ntis.gov SPF record

1 / 10 Lookups
0 Issues
458,756 IPv4 addresses
2.19 ⋅ 10 24 IPv6 addresses
v=spf1 ip4:204.193.226.136 ip4:204.193.227.152 ip4:204.193.227.153 ip4:170.110.225.186 include:spf.protection.outlook.com -all Copied

Terms

ip4:
204.193.226.136 / 32
pass if the sender's IP is between
204.193.226.136 and 204.193.226.136 (inclusive).
or else
ip4:
204.193.227.152 / 32
pass if the sender's IP is between
204.193.227.152 and 204.193.227.152 (inclusive).
or else
ip4:
204.193.227.153 / 32
pass if the sender's IP is between
204.193.227.153 and 204.193.227.153 (inclusive).
or else
ip4:
170.110.225.186 / 32
pass if the sender's IP is between
170.110.225.186 and 170.110.225.186 (inclusive).
U.S. Department of Commerce, HQ and ITA
AS33343
or else
include:
spf.protection.outlook.com
Evaluate this SPF record and pass if it
passes.
Microsoft 365 / Outlook
Inbox software
or else
-all
fail the email's SPF check.

Included records

v=spf1 ip4:204.193.226.136 ip4:204.193.227.152 ip4:204.193.227.153 ip4:170.110.225.186 include:spf.protection.outlook.com -all
6 x ip4 5 x ip6 -all

IP ranges

204.193.226.136
204.193.227.152
204.193.227.153
170.110.225.186
U.S. Department of Commerce, HQ and ITA
AS33343
40.92.0.0 / 15
Microsoft
AS8075
40.107.0.0 / 16
Microsoft
AS8075
52.100.0.0 / 15
Microsoft
AS8075
52.102.0.0 / 16
Microsoft
AS8075
52.103.0.0 / 17
Microsoft
AS8075
104.47.0.0 / 17
Microsoft
AS8075
2a01:111:f400:: / 48
Microsoft
AS8075
2a01:111:f403:: / 49
Microsoft
AS8075
2a01:111:f403:8000:: / 51
Microsoft
AS8075
2a01:111:f403:c000:: / 51
Microsoft
AS8075
2a01:111:f403:f000:: / 52
Microsoft
AS8075