 603 | - | 0 | - | - | - |
| Frontier Communications Corporate Services Choices Plan | - | 188 | - | - | - |
| Frontier Communications Corporate Services Income Security Plan for MID-Atlantic Associates | - | 1,274 | - | - | - |
| Frontier Communications Corporate Services Plan 550 | - | 1,274 | - | - | - |
| Frontier Communications Corporate Services Plan 551 | - | 1,274 | - | - | - |
| Frontier Communications Corporate Services Plan 552 | - | 158 | - | - | - |
| Frontier Communications Corporate Services Plan for Group Insurance | - | 1,417 | - | - | - |
| Frontier Communications Corporate Services Sickness and Accident Disability Benefit Plan for MID-Atlantic Associates | - | 1,274 | - | - | - |
| Frontier Communications Corporation Basic Group Life Insurance | - | 10,515 | - | - | - |
| Frontier Communications Corporation Health Care Plan | - | 9,384 | - | - | - |
| Frontier Communications Corporation Long Term Salary Continuance | - | 6,484 | - | - | - |
| Frontier Communications Corporation Travel Accident Insurance Plan | - | 10,787 | - | - | - |
| Frontier Communications Corporation Vision Service Care Plan | - | 8,944 | - | - | - |
| 2022 | 21 | 13,445 | $7,336,339,590 | $288,091,359 | $21,427iApproximate average salary by contribution assumption: employee only about $535,685 at 4% or $357,123 at 6%; with 50% employer match about $357,123 at 4% or $238,082 at 6%; with 100% employer match about $267,842 at 4% or $178,562 at 6%. |
| Frontier Communications Parent Inc. Master Trust | - | - | $2,563,741,813 | - | - |
| Frontier Communications 401(K) Savings Plan | - | 13,445 | $2,464,570,539 | $135,434,367 | $10,073iApproximate average salary by contribution assumption: employee only about $251,830 at 4% or $167,887 at 6%; with 50% employer match about $167,887 at 4% or $111,925 at 6%; with 100% employer match about $125,915 at 4% or $83,943 at 6%. |
| Frontier Communications Pension Plan | - | 9,659 | $2,123,141,183 | $139,366,907 | $14,429iApproximate average salary by contribution assumption: employee only about $360,718 at 4% or $240,478 at 6%; with 50% employer match about $240,478 at 4% or $160,319 at 6%; with 100% employer match about $180,359 at 4% or $120,239 at 6%. |
| Frontier Communications Corporate Services Inc. Savings and Security Plan for MID-Atlantic Associates | - | 1,343 | $184,886,055 | $13,290,085 | $9,896iApproximate average salary by contribution assumption: employee only about $247,395 at 4% or $164,930 at 6%; with 50% employer match about $164,930 at 4% or $109,954 at 6%; with 100% employer match about $123,698 at 4% or $82,465 at 6%. |
| Frontier Communications Corporation Retiree Medical Plan | - | 0 | - | - | - |
| Frontier Communications Corporate Services Plan 554 | - | 0 | - | - | - |
| Frontier Communications Corporate Services Inc. Retiree Plan for Group Insurance | - | 0 | - | - | - |
| Frontier Communications Corporation Retiree Welfare Plan 603 | - | 0 | - | - | - |
| Frontier Communications Corporation Ctf Short Term Disability Plan | - | 4,415 | - | - | - |
| Frontier Communications Corporate Services Choices Plan | - | 222 | - | - | - |
| Frontier Communications Corporate Services Income Security Plan for MID-Atlantic Associates | - | 1,239 | - | - | - |
| Frontier Communications Corporate Services Plan 550 | - | 1,239 | - | - | - |
| Frontier Communications Corporate Services Plan 551 | - | 1,239 | - | - | - |
| Frontier Communications Corporate Services Plan 552 | - | 174 | - | - | - |
| Frontier Communications Corporate Services Plan for Group Insurance | - | 1,573 | - | - | - |
| Frontier Communications Corporate Services Sickness and Accident Disability Benefit Plan for MID-Atlantic Associates | - | 1,239 | - | - | - |
