SPF Check:
ascend.org

1. Specify domain name

Enter a domain to be checked for the SPF record
2. Specify IP address (optional)
Enter any IP address to check if it is authorized to send e-mails by the SPF record

What is the SPF lookup for?

With the SPF lookup you analyze the SPF record of a domain for errors, security risks and authorized IP addresses. Optionally, you can specify an IP address to check if it is authorized to send e-mail on behalf of the domain. The SPF lookup analyzes registered TXT records in real time. If you want to specify an SPF record manually, use the SPF Analyzer.

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SPF check passed

Your SPF record check result
  •   SPF record found
  •   Syntax check: 0 errors
  •   Email Anti-Spoofing: Good
Summary of the SPF check

Does a valid SPF record exist?
An SPF record was found for the domain ascend.org.
The SPF record for ascend.org is valid.
The syntax check of the SPF record shows no obvious errors.

Which IP-s are legitimate to send emails?
The SPF record contains a reference to external rules, which means that the validity of the SPF record depends on at least one other domain. A detailed list of the rules used externally can be found in the analysis result. In total, 160 IP address(es) were authorized by the SPF record to send emails.

The SPF record analysis was performed on 15.06.2024 at 19:16:08 clock.

Lookup for the domain:
ascend.org
IP address to be checked:
no IP address specified
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Evaluation for the domain ascend.org 

