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DNS Report for t-mobile.com

Date Generated: 2024-08-05 05:56:05
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Nameservers

  • ns10.tmobileus.com
    • IPv4: 208.54.147.200
    • IPv6: 2607:fb90:c13e:fff0:4aa3:af08:0:aaaa
    • TTL (IPv4): 30 seconds
    • TTL (IPv6): 30 seconds
    • Recursive: N/A
  • ns10.zayo.com
    • IPv4: 64.125.228.105
    • IPv6: No IPv6 found
    • TTL (IPv4): 30 seconds
    • TTL (IPv6): N/A seconds
    • Recursive: N/A
  • ns7.customer.level3.net
    • IPv4: 209.244.4.116
    • IPv6: No IPv6 found
    • TTL (IPv4): 30 seconds
    • TTL (IPv6): N/A seconds
    • Recursive: N/A
  • ns20.zayo.com
    • IPv4: 64.125.226.44
    • IPv6: No IPv6 found
    • TTL (IPv4): 30 seconds
    • TTL (IPv6): N/A seconds
    • Recursive: N/A
  • ns10.tmobileus.net
    • IPv4: 208.54.99.244
    • IPv6: 2607:fb90:c13f:ffff:a255:5e9a:0:aaaa
    • TTL (IPv4): 30 seconds
    • TTL (IPv6): 30 seconds
    • Recursive: N/A
  • ns2.customer.level3.net
    • IPv4: 209.244.4.21
    • IPv6: No IPv6 found
    • TTL (IPv4): 30 seconds
    • TTL (IPv6): N/A seconds
    • Recursive: N/A

Nameserver Count - OK

Nameserver Queries

  • ns10.tmobileus.com
    • Status: Responded
    • IP(s): 45.60.171.103, 45.60.151.103
    • TTL: 900 seconds
    • Recursive Queries: Does not allow recursive queries
    • TCP Connectivity: TCP connection failed (Response code: REFUSED)
  • ns10.zayo.com
    • Status: Responded
    • IP(s): 45.60.151.103, 45.60.171.103
    • TTL: 900 seconds
    • Recursive Queries: Does not allow recursive queries
    • TCP Connectivity: TCP connection failed (Response code: REFUSED)
  • ns7.customer.level3.net
    • Status: Responded
    • IP(s): 45.60.151.103, 45.60.171.103
    • TTL: 900 seconds
    • Recursive Queries: Does not allow recursive queries
    • TCP Connectivity: TCP connection failed (Response code: REFUSED)
  • ns20.zayo.com
    • Status: Responded
    • IP(s): 45.60.171.103, 45.60.151.103
    • TTL: 900 seconds
    • Recursive Queries: Does not allow recursive queries
    • TCP Connectivity: TCP connection failed (Response code: REFUSED)
  • ns10.tmobileus.net
    • Status: Responded
    • IP(s): 45.60.151.103, 45.60.171.103
    • TTL: 900 seconds
    • Recursive Queries: Does not allow recursive queries
    • TCP Connectivity: TCP connection failed (Response code: REFUSED)
  • ns2.customer.level3.net
    • Status: Responded
    • IP(s): 45.60.151.103, 45.60.171.103
    • TTL: 900 seconds
    • Recursive Queries: Does not allow recursive queries
    • TCP Connectivity: TCP connection failed (Response code: REFUSED)

SOA Records

ns10.tmobileus.com
  • Serial: 3334553071
  • Refresh: 28800
  • Retry: 1800
  • Expire: 3600000
  • Minimum TTL: 900
ns10.zayo.com
  • Serial: 3334553071
  • Refresh: 28800
  • Retry: 1800
  • Expire: 3600000
  • Minimum TTL: 900
ns7.customer.level3.net
  • Serial: 3334553071
  • Refresh: 28800
  • Retry: 1800
  • Expire: 3600000
  • Minimum TTL: 900
ns20.zayo.com
  • Serial: 3334553071
  • Refresh: 28800
  • Retry: 1800
  • Expire: 3600000
  • Minimum TTL: 900
ns10.tmobileus.net
  • Serial: 3334553071
  • Refresh: 28800
  • Retry: 1800
  • Expire: 3600000
  • Minimum TTL: 900
ns2.customer.level3.net
  • Serial: 3334553071
  • Refresh: 28800
  • Retry: 1800
  • Expire: 3600000
  • Minimum TTL: 900

Serial: 3334553071 - OK

REFRESH: 28800 - OK

RETRY: 1800 - OK

EXPIRE: 3600000 - OK

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

MX Records

ns10.tmobileus.com
ns10.zayo.com
ns7.customer.level3.net
  • 10 tmobile-com0c.mail.protection.outlook.com ( 52.101.9.5 )
ns20.zayo.com
ns10.tmobileus.net
ns2.customer.level3.net

MX Record Consistency - Warning: Inconsistencies found

MX Record Count - Warning: Only one MX record

Reverse MX A records (PTR)

  • 21.41.101.52.in-addr.arpa -> mail-sj2pr05cu00305.inbound.protection.outlook.com
  • 6.40.101.52.in-addr.arpa -> mail-cy1pr03cu00106.inbound.protection.outlook.com
  • 14.9.101.52.in-addr.arpa -> mail-bl0pr03cu00206.inbound.protection.outlook.com
  • 14.10.101.52.in-addr.arpa -> mail-bn6pr04cu00206.inbound.protection.outlook.com
  • 5.9.101.52.in-addr.arpa -> mail-mn2pr04cu00205.inbound.protection.outlook.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 include:spf.protection.outlook.com include:spfa.t-mobile.com ip4:206.29.177.243/28 ip4:208.54.102.75/27 ip4:208.54.143.144/28 ip4:208.54.147.106/31 ip4:208.54.98.106/31 ip4:208.54.143.146/31 ip4:208.54.91.128/31 ip4:159.183.141.218 -all
  • SPF Syntax: Passed
  • Deprecated Elements: Passed
  • IP Addresses: 206.29.177.243/28, 208.54.102.75/27, 208.54.143.144/28, 208.54.147.106/31, 208.54.98.106/31, 208.54.143.146/31, 208.54.91.128/31, 159.183.141.218
  • Includes: spf.protection.outlook.com, spfa.t-mobile.com
  • DNS Lookups: 4
  • Void Lookups: Passed
  • Escaping Chars: Not Present
  • All Mechanism: -all

DKIM (DomainKeys Identified Mail)

  • DKIM Records Found: Yes
  • Selectors Found: selector1
  • Selector 'selector1':
    Record: v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCswi8VP8rPPVuJMaP7pzp5gaoxpyiEwRbrxD1Px0qClqFCXndD57+0SxF7bfBJpjZT80JMztsav7YuSMbnJGVmT4yXFNZjHaF71TZnJoX9hIBe3lCzGPhD7v/d6K0S1PipE1XW7zqqLLvJ+4FXve9s5Q3EiQ+iQkqYTW51CmeOlwIDAQAB; n=1024,1450836231,1
  • Valid Syntax: Yes

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.
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