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 Fri Nov 24 11:20:14 EST 2017 from 54.162.250.227
 xnnd simple tools for dns by al iverson since 2008