sina.com
sina.com is registered with Xin Net Technology Corporation since September 16, 1998 (28.1 years). The registration expires on September 15, 2028. The site runs on Nginx. Its email security grade is F. Its SSL certificate is issued by DigiCert, Inc. and is valid for 35 more days.
- Domain age
- 28.1 yrs
- Technologies
- 1
- Email security
- F
- SSL days left
- 35
Registration
| Registrar | Xin Net Technology Corporation |
|---|---|
| IANA ID | 120 |
| Registered | September 16, 1998 |
| Expires | September 15, 2028 |
| Updated | December 29, 2025 |
| Status | client transfer prohibited, client update prohibited, server delete prohibited, server transfer prohibited, server update prohibited |
| Name servers | ns1.sina.com, ns1.sina.com.cn, ns2.sina.com, ns2.sina.com.cn, ns3.sina.com, ns3.sina.com.cn, ns4.sina.com |
| DNSSEC | Not signed |
DNS records
| Type | Value | TTL |
|---|---|---|
| A | 64.71.151.11 | 60 |
| MX | freemx2.sinamail.sina.com.cn 10 | 60 |
| MX | freemx3.sinamail.sina.com.cn 10 | 60 |
| MX | freemx1.sinamail.sina.com.cn 10 | 60 |
| NS | ns1.sina.com.cn | 86400 |
| NS | ns2.sina.com.cn | 86400 |
| NS | ns4.sina.com.cn | 86400 |
| NS | ns4.sina.com | 86400 |
| NS | ns1.sina.com | 86400 |
| NS | ns3.sina.com.cn | 86400 |
| NS | ns3.sina.com | 86400 |
| NS | ns2.sina.com | 86400 |
| TXT | v=spf1 include:spf.sinamail.sina.com.cn -all | 60 |
Technology stack
SSL certificate
| Valid | Valid |
|---|---|
| Issuer | US, GeoTrust G2 TLS CN RSA4096 SHA256 2022 CA1, DigiCert, Inc. |
| Expires | December 15, 2026 |
| Days remaining | 35 |
| Protocol | TLSv1.2 |
| Names | *.sina.com, sina.com |
Email security
- warnDMARC policy is none (monitoring only). Spoofed mail is still delivered.
- warnDMARC has no rua= address, so you receive no reports about mail sent as your domain.
- warnNo DKIM key found at common selectors (google, selector1, selector2, default, k1, k2, s1, s2, ...). DKIM may still use a custom selector we cannot guess.
- warnNo MTA-STS: mail sent to you can be downgraded to an unencrypted connection.
- warnNo TLS-RPT record, so you won't hear about failed encrypted deliveries.
- warnNo BIMI record (optional: shows your logo next to your emails in supporting inboxes).
- goodSPF record found.
- goodSPF ends with -all: servers you have not listed are rejected (hard fail).
- good3 MX record(s) found.
Homepage metadata
| Indexable | Yes |
|---|---|
| Word count | 0 |
About sina.com
Who is the registrar of sina.com?
sina.com is registered with Xin Net Technology Corporation (IANA ID 120).
When does sina.com expire?
The current registration of sina.com expires on September 15, 2028. It was first registered on September 16, 1998.
What technology does sina.com use?
We detected 1 technologies on sina.com, including Nginx.
Does sina.com protect its email with SPF and DMARC?
sina.com scores 44/100 (grade F) for email security. DMARC policy is none (monitoring only). Spoofed mail is still delivered. DMARC has no rua= address, so you receive no reports about mail sent as your domain.
What are the name servers of sina.com?
sina.com uses ns1.sina.com.cn, ns2.sina.com.cn, ns4.sina.com.cn, ns4.sina.com, ns1.sina.com, ns3.sina.com.cn, ns3.sina.com, ns2.sina.com.