v3.25.4
Property, Plant And Equipment
 12 Months Ended
Dec. 31, 2025
Property, Plant and Equipment [Abstract]  
Property, Plant And Equipment
NOTE 7. PROPERTY, PLANT AND EQUIPMENT

Property, plant and equipment is summarized as follows at December 31:
Lives (years)
20252024
Land-$1,370 $1,372 
Buildings and improvements
2-44
40,674 39,947 
Central office equipment1
3-10
87,496 101,607 
Cable, wiring and conduit
15-50
101,530 95,217 
Other equipment
3-20
90,853 87,656 
Software
3-7
17,942 17,663 
Under construction-7,705 7,452 
347,570 350,914 
Accumulated depreciation and amortization216,011 222,043 
Property, plant and equipment – net$131,559 $128,871 
1 Includes certain network software.

Our depreciation expense was $20,746 in 2025, $20,421 in 2024 and $18,593 in 2023. Depreciation expense included amortization of software totaling $3,209 in 2025, $3,076 in 2024 and $3,023 in 2023.
In conjunction with the decommissioning of our copper-based legacy network, we retired approximately $16,600 of fully depreciated assets that were no longer in use. These assets were primarily related to our network and central offices.