mail.57class.net - robtex.com

mail.57class.net

CNAMEexmail.qq.com
DNSSEC⚠️ Not signed
NSns-cmn1.qq.com ⚠️ Not in parent delegation
A2402:4e00:111:ff4::3🇨🇳 TENCENT-NET-AP2402:4e00::/35
A42.187.235.2🇨🇳 TENCENT-NET-AP42.187.192.0/18 chinanet/CN2 TianJin province network
A43.140.54.204🇨🇳 TENCENT-NET-AP43.140.0.0/18 Tencent Cloud Computing (Beijing) Co., Ltd 309 West Zone, 3F. 49 Zhichun Road. Haidian District.
A43.142.212.27🇨🇳 TENCENT-NET-AP43.142.192.0/18
NSns-cnc1.qq.com ⚠️ Not in parent delegation
A240e:e1:aa00:2002::3🇨🇳 SHANGHAITELECOM240e:e1:a000::/36 SHIDC
A61.135.196.2🇨🇳 CHINA169-BJ61.135.196.0/24
A140.207.180.96🇨🇳 UNICOM-SHFT-IDC140.207.180.0/24 China Unicom B811&A1218, China Unicom No.21, Jin-Rong Street
A157.255.6.102🇨🇳 UNICOM-GuangZhou-IDC157.255.6.0/24
NSns-os1.qq.com ⚠️ Not in parent delegation
A2402:4e00:111:ff4::3🇨🇳 TENCENT-NET-AP2402:4e00::/35
A43.129.131.16🇸🇬 TENCENT-NET-AP-CN43.129.128.0/20
A43.130.172.23🇸🇬 TENCENT-NET-AP-CN43.130.160.0/19 ACEVILLE PTE.LTD. 16 COLLYER QUAY 18-29 INCOME AT RAFFLES
A43.134.249.23🇸🇬 TENCENT-NET-AP-CN43.134.224.0/19 ACEVILLE PTE.LTD. 16 COLLYER QUAY 18-29 INCOME AT RAFFLES
A43.159.167.10🇺🇸 TENCENT-NET-AP-CN43.159.160.0/19 ACEVILLE PTE.LTD. 16 COLLYER QUAY 18-29 INCOME AT RAFFLES
A43.159.167.133🇺🇸 TENCENT-NET-AP-CN43.159.160.0/19 ACEVILLE PTE.LTD. 16 COLLYER QUAY 18-29 INCOME AT RAFFLES
A43.166.55.3🇸🇬 TENCENT-NET-AP-CN43.166.0.0/18 ACEVILLE PTE.LTD. 16 COLLYER QUAY 18-29 INCOME AT RAFFLES
A49.51.76.46🇺🇸 TENCENT-NET-AP-CN49.51.76.0/23 Proxy-registered route object
A170.106.32.16🇺🇸 TENCENT-NET-AP-CN170.106.32.0/22 Proxy-registered route object
A203.205.220.26🇭🇰 TENCENT-NET-AP-CN203.205.220.0/23 Proxy-registered route object
NSns-tel1.qq.com ⚠️ Not in parent delegation
A240e:e1:aa00:2002::3🇨🇳 SHANGHAITELECOM240e:e1:a000::/36 SHIDC
A14.116.238.220🇨🇳 CHINANET-BACKBONE14.112.0.0/12 China Telecom Network
A49.7.250.139🇨🇳 CHINA-149.7.192.0/18 China Telecom Beijing Co. Ltd.
A101.227.161.254🇨🇳 SHANGHAITELECOM101.227.161.0/24 SHIDC

57class.net

DNSSEC⚠️ Not signed
NSf1g1ns1.dnspod.net ⭐
NSf1g1ns2.dnspod.net
MXmxbiz1.qq.com ⭐
MXmxbiz2.qq.com(10)
TXTMS=3BF2957747C54AE1B323D6EABDBB8519DBA769BA
TXTMS=ms76149809
SOAf1g1ns1.dnspod.netfreednsadmin@dnspod.com serial=1747711575

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DNS History

7 records (1 active, 6 former)

