DNS Report: 4.cn

Generated: 2026-08-09T05:01:05-05:00

78/100

Diagnostics

StatusCheckPointsDetails
OKIPv4 (A)30/301 IPv4 address(es) detected.
ERRORIPv6 (AAAA)0/100 IPv6 address(es) detected.
OKName server redundancy20/202 NS record(s); 2 or more required.
OKSOA record10/10Authoritative zone record.
ERRORDNSSEC chain0/15Both DS and DNSKEY are required.
ERRORCAA policy0/5Certificate authority restriction.
OKDNS propagation10/10Agreement between public resolvers.
OKMX records20/201 MX record(s).
OKSPF25/25SPF policy published.
OKDMARC25/25DMARC policy published.
OKDKIM20/20A DKIM selector was verified.
OKMTA-STS5/5Mail transport policy.
ERRORTLS-RPT0/5TLS reporting policy.
OKValid TLS certificate55/5588 day(s) remaining.
OKCertificate lifetime10/10Full points require at least 30 days remaining.
ERRORHTTP security headers0/350 of 9 evaluated headers detected.
OKPTR reverse DNS30/30PTR: ec2-69-234-239-50.cn-northwest-1.compute.amazonaws.com.cn
WARNINGIPv4 diversity20/35Two or more IPv4 addresses receive full points.
ERRORIPv6 connectivity0/35AAAA availability.
OKDNS resolution40/40At least one address family must resolve.
OKHTTP response40/40HTTP/2 200
OKHTTPS final URL20/20Final URL uses HTTPS.

DNS Records

TipoValues
A
69.234.239.50
AAAA
CNAME
MX
10 mail.tutanota.de.
TXT
"v=spf1 include:spf1.dm.aliyun.com -all"
"v=spf1 include:spf.tutanota.de -all"
"v=spf1 include:mailgun.org ~all"
"google-site-verification=pVWTtlccvil-QpeXyjIxnTgjkilaa5ohh4uyueBGEKM"
"t-verify=89ffdcb4e2e1d153eb5e018a03d3a8a9"
NS
vip4.alidns.com.
vip3.alidns.com.
SOA
vip3.alidns.com. hostmaster.hichina.com. 2025121112 3600 1200 86400 600
CAA
DS
DNSKEY
RRSIG
;; communications error to 69.64.44.20#53: timed out
;; communications error to 69.64.44.50#53: timed out
; <<>> DiG 9.18.39-0ubuntu0.22.04.4-Ubuntu <<>> 4.cn RRSIG +short +time=1 +tries=1
;; global options: +cmd
;; no servers could be reached
NSEC
NSEC3
SRV
NAPTR
TLSA
SSHFP