Nameserverset:
ns36.worldnic.com
ns35.worldnic.com
Determined SPF record:
Legitimated IP addresses:
IP Provider / ASN DNSBL-Check
52.101.42.4 MICROSOFT-CORP-MSN-AS-BLOCK blacklist 
52.101.194.19 MICROSOFT-CORP-MSN-AS-BLOCK blacklist 
52.101.11.3 MICROSOFT-CORP-MSN-AS-BLOCK blacklist 
52.101.40.1 MICROSOFT-CORP-MSN-AS-BLOCK blacklist 
52.101.8.32 MICROSOFT-CORP-MSN-AS-BLOCK blacklist 
52.101.10.8 MICROSOFT-CORP-MSN-AS-BLOCK blacklist 
52.101.41.0 MICROSOFT-CORP-MSN-AS-BLOCK blacklist 
40.92.0.0/15
MICROSOFT-CORP-MSN-AS-BLOCK blacklist 
40.107.0.0/16
MICROSOFT-CORP-MSN-AS-BLOCK blacklist 
52.100.0.0/14
MICROSOFT-CORP-MSN-AS-BLOCK blacklist 
104.47.0.0/17
MICROSOFT-CORP-MSN-AS-BLOCK blacklist 
2a01:111:f400::/48
MICROSOFT-CORP-MSN-AS-BLOCK blacklist 
2a01:111:f403::/49
MICROSOFT-CORP-MSN-AS-BLOCK blacklist 
2a01:111:f403:8000::/51
MICROSOFT-CORP-MSN-AS-BLOCK blacklist 
2a01:111:f403:c000::/51
MICROSOFT-CORP-MSN-AS-BLOCK blacklist 
2a01:111:f403:f000::/52
MICROSOFT-CORP-MSN-AS-BLOCK blacklist 
156.55.203.218/31
FNIS blacklist 
156.55.203.220 FNIS blacklist 
199.200.27.29 FNIS blacklist 
199.200.27.19 FNIS blacklist 
199.200.27.30 FNIS blacklist 
156.55.205.65 FNIS blacklist 
156.55.205.66 FNIS blacklist 
156.55.193.212/30
FNIS blacklist 
147.249.4.125 FNIS blacklist 
147.249.4.126/31
FNIS blacklist 
147.249.4.128/31
FNIS blacklist 
147.249.4.130 FNIS blacklist 
67.231.145.51 PROOFPOINT-ASN-US-WEST blacklist 
67.231.153.10 PROOFPOINT-ASN-US-EAST blacklist 
148.163.157.52 PROOFPOINT-ASN-US-WEST blacklist 
148.163.159.6 PROOFPOINT-ASN-US-EAST blacklist 
34.75.49.213 GOOGLE-CLOUD-PLATFORM blacklist 
35.229.62.77 GOOGLE-CLOUD-PLATFORM blacklist 
34.75.16.178 GOOGLE-CLOUD-PLATFORM blacklist 
35.184.208.151 GOOGLE-CLOUD-PLATFORM blacklist 
144.86.200.12 SWBC-ASN blacklist 
144.86.201.33 SWBC-ASN blacklist 
174.46.62.33 LVLT-3549 blacklist 
174.46.62.13 LVLT-3549 blacklist 
144.86.200.33 SWBC-ASN blacklist 
144.86.201.12 SWBC-ASN blacklist 
144.86.201.110 SWBC-ASN blacklist 
144.86.201.111 SWBC-ASN blacklist 
23.21.109.197 AMAZON-AES blacklist 
23.21.109.212 AMAZON-AES blacklist 
147.160.167.14 AMAZON-AES blacklist 
147.160.167.15 AMAZON-AES blacklist 
52.49.235.189 AMAZON-02 blacklist 
52.49.201.246 AMAZON-02 blacklist 
35.174.145.124/32
AMAZON-AES blacklist 
3.214.204.181/32
AMAZON-AES blacklist 
52.212.19.177/32
AMAZON-02 blacklist 
52.17.62.50/32
AMAZON-02 blacklist 
15.222.110.90/32
AMAZON-02 blacklist 
52.60.189.48/32
AMAZON-02 blacklist 
13.211.69.231/32
AMAZON-02 blacklist 
3.105.224.60/32
AMAZON-02 blacklist 
3.109.187.96/32
AMAZON-02 blacklist 
43.204.62.184/32
AMAZON-02 blacklist 
44.211.178.96/27
AMAZON-AES blacklist 
3.101.216.128/27
AMAZON-02 blacklist 
3.252.108.160/27
AMAZON-02 blacklist 
13.39.103.0/27
AMAZON-02 blacklist 
3.99.253.64/27
AMAZON-02 blacklist 
3.27.51.160/27
AMAZON-02 blacklist 
43.205.150.240/28
AMAZON-02 blacklist 
18.143.136.64/27
AMAZON-02 blacklist 
3.29.194.128/27
AMAZON-02 blacklist 
13.42.61.32/27
AMAZON-02 blacklist 
208.81.32.0/24
MLCRIF blacklist 
208.81.34.0/24
MLCRIF blacklist 
64.124.120.0/24
MLOC blacklist 
148.59.151.0/24
QTS-SUW1-ATL1 blacklist 
209.208.209.0/24
QTS-MIA blacklist 
149.72.128.180 SENDGRID blacklist 
20.184.246.208/28
MICROSOFT-CORP-MSN-AS-BLOCK blacklist 
160.253.95.9/32
AS-MONTGOMERY-COLLEGE-AS1 blacklist 
