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Domainwordpress.org
✓ 19 Pass ⚠ 4 Warn ✗ 1 Fail ℹ 9 Info
Action Items
Failures first, then warnings
Fail
MX Records
MX CNAME check
FAIL. MX hosts must not be CNAMEs: [{'host': 'smtp2-dca.wordpress.org', 'target': 'smtp2.dca.wordpress.org'}, {'host': 'smtp1-dca.wordpress.org', 'target': 'smtp1.dca.wordpress.org'}]
Warn
DNSSEC
DS records
No DS records found at parent.
Warn
DNSSEC
DNSSEC chain
No DS records found at parent. Domain appears unsigned.
Warn
SOA Record
SOA Retry
Retry: 7200 (2 hour(s)). Recommended range is 10 minutes to 1 hour.
Warn
SOA Record
SOA Minimum TTL
Min TTL: 86400 (1 day(s)). SOA Minimum TTL is 86400 (1 day). RFC 2308 redefines this as the Negative Cache TTL. A value of 3600 to 10800 (1-3 hours) is recommended to prevent prolonged outages for missing records.
PARENT
Info
Parent delegation records
Delegation NS records returned by parent zone org (b0.org.afilias-nst.org):
ns1.wordpress.orgglue=[198.181.116.10, 2a04:fa87:ffff::c6b5:740a] resolved=[198.181.116.10, 2a04:fa87:ffff::c6b5:740a][TTL=172800] ns2.wordpress.orgglue=[198.181.117.10, 2a04:fa87:ffff::c6b5:750a] resolved=[198.181.117.10, 2a04:fa87:ffff::c6b5:750a][TTL=172800] ns3.wordpress.orgglue=[192.0.74.10, 2620:115:c00f::c000:4a0a] resolved=[192.0.74.10, 2620:115:c00f::c000:4a0a][TTL=172800] ns4.wordpress.orgglue=[192.0.75.10, 2620:115:c00f::c000:4b0a] resolved=[192.0.75.10, 2620:115:c00f::c000:4b0a][TTL=172800]
PARENT
Pass
Nameservers listed at parent
Good. Parent server b0.org.afilias-nst.org has the nameservers listed.
PARENT
Pass
Nameserver IPv4 address records
Good. Every nameserver has IPv4 A records. IPv6 AAAA records are informational only.
PARENT
Pass
DNS Parent sent Glue
Good. Parent response included glue address records.
NS
Info
NS records
NS records from the nameservers. Address health checks validate IPv4 A records only.
ns1.wordpress.org[198.181.116.10][TTL=21600] ns2.wordpress.org[198.181.117.10][TTL=21600] ns3.wordpress.org[192.0.74.10][TTL=21600] ns4.wordpress.org[192.0.75.10][TTL=21600]
NS
Pass
Recursive queries
Good. The nameservers do not allow recursive queries for outside hosts.
ns1.wordpress.org 198.181.116.10 auth=ok recursion=closed tcp=ok serial=20123417 ns2.wordpress.org 198.181.117.10 auth=ok recursion=closed tcp=ok serial=20123417 ns3.wordpress.org 192.0.74.10 auth=ok recursion=closed tcp=ok serial=20123417 ns4.wordpress.org 192.0.75.10 auth=ok recursion=closed tcp=ok serial=20123417
NS
Pass
Multiple nameservers
Good. It have 4 nameservers. RFC2182 recommends at least 3.
NS
Pass
Different subnets
Good. Nameservers are on 4 different subnets.
NS
Pass
Public IPs
Good. All nameserver IPv4 addresses are public.
