DNS Report: bt.cn

Generated: 2026-08-09T07:33:11-05:00

79/100

Diagnostics

StatusCheckPointsDetails
OKIPv4 (A)30/301 IPv4 address(es) detected.
OKIPv6 (AAAA)10/101 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.
ERRORMTA-STS0/5Mail transport policy.
ERRORTLS-RPT0/5TLS reporting policy.
OKValid TLS certificate55/558 day(s) remaining.
WARNINGCertificate lifetime2/10Full points require at least 30 days remaining.
WARNINGHTTP security headers4/351 of 9 evaluated headers detected.
ERRORPTR reverse DNS0/30PTR not detected.
WARNINGIPv4 diversity20/35Two or more IPv4 addresses receive full points.
OKIPv6 connectivity35/35AAAA 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
157.255.129.251
AAAA
2001:19f0:7001:54fc:5400:2ff:fe9b:97f9
CNAME
MX
10 mail.bt.cn.
TXT
"v=spf1 a mx -all"
"google-site-verification=T_Dp27KV30n1mzB0BwaVHZzAR7CYJ7E6DCNU30fz1CY"
"202006140135465jku4f66s84knkzqfhymyot20dlksu51gbge4j93nmd9rutp4i"
NS
vip4.alidns.com.
vip3.alidns.com.
SOA
vip3.alidns.com. hostmaster.hichina.com. 2025121607 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 <<>> bt.cn RRSIG +short +time=1 +tries=1
;; global options: +cmd
;; no servers could be reached
NSEC
NSEC3
SRV
NAPTR
TLSA
SSHFP