209.208.209.0/24
QTS-MIA blacklist 
64.124.120.0/24
MLOC blacklist 
208.63.79.0/24
BELLSOUTH-NET-BLK blacklist 
149.72.140.73 SENDGRID blacklist 
3.214.204.181 AMAZON-AES blacklist 
44.211.178.112/28
AMAZON-AES blacklist 
3.101.216.144/28
AMAZON-02 blacklist 
69.38.149.224/27
TWRS-MA blacklist 
208.252.57.192/27
UUNET blacklist 
71.80.37.162 CHARTER-20115 blacklist 
20.115.59.230 MICROSOFT-CORP-MSN-AS-BLOCK blacklist 
20.55.20.145 MICROSOFT-CORP-MSN-AS-BLOCK blacklist 
44.214.246.148/32
AMAZON-AES blacklist 
20.115.59.232/32
MICROSOFT-CORP-MSN-AS-BLOCK blacklist 
74.217.49.0/25
INTERNAP-BLK3 blacklist 
69.25.227.128/25
ASN-INTERNAP-BLK blacklist 
216.79.52.226/27
BELLSOUTH-NET-BLK blacklist 
63.117.120.96/27
UUNET blacklist 
69.38.149.224/27
TWRS-MA blacklist 
208.252.57.192/27
UUNET blacklist 
199.255.192.0/22
AMAZON-02 blacklist 
199.127.232.0/22
AMAZON-02 blacklist 
54.240.0.0/18
AMAZON-02 blacklist 
69.169.224.0/20
AMAZON-02 blacklist 
76.223.176.0/24
AMAZON-02 blacklist 
76.223.180.0/23
AMAZON-02 blacklist 
76.223.188.0/24
AMAZON-02 blacklist 
76.223.189.0/24
AMAZON-02 blacklist 
76.223.190.0/24
AMAZON-02 blacklist 
104.130.239.90 RACKSPACE blacklist 
144.86.200.0/22
SWBC-ASN blacklist 
66.193.114.0/25
LVLT-3549 blacklist 
209.34.255.0/24
ASN-FLEXENTIAL blacklist 
66.179.179.85/32
UNITAS blacklist 
63.160.1.66/32
COGENT-174 blacklist 
156.55.193.212/30
FNIS blacklist 
199.200.27.18/31
FNIS blacklist 
199.200.27.29 FNIS blacklist 
199.200.27.30 FNIS blacklist 
206.71.18.20/31
FNIS blacklist 
208.93.26.27 FDCSGNET blacklist 
166.73.7.16 FDCSGNET blacklist 
166.73.7.20 FDCSGNET blacklist 
166.73.14.61 FDCSGNET blacklist 
166.73.14.63 FDCSGNET blacklist 
166.73.92.61 FDCSGNET blacklist 
166.73.92.63 FDCSGNET blacklist 
166.73.92.60 FDCSGNET blacklist 
208.235.248.20 FDCSGNET blacklist 
50.58.9.15 FDCSGNET blacklist 
204.95.150.215 FDCSGNET blacklist 
208.66.22.33 FDCSGNET blacklist 
12.108.255.69 INS-AS blacklist 
148.163.140.179 PROOFPOINT-ASN-US-EAST blacklist 
148.163.144.176 PROOFPOINT-ASN-US-WEST blacklist 
205.220.167.111 PROOFPOINT-ASN-US-WEST blacklist 
205.220.177.241 PROOFPOINT-ASN-US-EAST blacklist 
205.220.183.227 PROOFPOINT-ASN-US-EAST blacklist 
205.220.183.228 PROOFPOINT-ASN-US-EAST blacklist 
205.220.183.229 PROOFPOINT-ASN-US-EAST blacklist 
205.220.183.230 PROOFPOINT-ASN-US-EAST blacklist 
205.220.183.231 PROOFPOINT-ASN-US-EAST blacklist 
205.220.171.227 PROOFPOINT-ASN-US-WEST blacklist 
205.220.171.228 PROOFPOINT-ASN-US-WEST blacklist 
205.220.171.229 PROOFPOINT-ASN-US-WEST blacklist 
205.220.171.230 PROOFPOINT-ASN-US-WEST blacklist 
205.220.171.231 PROOFPOINT-ASN-US-WEST blacklist 
206.107.78.0/24
COGENT-174 blacklist 
208.2.188.0/23
COGENT-174 blacklist 
208.35.184.0/21
COGENT-174 blacklist 
208.29.163.0/24
COGENT-174 blacklist 
63.172.232.0/21
COGENT-174 blacklist 
65.205.252.0/24
UUNET blacklist 
67.135.240.0/24
CENTURYLINK-US-LEGACY-QWEST blacklist 
65.241.35.0/24
UUNET blacklist 
207.1.168.0/24
CENTURYLINK-LEGACY-SAVVIS blacklist 
206.108.40.0/24
- blacklist 
208.35.189.0/24
COGENT-174 blacklist 
208.35.190.0/24
COGENT-174 blacklist 
209.195.52.0/24
COLOBLOX blacklist 
208.147.64.0/24
CENTURYLINK-LEGACY-SAVVIS blacklist 
63.117.120.96/27
UUNET blacklist 
SPF-Syntax Check:
Analysis result of the SPF record for the domain: ascend.org

