Local DNS lookups in OpenDNS stats

For a long time, but also just in the last three days, I've noticed queries such as these in my OpenDNS statistics:

• local
• *.in-addr.arpa
  
• users-pc
• users-android

... plus a whole bunch of queries to synology domains from the NAS

• checkip.synology.com
• checkipv6.synology.com
• payment.synology.com

despite configuring the firewall blacklist (via GUI) to block the static IP assigned to Synology NAS from WAN.

Is it indicative of local DNS...

Local DNS lookups in OpenDNS stats