51inbook.com - robtex.com
51inbook.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 38.48.245.237🇺🇸 AS39882338.48.192.0/18 | ||||||
| NS | ns7.alidns.com ⭐ | ||||||
| A | 2408:4009:501::3🇨🇳 Alibaba-Cloud2408:4009:501::/48 | ||||||
| A | 39.96.153.47🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC | ||||||
| A | 39.96.153.57🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC | ||||||
| A | 47.118.199.207🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd. | ||||||
| A | 47.118.199.217🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd. | ||||||
| A | 120.76.107.47🇨🇳 Alibaba-Cloud120.76.0.0/17 | ||||||
| A | 120.76.107.57🇨🇳 Alibaba-Cloud120.76.0.0/17 | ||||||
| A | 139.224.142.117🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District, | ||||||
| A | 139.224.142.127🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District, | ||||||
| NS | ns8.alidns.com | ||||||
| A | 2408:4009:501::4🇨🇳 Alibaba-Cloud2408:4009:501::/48 | ||||||
| A | 39.96.153.48🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC | ||||||
| A | 39.96.153.58🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC | ||||||
| A | 47.118.199.208🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd. | ||||||
| A | 47.118.199.218🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd. | ||||||
| A | 120.76.107.48🇨🇳 Alibaba-Cloud120.76.0.0/17 | ||||||
| A | 120.76.107.58🇨🇳 Alibaba-Cloud120.76.0.0/17 | ||||||
| A | 139.224.142.101🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District, | ||||||
| A | 139.224.142.118🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District, | ||||||
| SOA | ns7.alidns.comhostmaster@hichina.com 2026-01-12 #9 | ||||||
com
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.gtld-servers.net ⭐ | ||||||
| NS | b.gtld-servers.net | ||||||
| NS | c.gtld-servers.net | ||||||
| NS | d.gtld-servers.net | ||||||
| NS | e.gtld-servers.net | ||||||
| NS | f.gtld-servers.net | ||||||
| NS | g.gtld-servers.net | ||||||
| NS | h.gtld-servers.net | ||||||
| NS | i.gtld-servers.net | ||||||
| NS | j.gtld-servers.net | ||||||
| NS | k.gtld-servers.net | ||||||
| NS | l.gtld-servers.net | ||||||
| NS | m.gtld-servers.net | ||||||
| SOA | a.gtld-servers.netnstld@verisign-grs.com serial=1776888782 | ||||||
Subdomains
www.51inbook.com |
Same first word
51inbook.com |
DNS History
12 records (3 active, 9 former)
○NSjm1.dns.com2020-02-12 → 2020-02-12 · 4 obs
● 2020-02-12 06:11:58
○ 2026-03-31 07:14:42
○ 2026-04-22 20:38:24
○NSjm2.dns.com2020-02-12 → 2020-02-12 · 4 obs
● 2020-02-12 06:11:58
○ 2026-03-31 07:14:42
○ 2026-04-22 20:38:24
○NSjuming.dnsdun.com2017-03-14 → 2017-03-14 · 4 obs
● 2017-03-14 06:47:10
○ 2020-02-12 06:11:58
○ 2026-04-22 20:38:24
○NSjuming.dnsdun.net2017-03-14 → 2017-03-14 · 4 obs
● 2017-03-14 06:47:10
○ 2020-02-12 06:11:58
○ 2026-04-22 20:38:24
○NSns13.dns.com.cn2015-08-06 → 2015-12-03 · 4 obs
● 2015-12-03 15:51:18
○ 2016-07-09 16:48:28
○ 2026-04-22 20:38:24
○NSns14.dns.com.cn2015-08-06 → 2015-12-03 · 4 obs
● 2015-12-03 15:51:18
○ 2016-07-09 16:48:28
○ 2026-04-22 20:38:24
○NSns2.dns.com.cn2015-08-06 → 2015-08-06 · 3 obs
○ 2016-07-09 16:48:28
○ 2026-04-22 20:38:24
●NSns7.alidns.com2026-03-31 → 2026-04-22 · 3 obs
● 2026-03-31 07:14:42
● 2026-04-22 20:38:24
●NSns8.alidns.com2026-03-31 → 2026-04-22 · 3 obs
● 2026-03-31 07:14:42
● 2026-04-22 20:38:24
●A38.48.245.2372026-03-31 → 2026-04-22 · 3 obs
● 2026-03-31 07:14:42
● 2026-04-22 20:38:24
○A61.136.101.1812015-08-06 → 2015-12-03 · 4 obs
● 2015-12-03 15:51:18
○ 2016-07-09 16:48:28
○ 2026-04-22 20:38:24
○A76.164.205.1462017-03-14 → 2017-03-14 · 4 obs
● 2017-03-14 06:47:10
○ 2020-02-12 06:11:58
○ 2026-04-22 20:38:24
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, g.gtld-servers.net, c.gtld-servers.net, b.gtld-servers.net... | - |
| 51inbook.com | ns7.alidns.com, ns8.alidns.com | 18 records |
✅ Authoritative Response
Server:120.76.107.47
NS records: ns7.alidns.com, ns8.alidns.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for 51inbook.com (unsigned zone)
⏱️ Timing
Total: 491ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 38.48.245.237 |
| NS | 2 | ns8.alidns.com, ns7.alidns.com |
| SOA | 1 | ns7.alidns.com hostmaster.hichina.com |
📌 Glue Records Collected
Total: 18
Out-of-bailiwick: 18 (ns7.alidns.com, ns7.alidns.com, ns7.alidns.com...)
Analysis
Hierarchy
51inbook.com is the parent of www.51inbook.com.
IP Addresses
51inbook.com resolves to a single IP: 38.48.245.237.
Name Servers
51inbook.com has two name servers: ns7.alidns.com and ns8.alidns.com.
51inbook.com shares the same name server setup as other domains, for example xjw229709a9.shop, data-max.net, htvrcode.com, jnwyq.com and 24fa35a15477a6d0.top.
51inbook.com shares some name servers with other domains, for example happylvyou.com, wraa.org, juvenis.us, yykyjx.com and bookedhotels25.com.
These name servers are commonly used alongside expirens3.hichina.com, expirens4.hichina.com, ns1.alidns.com and ns2.alidns.com.
Host names with nine IP numbers:
ns7.alidns.com points to 2408:4009:501::3, 39.96.153.47, 39.96.153.57, 47.118.199.207, 47.118.199.217, 120.76.107.47, 120.76.107.57, 139.224.142.117 and 139.224.142.127.
ns8.alidns.com points to 2408:4009:501::4, 39.96.153.48, 39.96.153.58, 47.118.199.208, 47.118.199.218, 120.76.107.48, 120.76.107.58, 139.224.142.101 and 139.224.142.118.