Dnspark provide Primary DNS Hosting to help give you plenty of control over your domains and can cater for one domain only or up to a thousand domains and more if that is what you require.

In place for you to choose from is Base DNS Hosting and Standard DNS Hosting.

Both include the following features:

100% Uptime SLA
100% Web Based Management
Immediate Record Updates
5 Geographically Distributed Nameservers
All Common Record Types (A, CNAME, MX, NS, SOA, TXT, PTR)
Wildcard Records
Round Robin DNS
TTL Controls in SOA and Records
TTL Minimum
Dynamic DNS
TSIG Security by Default
Account Access Controls
Account Password Guessing Prevention
No Record Limits
5 Million Queries Per Month

Standard DNS Hosting also comes with the following additional features:
Web Guiding Url Redirection
Web Camping Parking Page
Mail Guiding Email Forwarding

The pricing for Base DNS Hosting is $8.95 per year and Standard DNS Hosting is priced at $13.95 per year.

There are various discounts in place for anywhere from 1-5 Domains to 1000+ Domains.

Query overage charges are below:

1 Million Excess Queries per month $5.50
5 Million Excess Queries per month $26.00
10 Million Excess Queries per month $48.00

See further details at Dnspark.com