Httpfy

DNS Report for columbia.edu

Date Generated: 2024-08-12 03:07:28
Check Another Domain

Nameservers

  • auth2.dns.cogentco.com
    • IPv4: 66.28.0.30
    • IPv6: 2001:550:1:b::d
    • TTL (IPv4): 30 seconds
    • TTL (IPv6): 30 seconds
    • Recursive: N/A
  • auth5.dns.cogentco.com
    • IPv4: 80.91.64.50
    • IPv6: 2001:978:1:b::d
    • TTL (IPv4): 30 seconds
    • TTL (IPv6): 30 seconds
    • Recursive: N/A
  • ext-ns1.columbia.edu
    • IPv4: 128.59.1.1
    • IPv6: 2001:18d8:1::1:1, 2001:18d8::35
    • TTL (IPv4): 30 seconds
    • TTL (IPv6): 30 seconds
    • Recursive: N/A
  • auth4.dns.cogentco.com
    • IPv4: 80.245.32.74
    • IPv6: 2001:978:1:a::d
    • TTL (IPv4): 30 seconds
    • TTL (IPv6): 30 seconds
    • Recursive: N/A
  • ns1.lse.ac.uk
    • IPv4: 158.143.96.8
    • IPv6: No IPv6 found
    • TTL (IPv4): 30 seconds
    • TTL (IPv6): N/A seconds
    • Recursive: N/A
  • auth1.dns.cogentco.com
    • IPv4: 66.28.0.14
    • IPv6: 2001:550:1:a::d
    • TTL (IPv4): 30 seconds
    • TTL (IPv6): 30 seconds
    • Recursive: N/A

Nameserver Count - OK

Nameserver Queries

  • auth2.dns.cogentco.com
    • Status: Responded
    • IP(s): 162.159.138.64, 162.159.128.65
    • TTL: 3600 seconds
    • Recursive Queries: Does not allow recursive queries
    • TCP Connectivity: TCP connection failed (Response code: REFUSED)
  • auth5.dns.cogentco.com
    • Status: Responded
    • IP(s): 162.159.128.65, 162.159.138.64
    • TTL: 3600 seconds
    • Recursive Queries: Does not allow recursive queries
    • TCP Connectivity: TCP connection failed (Response code: REFUSED)
  • ext-ns1.columbia.edu
    • Status: Responded
    • IP(s): 162.159.138.64, 162.159.128.65
    • TTL: 3600 seconds
    • Recursive Queries: Does not allow recursive queries
    • TCP Connectivity: TCP connection failed (Response code: REFUSED)
  • auth4.dns.cogentco.com
    • Status: Responded
    • IP(s): 162.159.138.64, 162.159.128.65
    • TTL: 3600 seconds
    • Recursive Queries: Does not allow recursive queries
    • TCP Connectivity: TCP connection failed (Response code: REFUSED)
  • ns1.lse.ac.uk
    • Status: Responded
    • IP(s): 162.159.138.64, 162.159.128.65
    • TTL: 3600 seconds
    • Recursive Queries: Does not allow recursive queries
    • TCP Connectivity: TCP connection failed (Response code: REFUSED)
  • auth1.dns.cogentco.com
    • Status: Responded
    • IP(s): 162.159.128.65, 162.159.138.64
    • TTL: 3600 seconds
    • Recursive Queries: Does not allow recursive queries
    • TCP Connectivity: TCP connection failed (Response code: REFUSED)

SOA Records

auth2.dns.cogentco.com
  • Serial: 85725
  • Refresh: 3600
  • Retry: 1800
  • Expire: 2419200
  • Minimum TTL: 300
auth5.dns.cogentco.com
  • Serial: 85725
  • Refresh: 3600
  • Retry: 1800
  • Expire: 2419200
  • Minimum TTL: 300
ext-ns1.columbia.edu
  • Serial: 85725
  • Refresh: 3600
  • Retry: 1800
  • Expire: 2419200
  • Minimum TTL: 300
auth4.dns.cogentco.com
  • Serial: 85725
  • Refresh: 3600
  • Retry: 1800
  • Expire: 2419200
  • Minimum TTL: 300
ns1.lse.ac.uk
  • Serial: 85725
  • Refresh: 3600
  • Retry: 1800
  • Expire: 2419200
  • Minimum TTL: 300
auth1.dns.cogentco.com
  • Serial: 85725
  • Refresh: 3600
  • Retry: 1800
  • Expire: 2419200
  • Minimum TTL: 300

Serial: 85725 - OK

REFRESH: 3600 - OK

RETRY: 1800 - OK

EXPIRE: 2419200 - OK

MINIMUM TTL: 300 - Note: Outside recommended range (1-3 hours)

MX Records

auth2.dns.cogentco.com
auth5.dns.cogentco.com
ext-ns1.columbia.edu
auth4.dns.cogentco.com
ns1.lse.ac.uk
auth1.dns.cogentco.com

MX Record Consistency - OK

MX Record Count - OK

Reverse MX A records (PTR)

  • 74.139.163.148.in-addr.arpa -> mx0b-00364e01.pphosted.com
  • 74.139.163.148.in-addr.arpa -> mx0b-00364e01.pphosted.com

PTR Records - OK

DNSSEC

DNSSEC Inspector
  • 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 (Sender Policy Framework)

SPF Record Published: Passed

Multiple SPF Records: Passed

SPF Record 1:
  • Record: v=spf1 ip4:128.59.72.0/24 ip4:207.10.139.0/24 ip4:148.163.139.74 ip4:148.163.135.74 include:_spf.google.com include:spf-00364e02.pphosted.com include:spf.protection.outlook.com ~all
  • SPF Syntax: Passed
  • Deprecated Elements: Passed
  • IP Addresses: 128.59.72.0/24, 207.10.139.0/24, 148.163.139.74, 148.163.135.74
  • Includes: _spf.google.com, spf-00364e02.pphosted.com, spf.protection.outlook.com
  • DNS Lookups: 4
  • Void Lookups: Passed
  • Escaping Chars: Not Present
  • All Mechanism: ~all

DKIM (DomainKeys Identified Mail)

  • DKIM Records Found: No
Warnings:
  • No DKIM records found for common selectors

DMARC

DMARC External Validation:
  • Valid external domains: emaildefense.proofpoint.com, emaildefense.proofpoint.com
  • All external domains in your DMARC record are giving permission to send them DMARC reports.
Check DNS for Another Domain

Use our DNS Checker to analyze DNS records for any domain.

Go to DNS Checker

Empower Your Network, Enhance Your DevOps: The Ultimate Online Tools Hub

Copyright © 2024 HTTPfy Terms & Conditions - Privacy Policy