For additional redundancy, please add our two local nameservers both to your zones (NS records) and to your domain registrations:

@ IN NS ns4.by-design.net.
@ IN NS ns5.by-design.net.

This will provide added protection against any FastZoneFiles outages. Please contact us at support@by-design.net if you need assistance with this.

NOTE: If you have secondary/slave zones and limit or filter DNS zone transfers, you must permit these IP ranges (port 53, both TCP and UDP) to pull your zones:


50.56.152.0/24
65.61.138.0/24
67.66.138.0/24
68.188.63.0/24
69.20.61.0/24
72.3.133.0/24
72.32.58.0/24
89.234.11.0/24
89.234.7.0/24
207.97.208.0/24

Added in September 2013:

173.203.184.0/24