| Frontier Communications Corporation Basic Group Life Insurance | - | 11,794 | - | - | - |
| Frontier Communications Corporation Health Care Plan | - | 9,047 | - | - | - |
| Frontier Communications Corporation Long Term Salary Continuance | - | 7,314 | - | - | - |
| Frontier Communications Corporation Travel Accident Insurance Plan | - | 11,943 | - | - | - |
| Frontier Communications Corporation Vision Service Care Plan | - | 8,616 | - | - | - |
| 2021 | 21 | 14,478 | $9,334,610,019 | $276,527,183 | $19,100iApproximate average salary by contribution assumption: employee only about $477,495 at 4% or $318,330 at 6%; with 50% employer match about $318,330 at 4% or $212,220 at 6%; with 100% employer match about $238,748 at 4% or $159,165 at 6%. |
| Frontier Communications Parent Inc. Master Trust | - | - | $3,219,151,622 | - | - |
| Frontier Communications 401(K) Savings Plan | - | 14,478 | $3,085,512,334 | $136,259,758 | $9,412iApproximate average salary by contribution assumption: employee only about $235,288 at 4% or $156,858 at 6%; with 50% employer match about $156,858 at 4% or $104,572 at 6%; with 100% employer match about $117,644 at 4% or $78,429 at 6%. |
| Frontier Communications Pension Plan | - | 10,653 | $2,808,881,101 | $128,317,120 | $12,045iApproximate average salary by contribution assumption: employee only about $301,129 at 4% or $200,753 at 6%; with 50% employer match about $200,753 at 4% or $133,835 at 6%; with 100% employer match about $150,565 at 4% or $100,376 at 6%. |
| Frontier Communications Corporate Services Inc. Savings and Security Plan for MID-Atlantic Associates | - | 1,313 | $221,064,962 | $11,950,305 | $9,102iApproximate average salary by contribution assumption: employee only about $227,538 at 4% or $151,692 at 6%; with 50% employer match about $151,692 at 4% or $101,128 at 6%; with 100% employer match about $113,769 at 4% or $75,846 at 6%. |
| Frontier Communications Corporate Services Choices Plan | - | 251 | - | - | - |
| Frontier Communications Corporate Services Income Security Plan for MID-Atlantic Associates | - | 1,216 | - | - | - |
| Frontier Communications Corporate Services Plan 550 | - | 1,216 | - | - | - |
| Frontier Communications Corporate Services Plan 551 | - | 1,216 | - | - | - |
| Frontier Communications Corporate Services Plan 552 | - | 184 | - | - | - |
| Frontier Communications Corporate Services Plan for Group Insurance | - | 1,761 | - | - | - |
| Frontier Communications Corporate Services Sickness and Accident Disability Benefit Plan for MID-Atlantic Associates | - | 1,216 | - | - | - |
| Frontier Communications Corporation Basic Group Life Insurance | - | 12,563 | - | - | - |
| Frontier Communications Corporation Health Care Plan | - | 11,273 | - | - | - |
| Frontier Communications Corporation Long Term Salary Continuance | - | 7,846 | - | - | - |
| Frontier Communications Corporation Travel Accident Insurance Plan | - | 12,862 | - | - | - |
| Frontier Communications Corporation Vision Service Care Plan | - | 10,614 | - | - | - |
| Frontier Communications Corporate Services Plan 554 | - | 0 | - | - | - |
| Frontier Communications Corporate Services Inc. Retiree Plan for Group Insurance | - | 0 | - | - | - |
| Frontier Communications Corporation Retiree Medical Plan | - | 0 | - | - | - |
| Frontier Communications Corporation Retiree Welfare Plan 603 | - | 0 | - | - | - |
| Frontier Communications Corporation Ctf Short Term Disability Plan | - | 4,716 | - | - | - |
| 2020 | 1 | 4,933 | $0 | $0 | - |
| Frontier Communications Corporation Ctf Short Term Disability Plan | - | 4,933 | - | - | - |
| 2019 | 1 | 6,030 | $0 | $0 | - |
| Frontier Communications Corporation Ctf Short Term Disability Plan | - | 6,030 | - | - | - |