The -pn avoids the DNS lookup so that output is in dotted quad number format, avoiding the DNS lookup. I recall finding the "-p" slow (or something) likely on Windows, and I have since been recommending using "-pn". Likely to have been more than 13 years ago, and I can't find any note on the issue.
Statistics: Posted by GM8ARV — Fri Feb 13, 2026 9:59 am