Reverse DNS Lookup
Query public PTR records for an IPv4 address.
Useful tools for everyday technical work.
10 tools
Query public PTR records for an IPv4 address.
Calculate allowed downtime per day, week, month, and year.
Calculate actual availability from a period and downtime.
Look up OSI layers, VLAN ranges, common MTUs, and port ranges.
Query public DNS records through Google Public DNS.
Follow a guided sequence to isolate connection problems.
Build ping, traceroute, nslookup, or dig commands for a host.
Search, filter, highlight, and deduplicate logs locally.
Plan TTL reduction and a DNS change using explicit timestamps.
Track downtime allowance, consumption, and remaining reliability budget.