NS
Pass
DNS servers responded
Good. All nameserver IPv4 addresses responded.
ns1.wordpress.org 198.181.116.10 auth=ok recursion=closed tcp=ok serial=20123417 ns2.wordpress.org 198.181.117.10 auth=ok recursion=closed tcp=ok serial=20123417 ns3.wordpress.org 192.0.74.10 auth=ok recursion=closed tcp=ok serial=20123417 ns4.wordpress.org 192.0.75.10 auth=ok recursion=closed tcp=ok serial=20123417
NS
Pass
TCP connections
Good. All nameserver IPv4 addresses accept TCP connections on port 53.
ns1.wordpress.org 198.181.116.10 auth=ok recursion=closed tcp=ok serial=20123417 ns2.wordpress.org 198.181.117.10 auth=ok recursion=closed tcp=ok serial=20123417 ns3.wordpress.org 192.0.74.10 auth=ok recursion=closed tcp=ok serial=20123417 ns4.wordpress.org 192.0.75.10 auth=ok recursion=closed tcp=ok serial=20123417
NS
Pass
Delegation mismatch
Good. NS records match between parent and authoritative servers.
NS
Pass
SOA serial consistency
Good. All nameservers agree on SOA serial: 20123417.
ns1.wordpress.org 198.181.116.10 auth=ok recursion=closed tcp=ok serial=20123417 ns2.wordpress.org 198.181.117.10 auth=ok recursion=closed tcp=ok serial=20123417 ns3.wordpress.org 192.0.74.10 auth=ok recursion=closed tcp=ok serial=20123417 ns4.wordpress.org 192.0.75.10 auth=ok recursion=closed tcp=ok serial=20123417
SOA
Info
SOA record
SOA record details:
Primary NS : ns1.wordpress.org Hostmaster : hostmaster@wordpress.org Serial : 20123417 Refresh : 7200 Retry : 7200 Expire : 1209600 Min TTL : 86400
SOA
Pass
SOA MNAME
OK. ns1.wordpress.org is listed in the NS records.
SOA
Info
SOA Serial
Current SOA serial is 20123417. RFC 1912 recommends the YYYYMMDDnn date-based format(Year-Month-Day-Revision).
SOA
Pass
SOA Refresh
Refresh: 7200 (2 hour(s)). OK. Within recommended 1 to 24 hours range.
SOA
Warn
SOA Retry
Retry: 7200 (2 hour(s)). Recommended range is 10 minutes to 1 hour.
SOA
Pass
SOA Expire
Expire: 1209600 (14 day(s)). OK.
SOA
Warn
SOA Minimum TTL
Min TTL: 86400 (1 day(s)). SOA Minimum TTL is 86400 (1 day). RFC 2308 redefines this as the Negative Cache TTL. A value of 3600 to 10800 (1-3 hours) is recommended to prevent prolonged outages for missing records.
MX
Info
MX Records
Current MX records:
10 smtp2-dca.wordpress.org [66.6.42.147] 10 smtp1-dca.wordpress.org [66.6.42.146]
MX
Pass
MX count
Zone have 2 MX record(s). Good redundancy.
MX
Pass
MX IPv4 addresses are public
Good. All MX records use public IPv4 addresses.
MX
Pass
MX is hostname
Good. All MX records use hostnames, not IP addresses.
MX
Fail
MX CNAME check
FAIL. MX hosts must not be CNAMEs: [{'host': 'smtp2-dca.wordpress.org', 'target': 'smtp2.dca.wordpress.org'}, {'host': 'smtp1-dca.wordpress.org', 'target': 'smtp1.dca.wordpress.org'}]
MX
Pass
Reverse PTR records
PTR (reverse DNS) records for MX hosts:
66.6.42.147 → smtp2.dca.wordpress.org 66.6.42.146 → smtp1.dca.wordpress.org
DNSSEC
Warn
DS records
No DS records found at parent.
DNSSEC
Info
DNSKEY records
No DNSKEY records found at child.
DNSSEC
Warn
DNSSEC chain
No DS records found at parent. Domain appears unsigned.
WWW
Info
WWW A Record
www.wordpress.org resolves to:
66.6.42.252
WWW
Info
WWW AAAA (IPv6)
IPv6 addresses:
2620:109:b00a::4206:2afc
WWW
Pass
WWW IPv4 addresses are public
Good. All WWW IPv4 addresses are public.
WWW
Info
WWW CNAME
www.wordpress.org has a CNAME pointing to wordpress.org.
Processed in 0.217s · Real DNS resolution via dnspython · Wed, 23 Sep 2026 20:34:28 GMT