DNS Report for fb.me

• b.ns.facebook.com

  • IPv4: 129.134.31.12
  • IPv6: 2a03:2880:f0fd:c:face:b00c:0:35
  • TTL (IPv4): 30 seconds
  • TTL (IPv6): 30 seconds
  • Recursive: N/A

• d.ns.facebook.com

  • IPv4: 185.89.219.12
  • IPv6: 2a03:2880:f1fd:c:face:b00c:0:35
  • TTL (IPv4): 30 seconds
  • TTL (IPv6): 30 seconds
  • Recursive: N/A

• c.ns.facebook.com

  • IPv4: 185.89.218.12
  • IPv6: 2a03:2880:f1fc:c:face:b00c:0:35
  • TTL (IPv4): 30 seconds
  • TTL (IPv6): 30 seconds
  • Recursive: N/A

• a.ns.facebook.com

  • IPv4: 129.134.30.12
  • IPv6: 2a03:2880:f0fc:c:face:b00c:0:35
  • TTL (IPv4): 30 seconds
  • TTL (IPv6): 30 seconds
  • Recursive: N/A

Nameserver Count - OK

• b.ns.facebook.com

  • Status: Responded
  • IP(s): 157.240.229.35
  • TTL: 60 seconds
  • Recursive Queries: Does not allow recursive queries
  • TCP Connectivity: TCP connection failed (Response code: REFUSED)

• d.ns.facebook.com

  • Status: Responded
  • IP(s): 157.240.229.35
  • TTL: 60 seconds
  • Recursive Queries: Does not allow recursive queries
  • TCP Connectivity: TCP connection failed (Response code: REFUSED)

• c.ns.facebook.com

  • Status: Responded
  • IP(s): 157.240.229.35
  • TTL: 60 seconds
  • Recursive Queries: Does not allow recursive queries
  • TCP Connectivity: TCP connection failed (Response code: REFUSED)

• a.ns.facebook.com

  • Status: Responded
  • IP(s): 157.240.229.35
  • TTL: 60 seconds
  • Recursive Queries: Does not allow recursive queries
  • TCP Connectivity: TCP connection failed (Response code: REFUSED)

b.ns.facebook.com

• Serial: 4207849484
• Refresh: 14400
• Retry: 1800
• Expire: 604800
• Minimum TTL: 3600

d.ns.facebook.com

• Serial: 4207849484
• Refresh: 14400
• Retry: 1800
• Expire: 604800
• Minimum TTL: 3600

c.ns.facebook.com

• Serial: 4207849484
• Refresh: 14400
• Retry: 1800
• Expire: 604800
• Minimum TTL: 3600

a.ns.facebook.com

• Serial: 4207849484
• Refresh: 14400
• Retry: 1800
• Expire: 604800
• Minimum TTL: 3600

Serial: 4207849484 - OK

REFRESH: 14400 - OK

RETRY: 1800 - OK

EXPIRE: 604800 - OK

MINIMUM TTL: 3600 - OK

b.ns.facebook.com

• 10 smtpin.vvv.facebook.com ( 69.171.251.251 )

d.ns.facebook.com

• 10 smtpin.vvv.facebook.com ( 173.252.87.251 )

c.ns.facebook.com

• 10 smtpin.vvv.facebook.com ( 69.171.251.251 )

a.ns.facebook.com

• 10 smtpin.vvv.facebook.com ( 66.220.149.251 )

MX Record Consistency - Warning: Inconsistencies found

MX Record Count - Warning: Only one MX record

• 251.87.252.173.in-addr.arpa -> msgin-regional-shv-01-rftw0.facebook.com
• 251.251.171.69.in-addr.arpa -> msgin-regional-shv-01-rash0.facebook.com
• 251.149.220.66.in-addr.arpa -> msgin-regional-shv-01-rprn0.facebook.com

PTR Records - OK

• Signed: No
• Validation: Failed
• DNSKEY Records: None
• DS Records in parent zone: None
• DS at Parent: None

DNSSEC - Note: Domain is not signed with DNSSEC

Error: No DNSSEC records found

SPF Record Published: Passed

Multiple SPF Records: Passed

SPF Record 1:

• Record: v=spf1 a ~all
• SPF Syntax: Failed
• Deprecated Elements: Passed
• IP Addresses:
• Includes:
• DNS Lookups: 2
• Void Lookups: Passed
• Escaping Chars: Not Present
• All Mechanism: ~all

Errors:

• SPF record syntax is invalid

• DKIM Records Found: No

Warnings:

• No DKIM records found for common selectors

• Record: None
• Syntax: Invalid
• Policy: None
• RUA (Aggregate Reports):

DMARC External Validation:

• All external domains in your DMARC record are giving permission to send them DMARC reports.

Errors:

• No DMARC record found