SPF record available?

We found an SPF record for the domain.

v=spf1

Additionally authorized A-records?

In addition to the A-records stored in the DNS, we were able to find further records authorized in the SPF-record

144.86.200.12
144.86.201.33
174.46.62.33
174.46.62.13
144.86.200.33
144.86.201.12
144.86.201.110
144.86.201.111

Are the registered mail servers allowed to send e-mails?

The mechanism 'mx' was set in the SPF entry. The following hosts are allowed to send

ascend-org.mail.protection.outlook.com
ascend-org.mail.protection.outlook.com
ascend-org.mail.protection.outlook.com
ascend-org.mail.protection.outlook.com
ascend-org.mail.protection.outlook.com
ascend-org.mail.protection.outlook.com
ascend-org.mail.protection.outlook.com

Additionally authorized IPv4 addresses

Explicit IPv4 addresses in the SPF record have been authorized to send

216.79.52.226/27
63.117.120.96/27
69.38.149.224/27
208.252.57.192/27
199.255.192.0/22
199.127.232.0/22
54.240.0.0/18
69.169.224.0/20
76.223.176.0/24
76.223.180.0/23
76.223.188.0/24
76.223.189.0/24
76.223.190.0/24
104.130.239.90
144.86.200.0/22
66.193.114.0/25
209.34.255.0/24
66.179.179.85/32
63.160.1.66/32
156.55.193.212/30
199.200.27.18/31
199.200.27.29
199.200.27.30
206.71.18.20/31
206.107.78.0/24
208.2.188.0/23
208.35.184.0/21
208.29.163.0/24
63.172.232.0/21
65.205.252.0/24
67.135.240.0/24
65.241.35.0/24
207.1.168.0/24
206.108.40.0/24
208.35.189.0/24
208.35.190.0/24
209.195.52.0/24
208.147.64.0/24
63.117.120.96/27

