Domain report: weibo.com

Registration

info

.com generic · Xiamen 35.com Information Co., Ltd. · expires 2027-03-20

TLD: .com (generic)
ICANN policies apply: yes
Registrar: Xiamen 35.com Information Co., Ltd.
Registered: 20 March 1999
Last changed: 21 March 2026
Expires: 20 March 2027
Status: server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers: ns1.sina.com.cn, ns2.sina.com.cn, ns3.sina.com, ns3.sina.com.cn, ns4.sina.com, ns4.sina.com.cn
RDAP server: https://rdap.verisign.com/com/v1/

i

.com is a generic TLD (gTLD)

Generic TLD under an ICANN registry agreement: ICANN-accredited registrars, UDRP and RDAP apply.

#1
✓ TLD delegated and signed #2

.com is delegated in the root zone and DNSSEC-signed.
✓ Expires on 2027-03-20 #3

The registration is valid until 2027-03-20 (148 days).
✓ Transfer locked #4

Registry status: server delete prohibited, server transfer prohibited, server update prohibited.
✓ Registry and delegation match #5

The nameservers registered at the registry are the ones published in DNS.

warn

ns1.sina.com.cn, ns2.sina.com.cn, ns3.sina.com, ns3.sina.com.cn, ns4.sina.com, ns4.sina.com.cn

Parent zone: com
Delegation from: a.gtld-servers.net (192.5.6.30)
NS at the parent: ns1.sina.com.cn, ns2.sina.com.cn, ns3.sina.com, ns3.sina.com.cn, ns4.sina.com, ns4.sina.com.cn
NS in the zone: ns1.sina.com.cn, ns2.sina.com.cn, ns3.sina.com, ns3.sina.com.cn, ns4.sina.com, ns4.sina.com.cn

Nameserver	Addresses	Network (AS)	Glue
ns1.sina.com.cn	221.179.193.14	AS9808 CHINAMOBILE-CN - China Mobile Communications Group Co., Ltd., CN	-
ns2.sina.com.cn	180.149.138.199	AS23724 CHINANET-IDC-BJ-AP - IDC, China Telecommunications Corporation, CN	-
ns3.sina.com	180.149.138.199	AS23724 CHINANET-IDC-BJ-AP - IDC, China Telecommunications Corporation, CN	180.149.138.199
ns3.sina.com.cn	123.125.29.99	AS4837 CHINA169-Backbone - CHINA UNICOM China169 Backbone, CN	-
ns4.sina.com	123.125.29.99	AS4837 CHINA169-Backbone - CHINA UNICOM China169 Backbone, CN	123.125.29.99
ns4.sina.com.cn	183.2.215.53	AS4134 CHINANET-BACKBONE - No.31,Jin-rong Street, CN	-

✓ 6 nameservers #6

Delegated to ns1.sina.com.cn, ns2.sina.com.cn, ns3.sina.com, ns3.sina.com.cn, ns4.sina.com, ns4.sina.com.cn.
✓ Parent and zone agree #7

The parent delegation and the zone's NS records list the same nameservers.
✓ No glue needed #8

All nameservers are outside the zone, so no glue records are needed.
✓ All names resolve #9

Every nameserver name has an address and is not an alias.
✓ Nameservers in different networks #10

The nameservers are spread over 4 IPv4 /24s and 0 IPv6 /48s.
✓ 4 autonomous systems #11

The nameservers are spread over: AS23724 (CHINANET-IDC-BJ-AP - IDC, China Telecommunications Corporation, CN): 2 addresses; AS4134 (CHINANET-BACKBONE - No.31,Jin-rong Street, CN): 1 address; AS4837 (CHINA169-Backbone - CHINA UNICOM China169 Backbone, CN): 2 addresses; AS9808 (CHINAMOBILE-CN - China Mobile Communications Group Co., Ltd., CN): 1 address.
✓ Nameserver names under 2 TLDs #12

Nameserver names use the TLDs .cn, .com.
!

No IPv6

None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.

#13

pass

6 of 6 addresses answer authoritatively

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
ns1.sina.com.cn 221.179.193.14	NOERROR, 132 ms, authoritative	no	yes / yes	refused	-
ns2.sina.com.cn 180.149.138.199	NOERROR, 164 ms, authoritative	no	yes / yes	refused	-
ns3.sina.com 180.149.138.199	NOERROR, 155 ms, authoritative	no	yes / yes	refused	-
ns3.sina.com.cn 123.125.29.99	NOERROR, 177 ms, authoritative	no	yes / yes	refused	-
ns4.sina.com 123.125.29.99	NOERROR, 135 ms, authoritative	no	yes / yes	refused	-
ns4.sina.com.cn 183.2.215.53	NOERROR, 204 ms, authoritative	no	yes / yes	refused	-

✓ All respond #14

All 6 nameserver addresses answered.
✓ All authoritative #15

Every responding nameserver answers authoritatively for the zone.
✓ No recursion #16

The nameservers do not answer recursive queries for other domains.
✓ No version disclosed #17

The nameservers don't reveal their software version.
✓ Zone transfers refused #18

No nameserver allows a zone transfer to the public.
✓ TCP supported #19

All nameservers answer over TCP.
✓ EDNS supported #20

All nameservers support EDNS(0).
✓ Public addresses #21

All nameserver addresses are publicly routable.

pass

serial 1 · primary ns1.sina.com.cn

✓ Serial 1 everywhere #22

All nameservers serve the same version of the zone.
✓ Timers within recommendations #23

SOA refresh 8h, retry 2h, expire 7d, negative TTL 10m.
✓ Primary is a public nameserver #24

The primary nameserver ns1.sina.com.cn is one of the listed nameservers.
✓ Contact zhihao@staff.sina.com.cn #25

The SOA RNAME zhihao.staff.sina.com.cn means zhihao@staff.sina.com.cn.
✓ Counter serial #26

The serial 1 is a plain counter.

warn

Not signed

warn

12 records at the apex

Type	Value	TTL
SOA	ns1.sina.com.cn. zhihao.staff.sina.com.cn. 1 28800 7200 604800 600	60
NS	ns3.sina.com.cn.	86400
NS	ns2.sina.com.cn.	86400
NS	ns3.sina.com.	86400
NS	ns1.sina.com.cn.	86400
NS	ns4.sina.com.	86400
NS	ns4.sina.com.cn.	86400
A	36.51.224.123	60
A	36.51.224.126	60
MX	10 mx.sina.net.	60
TXT	"google-site-verification=P4n0nSkaw97YPTZ_JTcVtmAnD8TzURwDaqKi8WGZSb4"	60
TXT	"v=spf1 include:spf.weibo.com -all"	60