The IPv6 addresses are entered in the form prefix_len suffix prefix_name, where
prefix_len is prefix length - decimal number between 0 and 128 inclusive,
suffix is address suffix in RFC 2373 form,
prefix_name is a prefix name if prefix length is not zero. For example 28 0:0001:CA00:: C.ISP.NET.. Most hosts have a single IPv6 address and therefore a single A6 record.

Routers (or hosts acting as routers) have multiple IPv6 addresses, and are commonly given more than one A6 record. Alternatively, each interface of the router can be given a name of its own, each with one A6 record.

By default, whenever an A record is added or removed, NameSurfer will automatically attempt to add or remove the corresponding reverse mapping. You can choose not to create the reverse map automatically by unchecking the checkbox controlling automatic reverse map creation.