Additional external SPF records

We could find other records authorized in the SPF record

include:spf.protection.outlook.com
v=spf1 ip4:40.92.0.0/15 ip4:40.107.0.0/16 ip4:52.100.0.0/14 ip4:104.47.0.0/17 ip6:2a01:111:f400::/48 ip6:2a01:111:f403::/49 ip6:2a01:111:f403:8000::/51 ip6:2a01:111:f403:c000::/51 ip6:2a01:111:f403:f000::/52 -all
ipv4:
40.92.0.0/15
ipv4:
40.107.0.0/16
ipv4:
52.100.0.0/14
ipv4:
104.47.0.0/17
ipv6:
2a01:111:f400::/48
ipv6:
2a01:111:f403::/49
ipv6:
2a01:111:f403:8000::/51
ipv6:
2a01:111:f403:c000::/51
ipv6:
2a01:111:f403:f000::/52
include:spfhost.messageprovider.com
v=spf1 ip4:156.55.203.218/31 ip4:156.55.203.220 ip4:199.200.27.29 ip4:199.200.27.19 ip4:199.200.27.30 ip4:156.55.205.65 ip4:156.55.205.66 ip4:156.55.193.212/30 ip4:147.249.4.125 ip4:147.249.4.126/31 ip4:147.249.4.128/31 ip4:147.249.4.130 ip4:67.231.145.51 ip4:67.231.153.10 ip4:148.163.157.52 ip4:148.163.159.6 -all
ipv4:
156.55.203.218/31
ipv4:
156.55.203.220
ipv4:
199.200.27.29
ipv4:
199.200.27.19
ipv4:
199.200.27.30
ipv4:
156.55.205.65
ipv4:
156.55.205.66
ipv4:
156.55.193.212/30
ipv4:
147.249.4.125
ipv4:
147.249.4.126/31
ipv4:
147.249.4.128/31
ipv4:
147.249.4.130
ipv4:
67.231.145.51
ipv4:
67.231.153.10
ipv4:
148.163.157.52
ipv4:
148.163.159.6
include:_spf01.mykronos.com
v=spf1 ip4:34.75.49.213 ip4:35.229.62.77 ip4:34.75.16.178 ip4:35.184.208.151 -all
ipv4:
34.75.49.213
ipv4:
35.229.62.77
ipv4:
34.75.16.178
ipv4:
35.184.208.151
unknown:
include:spf.external.ascend.org
v=spf1 include:_spf.psm.knowbe4.com include:spfa.cpmails.com include:spf.meridianlink.com ip4:209.208.209.0/24 ip4:64.124.120.0/24 ip4:208.63.79.0/24 ip4:149.72.140.73 ip4:3.214.204.181 ip4:44.211.178.112/28 ip4:3.101.216.144/28 ip4:69.38.149.224/27 ip4:208.252.57.192/27 ip4:71.80.37.162 ip4:20.115.59.230 ip4:20.55.20.145 ip4:44.214.246.148/32 ip4:20.115.59.232/32 ip4:74.217.49.0/25 ip4:69.25.227.128/25
ipv4:
209.208.209.0/24
ipv4:
64.124.120.0/24
ipv4:
208.63.79.0/24
ipv4:
149.72.140.73
ipv4:
3.214.204.181
ipv4:
44.211.178.112/28
ipv4:
3.101.216.144/28
ipv4:
69.38.149.224/27
ipv4:
208.252.57.192/27
ipv4:
71.80.37.162
ipv4:
20.115.59.230
ipv4:
20.55.20.145
ipv4:
44.214.246.148/32
ipv4:
20.115.59.232/32
ipv4:
74.217.49.0/25
ipv4:
69.25.227.128/25
include:_spf.psm.knowbe4.com
v=spf1 ip4:23.21.109.197 ip4:23.21.109.212 ip4:147.160.167.14 ip4:147.160.167.15 ip4:52.49.235.189 ip4:52.49.201.246 -all
ipv4:
23.21.109.197
ipv4:
23.21.109.212
ipv4:
147.160.167.14
ipv4:
147.160.167.15
ipv4:
52.49.235.189
ipv4:
52.49.201.246
include:spfa.cpmails.com
v=spf1 ip4:35.174.145.124/32 ip4:3.214.204.181/32 ip4:52.212.19.177/32 ip4:52.17.62.50/32 ip4:15.222.110.90/32 ip4:52.60.189.48/32 ip4:13.211.69.231/32 ip4:3.105.224.60/32 ip4:3.109.187.96/32 ip4:43.204.62.184/32 ip4:44.211.178.96/27 ip4:3.101.216.128/27 ip4:3.252.108.160/27 ip4:13.39.103.0/27 ip4:3.99.253.64/27 ip4:3.27.51.160/27 ip4:43.205.150.240/28 ip4:18.143.136.64/27 ip4:3.29.194.128/27 ip4:13.42.61.32/27 -all
ipv4:
35.174.145.124/32
ipv4:
3.214.204.181/32
ipv4:
52.212.19.177/32
ipv4:
52.17.62.50/32
ipv4:
15.222.110.90/32
ipv4:
52.60.189.48/32
ipv4:
13.211.69.231/32
ipv4:
3.105.224.60/32
ipv4:
3.109.187.96/32
ipv4:
43.204.62.184/32
ipv4:
44.211.178.96/27
ipv4:
3.101.216.128/27
ipv4:
3.252.108.160/27
ipv4:
13.39.103.0/27
ipv4:
3.99.253.64/27
ipv4:
3.27.51.160/27
ipv4:
43.205.150.240/28
ipv4:
18.143.136.64/27
ipv4:
3.29.194.128/27
ipv4:
13.42.61.32/27
include:spf.meridianlink.com
v=spf1 ip4:208.81.32.0/24 ip4:208.81.34.0/24 ip4:64.124.120.0/24 ip4:148.59.151.0/24 ip4:209.208.209.0/24 ip4:149.72.128.180 ip4:20.184.246.208/28 ip4:160.253.95.9/32 -all
ipv4:
208.81.32.0/24
ipv4:
208.81.34.0/24
ipv4:
64.124.120.0/24
ipv4:
148.59.151.0/24
ipv4:
209.208.209.0/24
ipv4:
149.72.128.180
ipv4:
20.184.246.208/28
ipv4:
160.253.95.9/32
include:spf.cashedge.com
v=spf1 ip4:208.93.26.27 ip4:166.73.7.16 ip4:166.73.7.20 ip4:166.73.14.61 ip4:166.73.14.63 ip4:166.73.92.61 ip4:166.73.92.63 ip4:166.73.92.60 ip4:208.235.248.20 ip4:50.58.9.15 ip4:204.95.150.215 ip4:208.66.22.33 ip4:12.108.255.69 ip4:148.163.140.179 ip4:148.163.144.176 ip4:205.220.167.111 ip4:205.220.177.241 ip4:205.220.183.227 ip4:205.220.183.228 ip4:205.220.183.229 ip4:205.220.183.230 ip4:205.220.183.231 ip4:205.220.171.227 ip4:205.220.171.228 ip4:205.220.171.229 ip4:205.220.171.230 ip4:205.220.171.231 ~all
ipv4:
208.93.26.27
ipv4:
166.73.7.16
ipv4:
166.73.7.20
ipv4:
166.73.14.61
ipv4:
166.73.14.63
ipv4:
166.73.92.61
ipv4:
166.73.92.63
ipv4:
166.73.92.60
ipv4:
208.235.248.20
ipv4:
50.58.9.15
ipv4:
204.95.150.215
ipv4:
208.66.22.33
ipv4:
12.108.255.69
ipv4:
148.163.140.179
ipv4:
148.163.144.176
ipv4:
205.220.167.111
ipv4:
205.220.177.241
ipv4:
205.220.183.227
ipv4:
205.220.183.228
ipv4:
205.220.183.229
ipv4:
205.220.183.230
ipv4:
205.220.183.231
ipv4:
205.220.171.227
ipv4:
205.220.171.228
ipv4:
205.220.171.229
ipv4:
205.220.171.230
ipv4:
205.220.171.231

