RFC 1918
Definitions
RFC 1918 is a DNS and IP Addressing term for the IETF best current practice that reserves 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16 for private IPv4 networks. It helps people and agents name the signal, source, and safe next step without pretending an automation, campaign, DNS record, RFC, or network path did more than the evidence shows. Source context: IETF DNS technology; RFC 1918 private address space; RFC 6598 shared address space.
“The home router said 192.168 again, and RFC 1918 calmly raised its hand like the class already covered this.”
Related Terms
- 10/8DNS and IP Addressing
10/8 is a DNS and IP Addressing term for the RFC 1918 private IPv4 block from 10.0.0.0 through 10.255.255.255, often used by large internal networks. It helps people and agents nam...
- 172.16/12DNS and IP Addressing
172.16/12 is a DNS and IP Addressing term for the RFC 1918 private IPv4 block from 172.16.0.0 through 172.31.255.255, a middle-size private range that people often misremember. It ...
- 192.168/16DNS and IP Addressing
192.168/16 is a DNS and IP Addressing term for the RFC 1918 private IPv4 block from 192.168.0.0 through 192.168.255.255, commonly seen on home and small office networks. It helps p...
- Authoritative DNS ServerDNS and IP Addressing
Authoritative DNS Server is a DNS and IP Addressing term for a DNS server that holds the source answer for a zone and can give final responses for records in that domain. It helps ...
- CIDRDNS and IP Addressing
CIDR is a DNS and IP Addressing term for Classless Inter-Domain Routing notation, such as /8 or /24, used to describe the network prefix length of an IP block. It helps people and ...
- Classful AddressingDNS and IP Addressing
Classful Addressing is a DNS and IP Addressing term for the older IPv4 class A, B, and C way of describing address blocks before CIDR became the normal way to express prefixes. It ...