Classless Delegation

Back To Terms List

Delegation allows network administrators to provide authoritative reverse DNS on subnets that don’t fall on octet boundaries. For subnets smaller then a class C this is very useful. The main records for the delegation are PTR records, NS records and CNAME records.

A few of things that need to be remembered:
1. These are classless subnets, they don’t align themselves with class A, B, C, D, or E networks very well.
2. There can be only one primary authoritative name server of the class of IP addresses.
3. Since your ISP or upstream provider controls the class of IP addresses their cooperation is needed to provide reverse DNS. 

See Also:
Class A
Class B
Class C
PTR Records
NS Records
Cname Records
IP Address

Managed DNS, Redundant DNS, and Remotely Hosted DNS with LoadDNS 8.0

Managed DNS maximizes site and application uptime and responsiveness. Manage all DNS records and take advantage of SiteFailover, Directional DNS, IP Anycast DNS, DNS Load balancingWeb forwarding and URL forwarding with Managed DNS Enterprise and Deluxe. Businesses seeking a low cost hosted DNS solution should take a look at Managed DNS Basic. LoadDNS is remotely hosted, which means no software to install or hardware to maintain. With DNS servers located around the world, an easy to use Web interface, and full control over zone files, LoadDNS is the top choice for hosted DNS. Designed to handle millions of queries, LoadDNS can seamlessly scale with your growing business. Looking for the best partner program on the web, become an affiliate and earn 50% commissions.