Concentration of Credit Risk (Tables)

9 Months Ended

Oct. 26, 2019

Schedule that Represents A Significant Portion of the Company’s Customer Base and Each Over 10% of Total Revenue

Customers whose combined amounts of accounts receivable and contract assets, net, exceeded 10% of total combined accounts receivable and contract assets, net, as of October 26, 2019 or January 26, 2019 were as follows (dollars in millions):



	October 26, 2019			January 26, 2019
	Amount		% of Total	Amount		% of Total
Verizon Communications Inc.	$	511.3	41.1%	$	298.4	36.2%
CenturyLink, Inc.	$	200.9	16.1%	$	147.2	17.9%
Comcast Corporation	$	160.2	12.9%	$	127.2	15.4%
AT&T Inc.	$	111.3	8.9%	$	90.6	11.0%

Total contract revenues by customer type during the three and nine months ended October 26, 2019 and October 27, 2018 were as follows (dollars in millions):



	For the Three Months Ended						For the Nine Months Ended
	October 26, 2019			October 27, 2018			October 26, 2019			October 27, 2018
	Amount		% of Total	Amount		% of Total	Amount		% of Total	Amount		% of Total
Telecommunications	$	798.1	90.3%	$	773.2	91.1%	$	2,363.9	90.8%	$	2,167.1	91.1%
Underground facility locating	56.0		6.3	48.8		5.8	158.0		6.1	142.9		6.0
Electrical and gas utilities and other	30.0		3.4	26.2		3.1	80.2		3.1	69.1		2.9
Total contract revenues	$	884.1	100.0%	$	848.2	100.0%	$	2,602.1	100.0%	$	2,379.1	100.0%

Customers whose contract revenues exceeded 10% of total contract revenues during the three or nine months ended October 26, 2019 or October 27, 2018, as well as total contract revenues from all other customers combined, were as follows (dollars in millions):



	For the Three Months Ended						For the Nine Months Ended
	October 26, 2019			October 27, 2018			October 26, 2019			October 27, 2018
	Amount		% of Total	Amount		% of Total	Amount		% of Total	Amount		% of Total
Verizon Communications Inc.	$	182.1	20.6%	$	174.1	20.5%	$	566.9	21.8%	$	443.5	18.6%
CenturyLink, Inc.	164.1		18.6	118.8		14.0	412.7		15.9	316.0		13.3
AT&T Inc.	162.9		18.4	164.6		19.4	555.4		21.3	506.8		21.3
Comcast Corporation	131.3		14.9	176.3		20.8	401.6		15.4	506.7		21.3
Total other customers combined	243.7		27.5	214.4		25.3	665.5		25.6	606.1		25.5
Total contract revenues	$	884.1	100.0%	$	848.2	100.0%	$	2,602.1	100.0%	$	2,379.1	100.0%