Network Reference
Quick-reference pages for the things you Google constantly. Bookmark them once and stop searching.
Private IP Ranges
RFC 1918, RFC 6598 (CGNAT), loopback, link-local, multicast — every reserved IPv4 block in one table.
Open →Default Router IP Addresses
Common default gateway IPs and login credentials by router brand.
Open →Common Network Ports
TCP and UDP port assignments for the protocols you actually encounter.
Open →DNS Record Types
A, AAAA, MX, TXT, CNAME, NS, SOA, SRV, CAA — what each one does.
Open →