xnnd.com tools for dns
Domain Intelligence:

MX Lookup:
SPF Lookup:
DMARC Lookup:
rDNS Lookup:
rDNS Scan:

Other DNS Lookup:

ABUSE.NET Lookup: 
WHOIS Lookup: 
HSTS Check: 
SNDS Lookup: 
CIDR Calculator: 

For more information on spam, deliverability and blacklists,
visit Spam Resource and DNSBL Resource
Need more tools? Check out wiseTools
sec | Svr: 2 | xnnd.com access on Thu Jan 18 12:53:46 EST 2018 from 54.226.41.91
 xnnd simple tools for dns by al iverson since 2008