One can easily serve these kinds of zones with a mixture of PowerDNS and a custom backend which generates the records on the fly.

I have recently been playing with dhcpv6 to assign IP's on my network at home rather than using stateless router advertisements and as part of this found out that you can use the $GENERATE directive with bind for IPv6 addressing. The documentation on it is a bit thin on the ground and there don't appear to be any examples found in google but I came up with this. Forward zone: Reverse zone: This generates addresses between 20 and 29 with the format dhcp-??.example.com and 2001:db8:1234:0::??. It's a little more complicated to do than the equivalent for IPv4 addressing as you are dealing with hexadecimal and nibbles. The 32-41 is decimal for 20-29 in hex. The 0,31,n means output 31 characters in nibble format and the 0,0,x means output in hex format. You could also change that to d for decimal. The 31 character nibble size is designed to populate a /48 sized zone file where I've just used the origin as "4.3.2.1.3.8.b.d.0.1.0.0.2.ip6.arpa". Obviously addresses have been altered to protect the innocent!