When CenturyLink's acquisition of Level 3 was announced, the reported size of the combined company was 52,500 employees.
In CenturyLink's 2017 10K filing with the SEC, it reads, "At the end of December 31, 2017, we had approximately 51,000 employees...".
In the most recent layoff news for CenturyLink, it shows the company with roughly 50,000 employees before cutting another 2% of the employees.
So... 52,500... then 51,000... then 50,000... now 49,000...
So if the reported numbers are accurate, from the time of announced acquisition of Level 3 to today - the combined company dropped about 3,500 employees (or -6.7%). This doesn't take into account any new hires too.
Perhaps that is part of the strategy - to do layoffs in small enough slices, so that it doesn't get attention.