DNS Report for comcast.com

• dns105.comcast.net

  • IPv4: 68.87.72.244
  • IPv6: 2001:558:100e:5:68:87:72:244
  • TTL (IPv4): 30 seconds
  • TTL (IPv6): 30 seconds
  • Recursive: N/A

• dns104.comcast.net

  • IPv4: 68.87.68.244
  • IPv6: 2001:558:100a:5:68:87:68:244
  • TTL (IPv4): 30 seconds
  • TTL (IPv6): 30 seconds
  • Recursive: N/A

• dns101.comcast.net

  • IPv4: 69.252.250.103
  • IPv6: 2001:558:fe23:8:69:252:250:103
  • TTL (IPv4): 30 seconds
  • TTL (IPv6): 30 seconds
  • Recursive: N/A

• dns102.comcast.net

  • IPv4: 68.87.85.132
  • IPv6: 2001:558:1004:7:68:87:85:132
  • TTL (IPv4): 30 seconds
  • TTL (IPv6): 30 seconds
  • Recursive: N/A

• dns103.comcast.net

  • IPv4: 68.87.76.228
  • IPv6: 2001:558:1014:c:68:87:76:228
  • TTL (IPv4): 30 seconds
  • TTL (IPv6): 30 seconds
  • Recursive: N/A

Nameserver Count - OK

• dns105.comcast.net

  • Status: Responded
  • IP(s): 96.99.227.0
  • TTL: 300 seconds
  • Recursive Queries: Does not allow recursive queries
  • TCP Connectivity: TCP connection failed (Response code: REFUSED)

• dns104.comcast.net

  • Status: Responded
  • IP(s): 96.99.227.0
  • TTL: 300 seconds
  • Recursive Queries: Does not allow recursive queries
  • TCP Connectivity: TCP connection failed (Response code: REFUSED)

• dns101.comcast.net

  • Status: Responded
  • IP(s): 96.99.227.0
  • TTL: 300 seconds
  • Recursive Queries: Does not allow recursive queries
  • TCP Connectivity: TCP connection failed (Response code: REFUSED)

• dns102.comcast.net

  • Status: Responded
  • IP(s): 96.99.227.0
  • TTL: 300 seconds
  • Recursive Queries: Does not allow recursive queries
  • TCP Connectivity: TCP connection failed (Response code: REFUSED)

• dns103.comcast.net

  • Status: Responded
  • IP(s): 96.99.227.0
  • TTL: 300 seconds
  • Recursive Queries: Does not allow recursive queries
  • TCP Connectivity: TCP connection failed (Response code: REFUSED)

dns105.comcast.net

• Serial: 2009102444
• Refresh: 7200
• Retry: 3600
• Expire: 1209600
• Minimum TTL: 900

dns104.comcast.net

• Serial: 2009102444
• Refresh: 7200
• Retry: 3600
• Expire: 1209600
• Minimum TTL: 900

dns101.comcast.net

• Serial: 2009102444
• Refresh: 7200
• Retry: 3600
• Expire: 1209600
• Minimum TTL: 900

dns102.comcast.net

• Serial: 2009102444
• Refresh: 7200
• Retry: 3600
• Expire: 1209600
• Minimum TTL: 900

dns103.comcast.net

• Serial: 2009102444
• Refresh: 7200
• Retry: 3600
• Expire: 1209600
• Minimum TTL: 900

Serial: 2009102444 - OK

REFRESH: 7200 - OK

RETRY: 3600 - OK

EXPIRE: 1209600 - OK

MINIMUM TTL: 900 - Note: Outside recommended range (1-3 hours)

dns105.comcast.net

• 5 mxa-00143702.gslb.pphosted.com ( 148.163.145.77 )
• 5 mxb-00143702.gslb.pphosted.com ( 148.163.141.77 )

dns104.comcast.net

• 5 mxa-00143702.gslb.pphosted.com ( 148.163.145.77 )
• 5 mxb-00143702.gslb.pphosted.com ( 148.163.141.77 )

dns101.comcast.net

• 5 mxa-00143702.gslb.pphosted.com ( 148.163.145.77 )
• 5 mxb-00143702.gslb.pphosted.com ( 148.163.145.77 )

dns102.comcast.net

• 5 mxa-00143702.gslb.pphosted.com ( 148.163.145.77 )
• 5 mxb-00143702.gslb.pphosted.com ( 148.163.145.77 )

dns103.comcast.net

• 5 mxa-00143702.gslb.pphosted.com ( 148.163.145.77 )
• 5 mxb-00143702.gslb.pphosted.com ( 148.163.145.77 )

MX Record Consistency - Warning: Inconsistencies found

MX Record Count - OK

• 77.145.163.148.in-addr.arpa -> mx0a-00143702.pphosted.com
• 77.145.163.148.in-addr.arpa -> mx0a-00143702.pphosted.com
• 77.141.163.148.in-addr.arpa -> mx0b-00143702.pphosted.com

PTR Records - OK

• Signed: Yes
• Validation: Successful
• DNSKEY Records: 2
• DS Records in parent zone: 0
• DS at Parent: False

DNSSEC - OK

SPF Record Published: Passed

Multiple SPF Records: Passed

SPF Record 1:

• Record: v=spf1
• SPF Syntax: Failed
• Deprecated Elements: Passed
• IP Addresses:
• Includes:
• DNS Lookups: 0
• Void Lookups: Passed
• Escaping Chars: Not Present
• All Mechanism: Not Present

Warnings:

• SPF record doesn't contain an 'all' mechanism

Errors:

• SPF record syntax is invalid

• DKIM Records Found: No

Warnings:

• No DKIM records found for common selectors

• Record: v=DMARC1;p=reject;fo=1;rua=mailto:[email protected],mailto:[email protected];ruf=mailto:[email protected]
• Syntax: Valid
• Policy: reject
• RUA (Aggregate Reports): mailto:[email protected], mailto:[email protected]
• RUF (Forensic Reports): mailto:[email protected]
• Failure Options (fo): 1

DMARC External Validation:

• Valid external domains: emaildefense.proofpoint.com, dmarctest.comcast.net, emaildefense.proofpoint.com
• All external domains in your DMARC record are giving permission to send them DMARC reports.