SPF Record Checker

Please enter a host name to check.

Example host names with SPF records:
ipswitch.com, microsoft.com, google.com, gmail.com, apple.com, postini.com, ebay.com, orange.ch, bitcointalk.org, thecannells.org, facebook.com, shaw.ca, ubs.com, kitterman.com

SPF checker created by an author of the SPF RFC4408.
http://www.kitterman.com/spf/validate.html

 

The following nameservers for the host name facebook.com were found.
a.ns.facebook.com [129.134.30.12]
b.ns.facebook.com [129.134.31.12]
c.ns.facebook.com [185.89.218.12]
d.ns.facebook.com [185.89.219.12]

The following rules for the host name facebook.com were found. A total of 1 queries (as defined by RFC4408) were performed for fetching SPF and related records.
The DNS lookups for SPF took 169msec.
  1. Redirect to host _spf.facebook.com with 9 rules.
    1. Allow all from the range 66.220.144.128/25 (66.220.144.128 - 66.220.144.255)
    2. Allow all from the range 66.220.155.0/24 (66.220.155.0 - 66.220.155.255)
    3. Allow all from the range 66.220.157.0/25 (66.220.157.0 - 66.220.157.127)
    4. Allow all from the range 69.63.178.128/25 (69.63.178.128 - 69.63.178.255)
    5. Allow all from the range 69.63.181.0/24 (69.63.181.0 - 69.63.181.255)
    6. Allow all from the range 69.63.184.0/25 (69.63.184.0 - 69.63.184.127)
    7. Allow all from the range 69.171.232.0/24 (69.171.232.0 - 69.171.232.255)
    8. Allow all from the range 69.171.244.0/23 (69.171.244.0 - 69.171.245.255)
    9. Deny all IPs which do not match any previous rule