20162017201820192020202120222023202420252026MXmxbiz1.qq.commxbiz2.qq.comA103.7.30.46162.159.208.26162.159.209.26CNAMEexmail.qq.comexmail.wechatos.net
○MXmxbiz1.qq.com2016-03-19 → 2016-03-19 · 3 obs
● 2016-03-19 17:59:40
○ 2016-07-17 16:25:34
○ 2026-04-19 20:02:50
○MXmxbiz2.qq.com2016-03-19 → 2016-03-19 · 3 obs
● 2016-03-19 17:59:40
○ 2016-07-17 16:25:34
○ 2026-04-19 20:02:50
○A103.7.30.462015-07-09 → 2016-03-19 · 4 obs
● 2015-07-09 02:29:12
● 2016-03-19 17:59:40
○ 2016-07-17 16:25:34
○ 2026-04-19 20:02:50
○A162.159.208.262016-07-17 → 2016-07-17 · 4 obs
○ 2016-03-19 17:59:40
● 2016-07-17 16:25:34
○ 2026-04-19 20:02:46
○ 2026-04-19 20:02:50
○A162.159.209.262016-07-17 → 2016-07-17 · 4 obs
○ 2016-03-19 17:59:40
● 2016-07-17 16:25:34
○ 2026-04-19 20:02:46
○ 2026-04-19 20:02:50
●CNAMEexmail.qq.com2015-07-09 → 2026-04-19 · 5 obs
● 2015-07-09 02:29:12
● 2016-03-19 17:59:40
○ 2016-07-17 16:25:34
● 2026-04-19 20:02:46
● 2026-04-19 20:02:50
○CNAMEexmail.wechatos.net2015-12-11 → 2016-03-19 · 5 obs
○ 2015-07-09 02:29:12
● 2015-12-11 05:09:38
● 2016-03-19 17:59:40
○ 2016-07-17 16:25:34
○ 2026-04-19 20:02:50

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
neta.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...-
57class.netf1g1ns1.dnspod.net, f1g1ns2.dnspod.net15 records

✅ Authoritative Response

Server:1.12.0.4

NS records: f1g1ns1.dnspod.net, f1g1ns2.dnspod.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 57class.net (unsigned zone)

⏱️ Timing

Total: 170ms | Queries: -

📄 Records

TypeCountSample Data
CNAME1exmail.qq.com

📌 Glue Records Collected

Total: 15

Out-of-bailiwick: 15 (f1g1ns1.dnspod.net, f1g1ns1.dnspod.net, f1g1ns1.dnspod.net...)

Analysis

Name Servers

mail.57class.net is delegated to four name servers: ns-cmn1.qq.com, ns-cnc1.qq.com, ns-os1.qq.com and ns-tel1.qq.com.

mail.57class.net at least partially shares name servers with other domains, for instance chongfwd.qq.com, mhzx.qq.com, smtpbg344.qq.com, 00.qq.com and worldcup.qq.com.

These name servers are commonly used with ns1.qq.com, ns2.qq.com, ns3.qq.com and ns4.qq.com.

Host names with ten IP numbers:

The host name ns-os1.qq.com points to: 2402:4e00:111:ff4::3, 43.129.131.16, 43.130.172.23, 43.134.249.23, 43.159.167.10, 43.159.167.133, 43.166.55.3, 49.51.76.46, 170.106.32.16 and 203.205.220.26.

Host names with four IP numbers:

The host name ns-cmn1.qq.com points to: 2402:4e00:111:ff4::3, 42.187.235.2, 43.140.54.204 and 43.142.212.27.

The host name ns-cnc1.qq.com points to: 240e:e1:aa00:2002::3, 61.135.196.2, 140.207.180.96 and 157.255.6.102.

The host name ns-tel1.qq.com points to: 240e:e1:aa00:2002::3, 14.116.238.220, 49.7.250.139 and 101.227.161.254.

Host names that point to 2402:4e00:111:ff4::3: ns-os1.qq.com and ns-cmn1.qq.com.

Host names that point to 240e:e1:aa00:2002::3: ns-cnc1.qq.com and ns-tel1.qq.com.