E-Mail handling

How should the checkHost() function of the e-mail server handle the e-mail? (syntax )

~all
SoftFail (non-compliant e-mails are accepted but marked)

Will be forwarded to another SPF record?

There is no reference to any other SPF record

Are the server addresses allowed to send e-mails?

In the SPF entry the mechanism 'a' has not been set.

Additionally authorized MX records

We could not find any other records authorized in the SPF record besides the MX records stored in the DNS

Additionally authorized IPv6 addresses

No explicit IPv6 addresses in the SPF record have been authorised to send

How is the sender informed?

The exp mechanism acts as a return to the sender if the IP address was not authorized to send and notify them. None was found.

PTR (obsolete mechanism)

The ptr mechanism is deprecated, slow and insecure and should not be used

PTR:

The ptr mechanism is deprecated, slow and insecure and should not be used

Authorize IP addresses with markers

When SPF is evaluated, macros can specifically authorize Ip addresses based on the request or connection of the user or client (RFC7208 )

Receiver address

analysis.ra-missing

Amount of reports

analysis.rp-missing

Report selection

analysis.rr-missing

Unknown mechanisms

No unknown mechanisms were found in the SPF record.

Recently performed SPF lookups

Server IP Address

We have determined the following IP address for the domain:

No domain specified

Reverse address

We have determined the following name for the server IP address:

20.115.59.232

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