DNS Report for masterclass.com

• elmo.ns.cloudflare.com

  • IPv4: 108.162.193.163, 173.245.59.163, 172.64.33.163
  • IPv6: 2606:4700:58::adf5:3ba3, 2803:f800:50::6ca2:c1a3, 2a06:98c1:50::ac40:21a3
  • TTL (IPv4): 30 seconds
  • TTL (IPv6): 30 seconds
  • Recursive: N/A

• lara.ns.cloudflare.com

  • IPv4: 173.245.58.128, 108.162.192.128, 172.64.32.128
  • IPv6: 2a06:98c1:50::ac40:2080, 2606:4700:50::adf5:3a80, 2803:f800:50::6ca2:c080
  • TTL (IPv4): 30 seconds
  • TTL (IPv6): 30 seconds
  • Recursive: N/A

Nameserver Count - OK

• elmo.ns.cloudflare.com

  • Status: Responded
  • IP(s): 104.17.12.109, 104.17.11.109
  • TTL: 300 seconds
  • Recursive Queries: Allows recursive queries
  • TCP Connectivity: Allows TCP connections

• lara.ns.cloudflare.com

  • Status: Responded
  • IP(s): 104.17.12.109, 104.17.11.109
  • TTL: 300 seconds
  • Recursive Queries: Allows recursive queries
  • TCP Connectivity: Allows TCP connections

elmo.ns.cloudflare.com

• Serial: 2348553995
• Refresh: 10000
• Retry: 2400
• Expire: 604800
• Minimum TTL: 1800

lara.ns.cloudflare.com

• Serial: 2348553995
• Refresh: 10000
• Retry: 2400
• Expire: 604800
• Minimum TTL: 1800

Serial: 2348553995 - OK

REFRESH: 10000 - OK

RETRY: 2400 - OK

EXPIRE: 604800 - OK

MINIMUM TTL: 1800 - Note: Outside recommended range (1-3 hours)

elmo.ns.cloudflare.com

• 1 aspmx.l.google.com ( 142.251.167.26 )
• 5 alt1.aspmx.l.google.com ( 209.85.202.26 )
• 5 alt2.aspmx.l.google.com ( 64.233.184.26 )
• 10 alt3.aspmx.l.google.com ( 142.250.27.26 )
• 10 alt4.aspmx.l.google.com ( 142.250.153.27 )

lara.ns.cloudflare.com

• 1 aspmx.l.google.com ( 142.251.167.26 )
• 5 alt1.aspmx.l.google.com ( 209.85.202.26 )
• 5 alt2.aspmx.l.google.com ( 64.233.184.26 )
• 10 alt3.aspmx.l.google.com ( 142.250.27.26 )
• 10 alt4.aspmx.l.google.com ( 142.250.153.27 )

MX Record Consistency - OK

MX Record Count - OK

• 26.167.251.142.in-addr.arpa -> ww-in-f26.1e100.net
• 26.27.250.142.in-addr.arpa -> ra-in-f26.1e100.net
• 26.202.85.209.in-addr.arpa -> dg-in-f26.1e100.net
• 27.153.250.142.in-addr.arpa -> ea-in-f27.1e100.net
• 26.184.233.64.in-addr.arpa -> wa-in-f26.1e100.net

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 ip4:198.245.81.0/24 ip4:136.147.176.0/24 ip4:13.111.0.0/16 ip4:136.147.182.0/24 ip4:136.147.135.0/24 ip4:199.122.123.0/24 ip4:167.89.0.0/17 ip4:168.245.0.0/17 ip4:185.250.239.148 ip4:185.250.239.168 ip4:185.250.239.190 ip4:198.244.59.30 ip4:198.244
• SPF Syntax: Passed
• Deprecated Elements: Passed
• IP Addresses: 198.245.81.0/24, 136.147.176.0/24, 13.111.0.0/16, 136.147.182.0/24, 136.147.135.0/24, 199.122.123.0/24, 167.89.0.0/17, 168.245.0.0/17, 185.250.239.148, 185.250.239.168, 185.250.239.190, 198.244.59.30, 198.244
• Includes:
• DNS Lookups: 0
• Void Lookups: Passed
• Escaping Chars: Not Present
• All Mechanism: Not Present

Warnings:

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

• DKIM Records Found: Yes
• Selectors Found: google
• Selector 'google':
  Record: v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCGi1+J800hpTXxtldw8ketxdnk27bU1POHDLDnMcs0x/j6caZNhhtnDXGATn64Wa1Lo6EaKYRkxykJp4z2Yd3ixRlSS3LXyS0w+d55NHl2cgr9469JG1zFTAYv1MCpxtGXQjWr2SRnYQSKxdVa4NGTqQ2+8jXWzWADdpAn05myhwIDAQAB
• Valid Syntax: Yes

• Record: v=DMARC1; p=reject; fo=1; ri=3600; rua=mailto:[email protected]; ruf=mailto:[email protected];
• Syntax: Valid
• Policy: reject
• RUA (Aggregate Reports): mailto:[email protected]
• RUF (Forensic Reports): mailto:[email protected]
• Failure Options (fo): 1
• Reporting Interval: 3600 seconds

DMARC External Validation:

• Valid external domains: ag.dmarcian.com, fr.dmarcian.com
• All external domains in your DMARC record are giving permission to send them DMARC reports.